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

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Karsten Silz 2020-05-14 14:18:29 +01:00
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1
algorithms-miscellaneous-3/README.md
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@ -13,6 +13,5 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Checking if a Java Graph has a Cycle](https://www.baeldung.com/java-graph-has-a-cycle)
- [A Guide to the Folding Technique in Java](https://www.baeldung.com/folding-hashing-technique)
- [Creating a Triangle with for Loops in Java](https://www.baeldung.com/java-print-triangle)
- [Efficient Word Frequency Calculator in Java](https://www.baeldung.com/java-word-frequency)
- [The K-Means Clustering Algorithm in Java](https://www.baeldung.com/java-k-means-clustering-algorithm)
- More articles: [[<-- prev]](/algorithms-miscellaneous-2) [[next -->]](/algorithms-miscellaneous-4)

8
algorithms-miscellaneous-5/README.md
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@ -15,9 +15,5 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Maximum Subarray Problem](https://www.baeldung.com/java-maximum-subarray)
- [How to Merge Two Sorted Arrays](https://www.baeldung.com/java-merge-sorted-arrays)
- [Median of Stream of Integers using Heap](https://www.baeldung.com/java-stream-integers-median-using-heap)
- [Kruskal’s Algorithm for Spanning Trees](https://www.baeldung.com/java-spanning-trees-kruskal)
- [Balanced Brackets Algorithm in Java](https://www.baeldung.com/java-balanced-brackets-algorithm)
- [Efficiently Merge Sorted Java Sequences](https://www.baeldung.com/java-merge-sorted-sequences)
- [Introduction to Greedy Algorithms with Java](https://www.baeldung.com/java-greedy-algorithms)
- [The Caesar Cipher in Java](https://www.baeldung.com/java-caesar-cipher)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-4)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-4) [[next -->]](/../algorithms-miscellaneous-6)

6
algorithms-miscellaneous-5/pom.xml
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@ -25,12 +25,6 @@
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>pl.allegro.finance</groupId>
<artifactId>tradukisto</artifactId>

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algorithms-miscellaneous-6/README.md Normal file
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@ -0,0 +1,10 @@
### Relevant Articles:
- [Boruvka’s Algorithm for Minimum Spanning Trees](https://www.baeldung.com/java-boruvka-algorithm)
- [Gradient Descent in Java](https://www.baeldung.com/java-gradient-descent)
- [Kruskal’s Algorithm for Spanning Trees](https://www.baeldung.com/java-spanning-trees-kruskal)
- [Balanced Brackets Algorithm in Java](https://www.baeldung.com/java-balanced-brackets-algorithm)
- [Efficiently Merge Sorted Java Sequences](https://www.baeldung.com/java-merge-sorted-sequences)
- [Introduction to Greedy Algorithms with Java](https://www.baeldung.com/java-greedy-algorithms)
- [The Caesar Cipher in Java](https://www.baeldung.com/java-caesar-cipher)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-5)

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algorithms-miscellaneous-6/pom.xml
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@ -18,10 +18,35 @@
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-commons</artifactId>
<version>${junit.platform.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${org.assertj.core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
</dependencies>
<properties>
<guava.version>28.1-jre</guava.version>
<org.assertj.core.version>3.9.0</org.assertj.core.version>
<junit.platform.version>1.6.0</junit.platform.version>
<commons-math3.version>3.6.1</commons-math3.version>
</properties>
</project>

0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDeque.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDeque.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingString.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingString.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/caesarcipher/CaesarCipher.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/caesarcipher/CaesarCipher.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/Follower.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/Follower.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/FollowersPath.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/FollowersPath.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/GreedyAlgorithm.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/GreedyAlgorithm.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/NonGreedyAlgorithm.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/NonGreedyAlgorithm.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/SocialConnector.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/SocialConnector.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/SocialUser.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/SocialUser.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/CycleDetector.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/CycleDetector.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/DisjointSetInfo.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/DisjointSetInfo.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/Kruskal.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/Kruskal.java
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26
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/minheapmerge/HeapNode.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/minheapmerge/HeapNode.java
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@ -1,13 +1,13 @@
package com.baeldung.algorithms.minheapmerge;
public class HeapNode {
int element;
int arrayIndex;
int nextElementIndex = 1;
public HeapNode(int element, int arrayIndex) {
this.element = element;
this.arrayIndex = arrayIndex;
}
}
package com.baeldung.algorithms.minheapmerge;
public class HeapNode {
int element;
int arrayIndex;
int nextElementIndex = 1;
public HeapNode(int element, int arrayIndex) {
this.element = element;
this.arrayIndex = arrayIndex;
}
}

176
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/minheapmerge/MinHeap.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/minheapmerge/MinHeap.java
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@ -1,88 +1,88 @@
package com.baeldung.algorithms.minheapmerge;
public class MinHeap {
HeapNode[] heapNodes;
public MinHeap(HeapNode heapNodes[]) {
this.heapNodes = heapNodes;
heapifyFromLastLeafsParent();
}
void heapifyFromLastLeafsParent() {
int lastLeafsParentIndex = getParentNodeIndex(heapNodes.length);
while (lastLeafsParentIndex >= 0) {
heapify(lastLeafsParentIndex);
lastLeafsParentIndex--;
}
}
void heapify(int index) {
int leftNodeIndex = getLeftNodeIndex(index);
int rightNodeIndex = getRightNodeIndex(index);
int smallestElementIndex = index;
if (leftNodeIndex < heapNodes.length && heapNodes[leftNodeIndex].element < heapNodes[index].element) {
smallestElementIndex = leftNodeIndex;
}
if (rightNodeIndex < heapNodes.length && heapNodes[rightNodeIndex].element < heapNodes[smallestElementIndex].element) {
smallestElementIndex = rightNodeIndex;
}
if (smallestElementIndex != index) {
swap(index, smallestElementIndex);
heapify(smallestElementIndex);
}
}
int getParentNodeIndex(int index) {
return (index - 1) / 2;
}
int getLeftNodeIndex(int index) {
return (2 * index + 1);
}
int getRightNodeIndex(int index) {
return (2 * index + 2);
}
HeapNode getRootNode() {
return heapNodes[0];
}
void heapifyFromRoot() {
heapify(0);
}
void swap(int i, int j) {
HeapNode temp = heapNodes[i];
heapNodes[i] = heapNodes[j];
heapNodes[j] = temp;
}
static int[] merge(int[][] array) {
HeapNode[] heapNodes = new HeapNode[array.length];
int resultingArraySize = 0;
for (int i = 0; i < array.length; i++) {
HeapNode node = new HeapNode(array[i][0], i);
heapNodes[i] = node;
resultingArraySize += array[i].length;
}
MinHeap minHeap = new MinHeap(heapNodes);
int[] resultingArray = new int[resultingArraySize];
for (int i = 0; i < resultingArraySize; i++) {
HeapNode root = minHeap.getRootNode();
resultingArray[i] = root.element;
if (root.nextElementIndex < array[root.arrayIndex].length) {
root.element = array[root.arrayIndex][root.nextElementIndex++];
} else {
root.element = Integer.MAX_VALUE;
}
minHeap.heapifyFromRoot();
}
return resultingArray;
}
}
package com.baeldung.algorithms.minheapmerge;
public class MinHeap {
HeapNode[] heapNodes;
public MinHeap(HeapNode heapNodes[]) {
this.heapNodes = heapNodes;
heapifyFromLastLeafsParent();
}
void heapifyFromLastLeafsParent() {
int lastLeafsParentIndex = getParentNodeIndex(heapNodes.length);
while (lastLeafsParentIndex >= 0) {
heapify(lastLeafsParentIndex);
lastLeafsParentIndex--;
}
}
void heapify(int index) {
int leftNodeIndex = getLeftNodeIndex(index);
int rightNodeIndex = getRightNodeIndex(index);
int smallestElementIndex = index;
if (leftNodeIndex < heapNodes.length && heapNodes[leftNodeIndex].element < heapNodes[index].element) {
smallestElementIndex = leftNodeIndex;
}
if (rightNodeIndex < heapNodes.length && heapNodes[rightNodeIndex].element < heapNodes[smallestElementIndex].element) {
smallestElementIndex = rightNodeIndex;
}
if (smallestElementIndex != index) {
swap(index, smallestElementIndex);
heapify(smallestElementIndex);
}
}
int getParentNodeIndex(int index) {
return (index - 1) / 2;
}
int getLeftNodeIndex(int index) {
return (2 * index + 1);
}
int getRightNodeIndex(int index) {
return (2 * index + 2);
}
HeapNode getRootNode() {
return heapNodes[0];
}
void heapifyFromRoot() {
heapify(0);
}
void swap(int i, int j) {
HeapNode temp = heapNodes[i];
heapNodes[i] = heapNodes[j];
heapNodes[j] = temp;
}
static int[] merge(int[][] array) {
HeapNode[] heapNodes = new HeapNode[array.length];
int resultingArraySize = 0;
for (int i = 0; i < array.length; i++) {
HeapNode node = new HeapNode(array[i][0], i);
heapNodes[i] = node;
resultingArraySize += array[i].length;
}
MinHeap minHeap = new MinHeap(heapNodes);
int[] resultingArray = new int[resultingArraySize];
for (int i = 0; i < resultingArraySize; i++) {
HeapNode root = minHeap.getRootNode();
resultingArray[i] = root.element;
if (root.nextElementIndex < array[root.arrayIndex].length) {
root.element = array[root.arrayIndex][root.nextElementIndex++];
} else {
root.element = Integer.MAX_VALUE;
}
minHeap.heapifyFromRoot();
}
return resultingArray;
}
}

