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Merge branch 'master' of https://github.com/eugenp/tutorials

This commit is contained in:
Sunil Gulabani 2017-02-10 13:25:29 +05:30
parent a55d19e6c7 426944f72b
commit a09e314e38
917 changed files with 59736 additions and 3813 deletions
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2
.gitignore vendored
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@ -27,3 +27,5 @@ target/
spring-openid/src/main/resources/application.properties
.recommenders/
/spring-hibernate4/nbproject/
spring-security-openid/src/main/resources/application.properties

17
.travis.yml Normal file
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language: java
install: travis_wait 40 mvn -q clean install -Dgib.enabled=true
jdk:
- oraclejdk8
sudo: false
addons:
apt:
packages:
- oracle-java8-installer
cache:
directories:
- .autoconf
- $HOME/.m2

63
JGit/pom.xml Normal file
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@ -0,0 +1,63 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>JGitSnippets</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<repositories>
<repository>
<id>jgit-repository</id>
<url>https://repo.eclipse.org/content/groups/releases/</url>
</repository>
</repositories>
<!-- Core Library -->
<dependencies>
<dependency>
<groupId>org.eclipse.jgit</groupId>
<artifactId>org.eclipse.jgit</artifactId>
<version>4.5.0.201609210915-r</version>
</dependency>
<dependency>
<groupId>org.eclipse.jgit</groupId>
<artifactId>org.eclipse.jgit.archive</artifactId>
<version>4.5.0.201609210915-r</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

30
JGit/src/main/java/com/baeldung/jgit/CreateNewRepository.java Normal file
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@ -0,0 +1,30 @@
package com.baeldung.jgit;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
/**
* Simple snippet which shows how to create a new repository
*
*
*/
public class CreateNewRepository {
public static void main(String[] args) throws IOException, IllegalStateException, GitAPIException {
// prepare a new folder
File localPath = File.createTempFile("TestGitRepository", "");
if(!localPath.delete()) {
throw new IOException("Could not delete temporary file " + localPath);
}
// create the directory
try (Git git = Git.init().setDirectory(localPath).call()) {
System.out.println("Having repository: " + git.getRepository().getDirectory());
}
FileUtils.deleteDirectory(localPath);
}
}

65
JGit/src/main/java/com/baeldung/jgit/OpenRepository.java Normal file
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@ -0,0 +1,65 @@
package com.baeldung.jgit;
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
import java.io.File;
import java.io.IOException;
/**
* Simple snippet which shows how to open an existing repository
*
*
*/
public class OpenRepository {
public static void main(String[] args) throws IOException, GitAPIException {
// first create a test-repository, the return is including the .get directory here!
File repoDir = createSampleGitRepo();
// now open the resulting repository with a FileRepositoryBuilder
FileRepositoryBuilder builder = new FileRepositoryBuilder();
try (Repository repository = builder.setGitDir(repoDir)
.readEnvironment() // scan environment GIT_* variables
.findGitDir() // scan up the file system tree
.build()) {
System.out.println("Having repository: " + repository.getDirectory());
// the Ref holds an ObjectId for any type of object (tree, commit, blob, tree)
Ref head = repository.exactRef("refs/heads/master");
System.out.println("Ref of refs/heads/master: " + head);
}
}
private static File createSampleGitRepo() throws IOException, GitAPIException {
try (Repository repository = Helper.createNewRepository()) {
System.out.println("Temporary repository at " + repository.getDirectory());
// create the file
File myfile = new File(repository.getDirectory().getParent(), "testfile");
if(!myfile.createNewFile()) {
throw new IOException("Could not create file " + myfile);
}
// run the add-call
try (Git git = new Git(repository)) {
git.add()
.addFilepattern("testfile")
.call();
// and then commit the changes
git.commit()
.setMessage("Added testfile")
.call();
}
System.out.println("Added file " + myfile + " to repository at " + repository.getDirectory());
return repository.getDirectory();
}
}
}

33
JGit/src/main/java/com/baeldung/jgit/helper/Helper.java Normal file
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@ -0,0 +1,33 @@
package com.baeldung.jgit.helper;
import java.io.File;
import java.io.IOException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
public class Helper {
public static Repository openJGitRepository() throws IOException {
FileRepositoryBuilder builder = new FileRepositoryBuilder();
return builder
.readEnvironment() // scan environment GIT_* variables
.findGitDir() // scan up the file system tree
.build();
}
public static Repository createNewRepository() throws IOException {
// prepare a new folder
File localPath = File.createTempFile("TestGitRepository", "");
if(!localPath.delete()) {
throw new IOException("Could not delete temporary file " + localPath);
}
// create the directory
Repository repository = FileRepositoryBuilder.create(new File(localPath, ".git"));
repository.create();
return repository;
}
}

36
JGit/src/main/java/com/baeldung/jgit/porcelain/AddFile.java Normal file
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@ -0,0 +1,36 @@
package com.baeldung.jgit.porcelain;
import java.io.File;
import java.io.IOException;
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Repository;
/**
* Simple snippet which shows how to add a file to the index
*
*
*/
public class AddFile {
public static void main(String[] args) throws IOException, GitAPIException {
// prepare a new test-repository
try (Repository repository = Helper.createNewRepository()) {
try (Git git = new Git(repository)) {
// create the file
File myfile = new File(repository.getDirectory().getParent(), "testfile");
if(!myfile.createNewFile()) {
throw new IOException("Could not create file " + myfile);
}
// run the add-call
git.add()
.addFilepattern("testfile")
.call();
System.out.println("Added file " + myfile + " to repository at " + repository.getDirectory());
}
}
}
}

51
JGit/src/main/java/com/baeldung/jgit/porcelain/CommitAll.java Normal file
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@ -0,0 +1,51 @@
package com.baeldung.jgit.porcelain;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Repository;
/**
* Simple snippet which shows how to commit all files
*
*
*/
public class CommitAll {
public static void main(String[] args) throws IOException, GitAPIException {
// prepare a new test-repository
try (Repository repository = Helper.createNewRepository()) {
try (Git git = new Git(repository)) {
// create the file
File myfile = new File(repository.getDirectory().getParent(), "testfile");
if(!myfile.createNewFile()) {
throw new IOException("Could not create file " + myfile);
}
// Stage all files in the repo including new files
git.add().addFilepattern(".").call();
// and then commit the changes.
git.commit()
.setMessage("Commit all changes including additions")
.call();
try(PrintWriter writer = new PrintWriter(myfile)) {
writer.append("Hello, world!");
}
// Stage all changed files, omitting new files, and commit with one command
git.commit()
.setAll(true)
.setMessage("Commit changes to all files")
.call();
System.out.println("Committed all changes to repository at " + repository.getDirectory());
}
}
}
}

56
JGit/src/main/java/com/baeldung/jgit/porcelain/CreateAndDeleteTag.java Normal file
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@ -0,0 +1,56 @@
package com.baeldung.jgit.porcelain;
import java.io.IOException;
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
/**
* Simple snippet which shows how to create a tag
*
*
*/
public class CreateAndDeleteTag {
public static void main(String[] args) throws IOException, GitAPIException {
// prepare test-repository
try (Repository repository = Helper.openJGitRepository()) {
try (Git git = new Git(repository)) {
// remove the tag before creating it
git.tagDelete().setTags("tag_for_testing").call();
// set it on the current HEAD
Ref tag = git.tag().setName("tag_for_testing").call();
System.out.println("Created/moved tag " + tag + " to repository at " + repository.getDirectory());
// remove the tag again
git.tagDelete().setTags("tag_for_testing").call();
// read some other commit and set the tag on it
ObjectId id = repository.resolve("HEAD^");
try (RevWalk walk = new RevWalk(repository)) {
RevCommit commit = walk.parseCommit(id);
tag = git.tag().setObjectId(commit).setName("tag_for_testing").call();
System.out.println("Created/moved tag " + tag + " to repository at " + repository.getDirectory());
// remove the tag again
git.tagDelete().setTags("tag_for_testing").call();
// create an annotated tag
tag = git.tag().setName("tag_for_testing").setAnnotated(true).call();
System.out.println("Created/moved tag " + tag + " to repository at " + repository.getDirectory());
// remove the tag again
git.tagDelete().setTags("tag_for_testing").call();
walk.dispose();
}
}
}
}
}

74
JGit/src/main/java/com/baeldung/jgit/porcelain/Log.java Normal file
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@ -0,0 +1,74 @@
package com.baeldung.jgit.porcelain;
import java.io.IOException;
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
/**
* Simple snippet which shows how to get the commit-ids for a file to provide log information.
*
*
*/
public class Log {
@SuppressWarnings("unused")
public static void main(String[] args) throws IOException, GitAPIException {
try (Repository repository = Helper.openJGitRepository()) {
try (Git git = new Git(repository)) {
Iterable<RevCommit> logs = git.log()
.call();
int count = 0;
for (RevCommit rev : logs) {
//System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
count++;
}
System.out.println("Had " + count + " commits overall on current branch");
logs = git.log()
.add(repository.resolve("remotes/origin/testbranch"))
.call();
count = 0;
for (RevCommit rev : logs) {
System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
count++;
}
System.out.println("Had " + count + " commits overall on test-branch");
logs = git.log()
.all()
.call();
count = 0;
for (RevCommit rev : logs) {
//System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
count++;
}
System.out.println("Had " + count + " commits overall in repository");
logs = git.log()
// for all log.all()
.addPath("README.md")
.call();
count = 0;
for (RevCommit rev : logs) {
//System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
count++;
}
System.out.println("Had " + count + " commits on README.md");
logs = git.log()
// for all log.all()
.addPath("pom.xml")
.call();
count = 0;
for (RevCommit rev : logs) {
//System.out.println("Commit: " + rev /* + ", name: " + rev.getName() + ", id: " + rev.getId().getName() */);
count++;
}
System.out.println("Had " + count + " commits on pom.xml");
}
}
}
}

31
JGit/src/test/java/com/baeldung/jgit/JGitBugTest.java Normal file
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@ -0,0 +1,31 @@
import com.baeldung.jgit.helper.Helper;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevWalk;
import org.junit.Test;
import java.io.IOException;
import static org.junit.Assert.assertNotNull;
/**
* Tests which show issues with JGit that we reported upstream.
*/
public class JGitBugTest {
@Test
public void testRevWalkDisposeClosesReader() throws IOException {
try (Repository repo = Helper.openJGitRepository()) {
try (ObjectReader reader = repo.newObjectReader()) {
try (RevWalk walk = new RevWalk(reader)) {
walk.dispose();
Ref head = repo.exactRef("refs/heads/master");
System.out.println("Found head: " + head);
ObjectLoader loader = reader.open(head.getObjectId());
assertNotNull(loader);
}
}
}
}
}

17
JGit/src/test/java/com/baeldung/jgit/porcelain/PorcelainTest.java Normal file
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@ -0,0 +1,17 @@
package com.baeldung.jgit.porcelain;
import org.junit.Test;
public class PorcelainTest {
@Test
public void runSamples() throws Exception {
// simply call all the samples to see any severe problems with the samples
AddFile.main(null);
CommitAll.main(null);
CreateAndDeleteTag.main(null);
Log.main(null);
}
}

44
algorithms/pom.xml Normal file
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@ -0,0 +1,44 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>algorithms</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<junit.version>4.12</junit.version>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<defaultGoal>install</defaultGoal>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>${exec-maven-plugin.version}</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

57
algorithms/src/main/java/com/baeldung/algorithms/dijkstra/Dijkstra.java Normal file
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@ -0,0 +1,57 @@
package com.baeldung.algorithms.dijkstra;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map.Entry;
import java.util.Set;
public class Dijkstra {
public static Graph calculateShortestPathFromSource(Graph graph, Node source) {
source.setDistance(0);
Set<Node> settledNodes = new HashSet<>();
Set<Node> unsettledNodes = new HashSet<>();
unsettledNodes.add(source);
while (unsettledNodes.size() != 0) {
Node currentNode = getLowestDistanceNode(unsettledNodes);
unsettledNodes.remove(currentNode);
for (Entry<Node, Integer> adjacencyPair : currentNode.getAdjacentNodes().entrySet()) {
Node adjacentNode = adjacencyPair.getKey();
Integer edgeWeigh = adjacencyPair.getValue();
if (!settledNodes.contains(adjacentNode)) {
CalculateMinimumDistance(adjacentNode, edgeWeigh, currentNode);
unsettledNodes.add(adjacentNode);
}
}
settledNodes.add(currentNode);
}
return graph;
}
private static void CalculateMinimumDistance(Node evaluationNode, Integer edgeWeigh, Node sourceNode) {
Integer sourceDistance = sourceNode.getDistance();
if (sourceDistance + edgeWeigh < evaluationNode.getDistance()) {
evaluationNode.setDistance(sourceDistance + edgeWeigh);
LinkedList<Node> shortestPath = new LinkedList<>(sourceNode.getShortestPath());
shortestPath.add(sourceNode);
evaluationNode.setShortestPath(shortestPath);
}
}
private static Node getLowestDistanceNode(Set<Node> unsettledNodes) {
Node lowestDistanceNode = null;
int lowestDistance = Integer.MAX_VALUE;
for (Node node : unsettledNodes) {
int nodeDistance = node.getDistance();
if (nodeDistance < lowestDistance) {
lowestDistance = nodeDistance;
lowestDistanceNode = node;
}
}
return lowestDistanceNode;
}
}

21
algorithms/src/main/java/com/baeldung/algorithms/dijkstra/Graph.java Normal file
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@ -0,0 +1,21 @@
package com.baeldung.algorithms.dijkstra;
import java.util.HashSet;
import java.util.Set;
public class Graph {
private Set<Node> nodes = new HashSet<>();
public void addNode(Node nodeA) {
nodes.add(nodeA);
}
public Set<Node> getNodes() {
return nodes;
}
public void setNodes(Set<Node> nodes) {
this.nodes = nodes;
}
}

58
algorithms/src/main/java/com/baeldung/algorithms/dijkstra/Node.java Normal file
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@ -0,0 +1,58 @@
package com.baeldung.algorithms.dijkstra;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
public class Node {
private String name;
private LinkedList<Node> shortestPath = new LinkedList<>();
private Integer distance = Integer.MAX_VALUE;
private Map<Node, Integer> adjacentNodes = new HashMap<>();
public Node(String name) {
this.name = name;
}
public void addDestination(Node destination, int distance) {
adjacentNodes.put(destination, distance);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Map<Node, Integer> getAdjacentNodes() {
return adjacentNodes;
}
public void setAdjacentNodes(Map<Node, Integer> adjacentNodes) {
this.adjacentNodes = adjacentNodes;
}
public Integer getDistance() {
return distance;
}
public void setDistance(Integer distance) {
this.distance = distance;
}
public List<Node> getShortestPath() {
return shortestPath;
}
public void setShortestPath(LinkedList<Node> shortestPath) {
this.shortestPath = shortestPath;
}
}

