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33
README.md
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@ -2,41 +2,22 @@
The "REST with Spring" Classes
==============================
Here's the Master Class of REST With Spring (price changes permanently next Friday): <br/>
**[>> THE REST WITH SPRING MASTER CLASS](http://www.baeldung.com/rest-with-spring-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=rws#master-class)**
Here's the Master Class of REST With Spring (along with the newly announced Boot 2 material): <br/>
**[>> THE REST WITH SPRING - MASTER CLASS](http://www.baeldung.com/rest-with-spring-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=rws#master-class)**
And here's the Master Class of Learn Spring Security: <br/>
**[>> LEARN SPRING SECURITY MASTER CLASS](http://www.baeldung.com/learn-spring-security-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=lss#master-class)**
**[>> LEARN SPRING SECURITY - MASTER CLASS](http://www.baeldung.com/learn-spring-security-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=lss#master-class)**
Spring Tutorials
Java and Spring Tutorials
================
This project is **a collection of small and focused tutorials** each covering a single and well defined area of development.
Most of the tutorial projects are focused on the `Spring Framework` (and `Spring Security`).
This project is **a collection of small and focused tutorials** - each covering a single and well defined area of development in the Java ecosystem.
A strong focus of these is, of course, the Spring Framework - Spring, Spring Boot and Spring Securiyt.
In additional to Spring, the following technologies are in focus: `core Java`, `Jackson`, `HttpClient`, `Guava`.
Building the project
====================
To do the full build, do: `mvn install -Pdefault -Dgib.enabled=false`
Working with the code in Eclipse
================================
Any IDE can be used to work with the projects, but if you're using Eclipse, consider the following.
- import the included **formatter** in Eclipse:
`https://github.com/eugenp/tutorials/tree/master/eclipse`
CI - Jenkins
================================
This tutorials project is being built **[>> HERE](https://rest-security.ci.cloudbees.com/job/tutorials-unit/)**
### Relevant Articles:
================================
- [Apache Maven Standard Directory Layout](http://www.baeldung.com/maven-directory-structure)
- [Apache Maven Tutorial](http://www.baeldung.com/maven)
- [Designing a User Friendly Java Library](http://www.baeldung.com/design-a-user-friendly-java-library)

2
algorithms/src/main/java/com/baeldung/algorithms/kthlargest/FindKthLargest.java
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@ -98,7 +98,7 @@ public class FindKthLargest {
private int randomPartition(Integer arr[], int left, int right) {
int n = right - left + 1;
int pivot = (int) (Math.random()) % n;
int pivot = (int) (Math.random() * n);
swap(arr, left + pivot, right);
return partition(arr, left, right);
}

39
algorithms/src/main/java/com/baeldung/algorithms/quicksort/QuickSort.java Normal file
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@ -0,0 +1,39 @@
package com.baeldung.algorithms.quicksort;
public class QuickSort {
public static void quickSort(int arr[], int begin, int end)
{
if (begin < end) {
int partitionIndex = partition(arr, begin, end);
// Recursively sort elements of the 2 sub-arrays
quickSort(arr, begin, partitionIndex-1);
quickSort(arr, partitionIndex+1, end);
}
}
private static int partition(int arr[], int begin, int end)
{
int pivot = arr[end];
int i = (begin-1);
for (int j=begin; j<end; j++)
{
if (arr[j] <= pivot) {
i++;
int swapTemp = arr[i];
arr[i] = arr[j];
arr[j] = swapTemp;
}
}
int swapTemp = arr[i+1];
arr[i+1] = arr[end];
arr[end] = swapTemp;
return i+1;
}
}

38
algorithms/src/main/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSort.java Normal file
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@ -0,0 +1,38 @@
package com.baeldung.algorithms.quicksort;
public class ThreeWayQuickSort {
public static void threeWayQuickSort(int[] a, int begin, int end)
{
if (end <= begin) return;
// partition
int i = begin;
int less = begin;
int greater = end;
while (i <= greater){
if (a[i] < a[less]) {
int tmp = a[i];
a[i] = a[less];
a[less] = tmp;
i++;
less++;
}
else if (a[less] < a[i]) {
int tmp = a[i];
a[i] = a[greater];
a[greater] = tmp;
greater--;
}
else {
i++;
}
}
threeWayQuickSort(a, begin, less - 1);
threeWayQuickSort(a, greater + 1, end);
}
}

17
algorithms/src/test/java/com/baeldung/algorithms/quicksort/QuickSortUnitTest.java Normal file
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@ -0,0 +1,17 @@
package com.baeldung.algorithms.quicksort;
import com.baeldung.algorithms.quicksort.QuickSort;
import org.junit.Assert;
import org.junit.Test;
public class QuickSortUnitTest {
@Test
public void givenIntegerArray_whenSortedWithQuickSort_thenGetSortedArray() {
int[] actual = { 9, 5, 1, 0, 6, 2, 3, 4, 7, 8 };
int[] expected = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
QuickSort.quickSort(actual, 0, actual.length-1);
Assert.assertArrayEquals(expected, actual);
}
}

15
algorithms/src/test/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSortUnitTest.java Normal file
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@ -0,0 +1,15 @@
package com.baeldung.algorithms.quicksort;
import org.junit.Assert;
import org.junit.Test;
public class ThreeWayQuickSortUnitTest {
@Test
public void givenIntegerArray_whenSortedWithThreeWayQuickSort_thenGetSortedArray() {
int[] actual = { 3, 5, 5, 5, 3, 7, 7, 3, 5, 5, 7, 3, 3 };
int[] expected = { 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7 };
ThreeWayQuickSort.threeWayQuickSort(actual, 0, actual.length-1);
Assert.assertArrayEquals(expected, actual);
}
}

46
apache-geode/pom.xml Normal file
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@ -0,0 +1,46 @@
<?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-geode</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<geode.core>1.6.0</geode.core>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.geode</groupId>
<artifactId>geode-core</artifactId>
<version>${geode.core}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>RELEASE</version>
</dependency>
</dependencies>
</project>

78
apache-geode/src/main/java/com/baeldung/geode/Customer.java Normal file
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@ -0,0 +1,78 @@
package com.baeldung.geode;
import java.io.Serializable;
import java.util.Objects;
public class Customer implements Serializable {
private static final long serialVersionUID = -7482516011038799900L;
private CustomerKey key;
private String firstName;
private String lastName;
private Integer age;
public Customer() {
}
public Customer(String firstName, String lastName, int age) {
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
public Customer(CustomerKey key, String firstName, String lastName, int age) {
this(firstName, lastName, age);
this.key = key;
}
// setters and getters
public static long getSerialVersionUID() {
return serialVersionUID;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Customer{" + "firstName='" + firstName + '\'' + ", lastName='" + lastName + '\'' + ", age=" + age + '}';
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Customer customer = (Customer) o;
return Objects.equals(firstName, customer.firstName) && Objects.equals(lastName, customer.lastName) && Objects.equals(age, customer.age);
}
@Override
public int hashCode() {
return Objects.hash(firstName, lastName, age);
}
}

57
apache-geode/src/main/java/com/baeldung/geode/CustomerKey.java Normal file
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@ -0,0 +1,57 @@
package com.baeldung.geode;
import java.io.Serializable;
public class CustomerKey implements Serializable {
private static final long serialVersionUID = -3529253035303792458L;
private long id;
private String country;
public CustomerKey(long id) {
this.id = id;
this.country = "USA";
}
public CustomerKey(long id, String country) {
this.id = id;
this.country = country;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
CustomerKey that = (CustomerKey) o;
if (id != that.id)
return false;
return country != null ? country.equals(that.country) : that.country == null;
}
@Override
public int hashCode() {
int result = (int) (id ^ (id >>> 32));
result = 31 * result + (country != null ? country.hashCode() : 0);
return result;
}
}

34
apache-geode/src/main/java/com/baeldung/geode/functions/UpperCaseNames.java Normal file
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@ -0,0 +1,34 @@
package com.baeldung.geode.functions;
import com.baeldung.geode.Customer;
import com.baeldung.geode.CustomerKey;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.execute.Function;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.cache.execute.RegionFunctionContext;
import java.util.Map;
public class UpperCaseNames implements Function<Boolean> {
private static final long serialVersionUID = -8946294032165677602L;
@Override
public void execute(FunctionContext<Boolean> context) {
RegionFunctionContext regionContext = (RegionFunctionContext) context;
Region<CustomerKey, Customer> region = regionContext.getDataSet();
for (Map.Entry<CustomerKey, Customer> entry : region.entrySet()) {
Customer customer = entry.getValue();
customer.setFirstName(customer.getFirstName()
.toUpperCase());
}
context.getResultSender()
.lastResult(true);
}
@Override
public String getId() {
return getClass().getName();
}
}

110
apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java Normal file
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@ -0,0 +1,110 @@
package com.baeldung.geode;
import com.baeldung.geode.functions.UpperCaseNames;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.client.ClientCache;
import org.apache.geode.cache.client.ClientCacheFactory;
import org.apache.geode.cache.client.ClientRegionShortcut;
import org.apache.geode.cache.execute.Execution;
import org.apache.geode.cache.execute.FunctionService;
import org.apache.geode.cache.query.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.assertEquals;
public class GeodeSamplesIntegrationTest {
ClientCache cache = null;
Region<String, String> region = null;
Region<Integer, Customer> queryRegion = null;
Region<CustomerKey, Customer> customerRegion = null;
@Before
public void connect() {
this.cache = new ClientCacheFactory().addPoolLocator("localhost", 10334)
.create();
this.region = this.cache.<String, String> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
.create("baeldung");
this.customerRegion = this.cache.<CustomerKey, Customer> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
.create("baeldung-customers");
}
@After
public void cleanup() {
this.cache.close();
}
@Test
public void whenSendMessageToRegion_thenMessageSavedSuccessfully() {
this.region.put("1", "Hello");
this.region.put("2", "Baeldung");
assertEquals("Hello", region.get("1"));
assertEquals("Baeldung", region.get("2"));
}
@Test
public void whenPutMultipleValuesAtOnce_thenValuesSavedSuccessfully() {
Supplier<Stream<String>> keys = () -> Stream.of("A", "B", "C", "D", "E");
Map<String, String> values = keys.get()
.collect(Collectors.toMap(Function.identity(), String::toLowerCase));
this.region.putAll(values);
keys.get()
.forEach(k -> assertEquals(k.toLowerCase(), this.region.get(k)));
}
@Test
public void whenPutCustomKey_thenValuesSavedSuccessfully() {
CustomerKey key = new CustomerKey(123);
Customer customer = new Customer(key, "William", "Russell", 35);
Map<CustomerKey, Customer> customerInfo = new HashMap<>();
customerInfo.put(key, customer);
this.customerRegion.putAll(customerInfo);
Customer storedCustomer = this.customerRegion.get(key);
assertEquals("William", storedCustomer.getFirstName());
assertEquals("Russell", storedCustomer.getLastName());
}
@Test
public void whenFindACustomerUsingOQL_thenCorrectCustomerObject() throws NameResolutionException, TypeMismatchException, QueryInvocationTargetException, FunctionDomainException {
Map<CustomerKey, Customer> data = new HashMap<>();
data.put(new CustomerKey(1), new Customer("Gheorge", "Manuc", 36));
data.put(new CustomerKey(2), new Customer("Allan", "McDowell", 43));
this.customerRegion.putAll(data);
QueryService queryService = this.cache.getQueryService();
String query = "select * from /baeldung-customers c where c.firstName = 'Allan'";
SelectResults<Customer> queryResults = (SelectResults<Customer>) queryService.newQuery(query)
.execute();
assertEquals(1, queryResults.size());
}
@Test
public void whenExecuteUppercaseNames_thenCustomerNamesAreUppercased() {
Execution execution = FunctionService.onRegion(this.customerRegion);
execution.execute(UpperCaseNames.class.getName());
Customer customer = this.customerRegion.get(new CustomerKey(1));
assertEquals("GHEORGE", customer.getFirstName());
}
}

