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

.gitignore

@@ -62,3 +62,5 @@ jmeter/src/main/resources/*-JMeter.csv
 **/dist
 **/tmp
 **/out-tsc
+**/nbproject/
+**/nb-configuration.xml

JGit/pom.xml

@@ -3,10 +3,11 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
-    <artifactId>JGitSnippets</artifactId>
+    <artifactId>JGit</artifactId>
     <version>1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <url>http://maven.apache.org</url>
+	<name>JGit</name>
 
     <parent>
         <groupId>com.baeldung</groupId>

README.md

@@ -2,41 +2,27 @@
 The "REST with Spring" Classes
 ==============================
 
-After 5 months of work, here's the Master Class of REST With Spring: <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)
+Building a single module
+====================
+To build a specific module run the command: `mvn clean install -Dgib.enabled=false` in the module directory

Twitter4J/pom.xml

@@ -1,13 +1,9 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
-    <groupId>com.mabsisa</groupId>
     <artifactId>Twitter4J</artifactId>
     <packaging>jar</packaging>
-    <version>1.0-SNAPSHOT</version>
     <name>Twitter4J</name>
-    <url>http://maven.apache.org</url>
 
     <parent>
         <groupId>com.baeldung</groupId>
@@ -23,27 +19,6 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <finalName>${project.artifactId}</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-            </resource>
-        </resources>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <excludes>
-                        <exclude>**/ApplicationTest.java</exclude>
-                    </excludes>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
     <properties>
         <twitter4j-stream.version>4.0.6</twitter4j-stream.version>
     </properties>

activejdbc/pom.xml

@@ -1,7 +1,6 @@
 <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>activejdbc</artifactId>
     <version>1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
@@ -79,55 +78,11 @@
                     </dependency>
                 </dependencies>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <reportFormat>brief</reportFormat>
-                    <trimStackTrace>true</trimStackTrace>
-                    <useFile>false</useFile>
-                    <includes>
-                        <include>**/*Spec*.java</include>
-                        <include>**/*Test*.java</include>
-                    </includes>
-                    <excludes>
-                        <exclude>**/helpers/*</exclude>
-                        <exclude>**/*$*</exclude>
-                    </excludes>
-                </configuration>
-            </plugin>
         </plugins>
     </build>
 
-    <repositories>
-        <repository>
-            <id>snapshots1</id>
-            <name>JavaLite Snapshots1</name>
-            <url>http://repo.javalite.io/</url>
-            <snapshots>
-                <enabled>true</enabled>
-                <updatePolicy>always</updatePolicy>
-                <checksumPolicy>warn</checksumPolicy>
-            </snapshots>
-        </repository>
-    </repositories>
-
-    <pluginRepositories>
-        <pluginRepository>
-            <id>snapshots2</id>
-            <name>JavaLite Snapshots2</name>
-            <url>http://repo.javalite.io/</url>
-            <snapshots>
-                <enabled>true</enabled>
-                <updatePolicy>always</updatePolicy>
-                <checksumPolicy>warn</checksumPolicy>
-            </snapshots>
-        </pluginRepository>
-    </pluginRepositories>
-
     <properties>
-        <activejdbc.version>1.4.13</activejdbc.version>
+        <activejdbc.version>2.0</activejdbc.version>
         <environments>development.test,development</environments>
         <mysql.connector.version>5.1.34</mysql.connector.version>
     </properties>

activejdbc/src/main/java/com/baeldung/model/Employee.java

@@ -16,4 +16,8 @@ public class Employee extends Model {
         set("created_by",createdBy);
     }
 
+    public String getLastName() {
+        return getString("last_name");
+    }
+
 }

activejdbc/src/main/java/com/baeldung/model/Role.java

@@ -15,4 +15,8 @@ public class Role extends Model {
         set("role_name",role);
         set("created_by",createdBy);
     }
+
+    public String getRoleName() {
+        return getString("role_name");
+    }
 }

activejdbc/src/test/java/com/baeldung/ActiveJDBCAppManualTest.java

@@ -7,7 +7,7 @@ import org.junit.Test;
 
 import java.util.List;
 
