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iaforek 2017-08-28 09:09:59 +01:00 committed by GitHub
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1006 changed files with 34360 additions and 4151 deletions
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2
algorithms/README.md
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@ -6,3 +6,5 @@
- [Validating Input With Finite Automata in Java](http://www.baeldung.com/finite-automata-java)
- [Introduction to Jenetics Library](http://www.baeldung.com/jenetics)
- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
- [Example of Hill Climbing Algorithm](http://www.baeldung.com/java-hill-climbing-algorithm)
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](http://www.baeldung.com/java-monte-carlo-tree-search)

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algorithms/src/main/java/com/baeldung/algorithms/BinarySearch.java Normal file
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import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class BinarySearch {
public int runBinarySearchIteratively(int[] sortedArray, int key, int low, int high) {
int index = Integer.MAX_VALUE;
while (low <= high) {
int mid = (low + high) / 2;
if (sortedArray[mid] < key) {
low = mid + 1;
} else if (sortedArray[mid] > key) {
high = mid - 1;
} else if (sortedArray[mid] == key) {
index = mid;
break;
}
}
return index;
}
public int runBinarySearchRecursively(int[] sortedArray, int key, int low, int high) {
int middle = (low + high) / 2;
if (high < low) {
return -1;
}
if (key == sortedArray[middle]) {
return middle;
} else if (key < sortedArray[middle]) {
return runBinarySearchRecursively(sortedArray, key, low, middle - 1);
} else {
return runBinarySearchRecursively(sortedArray, key, middle + 1, high);
}
}
public int runBinarySearchUsingJavaArrays(int[] sortedArray, Integer key) {
int index = Arrays.binarySearch(sortedArray, key);
return index;
}
public int runBinarySearchUsingJavaCollections(List<Integer> sortedList, Integer key) {
int index = Collections.binarySearch(sortedList, key);
return index;
}
}

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algorithms/src/main/java/com/baeldung/algorithms/minimax/MiniMax.java
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@ -18,12 +18,12 @@ public class MiniMax {
constructTree(root);
}
private void constructTree(Node node) {
List<Integer> listofPossibleHeaps = GameOfBones.getPossibleStates(node.getNoOfBones());
boolean isMaxPlayer = !node.isMaxPlayer();
private void constructTree(Node parentNode) {
List<Integer> listofPossibleHeaps = GameOfBones.getPossibleStates(parentNode.getNoOfBones());
boolean isChildMaxPlayer = !parentNode.isMaxPlayer();
listofPossibleHeaps.forEach(n -> {
Node newNode = new Node(n, isMaxPlayer);
node.addChild(newNode);
Node newNode = new Node(n, isChildMaxPlayer);
parentNode.addChild(newNode);
if (newNode.getNoOfBones() > 0) {
constructTree(newNode);
}

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algorithms/src/test/java/algorithms/BinarySearchTest.java Normal file
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import java.util.Arrays;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
public class BinarySearchTest {
int[] sortedArray = { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
int key = 6;
int expectedIndexForSearchKey = 7;
int low = 0;
int high = sortedArray.length - 1;
List<Integer> sortedList = Arrays.asList(0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9);
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunIterativelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchIteratively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunRecursivelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchRecursively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunUsingArraysClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaArrays(sortedArray, key));
}
@Test
public void givenASortedListOfIntegers_whenBinarySearchRunUsingCollectionsClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaCollections(sortedList, key));
}
}

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apache-shiro/.gitignore vendored Normal file
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/.idea/
/target/
/apache-shiro.iml

0
apache-shiro/README.md Normal file
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apache-shiro/pom.xml Normal file
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<?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>apache-shiro</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>
<properties>
<apache-shiro-core-version>1.4.0</apache-shiro-core-version>
<log4j-version>1.2.17</log4j-version>
<slf4j-version>1.7.25</slf4j-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-spring-boot-web-starter</artifactId>
<version>${apache-shiro-core-version}</version>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-core</artifactId>
<version>${apache-shiro-core-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j-version}</version>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

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apache-shiro/src/main/java/com/baeldung/Main.java Normal file
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package com.baeldung;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.realm.text.IniRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Main {
private static final transient Logger log = LoggerFactory.getLogger(Main.class);
public static void main(String[] args) {
Realm realm = new MyCustomRealm();
SecurityManager securityManager = new DefaultSecurityManager(realm);
SecurityUtils.setSecurityManager(securityManager);
Subject currentUser = SecurityUtils.getSubject();
if (!currentUser.isAuthenticated()) {
UsernamePasswordToken token
= new UsernamePasswordToken("user", "password");
token.setRememberMe(true);
try {
currentUser.login(token);
} catch (UnknownAccountException uae) {
log.error("Username Not Found!", uae);
} catch (IncorrectCredentialsException ice) {
log.error("Invalid Credentials!", ice);
} catch (LockedAccountException lae) {
log.error("Your Account is Locked!", lae);
} catch (AuthenticationException ae) {
log.error("Unexpected Error!", ae);
}
}
log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");
if (currentUser.hasRole("admin")) {
log.info("Welcome Admin");
} else if(currentUser.hasRole("editor")) {
log.info("Welcome, Editor!");
} else if(currentUser.hasRole("author")) {
log.info("Welcome, Author");
} else {
log.info("Welcome, Guest");
}
if(currentUser.isPermitted("articles:compose")) {
log.info("You can compose an article");
} else {
log.info("You are not permitted to compose an article!");
}
if(currentUser.isPermitted("articles:save")) {
log.info("You can save articles");
} else {
log.info("You can not save articles");
}
if(currentUser.isPermitted("articles:publish")) {
log.info("You can publish articles");
} else {
log.info("You can not publish articles");
}
Session session = currentUser.getSession();
session.setAttribute("key", "value");
String value = (String) session.getAttribute("key");
if (value.equals("value")) {
log.info("Retrieved the correct value! [" + value + "]");
}
currentUser.logout();
System.exit(0);
}
}

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apache-shiro/src/main/java/com/baeldung/MyCustomRealm.java Normal file
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package com.baeldung;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.jdbc.JdbcRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.*;
public class MyCustomRealm extends JdbcRealm {
private Map<String, String> credentials = new HashMap<>();
private Map<String, Set<String>> roles = new HashMap<>();
private Map<String, Set<String>> perm = new HashMap<>();
{
credentials.put("user", "password");
credentials.put("user2", "password2");
credentials.put("user3", "password3");
roles.put("user", new HashSet<>(Arrays.asList("admin")));
roles.put("user2", new HashSet<>(Arrays.asList("editor")));
roles.put("user3", new HashSet<>(Arrays.asList("author")));
perm.put("admin", new HashSet<>(Arrays.asList("*")));
perm.put("editor", new HashSet<>(Arrays.asList("articles:*")));
perm.put("author",
new HashSet<>(Arrays.asList("articles:compose",
"articles:save")));
}
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token)
throws AuthenticationException {
UsernamePasswordToken uToken = (UsernamePasswordToken) token;
if(uToken.getUsername() == null
|| uToken.getUsername().isEmpty()
|| !credentials.containsKey(uToken.getUsername())
) {
throw new UnknownAccountException("username not found!");
}
return new SimpleAuthenticationInfo(
uToken.getUsername(), credentials.get(uToken.getUsername()),
getName());
}
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
Set<String> roleNames = new HashSet<>();
Set<String> permissions = new HashSet<>();
principals.forEach(p -> {
try {
Set<String> roles = getRoleNamesForUser(null, (String) p);
roleNames.addAll(roles);
permissions.addAll(getPermissions(null, null,roles));
} catch (SQLException e) {
e.printStackTrace();
}
});
SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(roleNames);
info.setStringPermissions(permissions);
return info;
}
@Override
protected Set<String> getRoleNamesForUser(Connection conn, String username) throws SQLException {
if(!roles.containsKey(username)) {
throw new SQLException("username not found!");
}
return roles.get(username);
}
@Override
protected Set<String> getPermissions(Connection conn, String username, Collection<String> roleNames) throws SQLException {
for (String role : roleNames) {
if (!perm.containsKey(role)) {
throw new SQLException("role not found!");
}
}
Set<String> finalSet = new HashSet<>();
for (String role : roleNames) {
finalSet.addAll(perm.get(role));
}
return finalSet;
}
}