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDequeUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDequeUnitTest.java
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0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingStringUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingStringUnitTest.java
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0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/caesarcipher/CaesarCipherUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/caesarcipher/CaesarCipherUnitTest.java
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0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/greedy/GreedyAlgorithmUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/greedy/GreedyAlgorithmUnitTest.java
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0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/kruskal/KruskalUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/kruskal/KruskalUnitTest.java
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44
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/minheapmerge/MinHeapUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/minheapmerge/MinHeapUnitTest.java
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@ -1,22 +1,22 @@
package com.baeldung.algorithms.minheapmerge;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import org.junit.Test;
public class MinHeapUnitTest {
private final int[][] inputArray = { { 0, 6 }, { 1, 5, 10, 100 }, { 2, 4, 200, 650 } };
private final int[] expectedArray = { 0, 1, 2, 4, 5, 6, 10, 100, 200, 650 };
@Test
public void givenSortedArrays_whenMerged_thenShouldReturnASingleSortedarray() {
int[] resultArray = MinHeap.merge(inputArray);
assertThat(resultArray.length, is(equalTo(10)));
assertThat(resultArray, is(equalTo(expectedArray)));
}
}
package com.baeldung.algorithms.minheapmerge;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import org.junit.Test;
public class MinHeapUnitTest {
private final int[][] inputArray = { { 0, 6 }, { 1, 5, 10, 100 }, { 2, 4, 200, 650 } };
private final int[] expectedArray = { 0, 1, 2, 4, 5, 6, 10, 100, 200, 650 };
@Test
public void givenSortedArrays_whenMerged_thenShouldReturnASingleSortedarray() {
int[] resultArray = MinHeap.merge(inputArray);
assertThat(resultArray.length, is(equalTo(10)));
assertThat(resultArray, is(equalTo(expectedArray)));
}
}

4
algorithms-sorting-2/README.md
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@ -1,3 +1,7 @@
### Relevant Articles:
- [Sorting a String Alphabetically in Java](https://www.baeldung.com/java-sort-string-alphabetically)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [How an In-Place Sorting Algorithm Works](https://www.baeldung.com/java-in-place-sorting)
- [Partitioning and Sorting Arrays with Many Repeated Entries](https://www.baeldung.com/java-sorting-arrays-with-repeated-entries)
- More articles: [[<-- prev]](/algorithms-sorting)

2
algorithms-sorting/src/main/java/com/baeldung/algorithms/sort/bynumber/NaturalOrderComparators.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/bynumber/NaturalOrderComparators.java
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@ -1,4 +1,4 @@
package com.baeldung.algorithms.sort.bynumber;
package com.baeldung.algorithms.bynumber;
import java.util.Comparator;

0
algorithms-sorting/src/main/java/com/baeldung/algorithms/inoutsort/InOutSort.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/inoutsort/InOutSort.java
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0
algorithms-sorting/src/main/java/com/baeldung/algorithms/stringsort/AnagramValidator.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/stringsort/AnagramValidator.java
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3
algorithms-sorting/src/test/java/com/baeldung/algorithms/sort/bynumber/NaturalOrderComparatorsUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/bynumber/NaturalOrderComparatorsUnitTest.java
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@ -1,6 +1,5 @@
package com.baeldung.algorithms.sort.bynumber;
package com.baeldung.algorithms.bynumber;
import com.baeldung.algorithms.sort.bynumber.NaturalOrderComparators;
import org.junit.Test;
import java.util.ArrayList;

0
algorithms-sorting/src/test/java/com/baeldung/algorithms/inoutsort/InOutSortUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/inoutsort/InOutSortUnitTest.java
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0
algorithms-sorting/src/test/java/com/baeldung/algorithms/stringsort/AnagramValidatorUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/stringsort/AnagramValidatorUnitTest.java
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0
algorithms-sorting/src/test/java/com/baeldung/algorithms/stringsort/SortStringUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/stringsort/SortStringUnitTest.java
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5
algorithms-sorting/README.md
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@ -11,10 +11,7 @@ This module contains articles about sorting algorithms.
- [Heap Sort in Java](https://www.baeldung.com/java-heap-sort)
- [Shell Sort in Java](https://www.baeldung.com/java-shell-sort)
- [Counting Sort in Java](https://www.baeldung.com/java-counting-sort)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [How an In-Place Sorting Algorithm Works](https://www.baeldung.com/java-in-place-sorting)
- [Selection Sort in Java](https://www.baeldung.com/java-selection-sort)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [Radix Sort in Java](https://www.baeldung.com/java-radix-sort)
- [Sorting a String Alphabetically in Java](https://www.baeldung.com/java-sort-string-alphabetically)
- [Bucket Sort in Java](https://www.baeldung.com/java-bucket-sort)
- More articles: [[next -->]](/algorithms-sorintg-2)

3
apache-olingo/olingo2/README.md
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@ -1,3 +0,0 @@
### Relevant Articles:
- [Intro to OData with Olingo](https://www.baeldung.com/olingo)

4
apache-shiro/pom.xml
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@ -10,9 +10,9 @@
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-boot-1</artifactId>
<artifactId>parent-boot-2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-boot-1</relativePath>
<relativePath>../parent-boot-2</relativePath>
</parent>
<dependencies>

7
apache-shiro/src/main/java/com/baeldung/Main.java
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@ -1,11 +1,14 @@
package com.baeldung;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.realm.text.IniRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.slf4j.Logger;

22
apache-shiro/src/main/java/com/baeldung/MyCustomRealm.java
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@ -1,16 +1,24 @@
package com.baeldung;
import org.apache.shiro.authc.*;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.jdbc.JdbcRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.*;
public class MyCustomRealm extends JdbcRealm {

9
apache-shiro/src/main/java/com/baeldung/shiro/permissions/custom/Main.java
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@ -1,14 +1,15 @@
package com.baeldung.shiro.permissions.custom;
import com.baeldung.MyCustomRealm;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.config.Ini;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.realm.text.IniRealm;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

6
atomikos/README.md Normal file
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@ -0,0 +1,6 @@
## Atomikos
This module contains articles about Atomikos
### Relevant Articles:
- [A Guide to Atomikos](https://www.baeldung.com/java-atomikos)

119
atomikos/pom.xml Normal file
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@ -0,0 +1,119 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>atomikos</artifactId>
<name>atomikos</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.atomikos</groupId>
<artifactId>transactions-jdbc</artifactId>
<version>${atomikos-version}</version>
</dependency>
<dependency>
<groupId>com.atomikos</groupId>
<artifactId>transactions-jms</artifactId>
<version>${atomikos-version}</version>
</dependency>
<dependency>
<groupId>com.atomikos</groupId>
<artifactId>transactions-hibernate4</artifactId>
<version>${atomikos-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.11.23.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-core</artifactId>
<version>5.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.derby</groupId>
<artifactId>derby</artifactId>
<version>10.8.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- the JTA API -->
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.specs</groupId>
<artifactId>geronimo-jta_1.0.1B_spec</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>2.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.1.2.Final</version>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.el</artifactId>
<version>2.2.4</version>
</dependency>
</dependencies>
<properties>
<atomikos-version>5.0.6</atomikos-version>
<spring-version>5.1.6.RELEASE</spring-version>
<hibernate.version>5.4.3.Final</hibernate.version>
</properties>
</project>