-public class ActiveJDBCAppTest extends DBSpec
+public class ActiveJDBCAppManualTest extends DBSpec
 {
     @Test
     public void ifEmployeeCreated_thenIsValid() {

algorithms/README.md

@@ -24,3 +24,10 @@
 - [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
 - [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
 - [An Introduction to the Theory of Big-O Notation](http://www.baeldung.com/big-o-notation)
+- [Check If Two Rectangles Overlap In Java](https://www.baeldung.com/java-check-if-two-rectangles-overlap)
+- [Calculate the Distance Between Two Points in Java](https://www.baeldung.com/java-distance-between-two-points)
+- [Find the Intersection of Two Lines in Java](https://www.baeldung.com/java-intersection-of-two-lines)
+- [Check If a String Contains All The Letters of The Alphabet](https://www.baeldung.com/java-string-contains-all-letters)
+- [Round Up to the Nearest Hundred](https://www.baeldung.com/java-round-up-nearest-hundred)
+- [Merge Sort in Java](https://www.baeldung.com/java-merge-sort)
+- [Calculate Percentage in Java](https://www.baeldung.com/java-calculate-percentage)

algorithms/pom.xml

@@ -17,6 +17,11 @@
             <artifactId>commons-math3</artifactId>
             <version>${commons-math3.version}</version>
         </dependency>
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>${commons-codec.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -85,6 +90,7 @@
         <io.jenetics.version>3.7.0</io.jenetics.version>
         <org.jgrapht.core.version>1.0.1</org.jgrapht.core.version>
         <org.assertj.core.version>3.9.0</org.assertj.core.version>
+        <commons-codec.version>1.11</commons-codec.version>
     </properties>
 
 </project>

algorithms/roundUpToHundred/.gitignore

@@ -0,0 +1 @@
+/bin/

algorithms/roundUpToHundred/src/com/java/src/RoundUpToHundred.java

@@ -0,0 +1,20 @@
+package com.java.src;
+
+import java.util.Scanner;
+
+public class RoundUpToHundred {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        double input = scanner.nextDouble();
+        scanner.close();
+
+        RoundUpToHundred.round(input);
+    }
+
+    static long round(double input) {
+        long i = (long) Math.ceil(input);
+        return ((i + 99) / 100) * 100;
+    };
+
+}

algorithms/roundUpToHundred/src/com/java/src/RoundUpToHundredTest.java

@@ -0,0 +1,14 @@
+package com.java.src;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class RoundUpToHundredTest {
+    @Test
+    public void givenInput_whenRound_thenRoundUpToTheNearestHundred() {
+        assertEquals("Rounded up to hundred", 100, RoundUpToHundred.round(99));
+        assertEquals("Rounded up to three hundred ", 300, RoundUpToHundred.round(200.2));
+        assertEquals("Returns same rounded value", 400, RoundUpToHundred.round(400));
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/conversion/HexStringConverter.java