31
core-java-8/src/test/java/com/baeldung/java8/Java8SortUnitTest.java
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@ -1,16 +1,18 @@
package com.baeldung.java8;
import com.baeldung.java8.entity.Human;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
import org.junit.Assert;
import org.junit.Test;
import static org.hamcrest.Matchers.equalTo;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import static org.hamcrest.Matchers.equalTo;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.java8.entity.Human;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
public class Java8SortUnitTest {
@ -111,5 +113,22 @@ public class Java8SortUnitTest {
humans.sort(Comparator.comparing(Human::getName));
Assert.assertThat(humans.get(0), equalTo(new Human("Jack", 12)));
}
@Test
public final void givenStreamNaturalOrdering_whenSortingEntitiesByName_thenCorrectlySorted() {
final List<String> letters = Lists.newArrayList("B", "A", "C");
final List<String> sortedLetters = letters.stream().sorted().collect(Collectors.toList());
Assert.assertThat(sortedLetters.get(0), equalTo("A"));
}
@Test
public final void givenStreamCustomOrdering_whenSortingEntitiesByName_thenCorrectlySorted() {
final List<Human> humans = Lists.newArrayList(new Human("Sarah", 10), new Human("Jack", 12));
final Comparator<Human> nameComparator = (h1, h2) -> h1.getName().compareTo(h2.getName());
final List<Human> sortedHumans = humans.stream().sorted(nameComparator).collect(Collectors.toList());
Assert.assertThat(sortedHumans.get(0), equalTo(new Human("Jack", 12)));
}
}

41
core-java-8/src/test/java/com/baeldung/stream/conditional/StreamForEachIfElseUnitTest.java Normal file
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@ -0,0 +1,41 @@
package com.baeldung.stream.conditional;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
import org.junit.Assert;
import org.junit.Test;
public class StreamForEachIfElseUnitTest {
@Test
public final void givenIntegerStream_whenCheckingIntegerParityWithIfElse_thenEnsureCorrectParity() {
List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
ints.stream()
.forEach(i -> {
if (i.intValue() % 2 == 0) {
Assert.assertTrue(i.intValue() + " is not even", i.intValue() % 2 == 0);
} else {
Assert.assertTrue(i.intValue() + " is not odd", i.intValue() % 2 != 0);
}
});
}
@Test
public final void givenIntegerStream_whenCheckingIntegerParityWithStreamFilter_thenEnsureCorrectParity() {
List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Stream<Integer> evenIntegers = ints.stream()
.filter(i -> i.intValue() % 2 == 0);
Stream<Integer> oddIntegers = ints.stream()
.filter(i -> i.intValue() % 2 != 0);
evenIntegers.forEach(i -> Assert.assertTrue(i.intValue() + " is not even", i.intValue() % 2 == 0));
oddIntegers.forEach(i -> Assert.assertTrue(i.intValue() + " is not odd", i.intValue() % 2 != 0));
}
}

1
core-java/README.md
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@ -25,7 +25,6 @@
- [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)
- [How to Design a Genetic Algorithm in Java](http://www.baeldung.com/java-genetic-algorithm)
- [Spring Security – Cache Control Headers](http://www.baeldung.com/spring-security-cache-control-headers)
- [Basic Introduction to JMX](http://www.baeldung.com/java-management-extensions)
- [AWS Lambda With Java](http://www.baeldung.com/java-aws-lambda)
- [Introduction to Nashorn](http://www.baeldung.com/java-nashorn)

9
core-java/src/main/java/com/baeldung/memoryleaks/equalshashcode/Person.java Executable file
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@ -0,0 +1,9 @@
package com.baeldung.memoryleaks.equalshashcode;
public class Person {
public String name;
public Person(String name) {
this.name = name;
}
}

25
core-java/src/main/java/com/baeldung/memoryleaks/equalshashcode/PersonOptimized.java Executable file
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@ -0,0 +1,25 @@
package com.baeldung.memoryleaks.equalshashcode;
public class PersonOptimized {
public String name;
public PersonOptimized(String name) {
this.name = name;
}
@Override
public boolean equals(Object o) {
if (o == this) return true;
if (!(o instanceof PersonOptimized)) {
return false;
}
PersonOptimized person = (PersonOptimized) o;
return person.name.equals(name);
}
@Override
public int hashCode() {
int result = 17;
result = 31 * result + name.hashCode();
return result;
}}

32
core-java/src/main/java/com/baeldung/memoryleaks/finalize/BulkyObject.java Executable file
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@ -0,0 +1,32 @@
package com.baeldung.memoryleaks.finalize;
import java.nio.charset.Charset;
import java.util.Random;
public class BulkyObject {
private String data[];
public BulkyObject() {
data = new String[1000000];
for(int i=0; i<1000000; i++) {
data[i] = getRandomString();
}
}
private String getRandomString() {
byte[] array = new byte[1000];
new Random().nextBytes(array);
return new String(array, Charset.forName("UTF-8"));
}
@Override
public void finalize() {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Finalizer called");
}
}

22
core-java/src/main/java/com/baeldung/memoryleaks/finalize/BulkyObjectOptimized.java Normal file
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@ -0,0 +1,22 @@
package com.baeldung.memoryleaks.finalize;
import java.nio.charset.Charset;
import java.util.Random;
public class BulkyObjectOptimized {
private String data[];
public BulkyObjectOptimized() {
data = new String[1000000];
for(int i=0; i<1000000; i++) {
data[i] = getRandomString();
}
}
private String getRandomString() {
byte[] array = new byte[1000];
new Random().nextBytes(array);
return new String(array, Charset.forName("UTF-8"));
}
}

22
core-java/src/main/java/com/baeldung/memoryleaks/innerclass/BulkyObject.java Executable file
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@ -0,0 +1,22 @@
package com.baeldung.memoryleaks.innerclass;
import java.nio.charset.Charset;
import java.util.Random;
public class BulkyObject {
private String data[];
public BulkyObject() {
data = new String[1000000];
for(int i=0; i<1000000; i++) {
data[i] = getRandomString();
}
}
private String getRandomString() {
byte[] array = new byte[1000];
new Random().nextBytes(array);
return new String(array, Charset.forName("UTF-8"));
}
}

17
core-java/src/main/java/com/baeldung/memoryleaks/innerclass/InnerClassDriver.java Executable file
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@ -0,0 +1,17 @@
package com.baeldung.memoryleaks.innerclass;
public class InnerClassDriver {
public static InnerClassWrapper.SimpleInnerClass getSimpleInnerClassObj() {
return new InnerClassWrapper().new SimpleInnerClass();
}
public static void main2(String[] args) {
InnerClassWrapper.SimpleInnerClass simpleInnerClassObj = getSimpleInnerClassObj();
System.out.println("Debug point");
}
public static void main(String[] args) {
StaticNestedClassWrapper.StaticNestedClass simpleInnerClassObj = new StaticNestedClassWrapper.StaticNestedClass();
System.out.println("Debug point");
}
}

10
core-java/src/main/java/com/baeldung/memoryleaks/innerclass/InnerClassWrapper.java Executable file
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@ -0,0 +1,10 @@
package com.baeldung.memoryleaks.innerclass;
public class InnerClassWrapper {
private BulkyObject bulkyObject = new BulkyObject();
public class SimpleInnerClass {
}
}

10
core-java/src/main/java/com/baeldung/memoryleaks/innerclass/StaticNestedClassWrapper.java Executable file
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@ -0,0 +1,10 @@
package com.baeldung.memoryleaks.innerclass;
public class StaticNestedClassWrapper {
private BulkyObject bulkyObject = new BulkyObject();
public static class StaticNestedClass {
}
}

17
core-java/src/main/java/com/baeldung/memoryleaks/internedstrings/InternedString.java Normal file
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@ -0,0 +1,17 @@
package com.baeldung.memoryleaks.internedstrings;
public class InternedString {
private static final String FILEPATH = "C:\\bigstring.txt";
public void readString() {
String s1 = ReadStringFromFileUtil.read(FILEPATH).intern();
String s2 = ReadStringFromFileUtil.read(FILEPATH).intern();
if (s1 == s2) {
System.out.println("Both the strings objects are same");
}
else {
System.out.println("Both the strings objects are different");
}
}
}

34
core-java/src/main/java/com/baeldung/memoryleaks/internedstrings/ReadStringFromFileUtil.java Normal file
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package com.baeldung.memoryleaks.internedstrings;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class ReadStringFromFileUtil {
public static String read(String fileName) {
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(fileName));
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append("\n");
line = br.readLine();
}
return sb.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
}

17
core-java/src/main/java/com/baeldung/memoryleaks/internedstrings/StringObject.java Normal file
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package com.baeldung.memoryleaks.internedstrings;
public class StringObject {
private static final String FILEPATH = "C:\\bigstring.txt";
public void readString() {
String s1 = ReadStringFromFileUtil.read(FILEPATH);
String s2 = ReadStringFromFileUtil.read(FILEPATH);
if (s1 == s2) {
System.out.println("Both the strings objects are same");
}
else {
System.out.println("Both the strings objects are different");
}
}
}

21
core-java/src/main/java/com/baeldung/memoryleaks/staticfields/NonStaticFieldsDemo.java Normal file
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package com.baeldung.memoryleaks.staticfields;
import java.util.ArrayList;
import java.util.List;
public class NonStaticFieldsDemo {
public List<Double> list = new ArrayList<>();
public void populateList() {
for (int i = 0; i < 10000000; i++) {
list.add(Math.random());
}
System.out.println("Debug Point 2");
}
public static void main(String[] args) {
System.out.println("Debug Point 1");
new NonStaticFieldsDemo().populateList();
System.out.println("Debug Point 3");
}
}

21
core-java/src/main/java/com/baeldung/memoryleaks/staticfields/StaticFieldsDemo.java Normal file
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package com.baeldung.memoryleaks.staticfields;
import java.util.ArrayList;
import java.util.List;
public class StaticFieldsDemo {
public static List<Double> list = new ArrayList<>();
public void populateList() {
for (int i = 0; i < 10000000; i++) {
list.add(Math.random());
}
System.out.println("Debug Point 2");
}
public static void main(String[] args) {
System.out.println("Debug Point 1");
new StaticFieldsDemo().populateList();
System.out.println("Debug Point 3");
}
}

8
core-java/src/main/java/com/baeldung/nth/root/calculator/NthRootCalculator.java Normal file
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package com.baeldung.nth.root.calculator;
public class NthRootCalculator
{
public Double calculate(Double base, Double n) {
return Math.pow(Math.E, Math.log(base)/n);
}
}

13
core-java/src/main/java/com/baeldung/nth/root/main/Main.java Normal file
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package com.baeldung.nth.root.main;
import com.baeldung.nth.root.calculator.NthRootCalculator;
public class Main {
public static void main(String[] args) {
NthRootCalculator calculator = new NthRootCalculator();
Double base = Double.parseDouble(args[0]);
Double n = Double.parseDouble(args[1]);
Double result = calculator.calculate(base, n);
System.out.println("The " + n + " root of " + base + " equals to " + result + ".");
}
}