75
algorithms/src/test/java/algorithms/DijkstraAlgorithmTest.java Normal file
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@ -0,0 +1,75 @@
package algorithms;
import com.baeldung.algorithms.dijkstra.Dijkstra;
import com.baeldung.algorithms.dijkstra.Graph;
import com.baeldung.algorithms.dijkstra.Node;
import org.junit.Test;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.assertTrue;
public class DijkstraAlgorithmTest {
@Test
public void whenSPPSolved_thenCorrect() {
Node nodeA = new Node("A");
Node nodeB = new Node("B");
Node nodeC = new Node("C");
Node nodeD = new Node("D");
Node nodeE = new Node("E");
Node nodeF = new Node("F");
nodeA.addDestination(nodeB, 10);
nodeA.addDestination(nodeC, 15);
nodeB.addDestination(nodeD, 12);
nodeB.addDestination(nodeF, 15);
nodeC.addDestination(nodeE, 10);
nodeD.addDestination(nodeE, 2);
nodeD.addDestination(nodeF, 1);
nodeF.addDestination(nodeE, 5);
Graph graph = new Graph();
graph.addNode(nodeA);
graph.addNode(nodeB);
graph.addNode(nodeC);
graph.addNode(nodeD);
graph.addNode(nodeE);
graph.addNode(nodeF);
graph = Dijkstra.calculateShortestPathFromSource(graph, nodeA);
List<Node> shortestPathForNodeB = Arrays.asList(nodeA);
List<Node> shortestPathForNodeC = Arrays.asList(nodeA);
List<Node> shortestPathForNodeD = Arrays.asList(nodeA, nodeB);
List<Node> shortestPathForNodeE = Arrays.asList(nodeA, nodeB, nodeD);
List<Node> shortestPathForNodeF = Arrays.asList(nodeA, nodeB, nodeD);
for (Node node : graph.getNodes()) {
switch (node.getName()) {
case "B":
assertTrue(node.getShortestPath().equals(shortestPathForNodeB));
break;
case "C":
assertTrue(node.getShortestPath().equals(shortestPathForNodeC));
break;
case "D":
assertTrue(node.getShortestPath().equals(shortestPathForNodeD));
break;
case "E":
assertTrue(node.getShortestPath().equals(shortestPathForNodeE));
break;
case "F":
assertTrue(node.getShortestPath().equals(shortestPathForNodeF));
break;
}
}
}
}

15
annotations/annotation-processing/src/main/java/com/baeldung/annotation/processor/BuilderProcessor.java
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@ -27,17 +27,12 @@ public class BuilderProcessor extends AbstractProcessor {
Set<? extends Element> annotatedElements = roundEnv.getElementsAnnotatedWith(annotation);
Map<Boolean, List<Element>> annotatedMethods = annotatedElements.stream()
.collect(Collectors.partitioningBy(element ->
((ExecutableType) element.asType()).getParameterTypes().size() == 1
&& element.getSimpleName().toString().startsWith("set")));
Map<Boolean, List<Element>> annotatedMethods = annotatedElements.stream().collect(Collectors.partitioningBy(element -> ((ExecutableType) element.asType()).getParameterTypes().size() == 1 && element.getSimpleName().toString().startsWith("set")));
List<Element> setters = annotatedMethods.get(true);
List<Element> otherMethods = annotatedMethods.get(false);
otherMethods.forEach(element ->
processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR,
"@BuilderProperty must be applied to a setXxx method with a single argument", element));
otherMethods.forEach(element -> processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@BuilderProperty must be applied to a setXxx method with a single argument", element));
if (setters.isEmpty()) {
continue;
@ -45,11 +40,7 @@ public class BuilderProcessor extends AbstractProcessor {
String className = ((TypeElement) setters.get(0).getEnclosingElement()).getQualifiedName().toString();
Map<String, String> setterMap = setters.stream().collect(Collectors.toMap(
setter -> setter.getSimpleName().toString(),
setter -> ((ExecutableType) setter.asType())
.getParameterTypes().get(0).toString()
));
Map<String, String> setterMap = setters.stream().collect(Collectors.toMap(setter -> setter.getSimpleName().toString(), setter -> ((ExecutableType) setter.asType()).getParameterTypes().get(0).toString()));
try {
writeBuilderFile(className, setterMap);

5
annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderTest.java
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@ -9,10 +9,7 @@ public class PersonBuilderTest {
@Test
public void whenBuildPersonWithBuilder_thenObjectHasPropertyValues() {
Person person = new PersonBuilder()
.setAge(25)
.setName("John")
.build();
Person person = new PersonBuilder().setAge(25).setName("John").build();
assertEquals(25, person.getAge());
assertEquals("John", person.getName());

3
annotations/pom.xml
View File

@ -1,6 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>parent-modules</artifactId>

3
apache-fop/pom.xml
View File

@ -1,4 +1,5 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-fop</artifactId>

3
apache-poi/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant Articles:
- [Microsoft Word Processing in Java with Apache POI](http://www.baeldung.com/java-microsoft-word-with-apache-poi)
- [Working with Microsoft Excel in Java](http://www.baeldung.com/java-microsoft-excel)

6
apache-poi/pom.xml
View File

@ -9,6 +9,7 @@
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<junit.version>4.12</junit.version>
<poi.version>3.15</poi.version>
<jexcel.version>1.0.6</jexcel.version>
</properties>
<build>
@ -37,5 +38,10 @@
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.jxls</groupId>
<artifactId>jxls-jexcel</artifactId>
<version>${jexcel.version}</version>
</dependency>
</dependencies>
</project>

74
apache-poi/src/main/java/com/baeldung/jexcel/JExcelHelper.java Normal file
View File

@ -0,0 +1,74 @@
package com.baeldung.jexcel;
import jxl.*;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
import jxl.read.biff.BiffException;
import java.io.File;
import java.io.IOException;
import jxl.write.*;
import jxl.write.Number;
import jxl.format.Colour;
public class JExcelHelper {
public Map<Integer, List<String>> readJExcel(String fileLocation) throws IOException, BiffException {
Map<Integer, List<String>> data = new HashMap<>();
Workbook workbook = Workbook.getWorkbook(new File(fileLocation));
Sheet sheet = workbook.getSheet(0);
int rows = sheet.getRows();
int columns = sheet.getColumns();
for (int i = 0; i < rows; i++) {
data.put(i, new ArrayList<String>());
for (int j = 0; j < columns; j++) {
data.get(i).add(sheet.getCell(j, i).getContents());
}
}
return data;
}
public void writeJExcel() throws IOException, WriteException {
WritableWorkbook workbook = null;
try {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
String fileLocation = path.substring(0, path.length() - 1) + "temp.xls";
workbook = Workbook.createWorkbook(new File(fileLocation));
WritableSheet sheet = workbook.createSheet("Sheet 1", 0);
WritableCellFormat headerFormat = new WritableCellFormat();
WritableFont font = new WritableFont(WritableFont.ARIAL, 16, WritableFont.BOLD);
headerFormat.setFont(font);
headerFormat.setBackground(Colour.LIGHT_BLUE);
headerFormat.setWrap(true);
Label headerLabel = new Label(0, 0, "Name", headerFormat);
sheet.setColumnView(0, 60);
sheet.addCell(headerLabel);
headerLabel = new Label(1, 0, "Age", headerFormat);
sheet.setColumnView(0, 40);
sheet.addCell(headerLabel);
WritableCellFormat cellFormat = new WritableCellFormat();
cellFormat.setWrap(true);
Label cellLabel = new Label(0, 2, "John Smith", cellFormat);
sheet.addCell(cellLabel);
Number cellNumber = new Number(1, 2, 20, cellFormat);
sheet.addCell(cellNumber);
workbook.write();
} finally {
if (workbook != null) {
workbook.close();
}
}
}
}

128
apache-poi/src/main/java/com/baeldung/poi/excel/ExcelPOIHelper.java Normal file
View File

@ -0,0 +1,128 @@
package com.baeldung.poi.excel;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.FillPatternType;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
public class ExcelPOIHelper {
public Map<Integer, List<String>> readExcel(String fileLocation) throws IOException {
Map<Integer, List<String>> data = new HashMap<>();
FileInputStream file = new FileInputStream(new File(fileLocation));
Workbook workbook = new XSSFWorkbook(file);
Sheet sheet = workbook.getSheetAt(0);
int i = 0;
for (Row row : sheet) {
data.put(i, new ArrayList<String>());
for (Cell cell : row) {
switch (cell.getCellTypeEnum()) {
case STRING:
data.get(i)
.add(cell.getRichStringCellValue()
.getString());
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
data.get(i)
.add(cell.getDateCellValue() + "");
} else {
data.get(i)
.add((int)cell.getNumericCellValue() + "");
}
break;
case BOOLEAN:
data.get(i)
.add(cell.getBooleanCellValue() + "");
break;
case FORMULA:
data.get(i)
.add(cell.getCellFormula() + "");
break;
default:
data.get(i)
.add(" ");
}
}
i++;
}
if (workbook != null){
workbook.close();
}
return data;
}
public void writeExcel() throws IOException {
Workbook workbook = new XSSFWorkbook();
try {
Sheet sheet = workbook.createSheet("Persons");
sheet.setColumnWidth(0, 6000);
sheet.setColumnWidth(1, 4000);
Row header = sheet.createRow(0);
CellStyle headerStyle = workbook.createCellStyle();
headerStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());
headerStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
XSSFFont font = ((XSSFWorkbook) workbook).createFont();
font.setFontName("Arial");
font.setFontHeightInPoints((short) 16);
font.setBold(true);
headerStyle.setFont(font);
Cell headerCell = header.createCell(0);
headerCell.setCellValue("Name");
headerCell.setCellStyle(headerStyle);
headerCell = header.createCell(1);
headerCell.setCellValue("Age");
headerCell.setCellStyle(headerStyle);
CellStyle style = workbook.createCellStyle();
style.setWrapText(true);
Row row = sheet.createRow(2);
Cell cell = row.createCell(0);
cell.setCellValue("John Smith");
cell.setCellStyle(style);
cell = row.createCell(1);
cell.setCellValue(20);
cell.setCellStyle(style);
File currDir = new File(".");
String path = currDir.getAbsolutePath();
String fileLocation = path.substring(0, path.length() - 1) + "temp.xlsx";
FileOutputStream outputStream = new FileOutputStream(fileLocation);
workbook.write(outputStream);
} finally {
if (workbook != null) {
workbook.close();
}
}
}
}

10
apache-poi/src/main/java/com/baeldung/poi/word/WordDocument.java
View File

@ -1,5 +1,8 @@
package com.baeldung.poi.word;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.*;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URISyntaxException;
@ -9,13 +12,6 @@ import java.nio.file.Paths;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.usermodel.ParagraphAlignment;
import org.apache.poi.xwpf.usermodel.UnderlinePatterns;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
public class WordDocument {
public static String logo = "logo-leaf.png";
public static String paragraph1 = "poi-word-para1.txt";

56
apache-poi/src/test/java/com/baeldung/jexcel/JExcelTest.java Normal file
View File

@ -0,0 +1,56 @@
package com.baeldung.jexcel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import jxl.read.biff.BiffException;
import java.util.Map;
import java.util.ArrayList;
import java.util.List;
import com.baeldung.jexcel.JExcelHelper;
import jxl.write.WriteException;
import jxl.read.biff.BiffException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.junit.Before;
public class JExcelTest {
private JExcelHelper jExcelHelper;
private static String FILE_NAME = "temp.xls";
private String fileLocation;
@Before
public void generateExcelFile() throws IOException, WriteException {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + FILE_NAME;
jExcelHelper = new JExcelHelper();
jExcelHelper.writeJExcel();
}
@Test
public void whenParsingJExcelFile_thenCorrect() throws IOException, BiffException {
Map<Integer, List<String>> data = jExcelHelper.readJExcel(fileLocation);
assertEquals("Name", data.get(0)
.get(0));
assertEquals("Age", data.get(0)
.get(1));
assertEquals("John Smith", data.get(2)
.get(0));
assertEquals("20", data.get(2)
.get(1));
}
}

53
apache-poi/src/test/java/com/baeldung/poi/excel/ExcelTest.java Normal file
View File

@ -0,0 +1,53 @@
package com.baeldung.poi.excel;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import jxl.read.biff.BiffException;
import java.util.Map;
import java.util.ArrayList;
import java.util.List;
import com.baeldung.poi.excel.ExcelPOIHelper;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import org.junit.Before;
public class ExcelTest {
private ExcelPOIHelper excelPOIHelper;
private static String FILE_NAME = "temp.xlsx";
private String fileLocation;
@Before
public void generateExcelFile() throws IOException {
File currDir = new File(".");
String path = currDir.getAbsolutePath();
fileLocation = path.substring(0, path.length() - 1) + FILE_NAME;
excelPOIHelper = new ExcelPOIHelper();
excelPOIHelper.writeExcel();
}
@Test
public void whenParsingPOIExcelFile_thenCorrect() throws IOException {
Map<Integer, List<String>> data = excelPOIHelper.readExcel(fileLocation);
assertEquals("Name", data.get(0)
.get(0));
assertEquals("Age", data.get(0)
.get(1));
assertEquals("John Smith", data.get(1)
.get(0));
assertEquals("20", data.get(1)
.get(1));
}
}

BIN
apache-poi/temp.xls Normal file
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Binary file not shown.

BIN
apache-poi/temp.xlsx Normal file
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Binary file not shown.