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apache-shiro/src/main/java/com/baeldung/ShiroSpringApplication.java Normal file
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package com.baeldung;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.spring.web.config.DefaultShiroFilterChainDefinition;
import org.apache.shiro.spring.web.config.ShiroFilterChainDefinition;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
/**
* Created by smatt on 21/08/2017.
*/
@SpringBootApplication
public class ShiroSpringApplication {
private static final transient Logger log = LoggerFactory.getLogger(ShiroSpringApplication.class);
public static void main(String... args) {
SpringApplication.run(ShiroSpringApplication.class, args);
}
@Bean
public Realm realm() {
return new MyCustomRealm();
}
@Bean
public ShiroFilterChainDefinition shiroFilterChainDefinition() {
DefaultShiroFilterChainDefinition filter
= new DefaultShiroFilterChainDefinition();
filter.addPathDefinition("/secure", "authc");
filter.addPathDefinition("/**", "anon");
return filter;
}
}

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apache-shiro/src/main/java/com/baeldung/controllers/ShiroSpringController.java Normal file
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package com.baeldung.controllers;
import com.baeldung.models.UserCredentials;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import javax.servlet.http.HttpServletRequest;
@Controller
public class ShiroSpringController {
@GetMapping("/")
public String index() {
return "index";
}
@RequestMapping( value = "/login", method = {RequestMethod.GET, RequestMethod.POST})
public String login(HttpServletRequest req, UserCredentials cred, RedirectAttributes attr) {
if(req.getMethod().equals(RequestMethod.GET.toString())) {
return "login";
}
else {
Subject subject = SecurityUtils.getSubject();
if(!subject.isAuthenticated()) {
UsernamePasswordToken token = new UsernamePasswordToken(
cred.getUsername(), cred.getPassword(), cred.isRememberMe());
try {
subject.login(token);
} catch (AuthenticationException ae) {
ae.printStackTrace();
attr.addFlashAttribute("error", "Invalid Credentials");
return "redirect:/login";
}
}
return "redirect:/secure";
}
}
@GetMapping("/secure")
public String secure(ModelMap modelMap) {
Subject currentUser = SecurityUtils.getSubject();
String role = "", permission = "";
if(currentUser.hasRole("admin")) {
role = role + "You are an Admin";
}
else if(currentUser.hasRole("editor")) {
role = role + "You are an Editor";
}
else if(currentUser.hasRole("author")) {
role = role + "You are an Author";
}
if(currentUser.isPermitted("articles:compose")) {
permission = permission + "You can compose an article, ";
} else {
permission = permission + "You are not permitted to compose an article!, ";
}
if(currentUser.isPermitted("articles:save")) {
permission = permission + "You can save articles, ";
} else {
permission = permission + "\nYou can not save articles, ";
}
if(currentUser.isPermitted("articles:publish")) {
permission = permission + "\nYou can publish articles";
} else {
permission = permission + "\nYou can not publish articles";
}
modelMap.addAttribute("username", currentUser.getPrincipal());
modelMap.addAttribute("permission", permission);
modelMap.addAttribute("role", role);
return "secure";
}
@PostMapping("/logout")
public String logout() {
Subject subject = SecurityUtils.getSubject();
subject.logout();
return "redirect:/";
}
}

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apache-shiro/src/main/java/com/baeldung/models/UserCredentials.java Normal file
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package com.baeldung.models;
public class UserCredentials {
private String username;
private String password;
private boolean rememberMe = false;
public UserCredentials() {}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public boolean isRememberMe() {
return rememberMe;
}
public void setRememberMe(boolean rememberMe) {
this.rememberMe = rememberMe;
}
@Override
public String toString() {
return "username = " + getUsername()
+ "\nrememberMe = " + isRememberMe();
}
}

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apache-shiro/src/main/resources/application.properties Normal file
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server.port=9000
server.servlet-path=/
server.context-path=/
#shiro-spring-boot-config
shiro.loginUrl = /login
shiro.successUrl = /secure
shiro.unauthorizedUrl = /login
#freemarker
spring.freemarker.suffix=.ftl

12
apache-shiro/src/main/resources/log4j.properties Normal file
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log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m %n
log4j.logger.org.apache=WARN
log4j.logger.org.apache.shiro=INFO
log4j.logger.org.apache.shiro.util.ThreadContext=WARN
log4j.logger.org.apache.shiro.cache.ehcache.EhCache=WARN

9
apache-shiro/src/main/resources/shiro.ini Normal file
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[users]
user = password,admin
user2 = password2,editor
user3 = password3,author
[roles]
admin = *
editor = articles:*
author = articles:compose,articles:save

10
apache-shiro/src/main/resources/templates/index.ftl Normal file
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<html>
<head>
<title>Index</title>
</head>
<body>
<h1>Welcome Guest!</h1>
<br>
<a href="/login">Login</a>
</body>
</html>

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apache-shiro/src/main/resources/templates/login.ftl Normal file
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<html>
<head>
<title>Login</title>
</head>
<body style="margin-left: 30px;">
<h3>Login</h3>
<br>
<form action="/login" method="post">
<#if (error?length > 0)??>
<p style="color:darkred;">${error}</p>
<#else>
</#if>
<label for="username">Username</label>
<br>
<input type="text" name="username">
<br><br>
<label for="password">Password</label>
<br>
<input type="password" name="password">
<br><br>
<input type="checkbox" name="rememberMe"> Remember Me
<br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>

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apache-shiro/src/main/resources/templates/secure.ftl Normal file
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<html>
<head>
<title>Secure</title>
</head>
<body style="margin-left: 30px;">
<h1>Welcome ${username}!</h1>
<p><strong>Role</strong>: ${role}</p>
<p><strong>Permissions</strong></p>
<p>${permission}</p>
<br>
<form role="form" action="/logout" method="POST">
<input type="Submit" value="Logout" />
</form>
</body>
</html>

2
apache-velocity/src/main/webapp/WEB-INF/velocity.properties
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@ -1,4 +1,4 @@
resource.loader=webapp
webapp.resource.loader.class=org.apache.velocity.tools.view.WebappResourceLoader
webapp.resource.loader.path = .
webapp.resource.loader.path =
webapp.resource.loader.cache = true

3
asciidoctor/README.md
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@ -1,3 +1,4 @@
### Relevant articles
- [Introduction to Asciidoctor](http://www.baeldung.com/introduction-to-asciidoctor)
- [Introduction to Asciidoctor](http://www.baeldung.com/introduction-to-asciidoctor)
- [Generating a Book with Asciidoctor](http://www.baeldung.com/asciidoctor-book)