33
core-java/src/test/java/com/baeldung/memoryleaks/equalshashcode/PersonMemoryLeakUnitTest.java Normal file
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package com.baeldung.memoryleaks.equalshashcode;
import static org.junit.Assert.assertTrue;
import java.util.HashMap;
import java.util.Map;
import org.junit.Ignore;
import org.junit.Test;
public class PersonMemoryLeakUnitTest {
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenMap_whenEqualsAndHashCodeNotOverridden_thenMemoryLeak() {
Map<Person, Integer> map = new HashMap<Person, Integer>();
for(int i=0; i<10000000; i++) {
map.put(new Person("jon"), 1);
}
assertTrue(map.size() > 1);
System.out.print("Debug Point - VisuaLVM");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenMap_whenEqualsAndHashCodeOverridden_thenNoMemoryLeak() {
Map<PersonOptimized, Integer> map = new HashMap<PersonOptimized, Integer>();
for(int i=0; i<10000; i++) {
map.put(new PersonOptimized("jon"), 1);
}
assertTrue(map.size() == 1);
System.out.print("Debug Point - VisuaLVM");
}
}

28
core-java/src/test/java/com/baeldung/memoryleaks/finalize/FinalizeMemoryLeakUnitTest.java Normal file
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package com.baeldung.memoryleaks.finalize;
import org.junit.Ignore;
import org.junit.Test;
public class FinalizeMemoryLeakUnitTest {
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenObjectWithFinalizer_whenCreatingAndDestroyingThisObject_thenMemoryLeak() {
BulkyObject[] stock = new BulkyObject[100000];
for(int i=0; i<100000; i++) {
stock[i] = new BulkyObject();
}
System.out.print("Debug Point - VisuaLVM");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenObjectWithoutFinalizer_whenCreatingAndDestroyingThisObject_thenNoMemoryLeak() {
BulkyObjectOptimized[] stock = new BulkyObjectOptimized[100000];
for(int i=0; i<100000; i++) {
stock[i] = new BulkyObjectOptimized();
}
System.out.print("Debug Point - VisuaLVM");
}
}

20
core-java/src/test/java/com/baeldung/memoryleaks/innerclass/StaticInnerClassMemoryLeakUnitTest.java Normal file
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package com.baeldung.memoryleaks.innerclass;
import org.junit.Ignore;
import org.junit.Test;
public class StaticInnerClassMemoryLeakUnitTest {
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenUsingInnerClass_whenInitializingInnerClass_thenInnerClassHoldsReferenceOfOuterObject() {
InnerClassWrapper.SimpleInnerClass simpleInnerClassObj = new InnerClassWrapper().new SimpleInnerClass();
System.out.print("Debug Point - VisuaLVM");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenUsingStaticNestedClass_whenInitializingInnerClass_thenStaticNestedClassDoesntReferenceOuterObject() {
StaticNestedClassWrapper.StaticNestedClass staticNestedClassObj = new StaticNestedClassWrapper.StaticNestedClass();
System.out.print("Debug Point - VisuaLVM");
}
}

20
core-java/src/test/java/com/baeldung/memoryleaks/internedstrings/StringInternMemoryLeakUnitTest.java Normal file
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@ -0,0 +1,20 @@
package com.baeldung.memoryleaks.internedstrings;
import org.junit.Ignore;
import org.junit.Test;
public class StringInternMemoryLeakUnitTest {
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenJava6OrBelow_whenInterningLargeStrings_thenPermgenIncreases() {
new InternedString().readString();
System.out.print("Debug Point - VisuaLVM");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenJava6OrBelow_whenNotInterningLargeStrings_thenPermgenDoesntIncrease() {
new StringObject().readString();
System.out.print("Debug Point - VisuaLVM");
}
}

26
core-java/src/test/java/com/baeldung/memoryleaks/staticfields/NonStaticFieldsMemoryLeakUnitTest.java Normal file
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@ -0,0 +1,26 @@
package com.baeldung.memoryleaks.staticfields;
import java.util.ArrayList;
import java.util.List;
import org.junit.Ignore;
import org.junit.Test;
public class NonStaticFieldsMemoryLeakUnitTest {
public List<Double> list = new ArrayList<>();
public void populateList() {
for (int i = 0; i < 10000000; i++) {
list.add(Math.random());
}
System.out.println("Debug Point 2");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenNonStaticLargeList_whenPopulatingList_thenListGarbageCollected() {
System.out.println("Debug Point 1");
new NonStaticFieldsMemoryLeakUnitTest().populateList();
System.out.println("Debug Point 3");
}
}

26
core-java/src/test/java/com/baeldung/memoryleaks/staticfields/StaticFieldsMemoryLeakUnitTest.java Normal file
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package com.baeldung.memoryleaks.staticfields;
import java.util.ArrayList;
import java.util.List;
import org.junit.Ignore;
import org.junit.Test;
public class StaticFieldsMemoryLeakUnitTest {
public static List<Double> list = new ArrayList<>();
public void populateList() {
for (int i = 0; i < 10000000; i++) {
list.add(Math.random());
}
System.out.println("Debug Point 2");
}
@Test
@Ignore // Test deliberately ignored as memory leak tests consume lots of resources
public void givenStaticLargeList_whenPopulatingList_thenListIsNotGarbageCollected() {
System.out.println("Debug Point 1");
new StaticFieldsDemo().populateList();
System.out.println("Debug Point 3");
}
}

21
core-java/src/test/java/com/baeldung/nth/root/calculator/NthRootCalculatorUnitTest.java Normal file
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@ -0,0 +1,21 @@
package com.baeldung.nth.root.calculator;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.runners.MockitoJUnitRunner;
import static org.junit.Assert.assertEquals;
@RunWith(MockitoJUnitRunner.class)
public class NthRootCalculatorUnitTest {
@InjectMocks
private NthRootCalculator nthRootCalculator;
@Test
public void giventThatTheBaseIs125_andTheExpIs3_whenCalculateIsCalled_thenTheResultIsTheCorrectOne() {
Double result = nthRootCalculator.calculate(125.0, 3.0);
assertEquals(result, (Double) 5.0d);
}
}

34
core-java/src/test/java/com/baeldung/nth/root/main/MainUnitTest.java Normal file
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package com.baeldung.nth.root.main;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InjectMocks;
import static org.junit.Assert.assertEquals;
public class MainUnitTest {
@InjectMocks
private Main main;
private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
private final PrintStream originalOut = System.out;
@Before
public void setUpStreams() {
System.setOut(new PrintStream(outContent));
}
@After
public void restoreStreams() {
System.setOut(originalOut);
}
@Test
public void givenThatTheBaseIs125_andTheExpIs3_whenMainIsCalled_thenTheCorrectResultIsPrinted() {
main.main(new String[]{"125.0", "3.0"});
assertEquals("The 3.0 root of 125.0 equals to 5.0.\n", outContent.toString().replaceAll("\r", ""));
}
}

121
core-kotlin/src/test/kotlin/com/baeldung/kotlin/StructuralJumpUnitTest.kt Normal file
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package com.baeldung.kotlin
import org.junit.Test
import kotlin.test.assertEquals
import kotlin.test.assertFalse
class StructuralJumpUnitTest {
@Test
fun givenLoop_whenBreak_thenComplete() {
var value = ""
for (i in "hello_world") {
if (i == '_')
break
value += i.toString()
}
assertEquals("hello", value)
}
@Test
fun givenLoop_whenBreakWithLabel_thenComplete() {
var value = ""
outer_loop@ for (i in 'a'..'d') {
for (j in 1..3) {
value += "" + i + j
if (i == 'b' && j == 1)
break@outer_loop
}
}
assertEquals("a1a2a3b1", value)
}
@Test
fun givenLoop_whenContinue_thenComplete() {
var result = ""
for (i in "hello_world") {
if (i == '_')
continue
result += i
}
assertEquals("helloworld", result)
}
@Test
fun givenLoop_whenContinueWithLabel_thenComplete() {
var result = ""
outer_loop@ for (i in 'a'..'c') {
for (j in 1..3) {
if (i == 'b')
continue@outer_loop
result += "" + i + j
}
}
assertEquals("a1a2a3c1c2c3", result)
}
@Test
fun givenLambda_whenReturn_thenComplete() {
var result = returnInLambda();
assertEquals("hello", result)
}
private fun returnInLambda(): String {
var result = ""
"hello_world".forEach {
// non-local return directly to the caller
if (it == '_') return result
result += it.toString()
}
//this line won't be reached
return result;
}
@Test
fun givenLambda_whenReturnWithExplicitLabel_thenComplete() {
var result = ""
"hello_world".forEach lit@{
if (it == '_') {
// local return to the caller of the lambda, i.e. the forEach loop
return@lit
}
result += it.toString()
}
assertEquals("helloworld", result)
}
@Test
fun givenLambda_whenReturnWithImplicitLabel_thenComplete() {
var result = ""
"hello_world".forEach {
if (it == '_') {
// local return to the caller of the lambda, i.e. the forEach loop
return@forEach
}
result += it.toString()
}
assertEquals("helloworld", result)
}
@Test
fun givenAnonymousFunction_return_thenComplete() {
var result = ""
"hello_world".forEach(fun(element) {
// local return to the caller of the anonymous fun, i.e. the forEach loop
if (element == '_') return
result += element.toString()
})
assertEquals("helloworld", result)
}
@Test
fun givenAnonymousFunction_returnToLabel_thenComplete() {
var result = ""
run loop@{
"hello_world".forEach {
// non-local return from the lambda passed to run
if (it == '_') return@loop
result += it.toString()
}
}
assertEquals("hello", result)
}
}

51
flyway-cdi-extension/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>flyway-cdi-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
<dependency>
<groupId>org.jboss.weld.se</groupId>
<artifactId>weld-se-core</artifactId>
<version>3.0.5.Final</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>5.1.4</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>8.5.33</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
<scope>runtime</scope>
</dependency>
</dependencies>
</project>

74
flyway-cdi-extension/src/main/java/com/baeldung/cdi/extension/FlywayExtension.java Normal file
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package com.baeldung.cdi.extension;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.flywaydb.core.Flyway;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.literal.InjectLiteral;
import javax.enterprise.inject.spi.*;
import javax.enterprise.util.AnnotationLiteral;
/**
* Flyway is now under CDI container like:
*
* @ApplicationScoped
* @FlywayType public class Flyway{
* @Inject setDataSource(DataSource dataSource){
* //...
* }
* }
*/
public class FlywayExtension implements Extension {
DataSourceDefinition dataSourceDefinition = null;
public void registerFlywayType(@Observes BeforeBeanDiscovery bbdEvent) {
bbdEvent.addAnnotatedType(Flyway.class, Flyway.class.getName());
}
public void detectDataSourceDefinition(@Observes @WithAnnotations(DataSourceDefinition.class) ProcessAnnotatedType<?> patEvent) {
AnnotatedType at = patEvent.getAnnotatedType();
dataSourceDefinition = at.getAnnotation(DataSourceDefinition.class);
}
public void processAnnotatedType(@Observes ProcessAnnotatedType<Flyway> patEvent) {
patEvent.configureAnnotatedType()
//Add Scope
.add(ApplicationScoped.Literal.INSTANCE)
//Add Qualifier
.add(new AnnotationLiteral<FlywayType>() {
})
//Decorate setDataSource(DataSource dataSource){} with @Inject
.filterMethods(annotatedMethod -> {
return annotatedMethod.getParameters().size() == 1 &&
annotatedMethod.getParameters().get(0).getBaseType().equals(javax.sql.DataSource.class);
})
.findFirst().get().add(InjectLiteral.INSTANCE);
}
void afterBeanDiscovery(@Observes AfterBeanDiscovery abdEvent, BeanManager bm) {
abdEvent.addBean()
.types(javax.sql.DataSource.class, DataSource.class)
.qualifiers(new AnnotationLiteral<Default>() {}, new AnnotationLiteral<Any>() {})
.scope(ApplicationScoped.class)
.name(DataSource.class.getName())
.beanClass(DataSource.class)
.createWith(creationalContext -> {
DataSource instance = new DataSource();
instance.setUrl(dataSourceDefinition.url());
instance.setDriverClassName(dataSourceDefinition.className());
return instance;
});
}
void runFlywayMigration(@Observes AfterDeploymentValidation adv, BeanManager manager) {
Flyway flyway = manager.createInstance().select(Flyway.class, new AnnotationLiteral<FlywayType>() {}).get();
flyway.migrate();
}
}