579
apache-thrift/generated/com/baeldung/thrift/impl/CrossPlatformResource.java Normal file
View File

@ -0,0 +1,579 @@
/**
* Autogenerated by Thrift Compiler (0.10.0)
*
* DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
* @generated
*/
package com.baeldung.thrift.impl;
@SuppressWarnings({"cast", "rawtypes", "serial", "unchecked", "unused"})
@javax.annotation.Generated(value = "Autogenerated by Thrift Compiler (0.10.0)", date = "2017-02-01")
public class CrossPlatformResource implements org.apache.thrift.TBase<CrossPlatformResource, CrossPlatformResource._Fields>, java.io.Serializable, Cloneable, Comparable<CrossPlatformResource> {
private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("CrossPlatformResource");
private static final org.apache.thrift.protocol.TField ID_FIELD_DESC = new org.apache.thrift.protocol.TField("id", org.apache.thrift.protocol.TType.I32, (short)1);
private static final org.apache.thrift.protocol.TField NAME_FIELD_DESC = new org.apache.thrift.protocol.TField("name", org.apache.thrift.protocol.TType.STRING, (short)2);
private static final org.apache.thrift.protocol.TField SALUTATION_FIELD_DESC = new org.apache.thrift.protocol.TField("salutation", org.apache.thrift.protocol.TType.STRING, (short)3);
private static final org.apache.thrift.scheme.SchemeFactory STANDARD_SCHEME_FACTORY = new CrossPlatformResourceStandardSchemeFactory();
private static final org.apache.thrift.scheme.SchemeFactory TUPLE_SCHEME_FACTORY = new CrossPlatformResourceTupleSchemeFactory();
public int id; // required
public java.lang.String name; // required
public java.lang.String salutation; // optional
/** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
public enum _Fields implements org.apache.thrift.TFieldIdEnum {
ID((short)1, "id"),
NAME((short)2, "name"),
SALUTATION((short)3, "salutation");
private static final java.util.Map<java.lang.String, _Fields> byName = new java.util.HashMap<java.lang.String, _Fields>();
static {
for (_Fields field : java.util.EnumSet.allOf(_Fields.class)) {
byName.put(field.getFieldName(), field);
}
}
/**
* Find the _Fields constant that matches fieldId, or null if its not found.
*/
public static _Fields findByThriftId(int fieldId) {
switch(fieldId) {
case 1: // ID
return ID;
case 2: // NAME
return NAME;
case 3: // SALUTATION
return SALUTATION;
default:
return null;
}
}
/**
* Find the _Fields constant that matches fieldId, throwing an exception
* if it is not found.
*/
public static _Fields findByThriftIdOrThrow(int fieldId) {
_Fields fields = findByThriftId(fieldId);
if (fields == null) throw new java.lang.IllegalArgumentException("Field " + fieldId + " doesn't exist!");
return fields;
}
/**
* Find the _Fields constant that matches name, or null if its not found.
*/
public static _Fields findByName(java.lang.String name) {
return byName.get(name);
}
private final short _thriftId;
private final java.lang.String _fieldName;
_Fields(short thriftId, java.lang.String fieldName) {
_thriftId = thriftId;
_fieldName = fieldName;
}
public short getThriftFieldId() {
return _thriftId;
}
public java.lang.String getFieldName() {
return _fieldName;
}
}
// isset id assignments
private static final int __ID_ISSET_ID = 0;
private byte __isset_bitfield = 0;
private static final _Fields optionals[] = {_Fields.SALUTATION};
public static final java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
static {
java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new java.util.EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
tmpMap.put(_Fields.ID, new org.apache.thrift.meta_data.FieldMetaData("id", org.apache.thrift.TFieldRequirementType.DEFAULT,
new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.I32)));
tmpMap.put(_Fields.NAME, new org.apache.thrift.meta_data.FieldMetaData("name", org.apache.thrift.TFieldRequirementType.DEFAULT,
new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
tmpMap.put(_Fields.SALUTATION, new org.apache.thrift.meta_data.FieldMetaData("salutation", org.apache.thrift.TFieldRequirementType.OPTIONAL,
new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
metaDataMap = java.util.Collections.unmodifiableMap(tmpMap);
org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(CrossPlatformResource.class, metaDataMap);
}
public CrossPlatformResource() {
}
public CrossPlatformResource(
int id,
java.lang.String name)
{
this();
this.id = id;
setIdIsSet(true);
this.name = name;
}
/**
* Performs a deep copy on <i>other</i>.
*/
public CrossPlatformResource(CrossPlatformResource other) {
__isset_bitfield = other.__isset_bitfield;
this.id = other.id;
if (other.isSetName()) {
this.name = other.name;
}
if (other.isSetSalutation()) {
this.salutation = other.salutation;
}
}
public CrossPlatformResource deepCopy() {
return new CrossPlatformResource(this);
}
@Override
public void clear() {
setIdIsSet(false);
this.id = 0;
this.name = null;
this.salutation = null;
}
public int getId() {
return this.id;
}
public CrossPlatformResource setId(int id) {
this.id = id;
setIdIsSet(true);
return this;
}
public void unsetId() {
__isset_bitfield = org.apache.thrift.EncodingUtils.clearBit(__isset_bitfield, __ID_ISSET_ID);
}
/** Returns true if field id is set (has been assigned a value) and false otherwise */
public boolean isSetId() {
return org.apache.thrift.EncodingUtils.testBit(__isset_bitfield, __ID_ISSET_ID);
}
public void setIdIsSet(boolean value) {
__isset_bitfield = org.apache.thrift.EncodingUtils.setBit(__isset_bitfield, __ID_ISSET_ID, value);
}
public java.lang.String getName() {
return this.name;
}
public CrossPlatformResource setName(java.lang.String name) {
this.name = name;
return this;
}
public void unsetName() {
this.name = null;
}
/** Returns true if field name is set (has been assigned a value) and false otherwise */
public boolean isSetName() {
return this.name != null;
}
public void setNameIsSet(boolean value) {
if (!value) {
this.name = null;
}
}
public java.lang.String getSalutation() {
return this.salutation;
}
public CrossPlatformResource setSalutation(java.lang.String salutation) {
this.salutation = salutation;
return this;
}
public void unsetSalutation() {
this.salutation = null;
}
/** Returns true if field salutation is set (has been assigned a value) and false otherwise */
public boolean isSetSalutation() {
return this.salutation != null;
}
public void setSalutationIsSet(boolean value) {
if (!value) {
this.salutation = null;
}
}
public void setFieldValue(_Fields field, java.lang.Object value) {
switch (field) {
case ID:
if (value == null) {
unsetId();
} else {
setId((java.lang.Integer)value);
}
break;
case NAME:
if (value == null) {
unsetName();
} else {
setName((java.lang.String)value);
}
break;
case SALUTATION:
if (value == null) {
unsetSalutation();
} else {
setSalutation((java.lang.String)value);
}
break;
}
}
public java.lang.Object getFieldValue(_Fields field) {
switch (field) {
case ID:
return getId();
case NAME:
return getName();
case SALUTATION:
return getSalutation();
}
throw new java.lang.IllegalStateException();
}
/** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
public boolean isSet(_Fields field) {
if (field == null) {
throw new java.lang.IllegalArgumentException();
}
switch (field) {
case ID:
return isSetId();
case NAME:
return isSetName();
case SALUTATION:
return isSetSalutation();
}
throw new java.lang.IllegalStateException();
}
@Override
public boolean equals(java.lang.Object that) {
if (that == null)
return false;
if (that instanceof CrossPlatformResource)
return this.equals((CrossPlatformResource)that);
return false;
}
public boolean equals(CrossPlatformResource that) {
if (that == null)
return false;
if (this == that)
return true;
boolean this_present_id = true;
boolean that_present_id = true;
if (this_present_id || that_present_id) {
if (!(this_present_id && that_present_id))
return false;
if (this.id != that.id)
return false;
}
boolean this_present_name = true && this.isSetName();
boolean that_present_name = true && that.isSetName();
if (this_present_name || that_present_name) {
if (!(this_present_name && that_present_name))
return false;
if (!this.name.equals(that.name))
return false;
}
boolean this_present_salutation = true && this.isSetSalutation();
boolean that_present_salutation = true && that.isSetSalutation();
if (this_present_salutation || that_present_salutation) {
if (!(this_present_salutation && that_present_salutation))
return false;
if (!this.salutation.equals(that.salutation))
return false;
}
return true;
}
@Override
public int hashCode() {
int hashCode = 1;
hashCode = hashCode * 8191 + id;
hashCode = hashCode * 8191 + ((isSetName()) ? 131071 : 524287);
if (isSetName())
hashCode = hashCode * 8191 + name.hashCode();
hashCode = hashCode * 8191 + ((isSetSalutation()) ? 131071 : 524287);
if (isSetSalutation())
hashCode = hashCode * 8191 + salutation.hashCode();
return hashCode;
}
@Override
public int compareTo(CrossPlatformResource other) {
if (!getClass().equals(other.getClass())) {
return getClass().getName().compareTo(other.getClass().getName());
}
int lastComparison = 0;
lastComparison = java.lang.Boolean.valueOf(isSetId()).compareTo(other.isSetId());
if (lastComparison != 0) {
return lastComparison;
}
if (isSetId()) {
lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.id, other.id);
if (lastComparison != 0) {
return lastComparison;
}
}
lastComparison = java.lang.Boolean.valueOf(isSetName()).compareTo(other.isSetName());
if (lastComparison != 0) {
return lastComparison;
}
if (isSetName()) {
lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.name, other.name);
if (lastComparison != 0) {
return lastComparison;
}
}
lastComparison = java.lang.Boolean.valueOf(isSetSalutation()).compareTo(other.isSetSalutation());
if (lastComparison != 0) {
return lastComparison;
}
if (isSetSalutation()) {
lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.salutation, other.salutation);
if (lastComparison != 0) {
return lastComparison;
}
}
return 0;
}
public _Fields fieldForId(int fieldId) {
return _Fields.findByThriftId(fieldId);
}
public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
scheme(iprot).read(iprot, this);
}
public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
scheme(oprot).write(oprot, this);
}
@Override
public java.lang.String toString() {
java.lang.StringBuilder sb = new java.lang.StringBuilder("CrossPlatformResource(");
boolean first = true;
sb.append("id:");
sb.append(this.id);
first = false;
if (!first) sb.append(", ");
sb.append("name:");
if (this.name == null) {
sb.append("null");
} else {
sb.append(this.name);
}
first = false;
if (isSetSalutation()) {
if (!first) sb.append(", ");
sb.append("salutation:");
if (this.salutation == null) {
sb.append("null");
} else {
sb.append(this.salutation);
}
first = false;
}
sb.append(")");
return sb.toString();
}
public void validate() throws org.apache.thrift.TException {
// check for required fields
// check for sub-struct validity
}
private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
try {
write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
} catch (org.apache.thrift.TException te) {
throw new java.io.IOException(te);
}
}
private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException {
try {
// it doesn't seem like you should have to do this, but java serialization is wacky, and doesn't call the default constructor.
__isset_bitfield = 0;
read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
} catch (org.apache.thrift.TException te) {
throw new java.io.IOException(te);
}
}
private static class CrossPlatformResourceStandardSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
public CrossPlatformResourceStandardScheme getScheme() {
return new CrossPlatformResourceStandardScheme();
}
}
private static class CrossPlatformResourceStandardScheme extends org.apache.thrift.scheme.StandardScheme<CrossPlatformResource> {
public void read(org.apache.thrift.protocol.TProtocol iprot, CrossPlatformResource struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TField schemeField;
iprot.readStructBegin();
while (true)
{
schemeField = iprot.readFieldBegin();
if (schemeField.type == org.apache.thrift.protocol.TType.STOP) {
break;
}
switch (schemeField.id) {
case 1: // ID
if (schemeField.type == org.apache.thrift.protocol.TType.I32) {
struct.id = iprot.readI32();
struct.setIdIsSet(true);
} else {
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
break;
case 2: // NAME
if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
struct.name = iprot.readString();
struct.setNameIsSet(true);
} else {
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
break;
case 3: // SALUTATION
if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
struct.salutation = iprot.readString();
struct.setSalutationIsSet(true);
} else {
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
break;
default:
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
iprot.readFieldEnd();
}
iprot.readStructEnd();
// check for required fields of primitive type, which can't be checked in the validate method
struct.validate();
}
public void write(org.apache.thrift.protocol.TProtocol oprot, CrossPlatformResource struct) throws org.apache.thrift.TException {
struct.validate();
oprot.writeStructBegin(STRUCT_DESC);
oprot.writeFieldBegin(ID_FIELD_DESC);
oprot.writeI32(struct.id);
oprot.writeFieldEnd();
if (struct.name != null) {
oprot.writeFieldBegin(NAME_FIELD_DESC);
oprot.writeString(struct.name);
oprot.writeFieldEnd();
}
if (struct.salutation != null) {
if (struct.isSetSalutation()) {
oprot.writeFieldBegin(SALUTATION_FIELD_DESC);
oprot.writeString(struct.salutation);
oprot.writeFieldEnd();
}
}
oprot.writeFieldStop();
oprot.writeStructEnd();
}
}
private static class CrossPlatformResourceTupleSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
public CrossPlatformResourceTupleScheme getScheme() {
return new CrossPlatformResourceTupleScheme();
}
}
private static class CrossPlatformResourceTupleScheme extends org.apache.thrift.scheme.TupleScheme<CrossPlatformResource> {
@Override
public void write(org.apache.thrift.protocol.TProtocol prot, CrossPlatformResource struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TTupleProtocol oprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
java.util.BitSet optionals = new java.util.BitSet();
if (struct.isSetId()) {
optionals.set(0);
}
if (struct.isSetName()) {
optionals.set(1);
}
if (struct.isSetSalutation()) {
optionals.set(2);
}
oprot.writeBitSet(optionals, 3);
if (struct.isSetId()) {
oprot.writeI32(struct.id);
}
if (struct.isSetName()) {
oprot.writeString(struct.name);
}
if (struct.isSetSalutation()) {
oprot.writeString(struct.salutation);
}
}
@Override
public void read(org.apache.thrift.protocol.TProtocol prot, CrossPlatformResource struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
java.util.BitSet incoming = iprot.readBitSet(3);
if (incoming.get(0)) {
struct.id = iprot.readI32();
struct.setIdIsSet(true);
}
if (incoming.get(1)) {
struct.name = iprot.readString();
struct.setNameIsSet(true);
}
if (incoming.get(2)) {
struct.salutation = iprot.readString();
struct.setSalutationIsSet(true);
}
}
}
private static <S extends org.apache.thrift.scheme.IScheme> S scheme(org.apache.thrift.protocol.TProtocol proto) {
return (org.apache.thrift.scheme.StandardScheme.class.equals(proto.getScheme()) ? STANDARD_SCHEME_FACTORY : TUPLE_SCHEME_FACTORY).getScheme();
}
}