5
asciidoctor/pom.xml
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@ -35,7 +35,12 @@
<configuration>
<sourceDirectory>src/docs/asciidoc</sourceDirectory>
<outputDirectory>target/docs/asciidoc</outputDirectory>
<attributes>
<pdf-stylesdir>${project.basedir}/src/themes</pdf-stylesdir>
<pdf-style>custom</pdf-style>
</attributes>
<backend>pdf</backend>
<doctype>book</doctype>
</configuration>
</plugin>
</plugins>

14
asciidoctor/src/docs/asciidoc/test.adoc
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@ -1,3 +1,13 @@
== Introduction Section
:icons: font
Hi. I'm a simple test to see if this Maven build is working. If you see me in a nice PDF, then it means everything is [red]#working#.
= Generating book with AsciiDoctorj
Baeldung
[abstract]
This is the actual content.
== First Section
This is first section of the book where you can include some nice icons like icon:comment[].
You can also create http://www.baeldung.com[links]

29
asciidoctor/src/themes/custom-theme.yml Normal file
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title_page:
align: left
page:
layout: portrait
margin: [0.75in, 1in, 0.75in, 1in]
size: A4
base:
font_color: #333333
line_height_length: 17
line_height: $base_line_height_length / $base_font_size
link:
font_color: #009900
header:
height: 0.5in
line_height: 1
recto_content:
center: '{document-title}'
verso_content:
center: '{document-title}'
footer:
height: 0.5in
line_height: 1
recto_content:
right: '{chapter-title} | *{page-number}*'
verso_content:
left: '*{page-number}* | {chapter-title}'

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aws/pom.xml
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@ -18,9 +18,41 @@
<aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
<aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
<gson.version>2.8.0</gson.version>
<aws-java-sdk.version>1.11.154</aws-java-sdk.version>
<junit.version>4.12</junit.version>
<mockito-core.version>2.8.9</mockito-core.version>
<assertj-core.version>3.8.0</assertj-core.version>
</properties>
<dependencies>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk</artifactId>
<version>${aws-java-sdk.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito-core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-lambda-java-core</artifactId>

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aws/src/main/java/com/baeldung/s3/AWSS3Service.java Normal file
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package com.baeldung.s3;
import java.io.File;
import java.util.List;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.Bucket;
import com.amazonaws.services.s3.model.CopyObjectResult;
import com.amazonaws.services.s3.model.DeleteObjectsRequest;
import com.amazonaws.services.s3.model.DeleteObjectsResult;
import com.amazonaws.services.s3.model.ObjectListing;
import com.amazonaws.services.s3.model.PutObjectResult;
import com.amazonaws.services.s3.model.S3Object;
public class AWSS3Service {
private final AmazonS3 s3client;
public AWSS3Service() {
this(new AmazonS3Client() {
});
}
public AWSS3Service(AmazonS3 s3client) {
this.s3client = s3client;
}
//is bucket exist?
public boolean doesBucketExist(String bucketName) {
return s3client.doesBucketExist(bucketName);
}
//create a bucket
public Bucket createBucket(String bucketName) {
return s3client.createBucket(bucketName);
}
//list all buckets
public List<Bucket> listBuckets() {
return s3client.listBuckets();
}
//delete a bucket
public void deleteBucket(String bucketName) {
s3client.deleteBucket(bucketName);
}
//uploading object
public PutObjectResult putObject(String bucketName, String key, File file) {
return s3client.putObject(bucketName, key, file);
}
//listing objects
public ObjectListing listObjects(String bucketName) {
return s3client.listObjects(bucketName);
}
//get an object
public S3Object getObject(String bucketName, String objectKey) {
return s3client.getObject(bucketName, objectKey);
}
//copying an object
public CopyObjectResult copyObject(
String sourceBucketName,
String sourceKey,
String destinationBucketName,
String destinationKey
) {
return s3client.copyObject(
sourceBucketName,
sourceKey,
destinationBucketName,
destinationKey
);
}
//deleting an object
public void deleteObject(String bucketName, String objectKey) {
s3client.deleteObject(bucketName, objectKey);
}
//deleting multiple Objects
public DeleteObjectsResult deleteObjects(DeleteObjectsRequest delObjReq) {
return s3client.deleteObjects(delObjReq);
}
}

101
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@ -0,0 +1,101 @@
package com.baeldung.s3;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.Bucket;
import com.amazonaws.services.s3.model.DeleteObjectsRequest;
import com.amazonaws.services.s3.model.ObjectListing;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectInputStream;
import com.amazonaws.services.s3.model.S3ObjectSummary;
public class S3Application {
private static final AWSCredentials credentials;
private static String bucketName;
static {
//put your accesskey and secretkey here
credentials = new BasicAWSCredentials(
"<AWS accesskey>",
"<AWS secretkey>"
);
}
public static void main(String[] args) throws IOException {
//set-up the client
AmazonS3 s3client = AmazonS3ClientBuilder
.standard()
.withCredentials(new AWSStaticCredentialsProvider(credentials))
.withRegion(Regions.US_EAST_2)
.build();
AWSS3Service awsService = new AWSS3Service(s3client);
bucketName = "baeldung-bucket";
//creating a bucket
if(awsService.doesBucketExist(bucketName)) {
System.out.println("Bucket name is not available."
+ " Try again with a different Bucket name.");
return;
}
awsService.createBucket(bucketName);
//list all the buckets
for(Bucket s : awsService.listBuckets() ) {
System.out.println(s.getName());
}
//deleting bucket
awsService.deleteBucket("baeldung-bucket-test2");
//uploading object
awsService.putObject(
bucketName,
"Document/hello.txt",
new File("/Users/user/Document/hello.txt")
);
//listing objects
ObjectListing objectListing = awsService.listObjects(bucketName);
for(S3ObjectSummary os : objectListing.getObjectSummaries()) {
System.out.println(os.getKey());
}
//downloading an object
S3Object s3object = awsService.getObject(bucketName, "Document/hello.txt");
S3ObjectInputStream inputStream = s3object.getObjectContent();
FileUtils.copyInputStreamToFile(inputStream, new File("/Users/user/Desktop/hello.txt"));
//copying an object
awsService.copyObject(
"baeldung-bucket",
"picture/pic.png",
"baeldung-bucket2",
"Document/picture.png"
);
//deleting an object
awsService.deleteObject(bucketName, "Document/hello.txt");
//deleting multiple objects
String objkeyArr[] = {
"Document/hello2.txt",
"Document/picture.png"
};
DeleteObjectsRequest delObjReq = new DeleteObjectsRequest("baeldung-bucket")
.withKeys(objkeyArr);
awsService.deleteObjects(delObjReq);
}
}