@@ -0,0 +1,110 @@
+package com.baeldung.algorithms.conversion;
+
+import java.math.BigInteger;
+
+import javax.xml.bind.DatatypeConverter;
+
+import org.apache.commons.codec.DecoderException;
+import org.apache.commons.codec.binary.Hex;
+
+import com.google.common.io.BaseEncoding;
+
+public class HexStringConverter {
+
+    /**
+     * Create a byte Array from String of hexadecimal digits using Character conversion 
+     * @param hexString - Hexadecimal digits as String
+     * @return Desired byte Array
+     */
+    public byte[] decodeHexString(String hexString) {
+        if (hexString.length() % 2 == 1) {
+            throw new IllegalArgumentException("Invalid hexadecimal String supplied.");
+        }
+        byte[] bytes = new byte[hexString.length() / 2];
+
+        for (int i = 0; i < hexString.length(); i += 2) {
+            bytes[i / 2] = hexToByte(hexString.substring(i, i + 2));
+        }
+        return bytes;
+    }
+
+    /**
+     * Create a String of hexadecimal digits from a byte Array using Character conversion
+     * @param byteArray - The byte Array
+     * @return Desired String of hexadecimal digits in lower case
+     */
+    public String encodeHexString(byte[] byteArray) {
+        StringBuffer hexStringBuffer = new StringBuffer();
+        for (int i = 0; i < byteArray.length; i++) {
+            hexStringBuffer.append(byteToHex(byteArray[i]));
+        }
+        return hexStringBuffer.toString();
+    }
+
+    public String byteToHex(byte num) {
+        char[] hexDigits = new char[2];
+        hexDigits[0] = Character.forDigit((num >> 4) & 0xF, 16);
+        hexDigits[1] = Character.forDigit((num & 0xF), 16);
+        return new String(hexDigits);
+    }
+
+    public byte hexToByte(String hexString) {
+        int firstDigit = toDigit(hexString.charAt(0));
+        int secondDigit = toDigit(hexString.charAt(1));
+        return (byte) ((firstDigit << 4) + secondDigit);
+    }
+
+    private int toDigit(char hexChar) {
+        int digit = Character.digit(hexChar, 16);
+        if(digit == -1) {
+            throw new IllegalArgumentException("Invalid Hexadecimal Character: "+ hexChar);
+        }
+        return digit;
+    }
+
+    public String encodeUsingBigIntegerToString(byte[] bytes) {
+        BigInteger bigInteger = new BigInteger(1, bytes);
+        return bigInteger.toString(16);
+    }
+
+    public String encodeUsingBigIntegerStringFormat(byte[] bytes) {
+        BigInteger bigInteger = new BigInteger(1, bytes);
+        return String.format("%0" + (bytes.length << 1) + "x", bigInteger);
+    }
+
+    public byte[] decodeUsingBigInteger(String hexString) {
+        byte[] byteArray = new BigInteger(hexString, 16).toByteArray();
+        if (byteArray[0] == 0) {
+            byte[] output = new byte[byteArray.length - 1];
+            System.arraycopy(byteArray, 1, output, 0, output.length);
+            return output;
+        }
+        return byteArray;
+    }
+
+    public String encodeUsingDataTypeConverter(byte[] bytes) {
+        return DatatypeConverter.printHexBinary(bytes);
+    }
+
+    public byte[] decodeUsingDataTypeConverter(String hexString) {
+        return DatatypeConverter.parseHexBinary(hexString);
+    }
+
+    public String encodeUsingApacheCommons(byte[] bytes) throws DecoderException {
+        return Hex.encodeHexString(bytes);
+    }
+
+    public byte[] decodeUsingApacheCommons(String hexString) throws DecoderException {
+        return Hex.decodeHex(hexString);
+    }
+
+    public String encodeUsingGuava(byte[] bytes) {
+        return BaseEncoding.base16()
+            .encode(bytes);
+    }
+
+    public byte[] decodeUsingGuava(String hexString) {
+        return BaseEncoding.base16()
+            .decode(hexString.toUpperCase());
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/distancebetweenpoints/DistanceBetweenPointsService.java

@@ -0,0 +1,38 @@
+package com.baeldung.algorithms.distancebetweenpoints;
+
+import java.awt.geom.Point2D;
+
+public class DistanceBetweenPointsService {
+
+    public double calculateDistanceBetweenPoints(
+        double x1, 
+        double y1, 
+        double x2, 
+        double y2) {
+        
+        return Math.sqrt((y2 - y1) * (y2 - y1) + (x2 - x1) * (x2 - x1));
+    }
+
+    public double calculateDistanceBetweenPointsWithHypot(
+        double x1, 
+        double y1, 
+        double x2, 
+        double y2) {
+        
+        double ac = Math.abs(y2 - y1);
+        double cb = Math.abs(x2 - x1);
+        
+        return Math.hypot(ac, cb);
+    }
+
+    public double calculateDistanceBetweenPointsWithPoint2D( 
+        double x1, 
+        double y1, 
+        double x2, 
+        double y2) {
+        
+        return Point2D.distance(x1, y1, x2, y2);
+
+    }
+
+}

algorithms/src/main/java/com/baeldung/algorithms/insertionsort/InsertionSort.java