14
flyway-cdi-extension/src/main/java/com/baeldung/cdi/extension/FlywayType.java Normal file
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@ -0,0 +1,14 @@
package com.baeldung.cdi.extension;
import javax.inject.Qualifier;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
@Retention(RetentionPolicy.RUNTIME)
@Target({FIELD, METHOD, PARAMETER, TYPE})
@Qualifier
public @interface FlywayType {
}

16
flyway-cdi-extension/src/main/java/com/baeldung/cdi/extension/MainApp.java Normal file
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@ -0,0 +1,16 @@
package com.baeldung.cdi.extension;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.se.SeContainer;
import javax.enterprise.inject.se.SeContainerInitializer;
@ApplicationScoped
@DataSourceDefinition(name = "ds", className = "org.h2.Driver", url = "jdbc:h2:mem:testdb")
public class MainApp {
public static void main(String[] args) {
SeContainerInitializer initializer = SeContainerInitializer.newInstance();
try (SeContainer container = initializer.initialize()) {
}
}
}

6
flyway-cdi-extension/src/main/resources/META-INF/beans.xml Normal file
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@ -0,0 +1,6 @@
<beans version="2.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
bean-discovery-mode="annotated">
</beans>

2
flyway-cdi-extension/src/main/resources/META-INF/services/javax.enterprise.inject.spi.Extension Normal file
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@ -0,0 +1,2 @@
com.baeldung.cdi.extension.FlywayExtension

4
flyway-cdi-extension/src/main/resources/db/migration/V1__Create_person_table.sql Normal file
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@ -0,0 +1,4 @@
create table PERSON (
ID int not null,
NAME varchar(100) not null
);

3
flyway-cdi-extension/src/main/resources/db/migration/V2__Add_people.sql Normal file
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@ -0,0 +1,3 @@
insert into PERSON (ID, NAME) values (1, 'Axel');
insert into PERSON (ID, NAME) values (2, 'Mr. Foo');
insert into PERSON (ID, NAME) values (3, 'Ms. Bar');

130
gson/pom.xml
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@ -1,73 +1,73 @@
<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>gson</artifactId>
<version>0.1-SNAPSHOT</version>
<name>gson</name>
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>gson</artifactId>
<version>0.1-SNAPSHOT</version>
<name>gson</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-java</relativePath>
</parent>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-java</relativePath>
</parent>
<dependencies>
<!-- utils -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<!-- marshalling -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
</dependencies>
<dependencies>
<!-- utils -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${commons-collections4.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<!-- marshalling -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
</dependencies>
<build>
<finalName>gson</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
<build>
<finalName>gson</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
<properties>
<!-- marshalling -->
<gson.version>2.8.0</gson.version>
<!-- util -->
<commons-lang3.version>3.5</commons-lang3.version>
<commons-collections4.version>4.1</commons-collections4.version>
<joda-time.version>2.9.6</joda-time.version>
<properties>
<!-- marshalling -->
<gson.version>2.8.0</gson.version>
<!-- util -->
<commons-lang3.version>3.5</commons-lang3.version>
<commons-collections4.version>4.1</commons-collections4.version>
<joda-time.version>2.9.6</joda-time.version>
<lombok.version>1.16.10</lombok.version>
</properties>
</properties>
</project>

36
gson/src/main/java/org/baeldung/gson/entities/Employee.java Normal file
View File

@ -0,0 +1,36 @@
package org.baeldung.gson.entities;
public class Employee {
private int id;
private String name;
private String address;
public Employee(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}

66
gson/src/main/java/org/baeldung/gson/serialization/HashMapDeserializer.java Normal file
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@ -0,0 +1,66 @@
package org.baeldung.gson.serialization;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.util.HashMap;
import java.util.Map;
import org.baeldung.gson.entities.Employee;
import com.google.gson.*;
public class HashMapDeserializer implements JsonDeserializer<HashMap<String, Object>> {
@Override
public HashMap<String, Object> deserialize(JsonElement elem, Type type, JsonDeserializationContext context) throws JsonParseException {
HashMap<String, Object> map = new HashMap<>();
for (Map.Entry<String, JsonElement> entry : elem.getAsJsonObject().entrySet()) {
JsonElement jsonValue = entry.getValue();
Object value = null;
if (jsonValue.isJsonPrimitive()) {
value = toPrimitive(jsonValue.getAsJsonPrimitive(), context);
} else {
value = context.deserialize(jsonValue, Employee.class);
}
map.put(entry.getKey(), value);
}
return map;
}
private Object toPrimitive(JsonPrimitive jsonValue, JsonDeserializationContext context) {
if (jsonValue.isBoolean())
return jsonValue.getAsBoolean();
else if (jsonValue.isString())
return jsonValue.getAsString();
else {
BigDecimal bigDec = jsonValue.getAsBigDecimal();
Long l;
Integer i;
if ((i = toInteger(bigDec)) != null) {
return i;
} else if ((l = toLong(bigDec)) != null) {
return l;
} else {
return bigDec.doubleValue();
}
}
}
private Long toLong(BigDecimal val) {
try {
return val.toBigIntegerExact().longValue();
} catch (ArithmeticException e) {
return null;
}
}
private Integer toInteger(BigDecimal val) {
try {
return val.intValueExact();
} catch (ArithmeticException e) {
return null;
}
}
}

8
gson/src/main/resources/logback.xml
View File

@ -7,13 +7,13 @@
</encoder>
</appender>
<logger name="org.springframework" level="WARN" />
<logger name="org.springframework.transaction" level="WARN" />
<logger name="org.springframework" level="WARN"/>
<logger name="org.springframework.transaction" level="WARN"/>
<!-- in order to debug some marshalling issues, this needs to be TRACE -->
<logger name="org.springframework.web.servlet.mvc" level="WARN" />
<logger name="org.springframework.web.servlet.mvc" level="WARN"/>
<root level="INFO">
<appender-ref ref="STDOUT" />
<appender-ref ref="STDOUT"/>
</root>
</configuration>

86
gson/src/test/java/org/baeldung/gson/deserialization/HashMapDeserializationUnitTest.java Normal file
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@ -0,0 +1,86 @@
package org.baeldung.gson.deserialization;
import java.lang.reflect.Type;
import java.util.HashMap;
import org.baeldung.gson.entities.Employee;
import org.baeldung.gson.serialization.HashMapDeserializer;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonSyntaxException;
import com.google.gson.internal.LinkedTreeMap;
import com.google.gson.reflect.TypeToken;
public class HashMapDeserializationUnitTest {
private static final Logger logger = LoggerFactory.getLogger(HashMapDeserializationUnitTest.class);
@Test
public void whenUsingHashMapClass_thenShouldReturnMapWithDefaultClasses() {
String jsonString = "{'employee.name':'Bob','employee.salary':10000, 'employee.active':true, "
+ "'employee':{'id':10, 'name': 'Bob Willis', 'address':'London'}}";
Gson gson = new Gson();
HashMap map = gson.fromJson(jsonString, HashMap.class);
logger.info("The converted map: {}", map);
Assert.assertEquals(4, map.size());
Assert.assertEquals(Double.class, map.get("employee.salary").getClass());
Assert.assertEquals(LinkedTreeMap.class, map.get("employee").getClass());
}
@Test(expected = JsonSyntaxException.class)
public void whenUsingJsonStringWithDuplicateKey_thenShouldThrowJsonSyntaxException() {
String jsonString = "{'employee.name':'Bob', 'employee.name':'Jenny','employee.salary':10000, "
+ "'employee.active':true, " + "'employee':{'id':10, 'name': 'Bob Willis', 'address':'London'}}";
Gson gson = new Gson();
HashMap map = gson.fromJson(jsonString, HashMap.class);
logger.info("The converted map: {}", map);
}
@Test
public void whenUsingTypeToken_thenShouldReturnMapWithProperClass() {
String jsonString = "{'Bob':{'id':10, 'name': 'Bob Willis', 'address':'UK'},"
+ "'Jenny':{'id':10, 'name': 'Jenny McCarthy', 'address':'USA'}, "
+ "'Steve':{'id':10, 'name': 'Steven Waugh', 'address':'Australia'}}";
Gson gson = new Gson();
Type empMapType = new TypeToken<HashMap<String, Employee>>(){}.getType();
HashMap<String, Employee> nameEmployeeMap = gson.fromJson(jsonString, empMapType);
logger.info("The converted map: {}", nameEmployeeMap);
Assert.assertEquals(3, nameEmployeeMap.size());
Assert.assertEquals(Employee.class, nameEmployeeMap.get("Bob").getClass());
}
@Test
public void whenUsingCustomDeserializer_thenShouldReturnMapWithProperClass() {
String jsonString = "{'employee.name':'Bob','employee.salary':10000, 'employee.active':true, "
+ "'employee':{'id':10, 'name': 'Bob Willis', 'address':'London'}}";
Type type = new TypeToken<HashMap<String, Object>>(){}.getType();
Gson gson = new GsonBuilder()
.registerTypeAdapter(type, new HashMapDeserializer())
.create();
HashMap<String, Object> blendedMap = gson.fromJson(jsonString, type);
logger.info("The converted map: {}", blendedMap);
Assert.assertEquals(4, blendedMap.size());
Assert.assertEquals(Integer.class, blendedMap.get("employee.salary").getClass());
Assert.assertEquals(Employee.class, blendedMap.get("employee").getClass());
}
}

19
gson/src/test/resources/logback-test.xml Normal file
View File

@ -0,0 +1,19 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<logger name="org.springframework" level="WARN"/>
<logger name="org.springframework.transaction" level="WARN"/>
<!-- in order to debug some marshalling issues, this needs to be TRACE -->
<logger name="org.springframework.web.servlet.mvc" level="WARN"/>
<root level="INFO">
<appender-ref ref="STDOUT"/>
</root>
</configuration>

47
hibernate5/src/main/java/com/baeldung/hibernate/namingstrategy/CustomPhysicalNamingStrategy.java Normal file
View File

@ -0,0 +1,47 @@
package com.baeldung.hibernate.namingstrategy;
import org.hibernate.boot.model.naming.Identifier;
import org.hibernate.boot.model.naming.PhysicalNamingStrategy;
import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
public class CustomPhysicalNamingStrategy implements PhysicalNamingStrategy {
@Override
public Identifier toPhysicalCatalogName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return convertToSnakeCase(identifier);
}
@Override
public Identifier toPhysicalColumnName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return convertToSnakeCase(identifier);
}
@Override
public Identifier toPhysicalSchemaName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return convertToSnakeCase(identifier);
}
@Override
public Identifier toPhysicalSequenceName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return convertToSnakeCase(identifier);
}
@Override
public Identifier toPhysicalTableName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return convertToSnakeCase(identifier);
}
private Identifier convertToSnakeCase(final Identifier identifier) {
if (identifier == null) {
return identifier;
}
final String regex = "([a-z])([A-Z])";
final String replacement = "$1_$2";
final String newName = identifier.getText()
.replaceAll(regex, replacement)
.toLowerCase();
return Identifier.toIdentifier(newName);
}
}