113
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@ -0,0 +1,113 @@
package com.baeldung.s3;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.io.File;
import org.junit.Before;
import org.junit.Test;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.CopyObjectResult;
import com.amazonaws.services.s3.model.DeleteObjectsRequest;
import com.amazonaws.services.s3.model.DeleteObjectsResult;
import com.amazonaws.services.s3.model.PutObjectResult;
public class AWSS3ServiceIntegrationTest {
private static final String BUCKET_NAME = "bucket_name";
private static final String KEY_NAME = "key_name";
private static final String BUCKET_NAME2 = "bucket_name2";
private static final String KEY_NAME2 = "key_name2";
private AmazonS3 s3;
private AWSS3Service service;
@Before
public void setUp() {
s3 = mock(AmazonS3.class);
service = new AWSS3Service(s3);
}
@Test
public void whenInitializingAWSS3Service_thenNotNull() {
assertThat(new AWSS3Service()).isNotNull();
}
@Test
public void whenVerifyingIfS3BucketExist_thenCorrect() {
service.doesBucketExist(BUCKET_NAME);
verify(s3).doesBucketExist(BUCKET_NAME);
}
@Test
public void whenVerifyingCreationOfS3Bucket_thenCorrect() {
service.createBucket(BUCKET_NAME);
verify(s3).createBucket(BUCKET_NAME);
}
@Test
public void whenVerifyingListBuckets_thenCorrect() {
service.listBuckets();
verify(s3).listBuckets();
}
@Test
public void whenDeletingBucket_thenCorrect() {
service.deleteBucket(BUCKET_NAME);
verify(s3).deleteBucket(BUCKET_NAME);
}
@Test
public void whenVerifyingPutObject_thenCorrect() {
File file = mock(File.class);
PutObjectResult result = mock(PutObjectResult.class);
when(s3.putObject(anyString(), anyString(), (File) any())).thenReturn(result);
assertThat(service.putObject(BUCKET_NAME, KEY_NAME, file)).isEqualTo(result);
verify(s3).putObject(BUCKET_NAME, KEY_NAME, file);
}
@Test
public void whenVerifyingListObjects_thenCorrect() {
service.listObjects(BUCKET_NAME);
verify(s3).listObjects(BUCKET_NAME);
}
@Test
public void whenVerifyingGetObject_thenCorrect() {
service.getObject(BUCKET_NAME, KEY_NAME);
verify(s3).getObject(BUCKET_NAME, KEY_NAME);
}
@Test
public void whenVerifyingCopyObject_thenCorrect() {
CopyObjectResult result = mock(CopyObjectResult.class);
when(s3.copyObject(anyString(), anyString(), anyString(), anyString())).thenReturn(result);
assertThat(service.copyObject(BUCKET_NAME, KEY_NAME, BUCKET_NAME2, KEY_NAME2)).isEqualTo(result);
verify(s3).copyObject(BUCKET_NAME, KEY_NAME, BUCKET_NAME2, KEY_NAME2);
}
@Test
public void whenVerifyingDeleteObject_thenCorrect() {
service.deleteObject(BUCKET_NAME, KEY_NAME);
verify(s3).deleteObject(BUCKET_NAME, KEY_NAME);
}
@Test
public void whenVerifyingDeleteObjects_thenCorrect() {
DeleteObjectsRequest request = mock(DeleteObjectsRequest.class);
DeleteObjectsResult result = mock(DeleteObjectsResult.class);
when(s3.deleteObjects((DeleteObjectsRequest)any())).thenReturn(result);
assertThat(service.deleteObjects(request)).isEqualTo(result);
verify(s3).deleteObjects(request);
}
}

11
bootique/config.yml Normal file
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@ -0,0 +1,11 @@
log:
level: warn
appenders:
- type: file
logFormat: '%c{20}: %m%n'
file: /home/logger.log
jetty:
context: /hello
connector:
port: 10001

50
bootique/dependency-reduced-pom.xml Normal file
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@ -0,0 +1,50 @@
<?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/maven-v4_0_0.xsd">
<parent>
<artifactId>bootique-parent</artifactId>
<groupId>io.bootique.parent</groupId>
<version>0.12</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.bootique</groupId>
<artifactId>bootique</artifactId>
<name>bootique</name>
<version>1.0-SNAPSHOT</version>
<url>http://maven.apache.org</url>
<build>
<plugins>
<plugin>
<artifactId>maven-shade-plugin</artifactId>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>io.bootique</groupId>
<artifactId>bootique-test</artifactId>
<version>0.23</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.bootique.bom</groupId>
<artifactId>bootique-bom</artifactId>
<version>0.23</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<main.class>com.baeldung.bootique.App</main.class>
</properties>
</project>

66
bootique/pom.xml Normal file
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@ -0,0 +1,66 @@
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.bootique</groupId>
<artifactId>bootique</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>bootique</name>
<url>http://maven.apache.org</url>
<properties>
<main.class>com.baeldung.bootique.App</main.class>
</properties>
<parent>
<groupId>io.bootique.parent</groupId>
<artifactId>bootique-parent</artifactId>
<version>0.12</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.bootique.bom</groupId>
<artifactId>bootique-bom</artifactId>
<version>0.23</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.bootique.jersey</groupId>
<artifactId>bootique-jersey</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.bootique.logback</groupId>
<artifactId>bootique-logback</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>io.bootique</groupId>
<artifactId>bootique-test</artifactId>
<scope>test</scope>
</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-shade-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

41
bootique/src/main/java/com/baeldung/bootique/App.java Normal file
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@ -0,0 +1,41 @@
package com.baeldung.bootique;
import com.baeldung.bootique.module.ModuleBinder;
import com.baeldung.bootique.router.IndexController;
import com.baeldung.bootique.router.SaveController;
import com.google.inject.Module;
import io.bootique.Bootique;
import io.bootique.jersey.JerseyModule;
import io.bootique.log.BootLogger;
import java.util.function.Supplier;
public class App {
public static void main(String[] args) {
Module module = binder -> JerseyModule.extend(binder).addResource(IndexController.class)
.addResource(SaveController.class);
Bootique.app(args).module(module).module(ModuleBinder.class).bootLogger(new BootLogger() {
@Override
public void trace(Supplier<String> arg0) {
// ...
}
@Override
public void stdout(String arg0) {
// ...
}
@Override
public void stderr(String arg0, Throwable arg1) {
// ...
}
@Override
public void stderr(String arg0) {
// ...
}
}).autoLoadModules().exec();
}
}

15
bootique/src/main/java/com/baeldung/bootique/module/ModuleBinder.java Normal file
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@ -0,0 +1,15 @@
package com.baeldung.bootique.module;
import com.baeldung.bootique.service.HelloService;
import com.baeldung.bootique.service.impl.HelloServiceImpl;
import com.google.inject.Binder;
import com.google.inject.Module;
public class ModuleBinder implements Module {
@Override
public void configure(Binder binder) {
binder.bind(HelloService.class).to(HelloServiceImpl.class);
}
}

13
bootique/src/main/java/com/baeldung/bootique/module/ModuleProvider.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.bootique.module;
import com.google.inject.Module;
import io.bootique.BQModuleProvider;
public class ModuleProvider implements BQModuleProvider {
@Override
public Module module() {
return new ModuleBinder();
}
}

14
bootique/src/main/java/com/baeldung/bootique/router/IndexController.java Normal file
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@ -0,0 +1,14 @@
package com.baeldung.bootique.router;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
@Path("/")
public class IndexController {
@GET
public String index() {
return "Hello, baeldung!";
}
}

20
bootique/src/main/java/com/baeldung/bootique/router/SaveController.java Normal file
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@ -0,0 +1,20 @@
package com.baeldung.bootique.router;
import com.baeldung.bootique.service.HelloService;
import com.google.inject.Inject;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
@Path("/save")
public class SaveController {
@Inject
HelloService helloService;
@POST
public String save() {
return "Data Saved!";
}
}

7
bootique/src/main/java/com/baeldung/bootique/service/HelloService.java Normal file
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@ -0,0 +1,7 @@
package com.baeldung.bootique.service;
public interface HelloService {
boolean save();
}