@@ -0,0 +1,41 @@
+package com.baeldung.algorithms.insertionsort;
+
+public class InsertionSort {
+
+    public static void insertionSortImperative(int[] input) {
+        for (int i = 1; i < input.length; i++) {
+            int key = input[i];
+            int j = i - 1;
+            while (j >= 0 && input[j] > key) {
+                input[j + 1] = input[j];
+                j = j - 1;
+            }
+            input[j + 1] = key;
+        }
+    }
+
+    public static void insertionSortRecursive(int[] input) {
+        insertionSortRecursive(input, input.length);
+    }
+
+    private static void insertionSortRecursive(int[] input, int i) {
+        // base case
+        if (i <= 1) {
+            return;
+        }
+
+        // sort the first i - 1 elements of the array
+        insertionSortRecursive(input, i - 1);
+
+        // then find the correct position of the element at position i
+        int key = input[i - 1];
+        int j = i - 2;
+        // shifting the elements from their position by 1
+        while (j >= 0 && input[j] > key) {
+            input[j + 1] = input[j];
+            j = j - 1;
+        }
+        // inserting the key at the appropriate position
+        input[j + 1] = key;
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/kthlargest/FindKthLargest.java

@@ -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);
     }

algorithms/src/main/java/com/baeldung/algorithms/linesintersection/LinesIntersectionService.java

@@ -0,0 +1,21 @@
+package com.baeldung.algorithms.linesintersection;
+
+import java.awt.Point;
+import java.util.Optional;
+
+public class LinesIntersectionService {
+
+    public Optional<Point> calculateIntersectionPoint(double m1, double b1, double m2, double b2) {
+
+        if (m1 == m2) {
+            return Optional.empty();
+        }
+
+        double x = (b2 - b1) / (m1 - m2);
+        double y = m1 * x + b1;
+
+        Point point = new Point();
+        point.setLocation(x, y);
+        return Optional.of(point);
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/mcts/montecarlo/State.java

@@ -87,7 +87,7 @@ public class State {
     void randomPlay() {
         List<Position> availablePositions = this.board.getEmptyPositions();
         int totalPossibilities = availablePositions.size();
-        int selectRandom = (int) (Math.random() * ((totalPossibilities - 1) + 1));
+        int selectRandom = (int) (Math.random() * totalPossibilities);
         this.board.performMove(this.playerNo, availablePositions.get(selectRandom));
     }
 

algorithms/src/main/java/com/baeldung/algorithms/mcts/tree/Node.java

@@ -65,7 +65,7 @@ public class Node {
 
     public Node getRandomChildNode() {
         int noOfPossibleMoves = this.childArray.size();
-        int selectRandom = (int) (Math.random() * ((noOfPossibleMoves - 1) + 1));
+        int selectRandom = (int) (Math.random() * noOfPossibleMoves);
         return this.childArray.get(selectRandom);
     }
 

algorithms/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java

@@ -0,0 +1,50 @@
+package com.baeldung.algorithms.mergesort;
+
+public class MergeSort {
+
+    public static void main(String[] args) {
+        int[] a = { 5, 1, 6, 2, 3, 4 };
+        mergeSort(a, a.length);
+        for (int i = 0; i < a.length; i++)
+            System.out.println(a[i]);
+    }
+
+    public static void mergeSort(int[] a, int n) {
+        if (n < 2)
+            return;
+        int mid = n / 2;
+        int[] l = new int[mid];
+        int[] r = new int[n - mid];
+
+        for (int i = 0; i < mid; i++) {
+            l[i] = a[i];
+        }
+        for (int i = mid; i < n; i++) {
+            r[i - mid] = a[i];
+        }
+        mergeSort(l, mid);
+        mergeSort(r, n - mid);
+
+        merge(a, l, r, mid, n - mid);
+    }
+
+    public static void merge(int[] a, int[] l, int[] r, int left, int right) {
+
+        int i = 0, j = 0, k = 0;
+
+        while (i < left && j < right) {
+
+            if (l[i] < r[j])
+                a[k++] = l[i++];
+            else
+                a[k++] = r[j++];
+
+        }
+
+        while (i < left)
+            a[k++] = l[i++];
+
+        while (j < right)
+            a[k++] = r[j++];
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/quicksort/QuickSort.java

@@ -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;
+    }
+
+}

algorithms/src/main/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSort.java

@@ -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);
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/rectanglesoverlap/Point.java

@@ -0,0 +1,29 @@
+package com.baeldung.algorithms.rectanglesoverlap;
+
+public class Point {
+
+    private int x;
+    private int y;
+
+    public Point(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public void setX(int x) {
+        this.x = x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    public void setY(int y) {
+        this.y = y;
+    }
+
+}

algorithms/src/main/java/com/baeldung/algorithms/rectanglesoverlap/Rectangle.java