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apache-thrift/generated/com/baeldung/thrift/impl/CrossPlatformService.java Normal file
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472
apache-thrift/generated/com/baeldung/thrift/impl/InvalidOperationException.java Normal file
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@ -0,0 +1,472 @@
/**
* Autogenerated by Thrift Compiler (0.10.0)
*
* DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING
* @generated
*/
package com.baeldung.thrift.impl;
@SuppressWarnings({"cast", "rawtypes", "serial", "unchecked", "unused"})
@javax.annotation.Generated(value = "Autogenerated by Thrift Compiler (0.10.0)", date = "2017-02-01")
public class InvalidOperationException extends org.apache.thrift.TException implements org.apache.thrift.TBase<InvalidOperationException, InvalidOperationException._Fields>, java.io.Serializable, Cloneable, Comparable<InvalidOperationException> {
private static final org.apache.thrift.protocol.TStruct STRUCT_DESC = new org.apache.thrift.protocol.TStruct("InvalidOperationException");
private static final org.apache.thrift.protocol.TField CODE_FIELD_DESC = new org.apache.thrift.protocol.TField("code", org.apache.thrift.protocol.TType.I32, (short)1);
private static final org.apache.thrift.protocol.TField DESCRIPTION_FIELD_DESC = new org.apache.thrift.protocol.TField("description", org.apache.thrift.protocol.TType.STRING, (short)2);
private static final org.apache.thrift.scheme.SchemeFactory STANDARD_SCHEME_FACTORY = new InvalidOperationExceptionStandardSchemeFactory();
private static final org.apache.thrift.scheme.SchemeFactory TUPLE_SCHEME_FACTORY = new InvalidOperationExceptionTupleSchemeFactory();
public int code; // required
public java.lang.String description; // required
/** The set of fields this struct contains, along with convenience methods for finding and manipulating them. */
public enum _Fields implements org.apache.thrift.TFieldIdEnum {
CODE((short)1, "code"),
DESCRIPTION((short)2, "description");
private static final java.util.Map<java.lang.String, _Fields> byName = new java.util.HashMap<java.lang.String, _Fields>();
static {
for (_Fields field : java.util.EnumSet.allOf(_Fields.class)) {
byName.put(field.getFieldName(), field);
}
}
/**
* Find the _Fields constant that matches fieldId, or null if its not found.
*/
public static _Fields findByThriftId(int fieldId) {
switch(fieldId) {
case 1: // CODE
return CODE;
case 2: // DESCRIPTION
return DESCRIPTION;
default:
return null;
}
}
/**
* Find the _Fields constant that matches fieldId, throwing an exception
* if it is not found.
*/
public static _Fields findByThriftIdOrThrow(int fieldId) {
_Fields fields = findByThriftId(fieldId);
if (fields == null) throw new java.lang.IllegalArgumentException("Field " + fieldId + " doesn't exist!");
return fields;
}
/**
* Find the _Fields constant that matches name, or null if its not found.
*/
public static _Fields findByName(java.lang.String name) {
return byName.get(name);
}
private final short _thriftId;
private final java.lang.String _fieldName;
_Fields(short thriftId, java.lang.String fieldName) {
_thriftId = thriftId;
_fieldName = fieldName;
}
public short getThriftFieldId() {
return _thriftId;
}
public java.lang.String getFieldName() {
return _fieldName;
}
}
// isset id assignments
private static final int __CODE_ISSET_ID = 0;
private byte __isset_bitfield = 0;
public static final java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> metaDataMap;
static {
java.util.Map<_Fields, org.apache.thrift.meta_data.FieldMetaData> tmpMap = new java.util.EnumMap<_Fields, org.apache.thrift.meta_data.FieldMetaData>(_Fields.class);
tmpMap.put(_Fields.CODE, new org.apache.thrift.meta_data.FieldMetaData("code", org.apache.thrift.TFieldRequirementType.DEFAULT,
new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.I32)));
tmpMap.put(_Fields.DESCRIPTION, new org.apache.thrift.meta_data.FieldMetaData("description", org.apache.thrift.TFieldRequirementType.DEFAULT,
new org.apache.thrift.meta_data.FieldValueMetaData(org.apache.thrift.protocol.TType.STRING)));
metaDataMap = java.util.Collections.unmodifiableMap(tmpMap);
org.apache.thrift.meta_data.FieldMetaData.addStructMetaDataMap(InvalidOperationException.class, metaDataMap);
}
public InvalidOperationException() {
}
public InvalidOperationException(
int code,
java.lang.String description)
{
this();
this.code = code;
setCodeIsSet(true);
this.description = description;
}
/**
* Performs a deep copy on <i>other</i>.
*/
public InvalidOperationException(InvalidOperationException other) {
__isset_bitfield = other.__isset_bitfield;
this.code = other.code;
if (other.isSetDescription()) {
this.description = other.description;
}
}
public InvalidOperationException deepCopy() {
return new InvalidOperationException(this);
}
@Override
public void clear() {
setCodeIsSet(false);
this.code = 0;
this.description = null;
}
public int getCode() {
return this.code;
}
public InvalidOperationException setCode(int code) {
this.code = code;
setCodeIsSet(true);
return this;
}
public void unsetCode() {
__isset_bitfield = org.apache.thrift.EncodingUtils.clearBit(__isset_bitfield, __CODE_ISSET_ID);
}
/** Returns true if field code is set (has been assigned a value) and false otherwise */
public boolean isSetCode() {
return org.apache.thrift.EncodingUtils.testBit(__isset_bitfield, __CODE_ISSET_ID);
}
public void setCodeIsSet(boolean value) {
__isset_bitfield = org.apache.thrift.EncodingUtils.setBit(__isset_bitfield, __CODE_ISSET_ID, value);
}
public java.lang.String getDescription() {
return this.description;
}
public InvalidOperationException setDescription(java.lang.String description) {
this.description = description;
return this;
}
public void unsetDescription() {
this.description = null;
}
/** Returns true if field description is set (has been assigned a value) and false otherwise */
public boolean isSetDescription() {
return this.description != null;
}
public void setDescriptionIsSet(boolean value) {
if (!value) {
this.description = null;
}
}
public void setFieldValue(_Fields field, java.lang.Object value) {
switch (field) {
case CODE:
if (value == null) {
unsetCode();
} else {
setCode((java.lang.Integer)value);
}
break;
case DESCRIPTION:
if (value == null) {
unsetDescription();
} else {
setDescription((java.lang.String)value);
}
break;
}
}
public java.lang.Object getFieldValue(_Fields field) {
switch (field) {
case CODE:
return getCode();
case DESCRIPTION:
return getDescription();
}
throw new java.lang.IllegalStateException();
}
/** Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise */
public boolean isSet(_Fields field) {
if (field == null) {
throw new java.lang.IllegalArgumentException();
}
switch (field) {
case CODE:
return isSetCode();
case DESCRIPTION:
return isSetDescription();
}
throw new java.lang.IllegalStateException();
}
@Override
public boolean equals(java.lang.Object that) {
if (that == null)
return false;
if (that instanceof InvalidOperationException)
return this.equals((InvalidOperationException)that);
return false;
}
public boolean equals(InvalidOperationException that) {
if (that == null)
return false;
if (this == that)
return true;
boolean this_present_code = true;
boolean that_present_code = true;
if (this_present_code || that_present_code) {
if (!(this_present_code && that_present_code))
return false;
if (this.code != that.code)
return false;
}
boolean this_present_description = true && this.isSetDescription();
boolean that_present_description = true && that.isSetDescription();
if (this_present_description || that_present_description) {
if (!(this_present_description && that_present_description))
return false;
if (!this.description.equals(that.description))
return false;
}
return true;
}
@Override
public int hashCode() {
int hashCode = 1;
hashCode = hashCode * 8191 + code;
hashCode = hashCode * 8191 + ((isSetDescription()) ? 131071 : 524287);
if (isSetDescription())
hashCode = hashCode * 8191 + description.hashCode();
return hashCode;
}
@Override
public int compareTo(InvalidOperationException other) {
if (!getClass().equals(other.getClass())) {
return getClass().getName().compareTo(other.getClass().getName());
}
int lastComparison = 0;
lastComparison = java.lang.Boolean.valueOf(isSetCode()).compareTo(other.isSetCode());
if (lastComparison != 0) {
return lastComparison;
}
if (isSetCode()) {
lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.code, other.code);
if (lastComparison != 0) {
return lastComparison;
}
}
lastComparison = java.lang.Boolean.valueOf(isSetDescription()).compareTo(other.isSetDescription());
if (lastComparison != 0) {
return lastComparison;
}
if (isSetDescription()) {
lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.description, other.description);
if (lastComparison != 0) {
return lastComparison;
}
}
return 0;
}
public _Fields fieldForId(int fieldId) {
return _Fields.findByThriftId(fieldId);
}
public void read(org.apache.thrift.protocol.TProtocol iprot) throws org.apache.thrift.TException {
scheme(iprot).read(iprot, this);
}
public void write(org.apache.thrift.protocol.TProtocol oprot) throws org.apache.thrift.TException {
scheme(oprot).write(oprot, this);
}
@Override
public java.lang.String toString() {
java.lang.StringBuilder sb = new java.lang.StringBuilder("InvalidOperationException(");
boolean first = true;
sb.append("code:");
sb.append(this.code);
first = false;
if (!first) sb.append(", ");
sb.append("description:");
if (this.description == null) {
sb.append("null");
} else {
sb.append(this.description);
}
first = false;
sb.append(")");
return sb.toString();
}
public void validate() throws org.apache.thrift.TException {
// check for required fields
// check for sub-struct validity
}
private void writeObject(java.io.ObjectOutputStream out) throws java.io.IOException {
try {
write(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(out)));
} catch (org.apache.thrift.TException te) {
throw new java.io.IOException(te);
}
}
private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, java.lang.ClassNotFoundException {
try {
// it doesn't seem like you should have to do this, but java serialization is wacky, and doesn't call the default constructor.
__isset_bitfield = 0;
read(new org.apache.thrift.protocol.TCompactProtocol(new org.apache.thrift.transport.TIOStreamTransport(in)));
} catch (org.apache.thrift.TException te) {
throw new java.io.IOException(te);
}
}
private static class InvalidOperationExceptionStandardSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
public InvalidOperationExceptionStandardScheme getScheme() {
return new InvalidOperationExceptionStandardScheme();
}
}
private static class InvalidOperationExceptionStandardScheme extends org.apache.thrift.scheme.StandardScheme<InvalidOperationException> {
public void read(org.apache.thrift.protocol.TProtocol iprot, InvalidOperationException struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TField schemeField;
iprot.readStructBegin();
while (true)
{
schemeField = iprot.readFieldBegin();
if (schemeField.type == org.apache.thrift.protocol.TType.STOP) {
break;
}
switch (schemeField.id) {
case 1: // CODE
if (schemeField.type == org.apache.thrift.protocol.TType.I32) {
struct.code = iprot.readI32();
struct.setCodeIsSet(true);
} else {
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
break;
case 2: // DESCRIPTION
if (schemeField.type == org.apache.thrift.protocol.TType.STRING) {
struct.description = iprot.readString();
struct.setDescriptionIsSet(true);
} else {
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
break;
default:
org.apache.thrift.protocol.TProtocolUtil.skip(iprot, schemeField.type);
}
iprot.readFieldEnd();
}
iprot.readStructEnd();
// check for required fields of primitive type, which can't be checked in the validate method
struct.validate();
}
public void write(org.apache.thrift.protocol.TProtocol oprot, InvalidOperationException struct) throws org.apache.thrift.TException {
struct.validate();
oprot.writeStructBegin(STRUCT_DESC);
oprot.writeFieldBegin(CODE_FIELD_DESC);
oprot.writeI32(struct.code);
oprot.writeFieldEnd();
if (struct.description != null) {
oprot.writeFieldBegin(DESCRIPTION_FIELD_DESC);
oprot.writeString(struct.description);
oprot.writeFieldEnd();
}
oprot.writeFieldStop();
oprot.writeStructEnd();
}
}
private static class InvalidOperationExceptionTupleSchemeFactory implements org.apache.thrift.scheme.SchemeFactory {
public InvalidOperationExceptionTupleScheme getScheme() {
return new InvalidOperationExceptionTupleScheme();
}
}
private static class InvalidOperationExceptionTupleScheme extends org.apache.thrift.scheme.TupleScheme<InvalidOperationException> {
@Override
public void write(org.apache.thrift.protocol.TProtocol prot, InvalidOperationException struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TTupleProtocol oprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
java.util.BitSet optionals = new java.util.BitSet();
if (struct.isSetCode()) {
optionals.set(0);
}
if (struct.isSetDescription()) {
optionals.set(1);
}
oprot.writeBitSet(optionals, 2);
if (struct.isSetCode()) {
oprot.writeI32(struct.code);
}
if (struct.isSetDescription()) {
oprot.writeString(struct.description);
}
}
@Override
public void read(org.apache.thrift.protocol.TProtocol prot, InvalidOperationException struct) throws org.apache.thrift.TException {
org.apache.thrift.protocol.TTupleProtocol iprot = (org.apache.thrift.protocol.TTupleProtocol) prot;
java.util.BitSet incoming = iprot.readBitSet(2);
if (incoming.get(0)) {
struct.code = iprot.readI32();
struct.setCodeIsSet(true);
}
if (incoming.get(1)) {
struct.description = iprot.readString();
struct.setDescriptionIsSet(true);
}
}
}
private static <S extends org.apache.thrift.scheme.IScheme> S scheme(org.apache.thrift.protocol.TProtocol proto) {
return (org.apache.thrift.scheme.StandardScheme.class.equals(proto.getScheme()) ? STANDARD_SCHEME_FACTORY : TUPLE_SCHEME_FACTORY).getScheme();
}
}

68
apache-thrift/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-thrift</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<java.versin>1.8</java.versin>
<junit.version>4.12</junit.version>
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<thrift.version>0.10.0</thrift.version>
<maven-thrift.version>0.1.11</maven-thrift.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.thrift</groupId>
<artifactId>libthrift</artifactId>
<version>${thrift.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<defaultGoal>install</defaultGoal>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<execution>
<phase>generate-sources</phase>
<goals><goal>add-source</goal></goals>
<configuration>
<sources>
<source>generated</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

11
apache-thrift/src/main/java/com/baeldung/thrift/Application.java Normal file
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package com.baeldung.thrift;
import org.apache.thrift.transport.TTransportException;
public class Application {
public static void main(String[] args) throws TTransportException {
CrossPlatformServiceServer server = new CrossPlatformServiceServer();
server.start();
}
}

41
apache-thrift/src/main/java/com/baeldung/thrift/CrossPlatformServiceClient.java Normal file
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package com.baeldung.thrift;
import com.baeldung.thrift.impl.CrossPlatformService;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
public class CrossPlatformServiceClient {
public boolean ping() {
try {
TTransport transport;
transport = new TSocket("localhost", 9090);
transport.open();
TProtocol protocol = new TBinaryProtocol(transport);
CrossPlatformService.Client client = new CrossPlatformService.Client(protocol);
System.out.print("Calling remote method...");
boolean result = client.ping();
System.out.println("done.");
transport.close();
return result;
} catch (TTransportException e) {
e.printStackTrace();
} catch (TException x) {
x.printStackTrace();
}
return false;
}
}

35
apache-thrift/src/main/java/com/baeldung/thrift/CrossPlatformServiceImpl.java Normal file
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package com.baeldung.thrift;
import com.baeldung.thrift.impl.CrossPlatformResource;
import com.baeldung.thrift.impl.CrossPlatformService;
import com.baeldung.thrift.impl.InvalidOperationException;
import org.apache.thrift.TException;
import java.util.Collections;
import java.util.List;
public class CrossPlatformServiceImpl implements CrossPlatformService.Iface {
@Override
public CrossPlatformResource get(final int id) throws InvalidOperationException, TException {
// add some action
return new CrossPlatformResource();
}
@Override
public void save(final CrossPlatformResource resource) throws InvalidOperationException, TException {
// add some action
}
@Override
public List<CrossPlatformResource> getList() throws InvalidOperationException, TException {
// add some action
return Collections.emptyList();
}
@Override
public boolean ping() throws InvalidOperationException, TException {
return true;
}
}

36
apache-thrift/src/main/java/com/baeldung/thrift/CrossPlatformServiceServer.java Normal file
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package com.baeldung.thrift;
import com.baeldung.thrift.impl.CrossPlatformService;
import org.apache.thrift.server.TServer;
import org.apache.thrift.server.TSimpleServer;
import org.apache.thrift.transport.TServerSocket;
import org.apache.thrift.transport.TServerTransport;
import org.apache.thrift.transport.TTransportException;
public class CrossPlatformServiceServer {
private TServer server;
public void start() throws TTransportException {
TServerTransport serverTransport = new TServerSocket(9090);
server = new TSimpleServer(new TServer.Args(serverTransport)
.processor(new CrossPlatformService.Processor<>(new CrossPlatformServiceImpl())));
System.out.print("Starting the server... ");
server.serve();
System.out.println("done.");
}
public void stop() {
if (server != null && server.isServing()) {
System.out.print("Stopping the server... ");
server.stop();
System.out.println("done.");
}
}
}

24
apache-thrift/src/main/resources/cross-platform-service.thrift Normal file
View File

@ -0,0 +1,24 @@
namespace cpp com.baeldung.thrift.impl
namespace java com.baeldung.thrift.impl
exception InvalidOperationException {
1: i32 code,
2: string description
}
struct CrossPlatformResource {
1: i32 id,
2: string name,
3: optional string salutation
}
service CrossPlatformService {
CrossPlatformResource get(1:i32 id) throws (1:InvalidOperationException e),
void save(1:CrossPlatformResource resource) throws (1:InvalidOperationException e),
list <CrossPlatformResource> getList() throws (1:InvalidOperationException e),
bool ping() throws (1:InvalidOperationException e)
}