12
bootique/src/main/java/com/baeldung/bootique/service/impl/HelloServiceImpl.java Normal file
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@ -0,0 +1,12 @@
package com.baeldung.bootique.service.impl;
import com.baeldung.bootique.service.HelloService;
public class HelloServiceImpl implements HelloService {
@Override
public boolean save() {
return true;
}
}

1
bootique/src/main/resources/META-INF/services/io.bootique.BQModuleProvider Normal file
View File

@ -0,0 +1 @@
com.baeldung.bootique.module.ModuleProvider

27
bootique/src/test/java/com/baeldung/bootique/AppTest.java Normal file
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@ -0,0 +1,27 @@
package com.baeldung.bootique;
import com.baeldung.bootique.service.HelloService;
import io.bootique.BQRuntime;
import io.bootique.test.junit.BQDaemonTestFactory;
import io.bootique.test.junit.BQTestFactory;
import org.junit.Rule;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class AppTest {
@Rule
public BQTestFactory bqTestFactory = new BQTestFactory();
@Rule
public BQDaemonTestFactory bqDaemonTestFactory = new BQDaemonTestFactory();
@Test
public void givenService_expectBoolen() {
BQRuntime runtime = bqTestFactory.app("--server").autoLoadModules().createRuntime();
HelloService service = runtime.getInstance(HelloService.class);
assertEquals(true, service.save());
}
}

13
camel-api/src/main/java/com/baeldung/camel/Application.java
View File

@ -13,14 +13,13 @@ import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
@SpringBootApplication
@ComponentScan(basePackages="com.baeldung.camel")
public class Application extends SpringBootServletInitializer {
public class Application{
@Value("${server.port}")
String serverPort;
@ -62,10 +61,12 @@ public class Application extends SpringBootServletInitializer {
.bindingMode(RestBindingMode.json)
.dataFormatProperty("prettyPrint", "true");
/**
The Rest DSL supports automatic binding json/xml contents to/from POJOs using Camels Data Format.
By default the binding mode is off, meaning there is no automatic binding happening for incoming and outgoing messages.
You may want to use binding if you develop POJOs that maps to your REST services request and response types.
This allows you, as a developer, to work with the POJOs in Java code.
The Rest DSL supports automatic binding json/xml contents to/from
POJOs using Camels Data Format.
By default the binding mode is off, meaning there is no automatic
binding happening for incoming and outgoing messages.
You may want to use binding if you develop POJOs that maps to
your REST services request and response types.
*/
rest("/api/").description("Teste REST Service")

3
core-java-9/README.md
View File

@ -13,3 +13,6 @@
- [Java 9 Process API Improvements](http://www.baeldung.com/java-9-process-api)
- [Introduction to Java 9 StackWalking API](http://www.baeldung.com/java-9-stackwalking-api)
- [Introduction to Project Jigsaw](http://www.baeldung.com/project-jigsaw-java-modularity)
- [Java 9 Optional API Additions](http://www.baeldung.com/java-9-optional)
- [Java 9 Reactive Streams](http://www.baeldung.com/java-9-reactive-streams)
- [How to Get All Dates Between Two Dates?](http://www.baeldung.com/java-between-dates)

2
core-java-9/src/main/java/com/baeldung/java9/process/ServiceMain.java
View File

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

86
core-java-9/src/test/java/com/baeldung/java9/language/Java9ObjectsAPIUnitTest.java Normal file
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@ -0,0 +1,86 @@
package com.baeldung.java9.language;
import org.junit.Test;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import static org.hamcrest.Matchers.*;
import static org.hamcrest.MatcherAssert.assertThat;
public class Java9ObjectsAPIUnitTest {
private List<String> aMethodReturningNullList(){
return null;
}
@Test
public void givenNullObject_whenRequireNonNullElse_thenElse(){
List<String> aList = Objects.<List>requireNonNullElse(
aMethodReturningNullList(), Collections.EMPTY_LIST);
assertThat(aList, is(Collections.EMPTY_LIST));
}
private List<String> aMethodReturningNonNullList(){
return List.of("item1", "item2");
}
@Test
public void givenObject_whenRequireNonNullElse_thenObject(){
List<String> aList = Objects.<List>requireNonNullElse(
aMethodReturningNonNullList(), Collections.EMPTY_LIST);
assertThat(aList, is(List.of("item1", "item2")));
}
@Test(expected = NullPointerException.class)
public void givenNull_whenRequireNonNullElse_thenException(){
Objects.<List>requireNonNullElse(null, null);
}
@Test
public void givenObject_whenRequireNonNullElseGet_thenObject(){
List<String> aList = Objects.<List>requireNonNullElseGet(null, List::of);
assertThat(aList, is(List.of()));
}
@Test
public void givenNumber_whenInvokeCheckIndex_thenNumber(){
int length = 5;
assertThat(Objects.checkIndex(4, length), is(4));
}
@Test(expected = IndexOutOfBoundsException.class)
public void givenOutOfRangeNumber_whenInvokeCheckIndex_thenException(){
int length = 5;
Objects.checkIndex(5, length);
}
@Test
public void givenSubRange_whenCheckFromToIndex_thenNumber(){
int length = 6;
assertThat(Objects.checkFromToIndex(2,length,length), is(2));
}
@Test(expected = IndexOutOfBoundsException.class)
public void givenInvalidSubRange_whenCheckFromToIndex_thenException(){
int length = 6;
Objects.checkFromToIndex(2,7,length);
}
@Test
public void givenSubRange_whenCheckFromIndexSize_thenNumber(){
int length = 6;
assertThat(Objects.checkFromIndexSize(2,3,length), is(2));
}
@Test(expected = IndexOutOfBoundsException.class)
public void givenInvalidSubRange_whenCheckFromIndexSize_thenException(){
int length = 6;
Objects.checkFromIndexSize(2, 6, length);
}
}

26
core-java-concurrency/.gitignore vendored Normal file
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@ -0,0 +1,26 @@
*.class
0.*
#folders#
/target
/neoDb*
/data
/src/main/webapp/WEB-INF/classes
*/META-INF/*
.resourceCache
# Packaged files #
*.jar
*.war
*.ear
# Files generated by integration tests
*.txt
backup-pom.xml
/bin/
/temp
#IntelliJ specific
.idea/
*.iml