53
atomikos/src/main/java/com/baeldung/atomikos/direct/Application.java Normal file
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package com.baeldung.atomikos.direct;
import java.sql.Connection;
import java.sql.Statement;
import java.util.UUID;
import javax.sql.DataSource;
import com.atomikos.icatch.jta.UserTransactionImp;
public class Application {
private DataSource inventoryDataSource;
private DataSource orderDataSource;
public Application(DataSource inventoryDataSource, DataSource orderDataSource) {
this.inventoryDataSource = inventoryDataSource;
this.orderDataSource = orderDataSource;
}
public void placeOrder(String productId, int amount) throws Exception {
UserTransactionImp utx = new UserTransactionImp();
String orderId = UUID.randomUUID()
.toString();
boolean rollback = false;
try {
utx.begin();
Connection inventoryConnection = inventoryDataSource.getConnection();
Connection orderConnection = orderDataSource.getConnection();
Statement s1 = inventoryConnection.createStatement();
String q1 = "update Inventory set balance = balance - " + amount + " where productId ='" + productId + "'";
s1.executeUpdate(q1);
s1.close();
Statement s2 = orderConnection.createStatement();
String q2 = "insert into Orders values ( '" + orderId + "', '" + productId + "', " + amount + " )";
s2.executeUpdate(q2);
s2.close();
inventoryConnection.close();
orderConnection.close();
} catch (Exception e) {
System.out.println(e.getMessage());
rollback = true;
} finally {
if (!rollback)
utx.commit();
else
utx.rollback();
}
}
}

41
atomikos/src/main/java/com/baeldung/atomikos/spring/Application.java Normal file
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package com.baeldung.atomikos.spring;
import java.sql.Connection;
import java.sql.Statement;
import java.util.UUID;
import javax.sql.DataSource;
import org.springframework.transaction.annotation.Transactional;
public class Application {
private DataSource inventoryDataSource;
private DataSource orderDataSource;
public Application(DataSource inventoryDataSource, DataSource orderDataSource) {
this.inventoryDataSource = inventoryDataSource;
this.orderDataSource = orderDataSource;
}
@Transactional(rollbackFor = Exception.class)
public void placeOrder(String productId, int amount) throws Exception {
String orderId = UUID.randomUUID()
.toString();
Connection inventoryConnection = inventoryDataSource.getConnection();
Connection orderConnection = orderDataSource.getConnection();
Statement s1 = inventoryConnection.createStatement();
String q1 = "update Inventory set balance = balance - " + amount + " where productId ='" + productId + "'";
s1.executeUpdate(q1);
s1.close();
Statement s2 = orderConnection.createStatement();
String q2 = "insert into Orders values ( '" + orderId + "', '" + productId + "', " + amount + " )";
s2.executeUpdate(q2);
s2.close();
inventoryConnection.close();
orderConnection.close();
}
}

68
atomikos/src/main/java/com/baeldung/atomikos/spring/config/Config.java Normal file
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package com.baeldung.atomikos.spring.config;
import java.util.Properties;
import javax.transaction.SystemException;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.jta.JtaTransactionManager;
import com.atomikos.icatch.jta.UserTransactionManager;
import com.atomikos.jdbc.AtomikosDataSourceBean;
import com.baeldung.atomikos.spring.Application;
@Configuration
@EnableTransactionManagement
public class Config {
@Bean(initMethod = "init", destroyMethod = "close")
public AtomikosDataSourceBean inventoryDataSource() {
AtomikosDataSourceBean dataSource = new AtomikosDataSourceBean();
dataSource.setLocalTransactionMode(true);
dataSource.setUniqueResourceName("db1");
dataSource.setXaDataSourceClassName("org.apache.derby.jdbc.EmbeddedXADataSource");
Properties xaProperties = new Properties();
xaProperties.put("databaseName", "db1");
xaProperties.put("createDatabase", "create");
dataSource.setXaProperties(xaProperties);
dataSource.setPoolSize(10);
return dataSource;
}
@Bean(initMethod = "init", destroyMethod = "close")
public AtomikosDataSourceBean orderDataSource() {
AtomikosDataSourceBean dataSource = new AtomikosDataSourceBean();
dataSource.setLocalTransactionMode(true);
dataSource.setUniqueResourceName("db2");
dataSource.setXaDataSourceClassName("org.apache.derby.jdbc.EmbeddedXADataSource");
Properties xaProperties = new Properties();
xaProperties.put("databaseName", "db2");
xaProperties.put("createDatabase", "create");
dataSource.setXaProperties(xaProperties);
dataSource.setPoolSize(10);
return dataSource;
}
@Bean(initMethod = "init", destroyMethod = "close")
public UserTransactionManager userTransactionManager() throws SystemException {
UserTransactionManager userTransactionManager = new UserTransactionManager();
userTransactionManager.setTransactionTimeout(300);
userTransactionManager.setForceShutdown(true);
return userTransactionManager;
}
@Bean
public JtaTransactionManager jtaTransactionManager() throws SystemException {
JtaTransactionManager jtaTransactionManager = new JtaTransactionManager();
jtaTransactionManager.setTransactionManager(userTransactionManager());
jtaTransactionManager.setUserTransaction(userTransactionManager());
return jtaTransactionManager;
}
@Bean
public Application application() {
return new Application(inventoryDataSource(), orderDataSource());
}
}

48
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/Application.java Normal file
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package com.baeldung.atomikos.spring.jpa;
import java.util.Set;
import java.util.UUID;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import com.baeldung.atomikos.spring.jpa.inventory.Inventory;
import com.baeldung.atomikos.spring.jpa.inventory.InventoryRepository;
import com.baeldung.atomikos.spring.jpa.order.Order;
import com.baeldung.atomikos.spring.jpa.order.OrderRepository;
public class Application {
@Autowired
private InventoryRepository inventoryRepository;
@Autowired
private OrderRepository orderRepository;
@Transactional(rollbackFor = Exception.class)
public void placeOrder(String productId, int amount) throws Exception {
String orderId = UUID.randomUUID()
.toString();
Inventory inventory = inventoryRepository.findOne(productId);
inventory.setBalance(inventory.getBalance() - amount);
inventoryRepository.save(inventory);
Order order = new Order();
order.setOrderId(orderId);
order.setProductId(productId);
order.setAmount(new Long(amount));
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<Order>> violations = validator.validate(order);
if (violations.size() > 0)
throw new Exception("Invalid instance of an order.");
orderRepository.save(order);
}
}

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atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/config/Config.java Normal file
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package com.baeldung.atomikos.spring.jpa.config;
import javax.transaction.SystemException;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.jta.JtaTransactionManager;
import com.atomikos.icatch.jta.UserTransactionManager;
import com.baeldung.atomikos.spring.jpa.Application;
@Configuration
@EnableTransactionManagement
public class Config {
@Bean(initMethod = "init", destroyMethod = "close")
public UserTransactionManager userTransactionManager() throws SystemException {
UserTransactionManager userTransactionManager = new UserTransactionManager();
userTransactionManager.setTransactionTimeout(300);
userTransactionManager.setForceShutdown(true);
return userTransactionManager;
}
@Bean
public JtaTransactionManager transactionManager() throws SystemException {
JtaTransactionManager jtaTransactionManager = new JtaTransactionManager();
jtaTransactionManager.setTransactionManager(userTransactionManager());
jtaTransactionManager.setUserTransaction(userTransactionManager());
return jtaTransactionManager;
}
@Bean
public Application application() {
return new Application();
}
}

31
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/inventory/Inventory.java Normal file
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package com.baeldung.atomikos.spring.jpa.inventory;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "INVENTORY")
public class Inventory {
@Id
private String productId;
private Long balance;
public String getProductId() {
return productId;
}
public void setProductId(String productId) {
this.productId = productId;
}
public Long getBalance() {
return balance;
}
public void setBalance(Long balance) {
this.balance = balance;
}
}

53
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/inventory/InventoryConfig.java Normal file
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package com.baeldung.atomikos.spring.jpa.inventory;
import java.util.Properties;
import javax.persistence.EntityManagerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import com.atomikos.jdbc.AtomikosDataSourceBean;
@Configuration
@EnableJpaRepositories(basePackages = "com.baeldung.atomikos.spring.jpa.inventory", entityManagerFactoryRef = "inventoryEntityManager", transactionManagerRef = "transactionManager")
public class InventoryConfig {
@Bean(initMethod = "init", destroyMethod = "close")
public AtomikosDataSourceBean inventoryDataSource() {
AtomikosDataSourceBean dataSource = new AtomikosDataSourceBean();
dataSource.setLocalTransactionMode(true);
dataSource.setUniqueResourceName("db1");
dataSource.setXaDataSourceClassName("org.apache.derby.jdbc.EmbeddedXADataSource");
Properties xaProperties = new Properties();
xaProperties.put("databaseName", "db1");
xaProperties.put("createDatabase", "create");
dataSource.setXaProperties(xaProperties);
dataSource.setPoolSize(10);
return dataSource;
}
@Bean
public EntityManagerFactory inventoryEntityManager() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.baeldung.atomikos.spring.jpa.inventory");
factory.setDataSource(inventoryDataSource());
Properties jpaProperties = new Properties();
//jpaProperties.put("hibernate.show_sql", "true");
//jpaProperties.put("hibernate.format_sql", "true");
jpaProperties.put("hibernate.dialect", "org.hibernate.dialect.DerbyDialect");
jpaProperties.put("hibernate.current_session_context_class", "jta");
jpaProperties.put("javax.persistence.transactionType", "jta");
jpaProperties.put("hibernate.transaction.manager_lookup_class", "com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup");
jpaProperties.put("hibernate.hbm2ddl.auto", "create-drop");
factory.setJpaProperties(jpaProperties);
factory.afterPropertiesSet();
return factory.getObject();
}
}