40
apache-thrift/src/test/java/com/baeldung/thrift/CrossPlatformServiceTest.java Normal file
View File

@ -0,0 +1,40 @@
package com.baeldung.thrift;
import org.apache.thrift.transport.TTransportException;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class CrossPlatformServiceTest {
private CrossPlatformServiceServer server = new CrossPlatformServiceServer();
@Before
public void setUp() {
new Thread(() -> {
try {
server.start();
} catch (TTransportException e) {
e.printStackTrace();
}
}).start();
try {
// wait for the server start up
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
@After
public void tearDown() {
server.stop();
}
@Test
public void ping() {
CrossPlatformServiceClient client = new CrossPlatformServiceClient();
Assert.assertTrue(client.ping());
}
}

3
aspectj/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant Articles:
- [Intro to AspectJ](http://www.baeldung.com/aspectj)
- [Spring Performance Logging](http://www.baeldung.com/spring-performance-logging)

59
aspectj/pom.xml
View File

@ -45,6 +45,36 @@
<version>${junit.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
<build>
@ -81,18 +111,8 @@
<Xlint>ignore</Xlint>
<encoding>${project.build.sourceEncoding}</encoding>
<!-- Post-compile weaving -->
<!--
<weaveDependencies>
<weaveDependency>
<groupId>org.agroup</groupId>
<artifactId>to-weave</artifactId>
</weaveDependency>
<weaveDependency>
<groupId>org.anothergroup</groupId>
<artifactId>gen</artifactId>
</weaveDependency>
</weaveDependencies>
-->
<!-- <weaveDependencies> <weaveDependency> <groupId>org.agroup</groupId> <artifactId>to-weave</artifactId> </weaveDependency>
<weaveDependency> <groupId>org.anothergroup</groupId> <artifactId>gen</artifactId> </weaveDependency> </weaveDependencies> -->
</configuration>
<executions>
<execution>
@ -104,18 +124,9 @@
</executions>
</plugin>
<!--
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.10</version>
<configuration>
<argLine>-javaagent:"${settings.localRepository}"/org/aspectj/aspectjweaver/${aspectj.version}/aspectjweaver-${aspectj.version}.jar</argLine>
<useSystemClassLoader>true</useSystemClassLoader>
<forkMode>always</forkMode>
</configuration>
</plugin>
-->
<!-- <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.10</version>
<configuration> <argLine>-javaagent:"${settings.localRepository}"/org/aspectj/aspectjweaver/${aspectj.version}/aspectjweaver-${aspectj.version}.jar</argLine>
<useSystemClassLoader>true</useSystemClassLoader> <forkMode>always</forkMode> </configuration> </plugin> -->
</plugins>
</build>

59
aspectj/src/main/java/com/baeldung/performancemonitor/AopConfiguration.java Normal file
View File

@ -0,0 +1,59 @@
package com.baeldung.performancemonitor;
import java.time.LocalDate;
import java.time.Month;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.aop.Advisor;
import org.springframework.aop.aspectj.AspectJExpressionPointcut;
import org.springframework.aop.interceptor.PerformanceMonitorInterceptor;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
@Configuration
@EnableAspectJAutoProxy
public class AopConfiguration {
@Pointcut("execution(public String com.baeldung.performancemonitor.PersonService.getFullName(..))")
public void monitor() { }
@Pointcut("execution(public int com.baeldung.performancemonitor.PersonService.getAge(..))")
public void myMonitor() { }
@Bean
public PerformanceMonitorInterceptor performanceMonitorInterceptor() {
return new PerformanceMonitorInterceptor(true);
}
@Bean
public Advisor performanceMonitorAdvisor() {
AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
pointcut.setExpression("com.baeldung.performancemonitor.AopConfiguration.monitor()");
return new DefaultPointcutAdvisor(pointcut, performanceMonitorInterceptor());
}
@Bean
public Person person(){
return new Person("John","Smith", LocalDate.of(1980, Month.JANUARY, 12));
}
@Bean
public PersonService personService(){
return new PersonService();
}
@Bean
public MyPerformanceMonitorInterceptor myPerformanceMonitorInterceptor() {
return new MyPerformanceMonitorInterceptor(true);
}
@Bean
public Advisor myPerformanceMonitorAdvisor() {
AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
pointcut.setExpression("com.baeldung.performancemonitor.AopConfiguration.myMonitor()");
return new DefaultPointcutAdvisor(pointcut, myPerformanceMonitorInterceptor());
}
}

39
aspectj/src/main/java/com/baeldung/performancemonitor/MyPerformanceMonitorInterceptor.java Normal file
View File

@ -0,0 +1,39 @@
package com.baeldung.performancemonitor;
import java.util.Date;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.springframework.aop.interceptor.AbstractMonitoringInterceptor;
public class MyPerformanceMonitorInterceptor extends AbstractMonitoringInterceptor {
public MyPerformanceMonitorInterceptor() {
}
public MyPerformanceMonitorInterceptor(boolean useDynamicLogger) {
setUseDynamicLogger(useDynamicLogger);
}
@Override
protected Object invokeUnderTrace(MethodInvocation invocation, Log log) throws Throwable {
String name = createInvocationTraceName(invocation);
long start = System.currentTimeMillis();
log.info("Method "+name+" execution started at:"+new Date());
try {
return invocation.proceed();
}
finally {
long end = System.currentTimeMillis();
long time = end - start;
log.info("Method "+name+" execution lasted:"+time+" ms");
log.info("Method "+name+" execution ended at:"+new Date());
if (time > 10){
log.warn("Method execution longer than 10 ms!");
}
}
}
}

16
aspectj/src/main/java/com/baeldung/performancemonitor/PerfomanceApp.java Normal file
View File

@ -0,0 +1,16 @@
package com.baeldung.performancemonitor;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class PerfomanceApp {
public static void main(String[] args) {
ApplicationContext context = new AnnotationConfigApplicationContext(AopConfiguration.class);
Person person = (Person) context.getBean("person");
PersonService personService = (PersonService) context.getBean("personService");
System.out.println("Name is:"+personService.getFullName(person));
System.out.println("Age is:"+personService.getAge(person));
}
}

42
aspectj/src/main/java/com/baeldung/performancemonitor/Person.java Normal file
View File

@ -0,0 +1,42 @@
package com.baeldung.performancemonitor;
import java.time.LocalDate;
public class Person {
private String lastName;
private String firstName;
private LocalDate dateOfBirth;
public Person() {
}
public Person(String firstName, String lastName, LocalDate dateOfBirth) {
this.firstName = firstName;
this.lastName = lastName;
this.dateOfBirth = dateOfBirth;
}
public LocalDate getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(LocalDate dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
}

17
aspectj/src/main/java/com/baeldung/performancemonitor/PersonService.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung.performancemonitor;
import java.time.LocalDate;
import java.time.Period;
public class PersonService {
public String getFullName(Person person){
return person.getLastName()+" "+person.getFirstName();
}
public int getAge(Person person){
Period p = Period.between(person.getDateOfBirth(), LocalDate.now());
return p.getYears();
}
}

10
aspectj/src/main/resources/log4j.properties Normal file
View File

@ -0,0 +1,10 @@
log4j.rootLogger=TRACE, stdout
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.logger.org.springframework.aop.interceptor.PerformanceMonitorInterceptor=TRACE, stdout
log4j.logger.com.baeldung.performancemonitor.MyPerformanceMonitorInterceptor=INFO, stdout

36
assertj/src/test/java/com/baeldung/assertj/introduction/AssertJCoreTest.java
View File

@ -38,8 +38,7 @@ public class AssertJCoreTest {
public void whenCheckingForElement_thenContains() throws Exception {
List<String> list = Arrays.asList("1", "2", "3");
assertThat(list)
.contains("1");
assertThat(list).contains("1");
}
@Test
@ -50,12 +49,7 @@ public class AssertJCoreTest {
assertThat(list).startsWith("1");
assertThat(list).doesNotContainNull();
assertThat(list)
.isNotEmpty()
.contains("1")
.startsWith("1")
.doesNotContainNull()
.containsSequence("2", "3");
assertThat(list).isNotEmpty().contains("1").startsWith("1").doesNotContainNull().containsSequence("2", "3");
}
@Test
@ -67,11 +61,7 @@ public class AssertJCoreTest {
public void whenCheckingCharacter_thenIsUnicode() throws Exception {
char someCharacter = 'c';
assertThat(someCharacter)
.isNotEqualTo('a')
.inUnicode()
.isGreaterThanOrEqualTo('b')
.isLowerCase();
assertThat(someCharacter).isNotEqualTo('a').inUnicode().isGreaterThanOrEqualTo('b').isLowerCase();
}
@Test
@ -94,11 +84,7 @@ public class AssertJCoreTest {
final File someFile = File.createTempFile("aaa", "bbb");
someFile.deleteOnExit();
assertThat(someFile)
.exists()
.isFile()
.canRead()
.canWrite();
assertThat(someFile).exists().isFile().canRead().canWrite();
}
@Test
@ -113,20 +99,14 @@ public class AssertJCoreTest {
public void whenGivenMap_then() throws Exception {
Map<Integer, String> map = Maps.newHashMap(2, "a");
assertThat(map)
.isNotEmpty()
.containsKey(2)
.doesNotContainKeys(10)
.contains(entry(2, "a"));
assertThat(map).isNotEmpty().containsKey(2).doesNotContainKeys(10).contains(entry(2, "a"));
}
@Test
public void whenGivenException_then() throws Exception {
Exception ex = new Exception("abc");
assertThat(ex)
.hasNoCause()
.hasMessageEndingWith("c");
assertThat(ex).hasNoCause().hasMessageEndingWith("c");
}
@Ignore // IN ORDER TO TEST, REMOVE THIS LINE
@ -134,8 +114,6 @@ public class AssertJCoreTest {
public void whenRunningAssertion_thenDescribed() throws Exception {
Person person = new Person("Alex", 34);
assertThat(person.getAge())
.as("%s's age should be equal to 100")
.isEqualTo(100);
assertThat(person.getAge()).as("%s's age should be equal to 100").isEqualTo(100);
}
}

39
assertj/src/test/java/com/baeldung/assertj/introduction/AssertJGuavaTest.java
View File

@ -26,9 +26,7 @@ public class AssertJGuavaTest {
final File temp1 = File.createTempFile("bael", "dung1");
final File temp2 = File.createTempFile("bael", "dung2");
assertThat(Files.asByteSource(temp1))
.hasSize(0)
.hasSameContentAs(Files.asByteSource(temp2));
assertThat(Files.asByteSource(temp1)).hasSize(0).hasSameContentAs(Files.asByteSource(temp2));
}
@Test
@ -37,11 +35,7 @@ public class AssertJGuavaTest {
mmap.put(1, "one");
mmap.put(1, "1");
assertThat(mmap)
.hasSize(2)
.containsKeys(1)
.contains(entry(1, "one"))
.contains(entry(1, "1"));
assertThat(mmap).hasSize(2).containsKeys(1).contains(entry(1, "one")).contains(entry(1, "1"));
}
@Test
@ -62,31 +56,21 @@ public class AssertJGuavaTest {
mmap2.put(1, "one");
mmap2.put(1, "1");
assertThat(mmap1)
.containsAllEntriesOf(mmap2)
.containsAllEntriesOf(mmap1_clone)
.hasSameEntriesAs(mmap1_clone);
assertThat(mmap1).containsAllEntriesOf(mmap2).containsAllEntriesOf(mmap1_clone).hasSameEntriesAs(mmap1_clone);
}
@Test
public void givenOptional_whenVerifyingContent_thenShouldBeEqual() throws Exception {
final Optional<String> something = Optional.of("something");
assertThat(something)
.isPresent()
.extractingValue()
.isEqualTo("something");
assertThat(something).isPresent().extractingValue().isEqualTo("something");
}
@Test
public void givenRange_whenVerifying_thenShouldBeCorrect() throws Exception {
final Range<String> range = Range.openClosed("a", "g");
assertThat(range)
.hasOpenedLowerBound()
.isNotEmpty()
.hasClosedUpperBound()
.contains("b");
assertThat(range).hasOpenedLowerBound().isNotEmpty().hasClosedUpperBound().contains("b");
}
@Test
@ -96,10 +80,7 @@ public class AssertJGuavaTest {
map.put(Range.closed(0, 60), "F");
map.put(Range.closed(61, 70), "D");
assertThat(map)
.isNotEmpty()
.containsKeys(0)
.contains(MapEntry.entry(34, "F"));
assertThat(map).isNotEmpty().containsKeys(0).contains(MapEntry.entry(34, "F"));
}
@Test
@ -109,13 +90,7 @@ public class AssertJGuavaTest {
table.put(1, "A", "PRESENT");
table.put(1, "B", "ABSENT");
assertThat(table)
.hasRowCount(1)
.containsValues("ABSENT")
.containsCell(1, "B", "ABSENT");
assertThat(table).hasRowCount(1).containsValues("ABSENT").containsCell(1, "B", "ABSENT");
}
}

50
assertj/src/test/java/com/baeldung/assertj/introduction/AssertJJava8Test.java
View File