32
core-java-concurrency/README.md Normal file
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@ -0,0 +1,32 @@
=========
## Core Java Concurrency Examples
### Relevant Articles:
- [Guide To CompletableFuture](http://www.baeldung.com/java-completablefuture)
- [A Guide to the Java ExecutorService](http://www.baeldung.com/java-executor-service-tutorial)
- [Introduction to Thread Pools in Java](http://www.baeldung.com/thread-pool-java-and-guava)
- [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)
- [A Guide to ConcurrentMap](http://www.baeldung.com/java-concurrent-map)
- [Guide to PriorityBlockingQueue in Java](http://www.baeldung.com/java-priority-blocking-queue)
- [Avoiding the ConcurrentModificationException in Java](http://www.baeldung.com/java-concurrentmodificationexception)
- [Custom Thread Pools In Java 8 Parallel Streams](http://www.baeldung.com/java-8-parallel-streams-custom-threadpool)
- [Guide to java.util.concurrent.Locks](http://www.baeldung.com/java-concurrent-locks)
- [An Introduction to ThreadLocal in Java](http://www.baeldung.com/java-threadlocal)
- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)
- [A Guide to Java SynchronousQueue](http://www.baeldung.com/java-synchronous-queue)
- [Guide to the Java TransferQueue](http://www.baeldung.com/java-transfer-queue)
- [Guide to the ConcurrentSkipListMap](http://www.baeldung.com/java-concurrent-skip-list-map)
- [Difference Between Wait and Sleep in Java](http://www.baeldung.com/java-wait-and-sleep)
- [LongAdder and LongAccumulator in Java](http://www.baeldung.com/java-longadder-and-longaccumulator)
- [The Dining Philosophers Problem in Java](http://www.baeldung.com/java-dining-philoshophers)
- [Guide to CopyOnWriteArrayList](http://www.baeldung.com/java-copy-on-write-arraylist)
- [Guide to the Java Phaser](http://www.baeldung.com/java-phaser)
- [Guide to Synchronized Keyword in Java](http://www.baeldung.com/java-synchronized)
- [An Introduction to Atomic Variables in Java](http://www.baeldung.com/java-atomic-variables)
- [CyclicBarrier in Java](http://www.baeldung.com/java-cyclic-barrier)
- [Guide to Volatile Keyword in Java](http://www.baeldung.com/java-volatile)
- [Overview of the java.util.concurrent](http://www.baeldung.com/java-util-concurrent)
- [Semaphores in Java](http://www.baeldung.com/java-semaphore)

237
core-java-concurrency/pom.xml Normal file
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@ -0,0 +1,237 @@
<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>core-java-concurrency</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>core-java-concurrency</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<!-- utils -->
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.awaitility</groupId>
<artifactId>awaitility</artifactId>
<version>${avaitility.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>core-java-concurrency</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>libs/</classpathPrefix>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
<archive>
<manifest>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>true</shadedArtifactAttached>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
<executions>
<execution>
<configuration>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
<attachToBuild>true</attachToBuild>
<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
</configuration>
<goals>
<goal>one-jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>spring-boot</classifier>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<phase>integration-test</phase>
<goals>
<goal>test</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<includes>
<include>**/*IntegrationTest.java</include>
</includes>
</configuration>
</execution>
</executions>
<configuration>
<systemPropertyVariables>
<test.mime>json</test.mime>
</systemPropertyVariables>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<properties>
<!-- util -->
<guava.version>21.0</guava.version>
<commons-lang3.version>3.5</commons-lang3.version>
<commons-math3.version>3.6.1</commons-math3.version>
<commons-io.version>2.5</commons-io.version>
<commons-collections4.version>4.1</commons-collections4.version>
<collections-generic.version>4.01</collections-generic.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
</properties>
</project>

34
core-java-concurrency/src/main/java/com/baeldung/concurrent/Scheduledexecutorservice/ScheduledExecutorServiceDemo.java Normal file
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@ -0,0 +1,34 @@
package com.baeldung.concurrent.Scheduledexecutorservice;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
public class ScheduledExecutorServiceDemo {
public void execute() {
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
ScheduledFuture<?> scheduledFuture = executorService.schedule(() -> {
// Task
}, 1, TimeUnit.SECONDS);
executorService.scheduleAtFixedRate(() -> {
// Task
}, 1, 10, TimeUnit.SECONDS);
executorService.scheduleWithFixedDelay(() -> {
// Task
}, 1, 10, TimeUnit.SECONDS);
Future<String> future = executorService.schedule(() -> {
// Task
return "Hellow world";
}, 1, TimeUnit.SECONDS);
executorService.shutdown();
}
}

13
core-java-concurrency/src/main/java/com/baeldung/concurrent/atomic/SafeCounterWithLock.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.concurrent.atomic;
public class SafeCounterWithLock {
private volatile int counter;
int getValue() {
return counter;
}
synchronized void increment() {
counter++;
}
}

21
core-java-concurrency/src/main/java/com/baeldung/concurrent/atomic/SafeCounterWithoutLock.java Normal file
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@ -0,0 +1,21 @@
package com.baeldung.concurrent.atomic;
import java.util.concurrent.atomic.AtomicInteger;
public class SafeCounterWithoutLock {
private final AtomicInteger counter = new AtomicInteger(0);
int getValue() {
return counter.get();
}
void increment() {
while(true) {
int existingValue = getValue();
int newValue = existingValue + 1;
if(counter.compareAndSet(existingValue, newValue)) {
return;
}
}
}
}

13
core-java-concurrency/src/main/java/com/baeldung/concurrent/atomic/UnsafeCounter.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.concurrent.atomic;
public class UnsafeCounter {
private int counter;
int getValue() {
return counter;
}
void increment() {
counter++;
}
}

0
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/BlockingQueueUsage.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/blockingqueue/BlockingQueueUsage.java
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0
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersConsumer.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersConsumer.java
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6
core-java/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersProducer.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/blockingqueue/NumbersProducer.java
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@ -19,13 +19,15 @@ public class NumbersProducer implements Runnable {
try {
generateNumbers();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
Thread.currentThread()
.interrupt();
}
}
private void generateNumbers() throws InterruptedException {
for (int i = 0; i < 100; i++) {
numbersQueue.put(ThreadLocalRandom.current().nextInt(100));
numbersQueue.put(ThreadLocalRandom.current()
.nextInt(100));
}
for (int j = 0; j < poisonPillPerProducer; j++) {
numbersQueue.put(poisonPill);

0
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/BrokenWorker.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/countdownlatch/BrokenWorker.java
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0
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/WaitingWorker.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/countdownlatch/WaitingWorker.java
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0
core-java/src/main/java/com/baeldung/concurrent/countdownlatch/Worker.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/countdownlatch/Worker.java
View File

12
core-java/src/main/java/com/baeldung/concurrent/cyclicbarrier/CyclicBarrierDemo.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/cyclicbarrier/CyclicBarrierDemo.java
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@ -15,14 +15,12 @@ public class CyclicBarrierDemo {
private int NUM_PARTIAL_RESULTS;
private int NUM_WORKERS;
private void runSimulation(int numWorkers, int numberOfPartialResults) {
NUM_PARTIAL_RESULTS = numberOfPartialResults;
NUM_WORKERS = numWorkers;
cyclicBarrier = new CyclicBarrier(NUM_WORKERS, new AggregatorThread());
System.out.println("Spawning " + NUM_WORKERS + " worker threads to compute "
+ NUM_PARTIAL_RESULTS + " partial results each");
System.out.println("Spawning " + NUM_WORKERS + " worker threads to compute " + NUM_PARTIAL_RESULTS + " partial results each");
for (int i = 0; i < NUM_WORKERS; i++) {
Thread worker = new Thread(new NumberCruncherThread());
worker.setName("Thread " + i);
@ -38,8 +36,7 @@ public class CyclicBarrierDemo {
List<Integer> partialResult = new ArrayList<>();
for (int i = 0; i < NUM_PARTIAL_RESULTS; i++) {
Integer num = random.nextInt(10);
System.out.println(thisThreadName
+ ": Crunching some numbers! Final result - " + num);
System.out.println(thisThreadName + ": Crunching some numbers! Final result - " + num);
partialResult.add(num);
}
partialResults.add(partialResult);
@ -57,13 +54,12 @@ public class CyclicBarrierDemo {
@Override
public void run() {
String thisThreadName = Thread.currentThread().getName();
System.out.println(thisThreadName + ": Computing final sum of " + NUM_WORKERS
+ " workers, having " + NUM_PARTIAL_RESULTS + " results each.");
System.out.println(thisThreadName + ": Computing final sum of " + NUM_WORKERS + " workers, having " + NUM_PARTIAL_RESULTS + " results each.");
int sum = 0;
for (List<Integer> threadResult : partialResults) {
System.out.print("Adding ");
for (Integer partialResult : threadResult) {
System.out.print(partialResult+" ");
System.out.print(partialResult + " ");
sum += partialResult;
}
System.out.println();