56
hibernate5/src/main/java/com/baeldung/hibernate/namingstrategy/Customer.java Normal file
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@ -0,0 +1,56 @@
package com.baeldung.hibernate.namingstrategy;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "Customers")
public class Customer {
@Id
@GeneratedValue
private Long id;
private String firstName;
private String lastName;
@Column(name = "email")
private String emailAddress;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmailAddress() {
return emailAddress;
}
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
}
}

56
hibernate5/src/main/java/com/baeldung/hibernate/proxy/BatchEmployee.java
View File

@ -1,56 +0,0 @@
package com.baeldung.hibernate.proxy;
import org.hibernate.annotations.BatchSize;
import javax.persistence.*;
import java.io.Serializable;
@Entity
@BatchSize(size = 5)
public class BatchEmployee implements Serializable {
@Id
@GeneratedValue (strategy = GenerationType.SEQUENCE)
private Long id;
@ManyToOne(fetch = FetchType.LAZY)
private Boss boss;
@Column(name = "name")
private String name;
@Column(name = "surname")
private String surname;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Boss getBoss() {
return boss;
}
public void setBoss(Boss boss) {
this.boss = boss;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
}

49
hibernate5/src/main/java/com/baeldung/hibernate/proxy/Boss.java
View File

@ -1,49 +0,0 @@
package com.baeldung.hibernate.proxy;
import javax.persistence.*;
import java.io.Serializable;
@Entity
public class Boss implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
@Column(name = "name")
private String name;
@Column(name = "surname")
private String surname;
public Boss() { }
public Boss(String name, String surname) {
this.name = name;
this.surname = surname;
}
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 String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
}

62
hibernate5/src/main/java/com/baeldung/hibernate/proxy/Company.java Normal file
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@ -0,0 +1,62 @@
package com.baeldung.hibernate.proxy;
import javax.persistence.*;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
@Entity
public class Company implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
private Long id;
@Column(name = "name")
private String name;
@OneToMany
@JoinColumn(name = "workplace_id")
private Set<Employee> employees = new HashSet<>();
public Company() { }
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 Set<Employee> getEmployees() {
return this.employees;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Company company = (Company) o;
return Objects.equals(id, company.id) &&
Objects.equals(name, company.name);
}
@Override
public int hashCode() {
return Objects.hash(id, name);
}
}

50
hibernate5/src/main/java/com/baeldung/hibernate/proxy/Employee.java
View File

@ -1,9 +1,13 @@
package com.baeldung.hibernate.proxy;
import org.hibernate.annotations.BatchSize;
import javax.persistence.*;
import java.io.Serializable;
import java.util.Objects;
@Entity
@BatchSize(size = 5)
public class Employee implements Serializable {
@Id
@ -11,13 +15,18 @@ public class Employee implements Serializable {
private Long id;
@ManyToOne(fetch = FetchType.LAZY)
private Boss boss;
@JoinColumn(name = "workplace_id")
private Company workplace;
@Column(name = "name")
private String name;
@Column(name = "first_name")
private String firstName;
@Column(name = "surname")
private String surname;
public Employee() { }
public Employee(Company workplace, String firstName) {
this.workplace = workplace;
this.firstName = firstName;
}
public Long getId() {
return id;
@ -27,27 +36,34 @@ public class Employee implements Serializable {
this.id = id;
}
public Boss getBoss() {
return boss;
public Company getWorkplace() {
return workplace;
}
public void setBoss(Boss boss) {
this.boss = boss;
public void setWorkplace(Company workplace) {
this.workplace = workplace;
}
public String getName() {
return name;
public String getFirstName() {
return firstName;
}
public void setName(String name) {
this.name = name;
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getSurname() {
return surname;
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Employee employee = (Employee) o;
return Objects.equals(id, employee.id) &&
Objects.equals(workplace, employee.workplace) &&
Objects.equals(firstName, employee.firstName);
}
public void setSurname(String surname) {
this.surname = surname;
@Override
public int hashCode() {
return Objects.hash(id, workplace, firstName);
}
}

2
hibernate5/src/main/java/com/baeldung/hibernate/proxy/HibernateUtil.java
View File

@ -30,7 +30,7 @@ public class HibernateUtil {
private static SessionFactoryBuilder getSessionFactoryBuilder(ServiceRegistry serviceRegistry) {
MetadataSources metadataSources = new MetadataSources(serviceRegistry);
metadataSources.addPackage("com.baeldung.hibernate.proxy");
metadataSources.addAnnotatedClass(Boss.class);
metadataSources.addAnnotatedClass(Company.class);
metadataSources.addAnnotatedClass(Employee.class);
Metadata metadata = metadataSources.buildMetadata();

75
hibernate5/src/test/java/com/baeldung/hibernate/namingstrategy/NamingStrategyLiveTest.java Normal file
View File

@ -0,0 +1,75 @@
package com.baeldung.hibernate.namingstrategy;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.util.Properties;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class NamingStrategyLiveTest {
private Session session;
@Before
public void init() {
try {
Configuration configuration = new Configuration();
Properties properties = new Properties();
properties.load(Thread.currentThread()
.getContextClassLoader()
.getResourceAsStream("hibernate-namingstrategy.properties"));
configuration.setProperties(properties);
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties())
.build();
MetadataSources metadataSources = new MetadataSources(serviceRegistry);
metadataSources.addAnnotatedClass(Customer.class);
SessionFactory factory = metadataSources.buildMetadata()
.buildSessionFactory();
session = factory.openSession();
} catch (HibernateException | IOException e) {
fail("Failed to initiate Hibernate Session [Exception:" + e.toString() + "]");
}
}
@After
public void close() {
if (session != null)
session.close();
}
@Test
public void testCustomPhysicalNamingStrategy() {
Customer customer = new Customer();
customer.setFirstName("first name");
customer.setLastName("last name");
customer.setEmailAddress("customer@example.com");
session.beginTransaction();
Long id = (Long) session.save(customer);
session.flush();
session.clear();
Object[] result = (Object[]) session.createNativeQuery("select c.first_name, c.last_name, c.email from customers c where c.id = :id")
.setParameter("id", id)
.getSingleResult();
}
}

133
hibernate5/src/test/java/com/baeldung/hibernate/proxy/HibernateProxyUnitTest.java
View File

@ -1,6 +1,7 @@
package com.baeldung.hibernate.proxy;
import org.hibernate.*;
import org.hibernate.proxy.HibernateProxy;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
@ -8,25 +9,31 @@ import org.junit.Test;
import static org.junit.Assert.*;
import java.io.IOException;
import java.util.List;
import static org.junit.Assert.fail;
public class HibernateProxyUnitTest {
private SessionFactory factory;
private Session session;
private Company workplace;
private Employee albert;
private Employee bob;
private Employee charlotte;
@Before
public void init(){
try {
session = HibernateUtil.getSessionFactory("hibernate.properties")
.openSession();
factory = HibernateUtil.getSessionFactory("hibernate.properties");
session = factory.openSession();
} catch (HibernateException | IOException e) {
fail("Failed to initiate Hibernate Session [Exception:" + e.toString() + "]");
}
Boss boss = new Boss("Eduard", "Freud");
session.save(boss);
}
@After
@ -36,40 +43,114 @@ public class HibernateProxyUnitTest {
}
}
@Test(expected = NullPointerException.class)
@Test
public void givenAnInexistentEmployeeId_whenUseGetMethod_thenReturnNull() {
Employee employee = session.get(Employee.class, new Long(14));
Employee employee = session.get(Employee.class, 14L);
assertNull(employee);
employee.getId();
}
@Test
public void givenAnInexistentEmployeeId_whenUseLoadMethod_thenReturnAProxy() {
Employee employee = session.load(Employee.class, new Long(14));
@Test(expected = ObjectNotFoundException.class)
public void givenAnNonExistentEmployeeId_whenUseLoadMethod_thenThrowObjectNotFoundException() {
Employee employee = session.load(Employee.class, 999L);
assertNotNull(employee);
employee.getFirstName();
}
@Test
public void givenABatchEmployeeList_whenSaveOne_thenSaveTheWholeBatch() {
Transaction transaction = session.beginTransaction();
public void givenAnNonExistentEmployeeId_whenUseLoadMethod_thenReturnAProxy() {
Employee employee = session.load(Employee.class, 14L);
assertNotNull(employee);
assertTrue(employee instanceof HibernateProxy);
}
for (long i = 1; i <= 5; i++) {
Employee employee = new Employee();
employee.setName("Employee " + i);
session.save(employee);
}
@Test
public void givenAnEmployeeFromACompany_whenUseLoadMethod_thenCompanyIsAProxy() {
Transaction tx = session.beginTransaction();
this.workplace = new Company("Bizco");
session.save(workplace);
this.albert = new Employee(workplace, "Albert");
session.save(albert);
//After this line is possible to see all the insertions in the logs
session.flush();
session.clear();
transaction.commit();
transaction = session.beginTransaction();
tx.commit();
this.session = factory.openSession();
List<Employee> employeeList = session.createQuery("from Employee")
.setCacheMode(CacheMode.IGNORE).getResultList();
Employee proxyAlbert = session.load(Employee.class, albert.getId());
assertTrue(proxyAlbert instanceof HibernateProxy);
assertEquals(employeeList.size(), 5);
transaction.commit();
// with many-to-one lazy-loading, associations remain proxies
assertTrue(proxyAlbert.getWorkplace() instanceof HibernateProxy);
}
@Test
public void givenACompanyWithEmployees_whenUseLoadMethod_thenEmployeesAreProxies() {
Transaction tx = session.beginTransaction();
this.workplace = new Company("Bizco");
session.save(workplace);
this.albert = new Employee(workplace, "Albert");
session.save(albert);
session.flush();
session.clear();
tx.commit();
this.session = factory.openSession();
Company proxyBizco = session.load(Company.class, workplace.getId());
assertTrue(proxyBizco instanceof HibernateProxy);
// with one-to-many, associations aren't proxies
assertFalse(proxyBizco.getEmployees().iterator().next() instanceof HibernateProxy);
}
@Test
public void givenThreeEmployees_whenLoadThemWithBatch_thenReturnAllOfThemWithOneQuery() {
Transaction tx = session.beginTransaction();
//We are saving 3 entities with one flush
this.workplace = new Company("Bizco");
session.save(workplace);
this.albert = new Employee(workplace, "Albert");
session.save(albert);
this.bob = new Employee(workplace, "Bob");
session.save(bob);
this.charlotte = new Employee(workplace, "Charlotte");
session.save(charlotte);
session.flush();
session.clear();
tx.commit();
session = factory.openSession();
Employee proxyAlbert = session.load(Employee.class, this.albert.getId());
assertNotNull(proxyAlbert);
assertTrue(proxyAlbert instanceof HibernateProxy);
Employee proxyBob = session.load(Employee.class, this.bob.getId());
assertNotNull(proxyBob);
assertTrue(proxyBob instanceof HibernateProxy);
Employee proxyCharlotte = session.load(Employee.class, this.charlotte.getId());
assertNotNull(proxyCharlotte);
assertTrue(proxyCharlotte instanceof HibernateProxy);
//Fetching from database 3 entities with one call
//Select from log: where employee0_.id in (?, ?, ?)
proxyAlbert.getFirstName();
assertEquals(proxyAlbert, this.albert);
assertEquals(proxyBob, this.bob);
assertEquals(proxyCharlotte, this.charlotte);
}
}