@ -20,20 +20,14 @@ public class AssertJJava8Test {
public void givenOptional_shouldAssert() throws Exception {
final Optional<String> givenOptional = Optional.of("something");
assertThat(givenOptional)
.isPresent()
.hasValue("something");
assertThat(givenOptional).isPresent().hasValue("something");
}
@Test
public void givenPredicate_shouldAssert() throws Exception {
final Predicate<String> predicate = s -> s.length() > 4;
assertThat(predicate)
.accepts("aaaaa", "bbbbb")
.rejects("a", "b")
.acceptsAll(asList("aaaaa", "bbbbb"))
.rejectsAll(asList("a", "b"));
assertThat(predicate).accepts("aaaaa", "bbbbb").rejects("a", "b").acceptsAll(asList("aaaaa", "bbbbb")).rejectsAll(asList("a", "b"));
}
@Test
@ -41,74 +35,58 @@ public class AssertJJava8Test {
final LocalDate givenLocalDate = LocalDate.of(2016, 7, 8);
final LocalDate todayDate = LocalDate.now();
assertThat(givenLocalDate)
.isBefore(LocalDate.of(2020, 7, 8))
.isAfterOrEqualTo(LocalDate.of(1989, 7, 8));
assertThat(givenLocalDate).isBefore(LocalDate.of(2020, 7, 8)).isAfterOrEqualTo(LocalDate.of(1989, 7, 8));
assertThat(todayDate)
.isAfter(LocalDate.of(1989, 7, 8))
.isToday();
assertThat(todayDate).isAfter(LocalDate.of(1989, 7, 8)).isToday();
}
@Test
public void givenLocalDateTime_shouldAssert() throws Exception {
final LocalDateTime givenLocalDate = LocalDateTime.of(2016, 7, 8, 12, 0);
assertThat(givenLocalDate)
.isBefore(LocalDateTime.of(2020, 7, 8, 11, 2));
assertThat(givenLocalDate).isBefore(LocalDateTime.of(2020, 7, 8, 11, 2));
}
@Test
public void givenLocalTime_shouldAssert() throws Exception {
final LocalTime givenLocalTime = LocalTime.of(12, 15);
assertThat(givenLocalTime)
.isAfter(LocalTime.of(1, 0))
.hasSameHourAs(LocalTime.of(12, 0));
assertThat(givenLocalTime).isAfter(LocalTime.of(1, 0)).hasSameHourAs(LocalTime.of(12, 0));
}
@Test
public void givenList_shouldAssertFlatExtracting() throws Exception {
final List<LocalDate> givenList = asList(ofYearDay(2016, 5), ofYearDay(2015, 6));
assertThat(givenList)
.flatExtracting(LocalDate::getYear)
.contains(2015);
assertThat(givenList).flatExtracting(LocalDate::getYear).contains(2015);
}
@Test
public void givenList_shouldAssertFlatExtractingLeapYear() throws Exception {
final List<LocalDate> givenList = asList(ofYearDay(2016, 5), ofYearDay(2015, 6));
assertThat(givenList)
.flatExtracting(LocalDate::isLeapYear)
.contains(true);
assertThat(givenList).flatExtracting(LocalDate::isLeapYear).contains(true);
}
@Test
public void givenList_shouldAssertFlatExtractingClass() throws Exception {
final List<LocalDate> givenList = asList(ofYearDay(2016, 5), ofYearDay(2015, 6));
assertThat(givenList)
.flatExtracting(Object::getClass)
.contains(LocalDate.class);
assertThat(givenList).flatExtracting(Object::getClass).contains(LocalDate.class);
}
@Test
public void givenList_shouldAssertMultipleFlatExtracting() throws Exception {
final List<LocalDate> givenList = asList(ofYearDay(2016, 5), ofYearDay(2015, 6));
assertThat(givenList)
.flatExtracting(LocalDate::getYear, LocalDate::getDayOfMonth)
.contains(2015, 6);
assertThat(givenList).flatExtracting(LocalDate::getYear, LocalDate::getDayOfMonth).contains(2015, 6);
}
@Test
public void givenString_shouldSatisfy() throws Exception {
final String givenString = "someString";
assertThat(givenString)
.satisfies(s -> {
assertThat(givenString).satisfies(s -> {
assertThat(s).isNotEmpty();
assertThat(s).hasSize(10);
});
@ -118,15 +96,13 @@ public class AssertJJava8Test {
public void givenString_shouldMatch() throws Exception {
final String emptyString = "";
assertThat(emptyString)
.matches(String::isEmpty);
assertThat(emptyString).matches(String::isEmpty);
}
@Test
public void givenList_shouldHasOnlyOneElementSatisfying() throws Exception {
final List<String> givenList = Arrays.asList("");
assertThat(givenList)
.hasOnlyOneElementSatisfying(s -> assertThat(s).isEmpty());
assertThat(givenList).hasOnlyOneElementSatisfying(s -> assertThat(s).isEmpty());
}
}

9
autovalue/src/main/java/com/baeldung/autovalue/ImmutableMoney.java
View File

@ -1,18 +1,20 @@
package com.baeldung.autovalue;
public final class ImmutableMoney {
private final long amount;
private final String currency;
public ImmutableMoney(long amount, String currency) {
this.amount = amount;
this.currency = currency;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (amount ^ (amount >>> 32));
result = prime * result
+ ((currency == null) ? 0 : currency.hashCode());
result = prime * result + ((currency == null) ? 0 : currency.hashCode());
return result;
}
@ -45,8 +47,7 @@ public final class ImmutableMoney {
@Override
public String toString() {
return "ImmutableMoney [amount=" + amount + ", currency=" + currency
+ "]";
return "ImmutableMoney [amount=" + amount + ", currency=" + currency + "]";
}
}

3
autovalue/src/main/java/com/baeldung/autovalue/MutableMoney.java
View File

@ -3,8 +3,7 @@ package com.baeldung.autovalue;
public class MutableMoney {
@Override
public String toString() {
return "MutableMoney [amount=" + amount + ", currency=" + currency
+ "]";
return "MutableMoney [amount=" + amount + ", currency=" + currency + "]";
}
public long getAmount() {

4
autovalue/src/test/java/com/baeldung/autovalue/MoneyUnitTest.java
View File

@ -32,24 +32,28 @@ public class MoneyUnitTest {
AutoValueMoney m2 = AutoValueMoney.create("USD", 5000);
assertTrue(m1.equals(m2));
}
@Test
public void given2DifferentValueTypesWithAutoValue_whenNotEqual_thenCorrect() {
AutoValueMoney m1 = AutoValueMoney.create("GBP", 5000);
AutoValueMoney m2 = AutoValueMoney.create("USD", 5000);
assertFalse(m1.equals(m2));
}
@Test
public void given2EqualValueTypesWithBuilder_whenEqual_thenCorrect() {
AutoValueMoneyWithBuilder m1 = AutoValueMoneyWithBuilder.builder().setAmount(5000).setCurrency("USD").build();
AutoValueMoneyWithBuilder m2 = AutoValueMoneyWithBuilder.builder().setAmount(5000).setCurrency("USD").build();
assertTrue(m1.equals(m2));
}
@Test
public void given2DifferentValueTypesBuilder_whenNotEqual_thenCorrect() {
AutoValueMoneyWithBuilder m1 = AutoValueMoneyWithBuilder.builder().setAmount(5000).setCurrency("USD").build();
AutoValueMoneyWithBuilder m2 = AutoValueMoneyWithBuilder.builder().setAmount(5000).setCurrency("GBP").build();
assertFalse(m1.equals(m2));
}
@Test
public void givenValueTypeWithBuilder_whenFieldsCorrectlySet_thenCorrect() {
AutoValueMoneyWithBuilder m = AutoValueMoneyWithBuilder.builder().setAmount(5000).setCurrency("USD").build();

1
aws/.gitignore vendored Normal file
View File

@ -0,0 +1 @@
/target/

44
aws/pom.xml Normal file
View File

@ -0,0 +1,44 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>aws</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>aws</name>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

10
aws/src/main/java/com/baeldung/lambda/LambdaMethodHandler.java Normal file
View File

@ -0,0 +1,10 @@
package com.baeldung.lambda;
import com.amazonaws.services.lambda.runtime.Context;
public class LambdaMethodHandler {
public String handleRequest(String input, Context context) {
context.getLogger().log("Input: " + input);
return "Hello World - " + input;
}
}

11
aws/src/main/java/com/baeldung/lambda/LambdaRequestHandler.java Normal file
View File

@ -0,0 +1,11 @@
package com.baeldung.lambda;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
public class LambdaRequestHandler implements RequestHandler<String, String> {
public String handleRequest(String input, Context context) {
context.getLogger().log("Input: " + input);
return "Hello World - " + input;
}
}

17
aws/src/main/java/com/baeldung/lambda/LambdaRequestStreamHandler.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung.lambda;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
import org.apache.commons.io.IOUtils;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class LambdaRequestStreamHandler implements RequestStreamHandler {
public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
String input = IOUtils.toString(inputStream, "UTF-8");
outputStream.write(("Hello World - " + input).getBytes());
}
}

9
core-java-9/pom.xml
View File

@ -1,5 +1,4 @@
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
@ -23,8 +22,6 @@
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
@ -60,7 +57,6 @@
<configuration>
<source>1.9</source>
<target>1.9</target>
<verbose>true</verbose>
</configuration>
</plugin>
@ -75,6 +71,9 @@
</build>
<properties>
<!-- project build encoding -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- logging -->
<org.slf4j.version>1.7.21</org.slf4j.version>

1
core-java-9/src/main/java/com/baeldung/java9/process/ProcessUtils.java
View File

@ -8,7 +8,6 @@ import java.time.Duration;
import java.time.Instant;
import java.util.stream.Stream;
public class ProcessUtils {
public static String getClassPath() {

1
core-java-9/src/main/java/com/baeldung/java9/process/ServiceMain.java
View File

@ -8,7 +8,6 @@ public class ServiceMain {
ProcessHandle thisProcess = ProcessHandle.current();
long pid = thisProcess.getPid();
Optional<String[]> opArgs = Optional.ofNullable(args);
String procName = opArgs.map(str -> str.length > 0 ? str[0] : null).orElse(System.getProperty("sun.java.command"));

17
core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamTest.java
View File

@ -19,10 +19,7 @@ public class Java9OptionalsStreamTest {
public void filterOutPresentOptionalsWithFilter() {
assertEquals(4, listOfOptionals.size());
List<String> filteredList = listOfOptionals.stream()
.filter(Optional::isPresent)
.map(Optional::get)
.collect(Collectors.toList());
List<String> filteredList = listOfOptionals.stream().filter(Optional::isPresent).map(Optional::get).collect(Collectors.toList());
assertEquals(2, filteredList.size());
assertEquals("foo", filteredList.get(0));
@ -33,9 +30,7 @@ public class Java9OptionalsStreamTest {
public void filterOutPresentOptionalsWithFlatMap() {
assertEquals(4, listOfOptionals.size());
List<String> filteredList = listOfOptionals.stream()
.flatMap(o -> o.isPresent() ? Stream.of(o.get()) : Stream.empty())
.collect(Collectors.toList());
List<String> filteredList = listOfOptionals.stream().flatMap(o -> o.isPresent() ? Stream.of(o.get()) : Stream.empty()).collect(Collectors.toList());
assertEquals(2, filteredList.size());
assertEquals("foo", filteredList.get(0));
@ -46,9 +41,7 @@ public class Java9OptionalsStreamTest {
public void filterOutPresentOptionalsWithFlatMap2() {
assertEquals(4, listOfOptionals.size());
List<String> filteredList = listOfOptionals.stream()
.flatMap(o -> o.map(Stream::of).orElseGet(Stream::empty))
.collect(Collectors.toList());
List<String> filteredList = listOfOptionals.stream().flatMap(o -> o.map(Stream::of).orElseGet(Stream::empty)).collect(Collectors.toList());
assertEquals(2, filteredList.size());
assertEquals("foo", filteredList.get(0));
@ -59,9 +52,7 @@ public class Java9OptionalsStreamTest {
public void filterOutPresentOptionalsWithJava9() {
assertEquals(4, listOfOptionals.size());
List<String> filteredList = listOfOptionals.stream()
.flatMap(Optional::stream)
.collect(Collectors.toList());
List<String> filteredList = listOfOptionals.stream().flatMap(Optional::stream).collect(Collectors.toList());
assertEquals(2, filteredList.size());
assertEquals("foo", filteredList.get(0));

5
core-java-9/src/test/java/com/baeldung/java9/MultiResultionImageTest.java
View File

@ -13,7 +13,6 @@ import org.junit.Test;
public class MultiResultionImageTest {
@Test
public void baseMultiResImageTest() {
int baseIndex = 1;
@ -38,10 +37,8 @@ public class MultiResultionImageTest {
return 8 * (i + 1);
}
private static BufferedImage createImage(int i) {
return new BufferedImage(getSize(i), getSize(i),
BufferedImage.TYPE_INT_RGB);
return new BufferedImage(getSize(i), getSize(i), BufferedImage.TYPE_INT_RGB);
}
}

6
core-java-9/src/test/java/com/baeldung/java9/httpclient/SimpleHttpRequestsTest.java
View File

@ -1,7 +1,5 @@
package com.baeldung.java9.httpclient;
import static java.net.HttpURLConnection.HTTP_OK;
import static org.junit.Assert.assertTrue;
@ -117,7 +115,9 @@ public class SimpleHttpRequestsTest {
sb.append(k).append(":");
List<String> l = hMap.get(k);
if (l != null) {
l.forEach( s -> { sb.append(s).append(","); } );
l.forEach(s -> {
sb.append(s).append(",");
});
}
sb.append("\n");
}

3
core-java-9/src/test/java/com/baeldung/java9/language/TryWithResourcesTest.java
View File

@ -57,7 +57,6 @@ public class TryWithResourcesTest {
assertEquals("Expected and Actual does not match", 5, closeCount);
}
static class CloseableException extends Exception implements AutoCloseable {
@Override
public void close() {
@ -66,5 +65,3 @@ public class TryWithResourcesTest {
}
}

61
core-java-9/src/test/java/com/baeldung/java9/language/collections/ListFactoryMethodsTest.java Normal file
View File

@ -0,0 +1,61 @@
package com.baeldung.java9.language.collections;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class ListFactoryMethodsTest {
@Test
public void whenListCreated_thenSuccess() {
List<String> traditionlList = new ArrayList<String>();
traditionlList.add("foo");
traditionlList.add("bar");
traditionlList.add("baz");
List<String> factoryCreatedList = List.of("foo", "bar", "baz");
assertEquals(traditionlList, factoryCreatedList);
}
@Test(expected = UnsupportedOperationException.class)
public void onElemAdd_ifUnSupportedOpExpnThrown_thenSuccess() {
List<String> list = List.of("foo", "bar");
list.add("baz");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemModify_ifUnSupportedOpExpnThrown_thenSuccess() {
List<String> list = List.of("foo", "bar");
list.set(0, "baz");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemRemove_ifUnSupportedOpExpnThrown_thenSuccess() {
List<String> list = List.of("foo", "bar");
list.remove("foo");
}
@Test(expected = NullPointerException.class)
public void onNullElem_ifNullPtrExpnThrown_thenSuccess() {
List.of("foo", "bar", null);
}
@Test
public void ifNotArrayList_thenSuccess() {
List<String> list = List.of("foo", "bar");
assertFalse(list instanceof ArrayList);
}
@Test
public void ifListSizeIsOne_thenSuccess() {
int[] arr = { 1, 2, 3, 4 };
List<int[]> list = List.of(arr);
assertEquals(1, list.size());
assertArrayEquals(arr, list.get(0));
}
}

62
core-java-9/src/test/java/com/baeldung/java9/language/collections/MapFactoryMethodsTest.java Normal file
View File

@ -0,0 +1,62 @@
package com.baeldung.java9.language.collections;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class MapFactoryMethodsTest {
@Test
public void whenMapCreated_thenSuccess() {
Map<String, String> traditionlMap = new HashMap<String, String>();
traditionlMap.put("foo", "a");
traditionlMap.put("bar", "b");
traditionlMap.put("baz", "c");
Map<String, String> factoryCreatedMap = Map.of("foo", "a", "bar", "b", "baz", "c");
assertEquals(traditionlMap, factoryCreatedMap);
}
@Test(expected = UnsupportedOperationException.class)
public void onElemAdd_ifUnSupportedOpExpnThrown_thenSuccess() {
Map<String, String> map = Map.of("foo", "a", "bar", "b");
map.put("baz", "c");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemModify_ifUnSupportedOpExpnThrown_thenSuccess() {
Map<String, String> map = Map.of("foo", "a", "bar", "b");
map.put("foo", "c");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemRemove_ifUnSupportedOpExpnThrown_thenSuccess() {
Map<String, String> map = Map.of("foo", "a", "bar", "b");
map.remove("foo");
}
@Test(expected = IllegalArgumentException.class)
public void givenDuplicateKeys_ifIllegalArgExp_thenSuccess() {
Map.of("foo", "a", "foo", "b");
}
@Test(expected = NullPointerException.class)
public void onNullKey_ifNullPtrExp_thenSuccess() {
Map.of("foo", "a", null, "b");
}
@Test(expected = NullPointerException.class)
public void onNullValue_ifNullPtrExp_thenSuccess() {
Map.of("foo", "a", "bar", null);
}
@Test
public void ifNotHashMap_thenSuccess() {
Map<String, String> map = Map.of("foo", "a", "bar", "b");
assertFalse(map instanceof HashMap);
}
}