9
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/inventory/InventoryRepository.java Normal file
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package com.baeldung.atomikos.spring.jpa.inventory;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface InventoryRepository extends JpaRepository<Inventory, String> {
}

42
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/order/Order.java Normal file
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package com.baeldung.atomikos.spring.jpa.order;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.Max;
@Entity
@Table(name = "ORDERS")
public class Order {
@Id
private String orderId;
private String productId;
@Max(5)
private Long amount;
public String getOrderId() {
return orderId;
}
public void setOrderId(String orderId) {
this.orderId = orderId;
}
public String getProductId() {
return productId;
}
public void setProductId(String productId) {
this.productId = productId;
}
public Long getAmount() {
return amount;
}
public void setAmount(Long amount) {
this.amount = amount;
}
}

53
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/order/OrderConfig.java Normal file
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package com.baeldung.atomikos.spring.jpa.order;
import java.util.Properties;
import javax.persistence.EntityManagerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import com.atomikos.jdbc.AtomikosDataSourceBean;
@Configuration
@EnableJpaRepositories(basePackages = "com.baeldung.atomikos.spring.jpa.order", entityManagerFactoryRef = "orderEntityManager", transactionManagerRef = "transactionManager")
public class OrderConfig {
@Bean(initMethod = "init", destroyMethod = "close")
public AtomikosDataSourceBean orderDataSource() {
AtomikosDataSourceBean dataSource = new AtomikosDataSourceBean();
dataSource.setLocalTransactionMode(true);
dataSource.setUniqueResourceName("db2");
dataSource.setXaDataSourceClassName("org.apache.derby.jdbc.EmbeddedXADataSource");
Properties xaProperties = new Properties();
xaProperties.put("databaseName", "db2");
xaProperties.put("createDatabase", "create");
dataSource.setXaProperties(xaProperties);
dataSource.setPoolSize(10);
return dataSource;
}
@Bean
public EntityManagerFactory orderEntityManager() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.baeldung.atomikos.spring.jpa.order");
factory.setDataSource(orderDataSource());
Properties jpaProperties = new Properties();
//jpaProperties.put("hibernate.show_sql", "true");
//jpaProperties.put("hibernate.format_sql", "true");
jpaProperties.put("hibernate.dialect", "org.hibernate.dialect.DerbyDialect");
jpaProperties.put("hibernate.current_session_context_class", "jta");
jpaProperties.put("javax.persistence.transactionType", "jta");
jpaProperties.put("hibernate.transaction.manager_lookup_class", "com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup");
jpaProperties.put("hibernate.hbm2ddl.auto", "create-drop");
factory.setJpaProperties(jpaProperties);
factory.afterPropertiesSet();
return factory.getObject();
}
}

9
atomikos/src/main/java/com/baeldung/atomikos/spring/jpa/order/OrderRepository.java Normal file
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package com.baeldung.atomikos.spring.jpa.order;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface OrderRepository extends JpaRepository<Order, String> {
}

0
java-collections-maps/src/main/resources/logback.xml → atomikos/src/main/resources/logback.xml
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10
atomikos/src/main/resources/schema.sql Normal file
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CREATE TABLE INVENTORY (
productId VARCHAR PRIMARY KEY,
balance INT
);
CREATE TABLE ORDERS (
orderId VARCHAR PRIMARY KEY,
productId VARCHAR,
amount INT NOT NULL CHECK (amount <= 5)
);

1
atomikos/src/main/resources/transactions.properties Normal file
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com.atomikos.icatch.file=logs

118
atomikos/src/test/java/com/baeldung/atomikos/direct/ApplicationUnitTest.java Normal file
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package com.baeldung.atomikos.direct;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.UUID;
import javax.sql.DataSource;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import com.atomikos.icatch.jta.UserTransactionImp;
import com.atomikos.jdbc.AtomikosDataSourceBean;
public class ApplicationUnitTest {
private static DataSource inventoryDataSource;
private static DataSource orderDataSource;
private static String productId = UUID.randomUUID()
.toString();
@Test
@Ignore
public void testPlaceOrderSuccess() throws Exception {
int amount = 1;
long initialBalance = getBalance(inventoryDataSource, productId);
Application application = new Application(inventoryDataSource, orderDataSource);
application.placeOrder(productId, amount);
long finalBalance = getBalance(inventoryDataSource, productId);
assertEquals(initialBalance - amount, finalBalance);
}
@Test
@Ignore
public void testPlaceOrderFailure() throws Exception {
int amount = 10;
long initialBalance = getBalance(inventoryDataSource, productId);
Application application = new Application(inventoryDataSource, orderDataSource);
application.placeOrder(productId, amount);
long finalBalance = getBalance(inventoryDataSource, productId);
assertEquals(initialBalance, finalBalance);
}
@BeforeClass
public static void setUp() throws SQLException {
inventoryDataSource = getDataSource("db1");
orderDataSource = getDataSource("db2");
Connection inventoryConnection = inventoryDataSource.getConnection();
Connection orderConnection = orderDataSource.getConnection();
String createInventoryTable = "create table Inventory ( " + " productId VARCHAR ( 100 ) PRIMARY KEY, balance INT )";
String createInventoryRow = "insert into Inventory values ( '" + productId + "', 10000 )";
Statement s1 = inventoryConnection.createStatement();
try {
s1.executeUpdate(createInventoryTable);
} catch (Exception e) {
System.out.println("Inventory table exists");
}
try {
s1.executeUpdate(createInventoryRow);
} catch (Exception e) {
System.out.println("Product row exists");
}
s1.close();
String createOrderTable = "create table Orders ( orderId VARCHAR ( 100 ) PRIMARY KEY, productId VARCHAR ( 100 ), amount INT NOT NULL CHECK (amount <= 5) )";
Statement s2 = orderConnection.createStatement();
try {
s2.executeUpdate(createOrderTable);
} catch (Exception e) {
System.out.println("Orders table exists");
}
s2.close();
inventoryConnection.close();
orderConnection.close();
}
private static DataSource getDataSource(String db) {
DataSource ds;
AtomikosDataSourceBean ads = new AtomikosDataSourceBean();
ads.setXaDataSourceClassName("org.apache.derby.jdbc.EmbeddedXADataSource");
Properties properties = new Properties();
properties.put("databaseName", db);
properties.put("createDatabase", "create");
ads.setXaProperties(properties);
ads.setUniqueResourceName(db);
ads.setPoolSize(10); // optional
ads.setBorrowConnectionTimeout(10); // optional
ds = ads;
return ds;
}
private static long getBalance(DataSource inventoryDataSource, String productId) throws Exception {
UserTransactionImp utx = new UserTransactionImp();
utx.begin();
Connection inventoryConnection = inventoryDataSource.getConnection();
Statement s1 = inventoryConnection.createStatement();
String q1 = "select balance from Inventory where productId='" + productId + "'";
ResultSet rs1 = s1.executeQuery(q1);
if (rs1 == null || !rs1.next())
throw new Exception("Product not found: " + productId);
long balance = rs1.getLong(1);
inventoryConnection.close();
utx.commit();
return balance;
}
}