10
hibernate5/src/test/resources/hibernate-namingstrategy.properties Normal file
View File

@ -0,0 +1,10 @@
hibernate.connection.driver_class=org.h2.Driver
hibernate.connection.url=jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1
hibernate.connection.username=sa
hibernate.dialect=org.hibernate.dialect.H2Dialect
hibernate.show_sql=true
hibernate.hbm2ddl.auto=create-drop
hibernate.physical_naming_strategy=com.baeldung.hibernate.namingstrategy.CustomPhysicalNamingStrategy
hibernate.implicit_naming_strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyJpaCompliantImpl

20
java-numbers/src/test/java/com/baeldung/maths/MathSinUnitTest.java Normal file
View File

@ -0,0 +1,20 @@
package com.baeldung.maths;
import static org.junit.Assert.assertTrue;
import org.junit.jupiter.api.Test;
public class MathSinUnitTest {
@Test
public void givenAnAngleInDegrees_whenUsingToRadians_thenResultIsInRadians() {
double angleInDegrees = 30;
double sinForDegrees = Math.sin(Math.toRadians(angleInDegrees)); // 0.5
double thirtyDegreesInRadians = 1/6 * Math.PI;
double sinForRadians = Math.sin(thirtyDegreesInRadians); // 0.5
assertTrue(sinForDegrees == sinForRadians);
}
}

1
jee-7/README.md
View File

@ -6,3 +6,4 @@
- [A Guide to Java EE Web-Related Annotations](http://www.baeldung.com/javaee-web-annotations)
- [Introduction to Testing with Arquillian](http://www.baeldung.com/arquillian)
- [Securing Java EE with Spring Security](http://www.baeldung.com/java-ee-spring-security)
- [A Guide to Java EE Web-Related Annotations](https://www.baeldung.com/javaee-web-annotations)

2
jee-7/pom.xml
View File

@ -130,7 +130,7 @@
<artifactId>maven-war-plugin</artifactId>
<version>${maven-war-plugin.version}</version>
<configuration>
<warSourceDirectory>webapp</warSourceDirectory>
<warSourceDirectory>src/main/webapp</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>

2
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/java/com/baeldung/javaeeannotations/AccountServlet.java → jee-7/src/main/java/com/baeldung/javaeeannotations/AccountServlet.java
View File

@ -1,4 +1,4 @@
package com.baeldung.javaeeannotations.JavaEEAnnotationsSample.src.main.java.com.baeldung.javaeeannotations;
package com.baeldung.javaeeannotations;
import java.io.IOException;
import java.io.PrintWriter;

2
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/java/com/baeldung/javaeeannotations/BankAppServletContextListener.java → jee-7/src/main/java/com/baeldung/javaeeannotations/BankAppServletContextListener.java
View File

@ -1,4 +1,4 @@
package com.baeldung.javaeeannotations.JavaEEAnnotationsSample.src.main.java.com.baeldung.javaeeannotations;
package com.baeldung.javaeeannotations;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

76
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/README.txt
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@ -1,76 +0,0 @@
About the application
---------------------
This application demonstrates the usage of JavaEE Web Annotations.
Contents of the application
---------------------------
1. AccountServlet.java - Demonstrates the @WebServlet and @ServletSecurity annotation.
NOTES: @WebServlet annotation designates the AccountServlet class as a Servlet component.
The usage of its parameters 'urlPatterns' & 'initParams' can be observed.
An initialization parameter 'type' is being set to denote the type of the bank account.
@ServletSecurity annotation imposes security constraints on the AccountServlet based on
the tomcat-users.xml.
 
This code assumes that your tomcat-users.xml looks as follows:
<role rolename="Admin"/>
<role rolename="Member"/>
<role rolename="Guest"/>
<user username="Annie" password="admin" roles="Admin, Member, Guest" />
<user username="Diane" password="coder" roles="Member, Guest" />
<user username="Ted" password="newbie" roles="Guest" />
 
N.B : To see @ServletSecurity annotation in action, please uncomment the annotation code
for @ServletSecurity.
2. BankAppServletContextListener.java - Demonstrates the @WebListener annotation for denoting a class as a ServletContextListener.
NOTES: Sets a Servlet context attribute ATTR_DEFAULT_LANGUAGE to 'english' on web application start up,
which can then be used throughout the application.
3. LogInFilter.java - Demonstrates the @WebFilter annotation.
NOTES: @WebFilter annotation designates the LogInFilter class as a Filter component.
It filters all requests to the bank account servlet and redirects them to
the login page.
N.B : To see @WebFilter annotation in action, please uncomment the annotation code for @WebFilter.
4. UploadCustomerDocumentsServlet.java - Demonstrates the @MultipartConfig annotation.
NOTES: @MultipartConfig anotation designates the UploadCustomerDocumentsServlet Servlet component,
to handle multipart/form-data requests.
To see it in action, deploy the web application an access the url: http://<your host>:<your port>/JavaEEAnnotationsSample/upload.jsp
Once you upload a file from here, it will get uploaded to D:/custDocs (assuming such a folder exists).
5. index.jsp - This is the welcome page.
NOTES: You can enter a deposit amount here and click on the 'Deposit' button to see the AccountServlet in action.
6. login.jsp - All requests to the AccountServlet are redirected to this page, if the LogInFilter is imposed.
7. upload.jsp - Demonstrates the usage of handling multipart/form-data requests by the UploadCustomerDocumentsServlet.
Building and Running the application
------------------------------------
To build the application:
1. Open the project in eclipse
2. Right click on it in eclispe and choose Run As > Maven build
3. Give 'clean install' under Goals
4. This should build the WAR file of the application
To run the application:
1. Right click on the project
2. Run as > Run on Server
3. This will start you Tomcat server and deploy the application (Provided that you have configured Tomcat in your eclipse)
4. You should now be able to access the url : http://<your host>:<your port>/JavaEEAnnotationsSample

52
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/pom.xml
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@ -1,52 +0,0 @@
<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.javaeeannotations</groupId>
<artifactId>JavaEEAnnotationsSample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>JavaEEAnnotationsSample</name>
<description>JavaEEAnnotationsSample</description>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>src/main/webapp</warSourceDirectory>
<warName>SpringFieldConstructorInjection</warName>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</pluginManagement>
<finalName>JavaEEAnnotationsSample</finalName>
</build>
</project>

10
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/webapp/WEB-INF/web.xml
View File

@ -1,10 +0,0 @@
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<login-config>
<auth-method>BASIC</auth-method>
<realm-name>default</realm-name>
</login-config>
</web-app>

12
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/webapp/login.jsp
View File

@ -1,12 +0,0 @@
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login</title>
</head>
<body>
Login Here...
</body>
</html>

2
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/java/com/baeldung/javaeeannotations/LogInFilter.java → jee-7/src/main/java/com/baeldung/javaeeannotations/LogInFilter.java
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@ -1,4 +1,4 @@
package com.baeldung.javaeeannotations.JavaEEAnnotationsSample.src.main.java.com.baeldung.javaeeannotations;
package com.baeldung.javaeeannotations;
import java.io.IOException;

2
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/java/com/baeldung/javaeeannotations/UploadCustomerDocumentsServlet.java → jee-7/src/main/java/com/baeldung/javaeeannotations/UploadCustomerDocumentsServlet.java
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@ -1,4 +1,4 @@
package com.baeldung.javaeeannotations.JavaEEAnnotationsSample.src.main.java.com.baeldung.javaeeannotations;
package com.baeldung.javaeeannotations;
import java.io.IOException;
import java.io.PrintWriter;

0
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/webapp/index.jsp → jee-7/src/main/webapp/account.jsp
View File

0
jee-7/src/main/java/com/baeldung/javaeeannotations/JavaEEAnnotationsSample/src/main/webapp/upload.jsp → jee-7/src/main/webapp/upload.jsp
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3
maven-polyglot/README.md Normal file
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@ -0,0 +1,3 @@
To run the maven-polyglot-json-app successfully, you first have to build the maven-polyglot-json-extension module using: mvn clean install.
Related Articles:

8
maven-polyglot/maven-polyglot-json-app/.mvn/extensions.xml Normal file
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@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<extensions>
<extension>
<groupId>com.baeldung.maven.polyglot</groupId>
<artifactId>maven-polyglot-json-extension</artifactId>
<version>1.0-SNAPSHOT</version>
</extension>
</extensions>

34
maven-polyglot/maven-polyglot-json-app/pom.json Normal file
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@ -0,0 +1,34 @@
{
"modelVersion": "4.0.0",
"groupId": "com.baeldung.maven.polyglot",
"artifactId": "maven-polyglot-json-app",
"version": "1.0-SNAPSHOT",
"name": "Json Maven Polyglot",
"parent": {
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-parent",
"version": "2.0.5.RELEASE",
"relativePath": null
},
"properties": {
"project.build.sourceEncoding": "UTF-8",
"project.reporting.outputEncoding": "UTF-8",
"maven.compiler.source": "1.8",
"maven.compiler.target": "1.8",
"java.version": "1.8"
},
"dependencies": [
{
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-web"
}
],
"build": {
"plugins": [
{
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-maven-plugin"
}
]
}
}

19
maven-polyglot/maven-polyglot-json-app/src/main/java/com/baeldung/maven/polyglot/MavenPolyglotApplication.java Normal file
View File

@ -0,0 +1,19 @@
package com.baeldung.maven.polyglot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.GetMapping;
@RestController
@SpringBootApplication
public class MavenPolyglotApplication {
public static void main(String[] args) {
SpringApplication.run(MavenPolyglotApplication.class, args);
}
@GetMapping("/")
public String home(){
return "Hello JSON Maven Model !";
}
}

109
maven-polyglot/maven-polyglot-json-app/src/main/resources/model.json Normal file
View File

@ -0,0 +1,109 @@
{
"modules": [],
"distributionManagement": null,
"properties": {
"project.reporting.outputEncoding": "UTF-8",
"java.version": "1.8",
"maven.compiler.source": "1.8",
"project.build.sourceEncoding": "UTF-8",
"maven.compiler.target": "1.8"
},
"dependencyManagement": null,
"dependencies": [
{
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-web",
"version": null,
"type": "jar",
"classifier": null,
"scope": null,
"systemPath": null,
"exclusions": [],
"optional": null,
"managementKey": "org.springframework.boot:spring-boot-starter-web:jar"
}
],
"repositories": [],
"pluginRepositories": [],
"reports": null,
"reporting": null,
"modelVersion": "4.0.0",
"parent": {
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-parent",
"version": "2.0.5.RELEASE",
"relativePath": "",
"id": "org.springframework.boot:spring-boot-starter-parent:pom:2.0.5.RELEASE"
},
"groupId": "com.demo.polyglot",
"artifactId": "maven-polyglot-app",
"version": "1.0.1",
"packaging": "jar",
"name": "Json Maven Polyglot",
"description": null,
"url": null,
"inceptionYear": null,
"organization": null,
"licenses": [],
"developers": [],
"contributors": [],
"mailingLists": [],
"prerequisites": null,
"scm": null,
"issueManagement": null,
"ciManagement": null,
"build": {
"plugins": [
{
"inherited": null,
"configuration": null,
"inheritanceApplied": true,
"groupId": "org.liquibase",
"artifactId": "liquibase-maven-plugin",
"version": "3.0.5",
"extensions": null,
"executions": [],
"dependencies": [],
"goals": null,
"key": "org.liquibase:liquibase-maven-plugin",
"id": "org.liquibase:liquibase-maven-plugin:3.0.5",
"executionsAsMap": {}
}
],
"pluginManagement": null,
"defaultGoal": null,
"resources": [],
"testResources": [],
"directory": null,
"finalName": null,
"filters": [],
"sourceDirectory": null,
"scriptSourceDirectory": null,
"testSourceDirectory": null,
"outputDirectory": null,
"testOutputDirectory": null,
"extensions": [],
"pluginsAsMap": {
"org.liquibase:liquibase-maven-plugin": {
"inherited": null,
"configuration": null,
"inheritanceApplied": true,
"groupId": "org.liquibase",
"artifactId": "liquibase-maven-plugin",
"version": "3.0.5",
"extensions": null,
"executions": [],
"dependencies": [],
"goals": null,
"key": "org.liquibase:liquibase-maven-plugin",
"id": "org.liquibase:liquibase-maven-plugin:3.0.5",
"executionsAsMap": {}
}
}
},
"profiles": [],
"modelEncoding": "UTF-8",
"pomFile": null,
"id": "com.demo.polyglot:maven-polyglot-app:jar:1.0.1",
"projectDirectory": null
}