60
core-java-9/src/test/java/com/baeldung/java9/language/collections/SetFactoryMethodsTest.java Normal file
View File

@ -0,0 +1,60 @@
package com.baeldung.java9.language.collections;
import java.util.HashSet;
import java.util.Set;
import org.junit.Test;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class SetFactoryMethodsTest {
@Test
public void whenSetCreated_thenSuccess() {
Set<String> traditionlSet = new HashSet<String>();
traditionlSet.add("foo");
traditionlSet.add("bar");
traditionlSet.add("baz");
Set<String> factoryCreatedSet = Set.of("foo", "bar", "baz");
assertEquals(traditionlSet, factoryCreatedSet);
}
@Test(expected = IllegalArgumentException.class)
public void onDuplicateElem_IfIllegalArgExp_thenSuccess() {
Set.of("foo", "bar", "baz", "foo");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemAdd_ifUnSupportedOpExpnThrown_thenSuccess() {
Set<String> set = Set.of("foo", "bar");
set.add("baz");
}
@Test(expected = UnsupportedOperationException.class)
public void onElemRemove_ifUnSupportedOpExpnThrown_thenSuccess() {
Set<String> set = Set.of("foo", "bar", "baz");
set.remove("foo");
}
@Test(expected = NullPointerException.class)
public void onNullElem_ifNullPtrExpnThrown_thenSuccess() {
Set.of("foo", "bar", null);
}
@Test
public void ifNotHashSet_thenSuccess() {
Set<String> list = Set.of("foo", "bar");
assertFalse(list instanceof HashSet);
}
@Test
public void ifSetSizeIsOne_thenSuccess() {
int[] arr = { 1, 2, 3, 4 };
Set<int[]> set = Set.of(arr);
assertEquals(1, set.size());
assertArrayEquals(arr, set.iterator().next());
}
}

61
core-java-9/src/test/java/com/baeldung/java9/language/stream/CollectorImprovementTest.java Normal file
View File

@ -0,0 +1,61 @@
package com.baeldung.java9.language.stream;
import org.junit.Test;
import java.util.*;
import java.util.stream.Collectors;
import java.util.function.Function;
import static org.junit.Assert.assertEquals;
public class CollectorImprovementTest {
@Test
public void givenList_whenSatifyPredicate_thenMapValueWithOccurences() {
List<Integer> numbers = List.of(1, 2, 3, 5, 5);
Map<Integer, Long> result = numbers.stream().filter(val -> val > 3).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
assertEquals(1, result.size());
result = numbers.stream().collect(Collectors.groupingBy(Function.identity(), Collectors.filtering(val -> val > 3, Collectors.counting())));
assertEquals(4, result.size());
}
@Test
public void givenListOfBlogs_whenAuthorName_thenMapAuthorWithComments() {
Blog blog1 = new Blog("1", "Nice", "Very Nice");
Blog blog2 = new Blog("2", "Disappointing", "Ok", "Could be better");
List<Blog> blogs = List.of(blog1, blog2);
Map<String, List<List<String>>> authorComments1 = blogs.stream().collect(Collectors.groupingBy(Blog::getAuthorName, Collectors.mapping(Blog::getComments, Collectors.toList())));
assertEquals(2, authorComments1.size());
assertEquals(2, authorComments1.get("1").get(0).size());
assertEquals(3, authorComments1.get("2").get(0).size());
Map<String, List<String>> authorComments2 = blogs.stream().collect(Collectors.groupingBy(Blog::getAuthorName, Collectors.flatMapping(blog -> blog.getComments().stream(), Collectors.toList())));
assertEquals(2, authorComments2.size());
assertEquals(2, authorComments2.get("1").size());
assertEquals(3, authorComments2.get("2").size());
}
}
class Blog {
private String authorName;
private List<String> comments;
public Blog(String authorName, String... comments) {
this.authorName = authorName;
this.comments = List.of(comments);
}
public String getAuthorName() {
return this.authorName;
}
public List<String> getComments() {
return this.comments;
}
}

26
core-java-9/src/test/java/com/baeldung/java9/language/stream/StreamFeaturesTest.java
View File

@ -17,16 +17,11 @@ public class StreamFeaturesTest {
public static class TakeAndDropWhileTest {
public Stream<String> getStreamAfterTakeWhileOperation() {
return Stream
.iterate("", s -> s + "s")
.takeWhile(s -> s.length() < 10);
return Stream.iterate("", s -> s + "s").takeWhile(s -> s.length() < 10);
}
public Stream<String> getStreamAfterDropWhileOperation() {
return Stream
.iterate("", s -> s + "s")
.takeWhile(s -> s.length() < 10)
.dropWhile(s -> !s.contains("sssss"));
return Stream.iterate("", s -> s + "s").takeWhile(s -> s.length() < 10).dropWhile(s -> !s.contains("sssss"));
}
@Test
@ -75,19 +70,19 @@ public class StreamFeaturesTest {
public static class OfNullableTest {
private List<String> collection = Arrays.asList("A", "B", "C");
private Map<String, Integer> map = new HashMap<>() {{
private Map<String, Integer> map = new HashMap<>() {
{
put("A", 10);
put("C", 30);
}};
}
};
private Stream<Integer> getStreamWithOfNullable() {
return collection.stream()
.flatMap(s -> Stream.ofNullable(map.get(s)));
return collection.stream().flatMap(s -> Stream.ofNullable(map.get(s)));
}
private Stream<Integer> getStream() {
return collection.stream()
.flatMap(s -> {
return collection.stream().flatMap(s -> {
Integer temp = map.get(s);
return temp != null ? Stream.of(temp) : Stream.empty();
});
@ -107,10 +102,7 @@ public class StreamFeaturesTest {
@Test
public void testOfNullable() {
assertEquals(
testOfNullableFrom(getStream()),
testOfNullableFrom(getStreamWithOfNullable())
);
assertEquals(testOfNullableFrom(getStream()), testOfNullableFrom(getStreamWithOfNullable()));
}

1
core-java-9/src/test/java/com/baeldung/java9/process/ProcessApi.java
View File

@ -22,7 +22,6 @@ import static org.junit.Assert.assertTrue;
public class ProcessApi {
@Before
public void init() {

4
core-java/.gitignore vendored
View File

@ -16,3 +16,7 @@
*.txt
/bin/
/temp
#IntelliJ specific
.idea
*.iml

11
core-java/README.md
View File

@ -46,3 +46,14 @@
- [Grep in Java](http://www.baeldung.com/grep-in-java)
- [Java - Combine Multiple Collections](http://www.baeldung.com/java-combine-multiple-collections)
- [Simulated Annealing for Travelling Salesman Problem](http://www.baeldung.com/java-simulated-annealing-for-traveling-salesman)
- [Slope One Algorithm: Collaborative Filtering Recommendation Systems](http://www.baeldung.com/java-collaborative-filtering-recommendations)
- [Differences Between the Java WatchService API and the Apache Commons IO Monitor Library](http://www.baeldung.com/java-watchservice-vs-apache-commons-io-monitor-library)
- [Pattern Search with Grep in Java](http://www.baeldung.com/grep-in-java)
- [URL Encoding and Decoding in Java](http://www.baeldung.com/java-url-encoding-decoding)
- [Calculate the Size of a File in Java](http://www.baeldung.com/java-file-size)
- [The Basics of Java Generics](http://www.baeldung.com/java-generics)
- [The Traveling Salesman Problem in Java](http://www.baeldung.com/java-simulated-annealing-for-traveling-salesman)
- [How to Create an Executable JAR with Maven](http://www.baeldung.com/executable-jar-with-maven)
- [Guide to java.util.concurrent.Future](http://www.baeldung.com/java-future)
- [Guide to java.util.concurrent.BlockingQueue](http://www.baeldung.com/java-blocking-queue)
- [Guide to CountDownLatch in Java](http://www.baeldung.com/java-countdown-latch)

50
core-java/pom.xml
View File

@ -10,6 +10,44 @@
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>org.neo4j.driver</groupId>
<artifactId>neo4j-java-driver</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-jdbc-driver</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-core</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>com.google.inject</groupId>
<artifactId>guice</artifactId>
<version>4.1.0</version>
<classifier>no_aop</classifier>
<scope>test</scope>
</dependency>
<!-- utils -->
<dependency>
<groupId>net.sourceforge.collections</groupId>
@ -153,6 +191,12 @@
<version>${mockito.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>${avaitility.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
@ -262,7 +306,8 @@
<configuration>
<shadedArtifactAttached>true</shadedArtifactAttached>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</transformer>
</transformers>
@ -352,7 +397,7 @@
<logback.version>1.1.7</logback.version>
<!-- util -->
<guava.version>19.0</guava.version>
<guava.version>21.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<bouncycastle.version>1.55</bouncycastle.version>
<commons-codec.version>1.10</commons-codec.version>
@ -370,6 +415,7 @@
<mockito.version>1.10.19</mockito.version>
<testng.version>6.10</testng.version>
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>

6
core-java/src/main/java/com/baeldung/algorithms/RunAlgorithm.java
View File

@ -3,6 +3,7 @@ package com.baeldung.algorithms;
import java.util.Scanner;
import com.baeldung.algorithms.annealing.SimulatedAnnealing;
import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
import com.baeldung.algorithms.slope_one.SlopeOne;
public class RunAlgorithm {
@ -12,6 +13,7 @@ public class RunAlgorithm {
System.out.println("Run algorithm:");
System.out.println("1 - Simulated Annealing");
System.out.println("2 - Slope One");
System.out.println("3 - Simple Genetic Algorithm");
int decision = in.nextInt();
switch (decision) {
case 1:
@ -21,6 +23,10 @@ public class RunAlgorithm {
case 2:
SlopeOne.slopeOne(3);
break;
case 3:
SimpleGeneticAlgorithm ga = new SimpleGeneticAlgorithm();
ga.runAlgorithm(50, "1011000100000100010000100000100111001000000100000100000000001111");
break;
default:
System.out.println("Unknown option");
break;

44
core-java/src/main/java/com/baeldung/algorithms/ga/binary/Individual.java Normal file
View File

@ -0,0 +1,44 @@
package com.baeldung.algorithms.ga.binary;
import lombok.Data;
@Data
public class Individual {
protected int defaultGeneLength = 64;
private byte[] genes = new byte[defaultGeneLength];
private int fitness = 0;
public Individual() {
for (int i = 0; i < genes.length; i++) {
byte gene = (byte) Math.round(Math.random());
genes[i] = gene;
}
}
protected byte getSingleGene(int index) {
return genes[index];
}
protected void setSingleGene(int index, byte value) {
genes[index] = value;
fitness = 0;
}
public int getFitness() {
if (fitness == 0) {
fitness = SimpleGeneticAlgorithm.getFitness(this);
}
return fitness;
}
@Override
public String toString() {
String geneString = "";
for (int i = 0; i < genes.length; i++) {
geneString += getSingleGene(i);
}
return geneString;
}
}

40
core-java/src/main/java/com/baeldung/algorithms/ga/binary/Population.java Normal file
View File

@ -0,0 +1,40 @@
package com.baeldung.algorithms.ga.binary;
import java.util.ArrayList;
import java.util.List;
import lombok.Data;
@Data
public class Population {
private List<Individual> individuals;
public Population(int size, boolean createNew) {
individuals = new ArrayList<>();
if (createNew) {
createNewPopulation(size);
}
}
protected Individual getIndividual(int index) {
return individuals.get(index);
}
protected Individual getFittest() {
Individual fittest = individuals.get(0);
for (int i = 0; i < individuals.size(); i++) {
if (fittest.getFitness() <= getIndividual(i).getFitness()) {
fittest = getIndividual(i);
}
}
return fittest;
}
private void createNewPopulation(int size) {
for (int i = 0; i < size; i++) {
Individual newIndividual = new Individual();
individuals.add(i, newIndividual);
}
}
}

117
core-java/src/main/java/com/baeldung/algorithms/ga/binary/SimpleGeneticAlgorithm.java Normal file
View File

@ -0,0 +1,117 @@
package com.baeldung.algorithms.ga.binary;
import lombok.Data;
@Data
public class SimpleGeneticAlgorithm {
private static final double uniformRate = 0.5;
private static final double mutationRate = 0.025;
private static final int tournamentSize = 5;
private static final boolean elitism = true;
private static byte[] solution = new byte[64];
public boolean runAlgorithm(int populationSize, String solution) {
if (solution.length() != SimpleGeneticAlgorithm.solution.length) {
throw new RuntimeException("The solution needs to have " + SimpleGeneticAlgorithm.solution.length + " bytes");
}
setSolution(solution);
Population myPop = new Population(populationSize, true);
int generationCount = 1;
while (myPop.getFittest().getFitness() < getMaxFitness()) {
System.out.println("Generation: " + generationCount + " Correct genes found: " + myPop.getFittest().getFitness());
myPop = evolvePopulation(myPop);
generationCount++;
}
System.out.println("Solution found!");
System.out.println("Generation: " + generationCount);
System.out.println("Genes: ");
System.out.println(myPop.getFittest());
return true;
}
public Population evolvePopulation(Population pop) {
int elitismOffset;
Population newPopulation = new Population(pop.getIndividuals().size(), false);
if (elitism) {
newPopulation.getIndividuals().add(0, pop.getFittest());
elitismOffset = 1;
} else {
elitismOffset = 0;
}
for (int i = elitismOffset; i < pop.getIndividuals().size(); i++) {
Individual indiv1 = tournamentSelection(pop);
Individual indiv2 = tournamentSelection(pop);
Individual newIndiv = crossover(indiv1, indiv2);
newPopulation.getIndividuals().add(i, newIndiv);
}
for (int i = elitismOffset; i < newPopulation.getIndividuals().size(); i++) {
mutate(newPopulation.getIndividual(i));
}
return newPopulation;
}
private Individual crossover(Individual indiv1, Individual indiv2) {
Individual newSol = new Individual();
for (int i = 0; i < newSol.getDefaultGeneLength(); i++) {
if (Math.random() <= uniformRate) {
newSol.setSingleGene(i, indiv1.getSingleGene(i));
} else {
newSol.setSingleGene(i, indiv2.getSingleGene(i));
}
}
return newSol;
}
private void mutate(Individual indiv) {
for (int i = 0; i < indiv.getDefaultGeneLength(); i++) {
if (Math.random() <= mutationRate) {
byte gene = (byte) Math.round(Math.random());
indiv.setSingleGene(i, gene);
}
}
}
private Individual tournamentSelection(Population pop) {
Population tournament = new Population(tournamentSize, false);
for (int i = 0; i < tournamentSize; i++) {
int randomId = (int) (Math.random() * pop.getIndividuals().size());
tournament.getIndividuals().add(i, pop.getIndividual(randomId));
}
Individual fittest = tournament.getFittest();
return fittest;
}
protected static int getFitness(Individual individual) {
int fitness = 0;
for (int i = 0; i < individual.getDefaultGeneLength() && i < solution.length; i++) {
if (individual.getSingleGene(i) == solution[i]) {
fitness++;
}
}
return fitness;
}
protected int getMaxFitness() {
int maxFitness = solution.length;
return maxFitness;
}
protected void setSolution(String newSolution) {
solution = new byte[newSolution.length()];
for (int i = 0; i < newSolution.length(); i++) {
String character = newSolution.substring(i, i + 1);
if (character.contains("0") || character.contains("1")) {
solution[i] = Byte.parseByte(character);
} else {
solution[i] = 0;
}
}
}
}