@@ -0,0 +1,40 @@
+package com.baeldung.algorithms.rectanglesoverlap;
+
+public class Rectangle {
+
+    private Point bottomLeft;
+    private Point topRight;
+
+    public Rectangle(Point bottomLeft, Point topRight) {
+        this.bottomLeft = bottomLeft;
+        this.topRight = topRight;
+    }
+
+    public Point getBottomLeft() {
+        return bottomLeft;
+    }
+
+    public void setBottomLeft(Point bottomLeft) {
+        this.bottomLeft = bottomLeft;
+    }
+
+    public Point getTopRight() {
+        return topRight;
+    }
+
+    public void setTopRight(Point topRight) {
+        this.topRight = topRight;
+    }
+
+    public boolean isOverlapping(Rectangle other) {
+        // one rectangle is to the top of the other
+        if (this.topRight.getY() < other.bottomLeft.getY() || this.bottomLeft.getY() > other.topRight.getY()) {
+            return false;
+        }
+        // one rectangle is to the left of the other
+        if (this.topRight.getX() < other.bottomLeft.getX() || this.bottomLeft.getX() > other.topRight.getX()) {
+            return false;
+        }
+        return true;
+    }
+}

algorithms/src/main/java/com/baeldung/algorithms/string/EnglishAlphabetLetters.java

@@ -0,0 +1,35 @@
+package com.baeldung.algorithms.string;
+
+public class EnglishAlphabetLetters {
+
+    public static boolean checkStringForAllTheLetters(String input) {
+        boolean[] visited = new boolean[26];
+
+        int index = 0;
+
+        for (int id = 0; id < input.length(); id++) {
+            if ('a' <= input.charAt(id) && input.charAt(id) <= 'z') {
+                index = input.charAt(id) - 'a';
+            } else if ('A' <= input.charAt(id) && input.charAt(id) <= 'Z') {
+                index = input.charAt(id) - 'A';
+            }
+            visited[index] = true;
+        }
+
+        for (int id = 0; id < 26; id++) {
+            if (!visited[id]) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean checkStringForAllLetterUsingStream(String input) {
+        long c = input.toLowerCase().chars().filter(ch -> ch >= 'a' && ch <= 'z').distinct().count();
+        return c == 26;
+    }
+
+    public static void main(String[] args) {
+        checkStringForAllLetterUsingStream("intit");
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/AntColonyOptimizationLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import org.junit.Assert;
 import org.junit.Test;

algorithms/src/test/java/com/baeldung/algorithms/BinaryGeneticAlgorithmLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import org.junit.Assert;
 import org.junit.Test;

algorithms/src/test/java/com/baeldung/algorithms/DijkstraAlgorithmLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import org.junit.Test;
 

algorithms/src/test/java/com/baeldung/algorithms/HillClimbingAlgorithmUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import com.baeldung.algorithms.hillclimbing.HillClimbing;
 import com.baeldung.algorithms.hillclimbing.State;

algorithms/src/test/java/com/baeldung/algorithms/MiddleElementLookupUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import com.baeldung.algorithms.middleelementlookup.MiddleElementLookup;
 import com.baeldung.algorithms.middleelementlookup.Node;

algorithms/src/test/java/com/baeldung/algorithms/RtFiniteStateMachineLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import com.baeldung.algorithms.automata.*;
 import org.junit.Test;

algorithms/src/test/java/com/baeldung/algorithms/SimulatedAnnealingLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 import org.junit.Assert;
 import org.junit.Test;

algorithms/src/test/java/com/baeldung/algorithms/StringSearchAlgorithmsUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms;
+package com.baeldung.algorithms;
 
 
 import org.junit.Assert;

algorithms/src/test/java/com/baeldung/algorithms/binarysearch/BinarySearchUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms.binarysearch;
+package com.baeldung.algorithms.binarysearch;
 
 import java.util.Arrays;
 import java.util.List;

algorithms/src/test/java/com/baeldung/algorithms/conversion/ByteArrayConverterUnitTest.java