47
maven-polyglot/maven-polyglot-json-extension/pom.xml Normal file
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@ -0,0 +1,47 @@
<?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.maven.polyglot</groupId>
<artifactId>maven-polyglot-json-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-core</artifactId>
<version>3.5.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-component-metadata</artifactId>
<version>1.7.1</version>
<executions>
<execution>
<goals>
<goal>generate-metadata</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

62
maven-polyglot/maven-polyglot-json-extension/src/main/java/com/demo/polyglot/CustomModelProcessor.java Normal file
View File

@ -0,0 +1,62 @@
package com.demo.polyglot;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.maven.model.Model;
import org.apache.maven.model.building.FileModelSource;
import org.apache.maven.model.building.ModelProcessor;
import org.apache.maven.model.io.ModelParseException;
import org.apache.maven.model.io.ModelReader;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Requirement;
import org.codehaus.plexus.util.ReaderFactory;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Map;
@Component(role = ModelProcessor.class)
public class CustomModelProcessor implements ModelProcessor {
private static final String XML_POM = "pom.xml";
private static final String JSON_POM = "pom.json";
private static final String JSON_EXT = ".json";
ObjectMapper objectMapper = new ObjectMapper();
@Requirement
private ModelReader modelReader;
@Override
public File locatePom(File projectDirectory) {
File pomFile = new File(projectDirectory, JSON_POM);
if (!pomFile.exists()) {
pomFile = new File(projectDirectory, XML_POM);
}
return pomFile;
}
@Override
public Model read(InputStream input, Map<String, ?> options) throws IOException, ModelParseException {
try (final Reader in = ReaderFactory.newPlatformReader(input)) {
return read(in, options);
}
}
@Override
public Model read(Reader reader, Map<String, ?> options) throws IOException, ModelParseException {
FileModelSource source = (options != null) ? (FileModelSource) options.get(SOURCE) : null;
if (source != null && source.getLocation().endsWith(JSON_EXT)) {
Model model = objectMapper.readValue(reader, Model.class);
return model;
}
//It's a normal maven project with a pom.xml file
return modelReader.read(reader, options);
}
@Override
public Model read(File input, Map<String, ?> options) throws IOException, ModelParseException {
return null;
}
}

8
maven-polyglot/maven-polyglot-yml-app/.mvn/extensions.xml Normal file
View File

@ -0,0 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<extensions>
<extension>
<groupId>io.takari.polyglot</groupId>
<artifactId>polyglot-yaml</artifactId>
<version>0.3.1</version>
</extension>
</extensions>

7
maven-polyglot/maven-polyglot-yml-app/pom.yml Normal file
View File

@ -0,0 +1,7 @@
modelVersion: 4.0.0
groupId: com.baeldung.maven.polyglot
artifactId: maven-polyglot-yml-app
version: 1.0-SNAPSHOT
name: 'YAML Demo'
properties: {maven.compiler.source: 1.8, maven.compiler.target: 1.8}

7
maven-polyglot/maven-polyglot-yml-app/src/main/java/com/baeldung/maven/polyglot/YamlDemoApplication.java Normal file
View File

@ -0,0 +1,7 @@
package com.baeldung.maven.polyglot;
public class YamlDemoApplication {
public static void main(String[] args) {
System.out.println("Hello Maven Polyglot YAML !");
}
}

109
maven-polyglot/maven-polyglot-yml-app/src/main/resources/model.json Normal file
View File

@ -0,0 +1,109 @@
{
"modules": [],
"distributionManagement": null,
"properties": {
"project.reporting.outputEncoding": "UTF-8",
"java.version": "1.8",
"maven.compiler.source": "1.8",
"project.build.sourceEncoding": "UTF-8",
"maven.compiler.target": "1.8"
},
"dependencyManagement": null,
"dependencies": [
{
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-web",
"version": null,
"type": "jar",
"classifier": null,
"scope": null,
"systemPath": null,
"exclusions": [],
"optional": null,
"managementKey": "org.springframework.boot:spring-boot-starter-web:jar"
}
],
"repositories": [],
"pluginRepositories": [],
"reports": null,
"reporting": null,
"modelVersion": "4.0.0",
"parent": {
"groupId": "org.springframework.boot",
"artifactId": "spring-boot-starter-parent",
"version": "2.0.5.RELEASE",
"relativePath": "",
"id": "org.springframework.boot:spring-boot-starter-parent:pom:2.0.5.RELEASE"
},
"groupId": "com.demo.polyglot",
"artifactId": "maven-polyglot-app",
"version": "1.0.1",
"packaging": "jar",
"name": "Json Maven Polyglot",
"description": null,
"url": null,
"inceptionYear": null,
"organization": null,
"licenses": [],
"developers": [],
"contributors": [],
"mailingLists": [],
"prerequisites": null,
"scm": null,
"issueManagement": null,
"ciManagement": null,
"build": {
"plugins": [
{
"inherited": null,
"configuration": null,
"inheritanceApplied": true,
"groupId": "org.liquibase",
"artifactId": "liquibase-maven-plugin",
"version": "3.0.5",
"extensions": null,
"executions": [],
"dependencies": [],
"goals": null,
"key": "org.liquibase:liquibase-maven-plugin",
"id": "org.liquibase:liquibase-maven-plugin:3.0.5",
"executionsAsMap": {}
}
],
"pluginManagement": null,
"defaultGoal": null,
"resources": [],
"testResources": [],
"directory": null,
"finalName": null,
"filters": [],
"sourceDirectory": null,
"scriptSourceDirectory": null,
"testSourceDirectory": null,
"outputDirectory": null,
"testOutputDirectory": null,
"extensions": [],
"pluginsAsMap": {
"org.liquibase:liquibase-maven-plugin": {
"inherited": null,
"configuration": null,
"inheritanceApplied": true,
"groupId": "org.liquibase",
"artifactId": "liquibase-maven-plugin",
"version": "3.0.5",
"extensions": null,
"executions": [],
"dependencies": [],
"goals": null,
"key": "org.liquibase:liquibase-maven-plugin",
"id": "org.liquibase:liquibase-maven-plugin:3.0.5",
"executionsAsMap": {}
}
}
},
"profiles": [],
"modelEncoding": "UTF-8",
"pomFile": null,
"id": "com.demo.polyglot:maven-polyglot-app:jar:1.0.1",
"projectDirectory": null
}