3
core-java/src/main/java/com/baeldung/algorithms/slope_one/InputData.java
View File

@ -12,8 +12,7 @@ import lombok.Data;
@Data
public class InputData {
protected static List<Item> items = Arrays.asList(new Item("Candy"), new Item("Drink"), new Item("Soda"), new Item("Popcorn"),
new Item("Snacks"));
protected static List<Item> items = Arrays.asList(new Item("Candy"), new Item("Drink"), new Item("Soda"), new Item("Popcorn"), new Item("Snacks"));
public static Map<User, HashMap<Item, Double>> initializeData(int numberOfUsers) {
Map<User, HashMap<Item, Double>> data = new HashMap<>();

41
core-java/src/main/java/com/baeldung/chainedexception/LogWithChain.java Normal file
View File

@ -0,0 +1,41 @@
package com.baeldung.chainedexception;
import com.baeldung.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.chainedexception.exceptions.TeamLeadUpsetException;
public class LogWithChain {
public static void main(String[] args) throws Exception {
getLeave();
}
private static void getLeave() throws NoLeaveGrantedException {
try {
howIsTeamLead();
} catch (TeamLeadUpsetException e) {
throw new NoLeaveGrantedException("Leave not sanctioned.", e);
}
}
private static void howIsTeamLead() throws TeamLeadUpsetException {
try {
howIsManager();
} catch (ManagerUpsetException e) {
throw new TeamLeadUpsetException("Team lead is not in good mood", e);
}
}
private static void howIsManager() throws ManagerUpsetException {
try {
howIsGirlFriendOfManager();
} catch (GirlFriendOfManagerUpsetException e) {
throw new ManagerUpsetException("Manager is in bad mood", e);
}
}
private static void howIsGirlFriendOfManager() throws GirlFriendOfManagerUpsetException {
throw new GirlFriendOfManagerUpsetException("Girl friend of manager is in bad mood");
}
}

44
core-java/src/main/java/com/baeldung/chainedexception/LogWithoutChain.java Normal file
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@ -0,0 +1,44 @@
package com.baeldung.chainedexception;
import com.baeldung.chainedexception.exceptions.GirlFriendOfManagerUpsetException;
import com.baeldung.chainedexception.exceptions.ManagerUpsetException;
import com.baeldung.chainedexception.exceptions.NoLeaveGrantedException;
import com.baeldung.chainedexception.exceptions.TeamLeadUpsetException;
public class LogWithoutChain {
public static void main(String[] args) throws Exception {
getLeave();
}
private static void getLeave() throws NoLeaveGrantedException {
try {
howIsTeamLead();
} catch (TeamLeadUpsetException e) {
e.printStackTrace();
throw new NoLeaveGrantedException("Leave not sanctioned.");
}
}
private static void howIsTeamLead() throws TeamLeadUpsetException {
try {
howIsManager();
} catch (ManagerUpsetException e) {
e.printStackTrace();
throw new TeamLeadUpsetException("Team lead is not in good mood");
}
}
private static void howIsManager() throws ManagerUpsetException {
try {
howIsGirlFriendOfManager();
} catch (GirlFriendOfManagerUpsetException e) {
e.printStackTrace();
throw new ManagerUpsetException("Manager is in bad mood");
}
}
private static void howIsGirlFriendOfManager() throws GirlFriendOfManagerUpsetException {
throw new GirlFriendOfManagerUpsetException("Girl friend of manager is in bad mood");
}
}

12
core-java/src/main/java/com/baeldung/chainedexception/exceptions/GirlFriendOfManagerUpsetException.java Normal file
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@ -0,0 +1,12 @@
package com.baeldung.chainedexception.exceptions;
public class GirlFriendOfManagerUpsetException extends Exception {
public GirlFriendOfManagerUpsetException(String message, Throwable cause) {
super(message, cause);
}
public GirlFriendOfManagerUpsetException(String message) {
super(message);
}
}

12
core-java/src/main/java/com/baeldung/chainedexception/exceptions/ManagerUpsetException.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.chainedexception.exceptions;
public class ManagerUpsetException extends Exception {
public ManagerUpsetException(String message, Throwable cause) {
super(message, cause);
}
public ManagerUpsetException(String message) {
super(message);
}
}

12
core-java/src/main/java/com/baeldung/chainedexception/exceptions/NoLeaveGrantedException.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.chainedexception.exceptions;
public class NoLeaveGrantedException extends Exception {
public NoLeaveGrantedException(String message, Throwable cause) {
super(message, cause);
}
public NoLeaveGrantedException(String message) {
super(message);
}
}

12
core-java/src/main/java/com/baeldung/chainedexception/exceptions/TeamLeadUpsetException.java Normal file
View File

@ -0,0 +1,12 @@
package com.baeldung.chainedexception.exceptions;
public class TeamLeadUpsetException extends Exception {
public TeamLeadUpsetException(String message, Throwable cause) {
super(message, cause);
}
public TeamLeadUpsetException(String message) {
super(message);
}
}

24
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/BlockingQueueUsage.java Normal file
View File

@ -0,0 +1,24 @@
package com.baeldung.concurrent.blockingqueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
public class BlockingQueueUsage {
public static void main(String[] args) {
int BOUND = 10;
int N_PRODUCERS = 4;
int N_CONSUMERS = Runtime.getRuntime().availableProcessors();
int poisonPill = Integer.MAX_VALUE;
int poisonPillPerProducer = N_CONSUMERS / N_PRODUCERS;
BlockingQueue<Integer> queue = new LinkedBlockingQueue<>(BOUND);
for (int i = 0; i < N_PRODUCERS; i++) {
new Thread(new NumbersProducer(queue, poisonPill, poisonPillPerProducer)).start();
}
for (int j = 0; j < N_CONSUMERS; j++) {
new Thread(new NumbersConsumer(queue, poisonPill)).start();
}
}
}

28
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersConsumer.java Normal file
View File

@ -0,0 +1,28 @@
package com.baeldung.concurrent.blockingqueue;
import java.util.concurrent.BlockingQueue;
public class NumbersConsumer implements Runnable {
private final BlockingQueue<Integer> queue;
private final int poisonPill;
public NumbersConsumer(BlockingQueue<Integer> queue, int poisonPill) {
this.queue = queue;
this.poisonPill = poisonPill;
}
public void run() {
try {
while (true) {
Integer number = queue.take();
if (number.equals(poisonPill)) {
return;
}
String result = number.toString();
System.out.println(Thread.currentThread().getName() + " result: " + result);
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}

34
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersProducer.java Normal file
View File

@ -0,0 +1,34 @@
package com.baeldung.concurrent.blockingqueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ThreadLocalRandom;
public class NumbersProducer implements Runnable {
private final BlockingQueue<Integer> numbersQueue;
private final int poisonPill;
private final int poisonPillPerProducer;
public NumbersProducer(BlockingQueue<Integer> numbersQueue, int poisonPill, int poisonPillPerProducer) {
this.numbersQueue = numbersQueue;
this.poisonPill = poisonPill;
this.poisonPillPerProducer = poisonPillPerProducer;
}
public void run() {
try {
generateNumbers();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
private void generateNumbers() throws InterruptedException {
for (int i = 0; i < 100; i++) {
numbersQueue.put(ThreadLocalRandom.current().nextInt(100));
}
for (int j = 0; j < poisonPillPerProducer; j++) {
numbersQueue.put(poisonPill);
}
}
}

23
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/BrokenWorker.java Normal file
View File

@ -0,0 +1,23 @@
package com.baeldung.concurrent.countdownlatch;
import java.util.List;
import java.util.concurrent.CountDownLatch;
public class BrokenWorker implements Runnable {
private final List<String> outputScraper;
private final CountDownLatch countDownLatch;
public BrokenWorker(final List<String> outputScraper, final CountDownLatch countDownLatch) {
this.outputScraper = outputScraper;
this.countDownLatch = countDownLatch;
}
@Override
public void run() {
if (true) {
throw new RuntimeException("Oh dear");
}
countDownLatch.countDown();
outputScraper.add("Counted down");
}
}

34
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/WaitingWorker.java Normal file
View File

@ -0,0 +1,34 @@
package com.baeldung.concurrent.countdownlatch;
import java.util.List;
import java.util.concurrent.CountDownLatch;
public class WaitingWorker implements Runnable {
private final List<String> outputScraper;
private final CountDownLatch readyThreadCounter;
private final CountDownLatch callingThreadBlocker;
private final CountDownLatch completedThreadCounter;
public WaitingWorker(final List<String> outputScraper, final CountDownLatch readyThreadCounter, final CountDownLatch callingThreadBlocker, CountDownLatch completedThreadCounter) {
this.outputScraper = outputScraper;
this.readyThreadCounter = readyThreadCounter;
this.callingThreadBlocker = callingThreadBlocker;
this.completedThreadCounter = completedThreadCounter;
}
@Override
public void run() {
// Mark this thread as read / started
readyThreadCounter.countDown();
try {
callingThreadBlocker.await();
outputScraper.add("Counted down");
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
completedThreadCounter.countDown();
}
}
}

22
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/Worker.java Normal file
View File

@ -0,0 +1,22 @@
package com.baeldung.concurrent.countdownlatch;
import java.util.List;
import java.util.concurrent.CountDownLatch;
public class Worker implements Runnable {
private final List<String> outputScraper;
private final CountDownLatch countDownLatch;
public Worker(final List<String> outputScraper, final CountDownLatch countDownLatch) {
this.outputScraper = outputScraper;
this.countDownLatch = countDownLatch;
}
@Override
public void run() {
// Do some work
System.out.println("Doing some logic");
outputScraper.add("Counted down");
countDownLatch.countDown();
}
}

26
core-java/src/main/java/com/baeldung/concurrent/future/FactorialSquareCalculator.java Normal file
View File

@ -0,0 +1,26 @@
package com.baeldung.concurrent.future;
import java.util.concurrent.RecursiveTask;
public class FactorialSquareCalculator extends RecursiveTask<Integer> {
private static final long serialVersionUID = 1L;
final private Integer n;
public FactorialSquareCalculator(Integer n) {
this.n = n;
}
@Override
protected Integer compute() {
if (n <= 1) {
return n;
}
FactorialSquareCalculator calculator = new FactorialSquareCalculator(n - 1);
calculator.fork();
return n * n + calculator.join();
}
}

20
core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java Normal file
View File

@ -0,0 +1,20 @@
package com.baeldung.concurrent.future;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
public class SquareCalculator {
private final ExecutorService executor;
public SquareCalculator(ExecutorService executor) {
this.executor = executor;
}
public Future<Integer> calculate(Integer input) {
return executor.submit(() -> {
Thread.sleep(1000);
return input * input;
});
}
}

50
core-java/src/main/java/com/baeldung/graph/Car.java Normal file
View File

@ -0,0 +1,50 @@
package com.baeldung.graph;
import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Relationship;
/**
* @author Danil Kornishev (danil.kornishev@mastercard.com)
*/
@NodeEntity
public class Car {
@GraphId
private Long id;
private String make;
@Relationship(direction = "INCOMING")
private Company company;
public Car(String make, String model) {
this.make = make;
this.model = model;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getMake() {
return make;
}
public void setMake(String make) {
this.make = make;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
private String model;
}

45
core-java/src/main/java/com/baeldung/graph/Company.java Normal file
View File

@ -0,0 +1,45 @@
package com.baeldung.graph;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Relationship;
/**
* @author Danil Kornishev (danil.kornishev@mastercard.com)
*/
@NodeEntity
public class Company {
private Long id;
private String name;
@Relationship(type="owns")
private Car car;
public Company(String name) {
this.name = name;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Car getCar() {
return car;
}
public void setCar(Car car) {
this.car = car;
}
}

2
core-java/src/main/java/com/baeldung/java/map/MyLinkedHashMap.java
View File

@ -11,12 +11,10 @@ public class MyLinkedHashMap<K, V> extends LinkedHashMap<K, V> {
private static final long serialVersionUID = 1L;
private static final int MAX_ENTRIES = 5;
public MyLinkedHashMap(int initialCapacity, float loadFactor, boolean accessOrder) {
super(initialCapacity, loadFactor, accessOrder);
}
@Override
protected boolean removeEldestEntry(Map.Entry eldest) {
return size() > MAX_ENTRIES;

57
core-java/src/main/java/com/baeldung/java8/lambda/exceptions/LambdaExceptionWrappers.java Normal file
View File

@ -0,0 +1,57 @@
package com.baeldung.java8.lambda.exceptions;
import java.util.function.Consumer;
public class LambdaExceptionWrappers {
public static Consumer<Integer> lambdaWrapper(Consumer<Integer> consumer) {
return i -> {
try {
consumer.accept(i);
} catch (ArithmeticException e) {
System.err.println("Arithmetic Exception occured : " + e.getMessage());
}
};
}
static <T, E extends Exception> Consumer<T> consumerWrapper(Consumer<T> consumer, Class<E> clazz) {
return i -> {
try {
consumer.accept(i);
} catch (Exception ex) {
try {
E exCast = clazz.cast(ex);
System.err.println("Exception occured : " + exCast.getMessage());
} catch (ClassCastException ccEx) {
throw ex;
}
}
};
}
public static <T> Consumer<T> throwingConsumerWrapper(ThrowingConsumer<T, Exception> throwingConsumer) {
return i -> {
try {
throwingConsumer.accept(i);
} catch (Exception ex) {
throw new RuntimeException(ex);
}
};
}
public static <T, E extends Exception> Consumer<T> handlingConsumerWrapper(ThrowingConsumer<T, E> throwingConsumer, Class<E> exceptionClass) {
return i -> {
try {
throwingConsumer.accept(i);
} catch (Exception ex) {
try {
E exCast = exceptionClass.cast(ex);
System.err.println("Exception occured : " + exCast.getMessage());
} catch (ClassCastException ccEx) {
throw new RuntimeException(ex);
}
}
};
}
}

8
core-java/src/main/java/com/baeldung/java8/lambda/exceptions/ThrowingConsumer.java Normal file
View File

@ -0,0 +1,8 @@
package com.baeldung.java8.lambda.exceptions;
@FunctionalInterface
public interface ThrowingConsumer<T, E extends Exception> {
void accept(T t) throws E;
}

36
core-java/src/main/java/com/baeldung/java_8_features/groupingby/BlogPost.java Normal file
View File

@ -0,0 +1,36 @@
package com.baeldung.java_8_features.groupingby;
public class BlogPost {
private String title;
private String author;
private BlogPostType type;
private int likes;
public BlogPost(String title, String author, BlogPostType type, int likes) {
this.title = title;
this.author = author;
this.type = type;
this.likes = likes;
}
public String getTitle() {
return title;
}
public String getAuthor() {
return author;
}
public BlogPostType getType() {
return type;
}
public int getLikes() {
return likes;
}
@Override
public String toString() {
return "BlogPost{" + "title='" + title + '\'' + ", type=" + type + ", likes=" + likes + '}';
}
}

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