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atomikos/src/test/java/com/baeldung/atomikos/spring/ApplicationUnitTest.java Normal file
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package com.baeldung.atomikos.spring;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.UUID;
import javax.sql.DataSource;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.baeldung.atomikos.spring.config.Config;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { Config.class })
public class ApplicationUnitTest {
private static String productId = UUID.randomUUID()
.toString();
@Autowired
Application application;
@Autowired
DataSource inventoryDataSource;
@Autowired
DataSource orderDataSource;
@Test
@Ignore
public void testPlaceOrderSuccess() throws Exception {
int amount = 1;
long initialBalance = getBalance(inventoryDataSource, productId);
application.placeOrder(productId, amount);
long finalBalance = getBalance(inventoryDataSource, productId);
assertEquals(initialBalance - amount, finalBalance);
}
@Test
@Ignore
public void testPlaceOrderFailure() throws Exception {
int amount = 10;
long initialBalance = getBalance(inventoryDataSource, productId);
try {
application.placeOrder(productId, amount);
} catch (Exception e) {
System.out.println(e.getMessage());
}
long finalBalance = getBalance(inventoryDataSource, productId);
assertEquals(initialBalance, finalBalance);
}
@Before
public void setUp() throws SQLException {
Connection inventoryConnection = inventoryDataSource.getConnection();
Connection orderConnection = orderDataSource.getConnection();
String createInventoryTable = "create table Inventory ( " + " productId VARCHAR ( 100 ) PRIMARY KEY, balance INT )";
String createInventoryRow = "insert into Inventory values ( '" + productId + "', 10000 )";
Statement s1 = inventoryConnection.createStatement();
try {
s1.executeUpdate(createInventoryTable);
} catch (Exception e) {
System.out.println("Inventory table exists");
}
try {
s1.executeUpdate(createInventoryRow);
} catch (Exception e) {
System.out.println("Product row exists");
}
s1.close();
String createOrderTable = "create table Orders ( orderId VARCHAR ( 100 ) PRIMARY KEY, productId VARCHAR ( 100 ), amount INT NOT NULL CHECK (amount <= 5) )";
Statement s2 = orderConnection.createStatement();
try {
s2.executeUpdate(createOrderTable);
} catch (Exception e) {
System.out.println("Orders table exists");
}
s2.close();
inventoryConnection.close();
orderConnection.close();
}
private static long getBalance(DataSource inventoryDataSource, String productId) throws Exception {
Connection inventoryConnection = inventoryDataSource.getConnection();
Statement s1 = inventoryConnection.createStatement();
String q1 = "select balance from Inventory where productId='" + productId + "'";
ResultSet rs1 = s1.executeQuery(q1);
if (rs1 == null || !rs1.next())
throw new Exception("Product not found: " + productId);
long balance = rs1.getLong(1);
inventoryConnection.close();
return balance;
}
}

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atomikos/src/test/java/com/baeldung/atomikos/spring/jpa/ApplicationUnitTest.java Normal file
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package com.baeldung.atomikos.spring.jpa;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.sql.SQLException;
import java.util.UUID;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.baeldung.atomikos.spring.jpa.config.Config;
import com.baeldung.atomikos.spring.jpa.inventory.Inventory;
import com.baeldung.atomikos.spring.jpa.inventory.InventoryConfig;
import com.baeldung.atomikos.spring.jpa.inventory.InventoryRepository;
import com.baeldung.atomikos.spring.jpa.order.OrderConfig;
import com.baeldung.atomikos.spring.jpa.order.OrderRepository;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { Config.class, InventoryConfig.class, OrderConfig.class })
public class ApplicationUnitTest {
private static String productId = UUID.randomUUID()
.toString();
@Autowired
Application application;
@Autowired
InventoryRepository inventoryRepository;
@Autowired
OrderRepository orderRepository;
@Test
@Ignore
public void testPlaceOrderSuccess() throws Exception {
int amount = 1;
long initialBalance = getBalance(inventoryRepository, productId);
application.placeOrder(productId, amount);
long finalBalance = getBalance(inventoryRepository, productId);
assertEquals(initialBalance - amount, finalBalance);
}
@Test
@Ignore
public void testPlaceOrderFailure() throws Exception {
int amount = 10;
long initialBalance = getBalance(inventoryRepository, productId);
try {
application.placeOrder(productId, amount);
} catch (Exception e) {
System.out.println(e.getMessage());
}
long finalBalance = getBalance(inventoryRepository, productId);
assertEquals(initialBalance, finalBalance);
}
@Before
public void setUp() throws SQLException {
Inventory inventory = new Inventory();
inventory.setProductId(productId);
inventory.setBalance(new Long(10000));
inventoryRepository.save(inventory);
}
private static long getBalance(InventoryRepository inventoryRepository, String productId) throws Exception {
return inventoryRepository.findOne(productId)
.getBalance();
}
}

6
core-java-modules/core-java-lang-oop/src/main/resources/logback.xml → atomikos/src/test/resources/logback.xml
View File

@ -7,12 +7,6 @@
</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>

1
atomikos/src/test/resources/transactions.properties Normal file
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@ -0,0 +1 @@
com.atomikos.icatch.file=logs

56
aws-app-sync/pom.xml Normal file
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@ -0,0 +1,56 @@
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.baeldung</groupId>
<artifactId>aws-app-sync</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>aws-app-sync</name>
<description>Spring Boot using AWS App Sync</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

32
aws-app-sync/src/main/java/com/baeldung/awsappsync/AppSyncClientHelper.java Normal file
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@ -0,0 +1,32 @@
package com.baeldung.awsappsync;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;
import java.nio.charset.StandardCharsets;
import java.util.Map;
public class AppSyncClientHelper {
static String apiUrl = "https://m4i3b6icrrb7livfbypfspiifi.appsync-api.us-east-2.amazonaws.com";
static String apiKey = "da2-bm4rpatkkrc5jfyhvvq7itjeke";
static String API_KEY_HEADER = "x-api-key";
public static WebClient.ResponseSpec getResponseBodySpec(Map<String, Object> requestBody) {
return WebClient
.builder()
.baseUrl(apiUrl)
.defaultHeader(API_KEY_HEADER, apiKey)
.defaultHeader("Content-Type", "application/json")
.build()
.method(HttpMethod.POST)
.uri("/graphql")
.body(BodyInserters.fromValue(requestBody))
.accept(MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML)
.acceptCharset(StandardCharsets.UTF_8)
.retrieve();
}
}

13
aws-app-sync/src/main/java/com/baeldung/awsappsync/AwsAppSyncApplication.java Normal file
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@ -0,0 +1,13 @@
package com.baeldung.awsappsync;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class AwsAppSyncApplication {
public static void main(String[] args) {
SpringApplication.run(AwsAppSyncApplication.class, args);
}
}

72
aws-app-sync/src/test/java/com/baeldung/awsappsync/AwsAppSyncApplicationTests.java Normal file
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@ -0,0 +1,72 @@
package com.baeldung.awsappsync;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.web.reactive.function.client.WebClient;
import java.util.HashMap;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.*;
@SpringBootTest
class AwsAppSyncApplicationTests {
@Test
void givenGraphQuery_whenListEvents_thenReturnAllEvents() {
Map<String, Object> requestBody = new HashMap<>();
requestBody.put("query", "query ListEvents {"
+ " listEvents {"
+ " items {"
+ " id"
+ " name"
+ " where"
+ " when"
+ " description"
+ " }"
+ " }"
+ "}");
requestBody.put("variables", "");
requestBody.put("operationName", "ListEvents");
String bodyString = AppSyncClientHelper.getResponseBodySpec(requestBody)
.bodyToMono(String.class).block();
assertNotNull(bodyString);
assertTrue(bodyString.contains("My First Event"));
assertTrue(bodyString.contains("where"));
assertTrue(bodyString.contains("when"));
}
@Test
void givenGraphAdd_whenMutation_thenReturnIdNameDesc() {
String queryString = "mutation add {"
+ " createEvent("
+ " name:\"My added GraphQL event\""
+ " where:\"Day 2\""
+ " when:\"Saturday night\""
+ " description:\"Studying GraphQL\""
+ " ){"
+ " id"
+ " name"
+ " description"
+ " }"
+ "}";
Map<String, Object> requestBody = new HashMap<>();
requestBody.put("query", queryString);
requestBody.put("variables", "");
requestBody.put("operationName", "add");
WebClient.ResponseSpec response = AppSyncClientHelper.getResponseBodySpec(requestBody);
String bodyString = response.bodyToMono(String.class).block();
assertNotNull(bodyString);
assertTrue(bodyString.contains("My added GraphQL event"));
assertFalse(bodyString.contains("where"));
assertFalse(bodyString.contains("when"));
}
}

3
bazel/bazelapp/README.md
View File

@ -1,3 +0,0 @@
### Relevant Articles:
- [Building Java Applications with Bazel](https://www.baeldung.com/bazel-build-tool)

15
cas/README.md
View File

@ -1,7 +1,18 @@
## CAS
This module contains articles about the Central Authentication Service (CAS)
This module contains articles about the Central Authentication Service (CAS).
The module consists of 2 submodules:
1. `cas-server` - it requires JDK11 and uses the Gradle War Overlay style to ease setup and deployment. To start the server, simply run:
`./gradlew run
-Dorg.gradle.java.home=$JAVA11_HOME
-Pargs="-Dcas.standalone.configurationDirectory=/cas-server/src/main/resources/etc/cas/config"`
The server starts at https://localhost:8443. `casuser`/`Mellon` are the username and password for logging in.
2. `cas-secured-app` - A Maven based Springboot Application
### Relevant Articles:
- [CAS SSO With Spring Security](baeldung.com/spring-security-cas-sso)
- [CAS SSO With Spring Security](https://www.baeldung.com/spring-security-cas-sso)