311
pom.xml
View File

@ -290,7 +290,7 @@
<profiles>
<profile>
<id>default</id>
<id>default-first</id>
<build>
<plugins>
@ -332,6 +332,7 @@
<module>annotations</module>
<module>apache-cxf</module>
<module>apache-fop</module>
<module>apache-geode</module>
<module>apache-poi</module>
<module>apache-tika</module>
<module>apache-thrift</module>
@ -522,9 +523,9 @@
<module>spring-rest-angular</module>
<module>spring-rest-full</module>
<module>spring-rest-query-language</module>
<module>spring-rest</module>
<!-- <module>spring-rest</module> --> <!-- temporarily disabled -->
<!-- <module>spring-rest-simple</module> --> <!-- temporarily disabled -->
<module>spring-resttemplate</module>
<module>spring-rest-simple</module>
<module>spring-security-acl</module>
<module>spring-security-cache-control</module>
<module>spring-security-client/spring-security-jsp-authentication</module>
@ -550,141 +551,180 @@
<module>spring-security-rest</module>
<module>spring-security-sso</module>
<module>spring-security-x509</module>
<module>spring-session</module>
<module>spring-sleuth</module>
<module>spring-social-login</module>
<module>spring-spel</module>
<module>spring-state-machine</module>
<module>spring-thymeleaf</module>
<module>spring-userservice</module>
<module>spring-zuul</module>
<module>spring-remoting</module>
<module>spring-reactor</module>
<module>spring-vertx</module>
<module>spring-jinq</module>
<module>spring-rest-embedded-tomcat</module>
<module>testing-modules/testing</module>
<module>testing-modules/testng</module>
<module>video-tutorials</module>
<module>xml</module>
<module>xmlunit-2</module>
<module>struts-2</module>
<module>apache-velocity</module>
<module>apache-solrj</module>
<module>rabbitmq</module>
<module>vertx</module>
<module>persistence-modules/spring-data-gemfire</module>
<module>mybatis</module>
<module>spring-drools</module>
<module>drools</module>
<module>persistence-modules/liquibase</module>
<module>spring-boot-property-exp</module>
<module>testing-modules/mockserver</module>
<module>testing-modules/test-containers</module>
<module>undertow</module>
<module>vaadin</module>
<module>vertx-and-rxjava</module>
<module>saas</module>
<module>deeplearning4j</module>
<module>lucene</module>
<module>vraptor</module>
<module>persistence-modules/java-cockroachdb</module>
<module>spring-security-thymeleaf</module>
<module>persistence-modules/java-jdbi</module>
<module>jersey</module>
<module>java-spi</module>
<module>performance-tests</module>
<module>twilio</module>
<module>spring-boot-ctx-fluent</module>
<module>java-ee-8-security-api</module>
<module>spring-webflux-amqp</module>
<module>antlr</module>
<module>maven-archetype</module>
<module>optaplanner</module>
<module>apache-meecrowave</module>
<module>spring-reactive-kotlin</module>
<module>jnosql</module>
<module>spring-boot-angular-ecommerce</module>
<module>cdi-portable-extension</module>
<module>jta</module>
<!--<module>java-dates</module> --> <!-- Commented because we have still not upgraded to java 9 -->
<module>java-websocket</module>
<module>activejdbc</module>
<module>animal-sniffer-mvn-plugin</module>
<module>apache-avro</module>
<module>apache-bval</module>
<module>apache-shiro</module>
<module>apache-spark</module>
<module>asciidoctor</module>
<module>checker-plugin</module>
<!-- <module>core-java-10</module> --><!-- Not upgraded to java 10 -->
<!-- <module>core-java-11</module> --><!-- Not upgraded to java 11 -->
<module>core-java-sun</module>
<module>custom-pmd</module>
<module>dagger</module>
<module>data-structures</module>
<module>dubbo</module>
<module>flyway</module>
<!-- <module>grpc</module> --><!-- protobuf-maven-plugin filecopy failure -->
<module>java-difference-date</module>
<!-- <module>JGit</module> --><!-- Unit test failure -->
<module>jni</module>
<module>jooby</module>
<!-- <module>micronaut</module> --><!-- Not upgraded to java 9 -->
<!-- <module>microprofile</module> --><!-- Takes too much time : Downloads 93 MBs zip and .. -->
<!-- <module>muleesb</module> --><!-- load main class org.mule.munit.remote.RemoteRunner -->
<module>ratpack</module>
<module>rest-with-spark-java</module>
<module>spring-boot-autoconfiguration</module>
<module>spring-boot-custom-starter</module>
<module>spring-boot-jasypt</module>
<module>spring-custom-aop</module>
<module>spring-data-rest-querydsl</module>
<module>spring-groovy</module>
<module>spring-mobile</module>
<module>spring-mustache</module>
<module>spring-mvc-simple</module>
<module>spring-mybatis</module>
<module>spring-rest-hal-browser</module>
<module>spring-rest-shell</module>
<module>spring-rest-template</module>
<module>spring-roo</module>
<module>spring-security-stormpath</module>
<module>sse-jaxrs</module>
<module>static-analysis</module>
<module>stripe</module>
<!-- <module>structurizr</module> --><!-- Artiifact not found -->
<module>Twitter4J</module>
<module>wicket</module>
<module>xstream</module>
<module>cas/cas-secured-app</module>
<module>cas/cas-server</module>
<!-- <module>graphql/graphql-java</module> --><!-- Wrong parent -->
<!-- <module>guest/deep-jsf</module> --><!-- guest post on different site -->
<!-- <module>guest/junit5-example</module> --><!-- guest post on different site - Compilation failure -->
<!-- <module>guest/log4j2-example</module> --><!-- guest post on different site -->
<!-- <module>guest/logback-example</module> --><!-- guest post on different site -->
<!-- <module>guest/memory-leaks</module> --><!-- guest post on different site -->
<!-- <module>guest/remote-debugging</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-boot-app</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-mvc</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-security</module> --><!-- guest post on different site -->
<!-- <module>guest/thread-pools</module> --><!-- guest post on different site -->
<!-- <module>guest/tomcat-app</module> --><!-- guest post on different site -->
<module>jenkins/hello-world</module>
<!-- <module>rule-engines/easy-rules</module> --><!-- Wrong Parent -->
<!-- <module>rule-engines/openl-tablets</module> --><!-- Wrong Parent -->
<!-- <module>rule-engines/rulebook</module> --><!-- Wrong Parent -->
<module>spring-boot-custom-starter/greeter</module>
<module>spring-boot-h2/spring-boot-h2-database</module>
<!--module>spring-boot-h2/spring-boot-h2-remote-app</module-->
<!-- <module>guest\webservices\rest-client</module> --><!-- guest post on different site -->
<!-- <module>guest\webservices\rest-server</module> --><!-- guest post on different site -->
<!-- <module>guest\webservices\spring-rest-service</module> --><!-- guest post on different site -->
</modules>
</profile>
<profile>
<id>default-second</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<forkCount>3</forkCount>
<reuseForks>true</reuseForks>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*IntTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
<exclude>**/JdbcTest.java</exclude>
<exclude>**/*LiveTest.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<modules>
<module>parent-boot-1</module>
<module>parent-boot-2</module>
<module>parent-spring-4</module>
<module>parent-spring-5</module>
<module>parent-java</module>
<module>parent-kotlin</module>
<module>spring-session</module>
<module>spring-sleuth</module>
<module>spring-social-login</module>
<module>spring-spel</module>
<module>spring-state-machine</module>
<module>spring-thymeleaf</module>
<module>spring-userservice</module>
<module>spring-zuul</module>
<module>spring-remoting</module>
<module>spring-reactor</module>
<module>spring-vertx</module>
<module>spring-jinq</module>
<module>spring-rest-embedded-tomcat</module>
<module>testing-modules/testing</module>
<module>testing-modules/testng</module>
<module>video-tutorials</module>
<module>xml</module>
<module>xmlunit-2</module>
<module>struts-2</module>
<module>apache-velocity</module>
<module>apache-solrj</module>
<module>rabbitmq</module>
<module>vertx</module>
<module>persistence-modules/spring-data-gemfire</module>
<module>mybatis</module>
<module>spring-drools</module>
<module>drools</module>
<module>persistence-modules/liquibase</module>
<module>spring-boot-property-exp</module>
<module>testing-modules/mockserver</module>
<module>testing-modules/test-containers</module>
<module>undertow</module>
<module>vaadin</module>
<module>vertx-and-rxjava</module>
<module>saas</module>
<module>deeplearning4j</module>
<module>lucene</module>
<module>vraptor</module>
<module>persistence-modules/java-cockroachdb</module>
<module>spring-security-thymeleaf</module>
<module>persistence-modules/java-jdbi</module>
<module>jersey</module>
<module>java-spi</module>
<module>performance-tests</module>
<module>twilio</module>
<module>spring-boot-ctx-fluent</module>
<module>java-ee-8-security-api</module>
<module>spring-webflux-amqp</module>
<module>antlr</module>
<module>maven-archetype</module>
<module>optaplanner</module>
<module>apache-meecrowave</module>
<module>spring-reactive-kotlin</module>
<module>jnosql</module>
<module>spring-boot-angular-ecommerce</module>
<module>cdi-portable-extension</module>
<module>jta</module>
<!--<module>java-dates</module> --> <!-- Commented because we have still not upgraded to java 9 -->
<module>java-websocket</module>
<module>activejdbc</module>
<module>animal-sniffer-mvn-plugin</module>
<module>apache-avro</module>
<module>apache-bval</module>
<module>apache-shiro</module>
<module>apache-spark</module>
<module>asciidoctor</module>
<module>checker-plugin</module>
<!-- <module>core-java-10</module> --><!-- Not upgraded to java 10 -->
<!-- <module>core-java-11</module> --><!-- Not upgraded to java 11 -->
<module>core-java-sun</module>
<module>custom-pmd</module>
<module>dagger</module>
<module>data-structures</module>
<module>dubbo</module>
<module>flyway</module>
<!-- <module>grpc</module> --><!-- protobuf-maven-plugin filecopy failure -->
<module>java-difference-date</module>
<!-- <module>JGit</module> --><!-- Unit test failure -->
<module>jni</module>
<module>jooby</module>
<!-- <module>micronaut</module> --><!-- Not upgraded to java 9 -->
<!-- <module>microprofile</module> --><!-- Takes too much time : Downloads 93 MBs zip and .. -->
<!-- <module>muleesb</module> --><!-- load main class org.mule.munit.remote.RemoteRunner -->
<module>ratpack</module>
<module>rest-with-spark-java</module>
<module>spring-boot-autoconfiguration</module>
<module>spring-boot-custom-starter</module>
<module>spring-boot-jasypt</module>
<module>spring-custom-aop</module>
<module>spring-data-rest-querydsl</module>
<module>spring-groovy</module>
<module>spring-mobile</module>
<module>spring-mustache</module>
<module>spring-mvc-simple</module>
<module>spring-mybatis</module>
<module>spring-rest-hal-browser</module>
<module>spring-rest-shell</module>
<module>spring-rest-template</module>
<module>spring-roo</module>
<module>spring-security-stormpath</module>
<module>sse-jaxrs</module>
<module>static-analysis</module>
<module>stripe</module>
<!-- <module>structurizr</module> --><!-- Artiifact not found -->
<module>Twitter4J</module>
<module>wicket</module>
<module>xstream</module>
<module>cas/cas-secured-app</module>
<module>cas/cas-server</module>
<!-- <module>graphql/graphql-java</module> --><!-- Wrong parent -->
<!-- <module>guest/deep-jsf</module> --><!-- guest post on different site -->
<!-- <module>guest/junit5-example</module> --><!-- guest post on different site - Compilation failure -->
<!-- <module>guest/log4j2-example</module> --><!-- guest post on different site -->
<!-- <module>guest/logback-example</module> --><!-- guest post on different site -->
<!-- <module>guest/memory-leaks</module> --><!-- guest post on different site -->
<!-- <module>guest/remote-debugging</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-boot-app</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-mvc</module> --><!-- guest post on different site -->
<!-- <module>guest/spring-security</module> --><!-- guest post on different site -->
<!-- <module>guest/thread-pools</module> --><!-- guest post on different site -->
<!-- <module>guest/tomcat-app</module> --><!-- guest post on different site -->
<!-- <module>jenkins/hello-world</module> --> <!-- disabled in the default profile -->
<!-- <module>rule-engines/easy-rules</module> --><!-- Wrong Parent -->
<!-- <module>rule-engines/openl-tablets</module> --><!-- Wrong Parent -->
<!-- <module>rule-engines/rulebook</module> --><!-- Wrong Parent -->
<module>spring-boot-custom-starter/greeter</module>
<module>spring-boot-h2/spring-boot-h2-database</module>
<!--module>spring-boot-h2/spring-boot-h2-remote-app</module-->
<!-- <module>guest\webservices\rest-client</module> --><!-- guest post on different site -->
<!-- <module>guest\webservices\rest-server</module> --><!-- guest post on different site -->
<!-- <module>guest\webservices\spring-rest-service</module> --><!-- guest post on different site -->
<module>flyway-cdi-extension</module>
</modules>
</profile>
<profile>
<id>spring-context</id>
<build>
@ -1033,7 +1073,7 @@
<module>spring-rest</module>
<module>spring-resttemplate</module>
<module>spring-rest-simple</module>
<module>spring-reactive-kotlin</module>
<module>spring-reactive-kotlin</module>
<!-- group 3.2 - Pass, 8 minutes, 1 failed test, 2,294 KB log -->
@ -1447,7 +1487,6 @@
<module>spring-security-thymeleaf</module>
<module>persistence-modules/java-jdbi</module>
<module>jersey</module>
<module>jersey-client-rx</module>
<module>java-spi</module>
<module>performance-tests</module>
<module>twilio</module>

16
spring-boot/pom.xml
View File

@ -145,6 +145,20 @@
<artifactId>chaos-monkey-spring-boot</artifactId>
<version>${chaos.monkey.version}</version>
</dependency>
<!-- for Graylog demo -->
<dependency>
<!-- forcing spring boot 1.x sing log4j was dropped in spring boot 1.4 and beyond -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j</artifactId>
<version>1.3.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.graylog2</groupId>
<artifactId>gelfj</artifactId>
<version>1.1.16</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
@ -224,4 +238,4 @@
<git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
</properties>
</project>
</project>

17
spring-boot/src/main/java/com/baeldung/graylog/GraylogDemoApplication.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung.graylog;
import org.apache.log4j.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class GraylogDemoApplication {
private final static Logger LOG =
Logger.getLogger(GraylogDemoApplication.class);
public static void main(String[] args) {
SpringApplication.run(GraylogDemoApplication.class, args);
LOG.info("Hello from Spring Boot");
}
}

24
spring-boot/src/main/resources/log4j.xml Normal file
View File

@ -0,0 +1,24 @@
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd">
<log4j:configuration>
<appender name="stdout" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${PID:- } [%t] --- %-40.40logger{39} : %m%n"/>
</layout>
</appender>
<appender name="graylog" class="org.graylog2.log.GelfAppender">
<param name="graylogHost" value="18.217.253.212"/>
<param name="originHost" value="localhost"/>
<param name="graylogPort" value="12201"/>
<param name="extractStacktrace" value="true"/>
<param name="addExtendedInformation" value="true"/>
<param name="facility" value="log4j"/>
<param name="Threshold" value="DEBUG"/>
<param name="additionalFields" value="{'environment': 'DEV', 'application': 'GraylogDemoApplication'}"/>
</appender>
<root>
<priority value="DEBUG"/>
<appender-ref ref="stdout"/>
<appender-ref ref="graylog"/>
</root>
</log4j:configuration>