24
core-java-concurrency/src/main/java/com/baeldung/concurrent/cyclicbarrier/CyclicBarrierExample.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.concurrent.cyclicbarrier;
import java.util.concurrent.CyclicBarrier;
public class CyclicBarrierExample {
public void start() {
CyclicBarrier cyclicBarrier = new CyclicBarrier(3, () -> {
// Task
System.out.println("All previous tasks are completed");
});
Thread t1 = new Thread(new Task(cyclicBarrier), "T1");
Thread t2 = new Thread(new Task(cyclicBarrier), "T2");
Thread t3 = new Thread(new Task(cyclicBarrier), "T3");
if (!cyclicBarrier.isBroken()) {
t1.start();
t2.start();
t3.start();
}
}
}

24
core-java-concurrency/src/main/java/com/baeldung/concurrent/cyclicbarrier/Task.java Normal file
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@ -0,0 +1,24 @@
package com.baeldung.concurrent.cyclicbarrier;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
public class Task implements Runnable {
private CyclicBarrier barrier;
public Task(CyclicBarrier barrier) {
this.barrier = barrier;
}
@Override
public void run() {
try {
System.out.println("Thread : " + Thread.currentThread().getName() + " is waiting");
barrier.await();
System.out.println("Thread : " + Thread.currentThread().getName() + " is released");
} catch (InterruptedException | BrokenBarrierException e) {
e.printStackTrace();
}
}
}

5
core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayObject.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/delayqueue/DelayObject.java
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@ -27,9 +27,6 @@ public class DelayObject implements Delayed {
@Override
public String toString() {
return "{" +
"data='" + data + '\'' +
", startTime=" + startTime +
'}';
return "{" + "data='" + data + '\'' + ", startTime=" + startTime + '}';
}
}

0
core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueConsumer.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueConsumer.java
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0
core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueProducer.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueProducer.java
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0
core-java/src/main/java/com/baeldung/concurrent/diningphilosophers/DiningPhilosophers.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/diningphilosophers/DiningPhilosophers.java
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3
core-java/src/main/java/com/baeldung/concurrent/diningphilosophers/Philosopher.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/diningphilosophers/Philosopher.java
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@ -15,7 +15,8 @@ public class Philosopher implements Runnable {
Thread.sleep(((int) (Math.random() * 100)));
}
@Override public void run() {
@Override
public void run() {
try {
while (true) {
doAction(System.nanoTime() + ": Thinking"); // thinking

14
core-java-concurrency/src/main/java/com/baeldung/concurrent/executor/ExecutorDemo.java Normal file
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@ -0,0 +1,14 @@
package com.baeldung.concurrent.executor;
import java.util.concurrent.Executor;
public class ExecutorDemo {
public void execute() {
Executor executor = new Invoker();
executor.execute(()->{
// task to be performed
});
}
}

12
core-java-concurrency/src/main/java/com/baeldung/concurrent/executor/Invoker.java Normal file
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@ -0,0 +1,12 @@
package com.baeldung.concurrent.executor;
import java.util.concurrent.Executor;
public class Invoker implements Executor {
@Override
public void execute(Runnable r) {
r.run();
}
}

27
core-java-concurrency/src/main/java/com/baeldung/concurrent/executorservice/ExecutorServiceDemo.java Normal file
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@ -0,0 +1,27 @@
package com.baeldung.concurrent.executorservice;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
public class ExecutorServiceDemo {
ExecutorService executor = Executors.newFixedThreadPool(10);
public void execute() {
executor.submit(() -> {
new Task();
});
executor.shutdown();
executor.shutdownNow();
try {
executor.awaitTermination(20l, TimeUnit.NANOSECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

10
core-java-concurrency/src/main/java/com/baeldung/concurrent/executorservice/Task.java Normal file
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@ -0,0 +1,10 @@
package com.baeldung.concurrent.executorservice;
public class Task implements Runnable {
@Override
public void run() {
// task details
}
}

0
core-java/src/main/java/com/baeldung/concurrent/future/FactorialSquareCalculator.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/future/FactorialSquareCalculator.java
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44
core-java-concurrency/src/main/java/com/baeldung/concurrent/future/FutureDemo.java Normal file
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@ -0,0 +1,44 @@
package com.baeldung.concurrent.future;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class FutureDemo {
public String invoke() {
String str = null;
ExecutorService executorService = Executors.newFixedThreadPool(10);
Future<String> future = executorService.submit(() -> {
// Task
Thread.sleep(10000l);
return "Hellow world";
});
future.cancel(false);
try {
future.get(20, TimeUnit.SECONDS);
} catch (InterruptedException | ExecutionException | TimeoutException e1) {
e1.printStackTrace();
}
if (future.isDone() && !future.isCancelled()) {
try {
str = future.get();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
}
return str;
}
}

0
core-java/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/future/SquareCalculator.java
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0
core-java/src/main/java/com/baeldung/concurrent/locks/ReentrantLockWithCondition.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/locks/ReentrantLockWithCondition.java
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0
core-java/src/main/java/com/baeldung/concurrent/locks/SharedObjectWithLock.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/locks/SharedObjectWithLock.java
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0
core-java/src/main/java/com/baeldung/concurrent/locks/StampedLockDemo.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/locks/StampedLockDemo.java
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0
core-java/src/main/java/com/baeldung/concurrent/locks/SynchronizedHashMapWithRWLock.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/locks/SynchronizedHashMapWithRWLock.java
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0
core-java/src/main/java/com/baeldung/concurrent/phaser/LongRunningAction.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/phaser/LongRunningAction.java
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22
core-java-concurrency/src/main/java/com/baeldung/concurrent/semaphore/SemaPhoreDemo.java Normal file
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@ -0,0 +1,22 @@
package com.baeldung.concurrent.semaphore;
import java.util.concurrent.Semaphore;
public class SemaPhoreDemo {
static Semaphore semaphore = new Semaphore(10);
public void execute() throws InterruptedException {
System.out.println("Available permit : " + semaphore.availablePermits());
System.out.println("Number of threads waiting to acquire: " + semaphore.getQueueLength());
if (semaphore.tryAcquire()) {
semaphore.acquire();
// perform some critical operations
semaphore.release();
}
}
}