146
cas/cas-server/README.md
View File

@ -1,146 +0,0 @@
CAS Overlay Template [![Build Status](https://travis-ci.org/apereo/cas-overlay-template.svg?branch=master)](https://travis-ci.org/apereo/cas-overlay-template)
=======================
Generic CAS WAR overlay to exercise the latest versions of CAS. This overlay could be freely used as a starting template for local CAS war overlays.
# Versions
- CAS `6.1.x`
- JDK `11`
# Overview
To build the project, use:
```bash
# Use --refresh-dependencies to force-update SNAPSHOT versions
./gradlew[.bat] clean build
```
To see what commands are available to the build script, run:
```bash
./gradlew[.bat] tasks
```
To launch into the CAS command-line shell:
```bash
./gradlew[.bat] downloadShell runShell
```
To fetch and overlay a CAS resource or view, use:
```bash
./gradlew[.bat] getResource -PresourceName=[resource-name]
```
To list all available CAS views and templates:
```bash
./gradlew[.bat] listTemplateViews
```
To unzip and explode the CAS web application file and the internal resources jar:
```bash
./gradlew[.bat] explodeWar
```
# Configuration
- The `etc` directory contains the configuration files and directories that need to be copied to `/etc/cas/config`.
```bash
./gradlew[.bat] copyCasConfiguration
```
- The specifics of the build are controlled using the `gradle.properties` file.
## Adding Modules
CAS modules may be specified under the `dependencies` block of the [Gradle build script](build.gradle):
```gradle
dependencies {
compile "org.apereo.cas:cas-server-some-module:${project.casVersion}"
...
}
```
To collect the list of all project modules and dependencies:
```bash
./gradlew[.bat] allDependencies
```
### Clear Gradle Cache
If you need to, on Linux/Unix systems, you can delete all the existing artifacts (artifacts and metadata) Gradle has downloaded using:
```bash
# Only do this when absolutely necessary
rm -rf $HOME/.gradle/caches/
```
Same strategy applies to Windows too, provided you switch `$HOME` to its equivalent in the above command.
# Deployment
- Create a keystore file `thekeystore` under `/etc/cas`. Use the password `changeit` for both the keystore and the key/certificate entries. This can either be done using the JDK's `keytool` utility or via the following command:
```bash
./gradlew[.bat] createKeystore
```
- Ensure the keystore is loaded up with keys and certificates of the server.
On a successful deployment via the following methods, CAS will be available at:
* `https://cas.server.name:8443/cas`
## Executable WAR
Run the CAS web application as an executable WAR:
```bash
./gradlew[.bat] run
```
Debug the CAS web application as an executable WAR:
```bash
./gradlew[.bat] debug
```
Run the CAS web application as a *standalone* executable WAR:
```bash
./gradlew[.bat] clean executable
```
## External
Deploy the binary web application file `cas.war` after a successful build to a servlet container of choice.
## Docker
The following strategies outline how to build and deploy CAS Docker images.
### Jib
The overlay embraces the [Jib Gradle Plugin](https://github.com/GoogleContainerTools/jib) to provide easy-to-use out-of-the-box tooling for building CAS docker images. Jib is an open-source Java containerizer from Google that lets Java developers build containers using the tools they know. It is a container image builder that handles all the steps of packaging your application into a container image. It does not require you to write a Dockerfile or have Docker installed, and it is directly integrated into the overlay.
```bash
./gradlew build jibDockerBuild
```
### Dockerfile
You can also use the native Docker tooling and the provided `Dockerfile` to build and run CAS.
```bash
chmod +x *.sh
./docker-build.sh
./docker-run.sh
```

0
cas/cas-server/pom.xml
View File

0
cas/pom.xml
View File

40
core-groovy-2/determine-datatype/pom.xml Normal file
View File

@ -0,0 +1,40 @@
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.groovy</groupId>
<artifactId>determine-datatype</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>groovy-maven-plugin</artifactId>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>2.0.6</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.junit/junit5-engine -->
<dependency>
<groupId>org.junit</groupId>
<artifactId>junit5-engine</artifactId>
<version>5.0.0-ALPHA</version>
</dependency>
</dependencies>
</project>

14
core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/Person.groovy Normal file
View File

@ -0,0 +1,14 @@
package com.baeldung.groovy.determine.datatype
class Person {
private int ageAsInt
private Double ageAsDouble
private String ageAsString
Person() {}
Person(int ageAsInt) { this.ageAsInt = ageAsInt}
Person(Double ageAsDouble) { this.ageAsDouble = ageAsDouble}
Person(String ageAsString) { this.ageAsString = ageAsString}
}
class Student extends Person {}

55
core-groovy-2/determine-datatype/src/com/baeldung/groovy/determine/datatype/PersonTest.groovy Normal file
View File

@ -0,0 +1,55 @@
package com.baeldung.groovy.determine.datatype;
import org.junit.Assert
import org.junit.Test;
public class PersonTest {
@Test
public void givenWhenParameterTypeIsInteger_thenReturnTrue() {
Person personObj = new Person(10)
Assert.assertTrue(personObj.ageAsInt instanceof Integer);
}
@Test
public void givenWhenParameterTypeIsDouble_thenReturnTrue() {
Person personObj = new Person(10.0)
Assert.assertTrue((personObj.ageAsDouble).getClass() == Double)
}
@Test
public void givenWhenParameterTypeIsString_thenReturnTrue() {
Person personObj = new Person("10 years")
Assert.assertTrue(personObj.ageAsString.class == String)
}
@Test
public void givenClassName_WhenParameterIsInteger_thenReturnTrue() {
Assert.assertTrue(Person.class.getDeclaredField('ageAsInt').type == int.class)
}
@Test
public void givenWhenObjectIsInstanceOfType_thenReturnTrue() {
Person personObj = new Person()
Assert.assertTrue(personObj instanceof Person)
}
@Test
public void givenWhenInstanceIsOfSubtype_thenReturnTrue() {
Student studentObj = new Student()
Assert.assertTrue(studentObj in Person)
}
@Test
public void givenGroovyList_WhenFindClassName_thenReturnTrue() {
def ageList = ['ageAsString','ageAsDouble', 10]
Assert.assertTrue(ageList.class == ArrayList)
Assert.assertTrue(ageList.getClass() == ArrayList)
}
@Test
public void givenGrooyMap_WhenFindClassName_thenReturnTrue() {
def ageMap = [ageAsString: '10 years', ageAsDouble: 10.0]
Assert.assertFalse(ageMap.class == LinkedHashMap)
}
}

3
core-groovy/README.md
View File

@ -12,4 +12,5 @@ This module contains articles about core Groovy concepts
- [Closures in Groovy](https://www.baeldung.com/groovy-closures)
- [Converting a String to a Date in Groovy](https://www.baeldung.com/groovy-string-to-date)
- [Guide to I/O in Groovy](https://www.baeldung.com/groovy-io)
- [[More -->]](/core-groovy-2)
- [Convert String to Integer in Groovy](https://www.baeldung.com/groovy-convert-string-to-integer)
- [[More -->]](/core-groovy-2)

110
core-groovy/src/test/groovy/com/baeldung/stringtoint/ConvertStringToInt.groovy Normal file
View File

@ -0,0 +1,110 @@
package com.baeldung.stringtoint
import org.junit.Test
import java.text.DecimalFormat
import static org.junit.Assert.assertEquals
import static org.junit.Assert.assertNull
class ConvertStringToInt {
@Test
void givenString_whenUsingAsInteger_thenConvertToInteger() {
def stringNum = "123"
def invalidString = "123a"
Integer expectedInteger = 123
Integer integerNum = stringNum as Integer
def intNum = invalidString?.isInteger() ? invalidString as Integer : null
assertNull(null, intNum)
assertEquals(integerNum, expectedInteger)
}
@Test
void givenString_whenUsingAsInt_thenConvertToInt() {
def stringNum = "123"
int expectedInt = 123
int intNum = stringNum as int
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingToInteger_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
int intNum = stringNum.toInteger()
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingParseInt_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
int intNum = Integer.parseInt(stringNum)
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingValueOf_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
int intNum = Integer.valueOf(stringNum)
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingIntValue_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
int intNum = new Integer(stringNum).intValue()
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingNewInteger_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
int intNum = new Integer(stringNum)
assertEquals(intNum, expectedInt)
}
@Test
void givenString_whenUsingDecimalFormat_thenConvertToInteger() {
def stringNum = "123"
int expectedInt = 123
DecimalFormat decimalFormat = new DecimalFormat("#")
int intNum = decimalFormat.parse(stringNum).intValue()
assertEquals(intNum, expectedInt)
}
@Test(expected = NumberFormatException.class)
void givenInvalidString_whenUsingAs_thenThrowNumberFormatException() {
def invalidString = "123a"
invalidString as Integer
}
@Test(expected = NullPointerException.class)
void givenNullString_whenUsingToInteger_thenThrowNullPointerException() {
def invalidString = null
invalidString.toInteger()
}
@Test
void givenString_whenUsingIsInteger_thenCheckIfCorrectValue() {
def invalidString = "123a"
def validString = "123"
def invalidNum = invalidString?.isInteger() ? invalidString as Integer : false
def correctNum = validString?.isInteger() ? validString as Integer : false
assertEquals(false, invalidNum)
assertEquals(123, correctNum)
}
}

1
core-java-modules/core-java-14/README.md
View File

@ -7,3 +7,4 @@ This module contains articles about Java 14.
- [Guide to the @Serial Annotation in Java 14](https://www.baeldung.com/java-14-serial-annotation)
- [Java Text Blocks](https://www.baeldung.com/java-text-blocks)
- [Pattern Matching for instanceof in Java 14](https://www.baeldung.com/java-pattern-matching-instanceof)
- [Helpful NullPointerExceptions in Java 14](https://www.baeldung.com/java-14-nullpointerexception)

56
core-java-modules/core-java-14/src/main/java/com/baeldung/java14/npe/HelpfulNullPointerException.java Normal file
View File

@ -0,0 +1,56 @@
package com.baeldung.java14.npe;
public class HelpfulNullPointerException {
public static void main(String[] args) {
Employee employee = null;
employee.getName();
}
public String getEmployeeEmailAddress(Employee employee) {
String emailAddress = employee.getPersonalDetails().getEmailAddress().toLowerCase();
return emailAddress;
}
static class Employee {
String name;
PersonalDetails personalDetails;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public PersonalDetails getPersonalDetails() {
return personalDetails;
}
public void setPersonalDetails(PersonalDetails personalDetails) {
this.personalDetails = personalDetails;
}
}
static class PersonalDetails {
String emailAddress;
String phone;
public String getEmailAddress() {
return emailAddress;
}
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
}

22
core-java-modules/core-java-14/src/main/java/com/baeldung/java14/record/Person.java Normal file
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@ -0,0 +1,22 @@
package com.baeldung.java14.record;
import java.util.Objects;
public record Person (String name, String address) {
public static String UNKWOWN_ADDRESS = "Unknown";
public static String UNNAMED = "Unnamed";
public Person {
Objects.requireNonNull(name);
Objects.requireNonNull(address);
}
public Person(String name) {
this(name, UNKWOWN_ADDRESS);
}
public static Person unnamed(String address) {
return new Person(UNNAMED, address);
}
}

84
core-java-modules/core-java-14/src/test/java/com/baeldung/java14/foreign/api/ForeignMemoryUnitTest.java Normal file
View File

@ -0,0 +1,84 @@
package com.baeldung.java14.foreign.api;
import jdk.incubator.foreign.*;
import org.junit.Test;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import java.lang.invoke.VarHandle;
import java.nio.ByteOrder;
public class ForeignMemoryUnitTest {
@Test
public void whenAValueIsSet_thenAccessTheValue() {
long value = 10;
MemoryAddress memoryAddress =
MemorySegment.allocateNative(8).baseAddress();
VarHandle varHandle = MemoryHandles.varHandle(long.class,
ByteOrder.nativeOrder());
varHandle.set(memoryAddress, value);
assertThat(varHandle.get(memoryAddress), is(value));
}
@Test
public void whenMultipleValuesAreSet_thenAccessAll() {
VarHandle varHandle = MemoryHandles.varHandle(int.class,
ByteOrder.nativeOrder());
try(MemorySegment memorySegment =
MemorySegment.allocateNative(100)) {
MemoryAddress base = memorySegment.baseAddress();
for(int i=0; i<25; i++) {
varHandle.set(base.addOffset((i*4)), i);
}
for(int i=0; i<25; i++) {
assertThat(varHandle.get(base.addOffset((i*4))), is(i));
}
}
}
@Test
public void whenSetValuesWithMemoryLayout_thenTheyCanBeRetrieved() {
SequenceLayout sequenceLayout =
MemoryLayout.ofSequence(25,
MemoryLayout.ofValueBits(64, ByteOrder.nativeOrder()));
VarHandle varHandle =
sequenceLayout.varHandle(long.class,
MemoryLayout.PathElement.sequenceElement());
try(MemorySegment memorySegment =
MemorySegment.allocateNative(sequenceLayout)) {
MemoryAddress base = memorySegment.baseAddress();
for(long i=0; i<sequenceLayout.elementCount().getAsLong(); i++) {
varHandle.set(base, i, i);
}
for(long i=0; i<sequenceLayout.elementCount().getAsLong(); i++) {
assertThat(varHandle.get(base, i), is(i));
}
}
}
@Test
public void whenSlicingMemorySegment_thenTheyCanBeAccessedIndividually() {
MemoryAddress memoryAddress =
MemorySegment.allocateNative(12).baseAddress();
MemoryAddress memoryAddress1 =
memoryAddress.segment().asSlice(0,4).baseAddress();
MemoryAddress memoryAddress2 =
memoryAddress.segment().asSlice(4,4).baseAddress();
MemoryAddress memoryAddress3 =
memoryAddress.segment().asSlice(8,4).baseAddress();
VarHandle intHandle =
MemoryHandles.varHandle(int.class, ByteOrder.nativeOrder());
intHandle.set(memoryAddress1, Integer.MIN_VALUE);
intHandle.set(memoryAddress2, 0);
intHandle.set(memoryAddress3, Integer.MAX_VALUE);
assertThat(intHandle.get(memoryAddress1), is(Integer.MIN_VALUE));
assertThat(intHandle.get(memoryAddress2), is(0));
assertThat(intHandle.get(memoryAddress3), is(Integer.MAX_VALUE));
}
}

37
core-java-modules/core-java-14/src/test/java/com/baeldung/java14/npe/HelpfulNullPointerExceptionUnitTest.java Normal file
View File

@ -0,0 +1,37 @@
package com.baeldung.java14.npe;
import org.junit.Test;
import static com.baeldung.java14.helpfulnullpointerexceptions.HelpfulNullPointerException.Employee;
import static com.baeldung.java14.helpfulnullpointerexceptions.HelpfulNullPointerException.PersonalDetails;
import static org.assertj.core.api.Assertions.assertThat;
public class HelpfulNullPointerExceptionUnitTest {
@Test (expected = NullPointerException.class)
public void givenAnEmptyPersonalDetails_whenEmailAddressIsAccessed_thenThrowNPE() {
var helpfulNPE = new HelpfulNullPointerException();
var employee = new Employee();
employee.setName("Eduard");
employee.setPersonalDetails(new PersonalDetails());
helpfulNPE.getEmployeeEmailAddress(employee);
}
@Test
public void givenCompletePersonalDetails_whenEmailAddressIsAccessed_thenSuccess() {
var helpfulNPE = new HelpfulNullPointerException();
var emailAddress = "eduard@gmx.com";
var employee = new Employee();
employee.setName("Eduard");
var personalDetails = new PersonalDetails();
personalDetails.setEmailAddress(emailAddress.toUpperCase());
personalDetails.setPhone("1234");
employee.setPersonalDetails(personalDetails);
assertThat(helpfulNPE.getEmployeeEmailAddress(employee)).isEqualTo(emailAddress);
}
}