0
core-java/src/main/java/com/baeldung/concurrent/semaphores/CounterUsingMutex.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/semaphores/CounterUsingMutex.java
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0
core-java/src/main/java/com/baeldung/concurrent/semaphores/DelayQueueUsingTimedSemaphore.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/semaphores/DelayQueueUsingTimedSemaphore.java
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0
core-java/src/main/java/com/baeldung/concurrent/semaphores/LoginQueueUsingSemaphore.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/semaphores/LoginQueueUsingSemaphore.java
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0
core-java/src/main/java/com/baeldung/concurrent/skiplist/Event.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/skiplist/Event.java
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0
core-java/src/main/java/com/baeldung/concurrent/skiplist/EventWindowSort.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/skiplist/EventWindowSort.java
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0
core-java/src/main/java/com/baeldung/concurrent/sleepwait/ThreadA.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/sleepwait/ThreadA.java
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0
core-java/src/main/java/com/baeldung/concurrent/sleepwait/ThreadB.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/sleepwait/ThreadB.java
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0
core-java/src/main/java/com/baeldung/concurrent/sleepwait/WaitSleepExample.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/sleepwait/WaitSleepExample.java
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0
core-java/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedBlocks.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedBlocks.java
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0
core-java/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedMethods.java → core-java-concurrency/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedMethods.java
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23
core-java-concurrency/src/main/java/com/baeldung/concurrent/threadfactory/BaeldungThreadFactory.java Normal file
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@ -0,0 +1,23 @@
package com.baeldung.concurrent.threadfactory;
import java.util.concurrent.ThreadFactory;
public class BaeldungThreadFactory implements ThreadFactory {
private int threadId;
private String name;
public BaeldungThreadFactory(String name) {
threadId = 1;
this.name = name;
}
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(r, name + "-Thread_" + threadId);
System.out.println("created new thread with id : " + threadId + " and name : " + t.getName());
threadId++;
return t;
}
}

13
core-java-concurrency/src/main/java/com/baeldung/concurrent/threadfactory/Demo.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.concurrent.threadfactory;
public class Demo {
public void execute() {
BaeldungThreadFactory factory = new BaeldungThreadFactory("BaeldungThreadFactory");
for (int i = 0; i < 10; i++) {
Thread t = factory.newThread(new Task());
t.start();
}
}
}

10
core-java-concurrency/src/main/java/com/baeldung/concurrent/threadfactory/Task.java Normal file
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@ -0,0 +1,10 @@
package com.baeldung.concurrent.threadfactory;
public class Task implements Runnable {
@Override
public void run() {
// task details
}
}

13
core-java-concurrency/src/main/java/com/baeldung/concurrent/volatilekeyword/SharedObject.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.concurrent.volatilekeyword;
public class SharedObject {
private volatile int count=0;
void increamentCount(){
count++;
}
public int getCount(){
return count;
}
}

6
core-java/src/main/java/com/baeldung/threadlocal/Context.java → core-java-concurrency/src/main/java/com/baeldung/threadlocal/Context.java
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@ -4,14 +4,14 @@ package com.baeldung.threadlocal;
public class Context {
private final String userName;
public Context(String userName) {
Context(String userName) {
this.userName = userName;
}
@Override
public String toString() {
return "Context{" +
"userNameSecret='" + userName + '\'' +
'}';
"userNameSecret='" + userName + '\'' +
'}';
}
}

4
core-java/src/main/java/com/baeldung/threadlocal/SharedMapWithUserContext.java → core-java-concurrency/src/main/java/com/baeldung/threadlocal/SharedMapWithUserContext.java
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@ -5,11 +5,11 @@ import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class SharedMapWithUserContext implements Runnable {
public final static Map<Integer, Context> userContextPerUserId = new ConcurrentHashMap<>();
final static Map<Integer, Context> userContextPerUserId = new ConcurrentHashMap<>();
private final Integer userId;
private UserRepository userRepository = new UserRepository();
public SharedMapWithUserContext(Integer userId) {
SharedMapWithUserContext(Integer userId) {
this.userId = userId;
}

2
core-java/src/main/java/com/baeldung/threadlocal/ThreadLocalWithUserContext.java → core-java-concurrency/src/main/java/com/baeldung/threadlocal/ThreadLocalWithUserContext.java
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@ -10,7 +10,7 @@ public class ThreadLocalWithUserContext implements Runnable {
private final Integer userId;
private UserRepository userRepository = new UserRepository();
public ThreadLocalWithUserContext(Integer userId) {
ThreadLocalWithUserContext(Integer userId) {
this.userId = userId;
}

2
core-java/src/main/java/com/baeldung/threadlocal/UserRepository.java → core-java-concurrency/src/main/java/com/baeldung/threadlocal/UserRepository.java
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@ -4,7 +4,7 @@ import java.util.UUID;
public class UserRepository {
public String getUserNameForUserId(Integer userId) {
String getUserNameForUserId(Integer userId) {
return UUID.randomUUID().toString();
}
}

8
core-java/src/main/java/com/baeldung/threadpool/CountingTask.java → core-java-concurrency/src/main/java/com/baeldung/threadpool/CountingTask.java
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@ -2,19 +2,21 @@ package com.baeldung.threadpool;
import java.util.concurrent.ForkJoinTask;
import java.util.concurrent.RecursiveTask;
import java.util.stream.Collectors;
public class CountingTask extends RecursiveTask<Integer> {
private final TreeNode node;
public CountingTask(TreeNode node) {
CountingTask(TreeNode node) {
this.node = node;
}
@Override
protected Integer compute() {
return node.value + node.children.stream().map(childNode -> new CountingTask(childNode).fork()).collect(Collectors.summingInt(ForkJoinTask::join));
return node.getValue() + node.getChildren().stream()
.map(childNode -> new CountingTask(childNode).fork())
.mapToInt(ForkJoinTask::join)
.sum();
}
}

0
core-java/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java → core-java-concurrency/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java
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25
core-java-concurrency/src/main/java/com/baeldung/threadpool/TreeNode.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.threadpool;
import com.google.common.collect.Sets;
import java.util.Set;
public class TreeNode {
private int value;
private Set<TreeNode> children;
TreeNode(int value, TreeNode... children) {
this.value = value;
this.children = Sets.newHashSet(children);
}
public int getValue() {
return value;
}
public Set<TreeNode> getChildren() {
return children;
}
}

7
core-java/src/main/java/com/baeldung/transferqueue/Consumer.java → core-java-concurrency/src/main/java/com/baeldung/transferqueue/Consumer.java
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@ -9,13 +9,12 @@ import java.util.concurrent.atomic.AtomicInteger;
public class Consumer implements Runnable {
private static final Logger LOG = LoggerFactory.getLogger(Consumer.class);
private final TransferQueue<String> transferQueue;
private final String name;
private final int numberOfMessagesToConsume;
public final AtomicInteger numberOfConsumedMessages = new AtomicInteger();
final int numberOfMessagesToConsume;
final AtomicInteger numberOfConsumedMessages = new AtomicInteger();
public Consumer(TransferQueue<String> transferQueue, String name, int numberOfMessagesToConsume) {
Consumer(TransferQueue<String> transferQueue, String name, int numberOfMessagesToConsume) {
this.transferQueue = transferQueue;
this.name = name;
this.numberOfMessagesToConsume = numberOfMessagesToConsume;

6
core-java/src/main/java/com/baeldung/transferqueue/Producer.java → core-java-concurrency/src/main/java/com/baeldung/transferqueue/Producer.java
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@ -12,10 +12,10 @@ public class Producer implements Runnable {
private final TransferQueue<String> transferQueue;
private final String name;
private final Integer numberOfMessagesToProduce;
public final AtomicInteger numberOfProducedMessages = new AtomicInteger();
final Integer numberOfMessagesToProduce;
final AtomicInteger numberOfProducedMessages = new AtomicInteger();
public Producer(TransferQueue<String> transferQueue, String name, Integer numberOfMessagesToProduce) {
Producer(TransferQueue<String> transferQueue, String name, Integer numberOfMessagesToProduce) {
this.transferQueue = transferQueue;
this.name = name;
this.numberOfMessagesToProduce = numberOfMessagesToProduce;

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