150
core-java-modules/core-java-14/src/test/java/com/baeldung/java14/record/PersonTest.java Normal file
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@ -0,0 +1,150 @@
package com.baeldung.java14.record;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class PersonTest {
@Test
public void givenSameNameAndAddress_whenEquals_thenPersonsEqual() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person1 = new Person(name, address);
Person person2 = new Person(name, address);
assertTrue(person1.equals(person2));
}
@Test
public void givenDifferentObject_whenEquals_thenNotEqual() {
Person person = new Person("John Doe", "100 Linda Ln.");
assertFalse(person.equals(new Object()));
}
@Test
public void givenDifferentName_whenEquals_thenPersonsNotEqual() {
String address = "100 Linda Ln.";
Person person1 = new Person("Jane Doe", address);
Person person2 = new Person("John Doe", address);
assertFalse(person1.equals(person2));
}
@Test
public void givenDifferentAddress_whenEquals_thenPersonsNotEqual() {
String name = "John Doe";
Person person1 = new Person(name, "100 Linda Ln.");
Person person2 = new Person(name, "200 London Ave.");
assertFalse(person1.equals(person2));
}
@Test
public void givenSameNameAndAddress_whenHashCode_thenPersonsEqual() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person1 = new Person(name, address);
Person person2 = new Person(name, address);
assertEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenDifferentObject_whenHashCode_thenNotEqual() {
Person person = new Person("John Doe", "100 Linda Ln.");
assertNotEquals(person.hashCode(), new Object().hashCode());
}
@Test
public void givenDifferentName_whenHashCode_thenPersonsNotEqual() {
String address = "100 Linda Ln.";
Person person1 = new Person("Jane Doe", address);
Person person2 = new Person("John Doe", address);
assertNotEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenDifferentAddress_whenHashCode_thenPersonsNotEqual() {
String name = "John Doe";
Person person1 = new Person(name, "100 Linda Ln.");
Person person2 = new Person(name, "200 London Ave.");
assertNotEquals(person1.hashCode(), person2.hashCode());
}
@Test
public void givenValidNameAndAddress_whenGetNameAndAddress_thenExpectedValuesReturned() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person = new Person(name, address);
assertEquals(name, person.name());
assertEquals(address, person.address());
}
@Test
public void givenValidNameAndAddress_whenToString_thenCorrectStringReturned() {
String name = "John Doe";
String address = "100 Linda Ln.";
Person person = new Person(name, address);
assertEquals("Person[name=" + name + ", address=" + address + "]", person.toString());
}
@Test(expected = NullPointerException.class)
public void givenNullName_whenConstruct_thenErrorThrown() {
new Person(null, "100 Linda Ln.");
}
@Test(expected = NullPointerException.class)
public void givenNullAddress_whenConstruct_thenErrorThrown() {
new Person("John Doe", null);
}
@Test
public void givenUnknownAddress_whenConstructing_thenAddressPopulated() {
String name = "John Doe";
Person person = new Person(name);
assertEquals(name, person.name());
assertEquals(Person.UNKWOWN_ADDRESS, person.address());
}
@Test
public void givenUnnamed_whenConstructingThroughFactory_thenNamePopulated() {
String address = "100 Linda Ln.";
Person person = Person.unnamed(address);
assertEquals(Person.UNNAMED, person.name());
assertEquals(address, person.address());
}
}

1
core-java-modules/core-java-8-2/README.md
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@ -4,7 +4,6 @@ This module contains articles about Java 8 core features
### Relevant Articles:
- [How to Delay Code Execution in Java](https://www.baeldung.com/java-delay-code-execution)
- [Run a Java Application from the Command Line](https://www.baeldung.com/java-run-jar-with-arguments)
- [Java 8 Stream skip() vs limit()](https://www.baeldung.com/java-stream-skip-vs-limit)
- [Guide to Java BiFunction Interface](https://www.baeldung.com/java-bifunction-interface)

5
core-java-modules/core-java-8-datetime-2/README.md Normal file
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@ -0,0 +1,5 @@
### Relevant Articles:
- [Generating Random Dates in Java](https://www.baeldung.com/java-random-dates)
- [Creating a LocalDate with Values in Java](https://www.baeldung.com/java-creating-localdate-with-values)
- [[<-- Prev]](/core-java-modules/core-java-datetime-java8-1)

8
core-java-modules/core-java-datetime-java8/pom.xml → core-java-modules/core-java-8-datetime-2/pom.xml
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@ -4,9 +4,9 @@
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>
<artifactId>core-java-datetime-java8</artifactId>
<artifactId>core-java-8-datetime</artifactId>
<version>${project.parent.version}</version>
<name>core-java-datetime-java8</name>
<name>core-java-8-datetime</name>
<packaging>jar</packaging>
<parent>
@ -64,8 +64,8 @@
</build>
<properties>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<joda-time.version>2.10</joda-time.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>

0
core-java-modules/core-java-datetime-java8-2/src/main/java/com/baeldung/localdate/LocalDateExample.java → core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/localdate/LocalDateExample.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/random/LegacyRandomDateTimes.java → core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/random/LegacyRandomDateTimes.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/random/RandomDateTimes.java → core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/random/RandomDateTimes.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/random/RandomDates.java → core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/random/RandomDates.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/random/RandomTimes.java → core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/random/RandomTimes.java
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12
core-java-modules/core-java-datetime-java8-2/src/test/java/com/baeldung/localdate/LocalDateExampleUnitTest.java → core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/localdate/LocalDateExampleUnitTest.java
View File

@ -11,31 +11,31 @@ public class LocalDateExampleUnitTest {
@Test
public void givenValues_whenUsingOfMethod_thenLocalDate() {
assertEquals("2020-01-08", date.getCustomDateOne(2020, 1, 8));
assertEquals("2020-01-08", date.getCustomDateOne(2020, 1, 8).toString());
}
@Test
public void givenValuesWithMonthEnum_whenUsingOfMethod_thenLocalDate() {
assertEquals("2020-01-08", date.getCustomDateTwo(2020, Month.JANUARY, 8));
assertEquals("2020-01-08", date.getCustomDateTwo(2020, Month.JANUARY, 8).toString());
}
@Test
public void givenValues_whenUsingEpochDay_thenLocalDate() {
assertEquals("2020-01-08", date.getDateFromEpochDay(18269));
assertEquals("2020-01-08", date.getDateFromEpochDay(18269).toString());
}
@Test
public void givenValues_whenUsingYearDay_thenLocalDate() {
assertEquals("2020-01-08", date.getDateFromYearAndDayOfYear(2020, 8));
assertEquals("2020-01-08", date.getDateFromYearAndDayOfYear(2020, 8).toString());
}
@Test
public void givenValues_whenUsingParse_thenLocalDate() {
assertEquals("2020-01-08", date.getDateFromString("2020-01-08"));
assertEquals("2020-01-08", date.getDateFromString("2020-01-08").toString());
}
@Test
public void givenValuesWithFormatter_whenUsingParse_thenLocalDate() {
assertEquals("2020-01-08", date.getDateFromStringAndFormatter("8-Jan-2020", "d-MMM-yyyy"));
assertEquals("2020-01-08", date.getDateFromStringAndFormatter("8-Jan-2020", "d-MMM-yyyy").toString());
}
}

0
core-java-modules/core-java-datetime-java8/src/test/java/com/baeldung/random/LegacyRandomDateTimesUnitTest.java → core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/random/LegacyRandomDateTimesUnitTest.java
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0
core-java-modules/core-java-datetime-java8/src/test/java/com/baeldung/random/RandomDateTimesUnitTest.java → core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/random/RandomDateTimesUnitTest.java
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0
core-java-modules/core-java-datetime-java8/src/test/java/com/baeldung/random/RandomDatesUnitTest.java → core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/random/RandomDatesUnitTest.java
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0
core-java-modules/core-java-datetime-java8/src/test/java/com/baeldung/random/RandomTimesUnitTest.java → core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/random/RandomTimesUnitTest.java
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2
core-java-modules/core-java-datetime-java8/README.md → core-java-modules/core-java-8-datetime/README.md
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@ -13,4 +13,4 @@ This module contains articles about the Date and Time API introduced with Java 8
- [How to Get the Start and the End of a Day using Java](http://www.baeldung.com/java-day-start-end)
- [Set the Time Zone of a Date in Java](https://www.baeldung.com/java-set-date-time-zone)
- [Comparing Dates in Java](https://www.baeldung.com/java-comparing-dates)
- [Generating Random Dates in Java](https://www.baeldung.com/java-random-dates)
- [[Next -->]](/core-java-modules/core-java-datetime-java8-2)

8
core-java-modules/core-java-datetime-java8-2/pom.xml → core-java-modules/core-java-8-datetime/pom.xml
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@ -4,9 +4,9 @@
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>
<artifactId>core-java-datetime-java8</artifactId>
<artifactId>core-java-8-datetime</artifactId>
<version>${project.parent.version}</version>
<name>core-java-datetime-java8</name>
<name>core-java-8-datetime</name>
<packaging>jar</packaging>
<parent>
@ -64,8 +64,8 @@
</build>
<properties>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<joda-time.version>2.10</joda-time.version>
<!-- testing -->
<assertj.version>3.6.1</assertj.version>

0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/date/comparison/DateTimeComparisonUtils.java → core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/date/comparison/DateTimeComparisonUtils.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/date/comparison/LegacyDateComparisonUtils.java → core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/date/comparison/LegacyDateComparisonUtils.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/datetime/UseDateTimeFormatter.java → core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/UseDateTimeFormatter.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/datetime/UseDuration.java → core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/UseDuration.java
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0
core-java-modules/core-java-datetime-java8/src/main/java/com/baeldung/datetime/UseLocalDate.java → core-java-modules/core-java-8-datetime/src/main/java/com/baeldung/datetime/UseLocalDate.java
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