@@ -0,0 +1,127 @@
+package com.baeldung.algorithms.conversion;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+import org.apache.commons.codec.DecoderException;
+import org.hamcrest.text.IsEqualIgnoringCase;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.algorithms.conversion.HexStringConverter;
+
+public class ByteArrayConverterUnitTest {
+
+    private HexStringConverter hexStringConverter;
+
+    @Before
+    public void setup() {
+        hexStringConverter = new HexStringConverter();
+    }
+
+    @Test
+    public void shouldEncodeByteArrayToHexStringUsingBigIntegerToString() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        if(hexString.charAt(0) == '0') {
+            hexString = hexString.substring(1);
+        }
+        String output = hexStringConverter.encodeUsingBigIntegerToString(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldEncodeByteArrayToHexStringUsingBigIntegerStringFormat() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        String output = hexStringConverter.encodeUsingBigIntegerStringFormat(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldDecodeHexStringToByteArrayUsingBigInteger() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        byte[] output = hexStringConverter.decodeUsingBigInteger(hexString);
+        assertArrayEquals(bytes, output);
+    }
+    
+    @Test
+    public void shouldEncodeByteArrayToHexStringUsingCharacterConversion() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        String output = hexStringConverter.encodeHexString(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldDecodeHexStringToByteArrayUsingCharacterConversion() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        byte[] output = hexStringConverter.decodeHexString(hexString);
+        assertArrayEquals(bytes, output);
+    }
+    
+    @Test(expected=IllegalArgumentException.class)
+    public void shouldDecodeHexToByteWithInvalidHexCharacter() {
+        hexStringConverter.hexToByte("fg");
+    }
+
+    @Test
+    public void shouldEncodeByteArrayToHexStringDataTypeConverter() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        String output = hexStringConverter.encodeUsingDataTypeConverter(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldDecodeHexStringToByteArrayUsingDataTypeConverter() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        byte[] output = hexStringConverter.decodeUsingDataTypeConverter(hexString);
+        assertArrayEquals(bytes, output);
+    }
+
+    @Test
+    public void shouldEncodeByteArrayToHexStringUsingGuava() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        String output = hexStringConverter.encodeUsingGuava(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldDecodeHexStringToByteArrayUsingGuava() {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        byte[] output = hexStringConverter.decodeUsingGuava(hexString);
+        assertArrayEquals(bytes, output);
+    }
+
+    @Test
+    public void shouldEncodeByteArrayToHexStringUsingApacheCommons() throws DecoderException {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        String output = hexStringConverter.encodeUsingApacheCommons(bytes);
+        assertThat(output, IsEqualIgnoringCase.equalToIgnoringCase(hexString));
+    }
+
+    @Test
+    public void shouldDecodeHexStringToByteArrayUsingApacheCommons() throws DecoderException {
+        byte[] bytes = getSampleBytes();
+        String hexString = getSampleHexString();
+        byte[] output = hexStringConverter.decodeUsingApacheCommons(hexString);
+        assertArrayEquals(bytes, output);
+    }
+
+    private String getSampleHexString() {
+        return "0af50c0e2d10";
+    }
+
+    private byte[] getSampleBytes() {
+        return new byte[] { 10, -11, 12, 14, 45, 16 };
+    }
+
+}

algorithms/src/test/java/com/baeldung/algorithms/distancebetweenpoints/DistanceBetweenPointsServiceUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.algorithms.distancebetweenpoints;
+
+import org.junit.Test;
+
+import com.baeldung.algorithms.distancebetweenpoints.DistanceBetweenPointsService;
+
+import static org.junit.Assert.assertEquals;
+
+public class DistanceBetweenPointsServiceUnitTest {
+
+    private DistanceBetweenPointsService service = new DistanceBetweenPointsService();
+
+    @Test
+    public void givenTwoPoints_whenCalculateDistanceByFormula_thenCorrect() {
+
+        double x1 = 3;
+        double y1 = 4;
+        double x2 = 7;
+        double y2 = 1;
+
+        double distance = service.calculateDistanceBetweenPoints(x1, y1, x2, y2);
+
+        assertEquals(distance, 5, 0.001);
+
+    }
+
+    @Test
+    public void givenTwoPoints_whenCalculateDistanceWithHypot_thenCorrect() {
+
+        double x1 = 3;
+        double y1 = 4;
+        double x2 = 7;
+        double y2 = 1;
+
+        double distance = service.calculateDistanceBetweenPointsWithHypot(x1, y1, x2, y2);
+
+        assertEquals(distance, 5, 0.001);
+
+    }
+
+    @Test
+    public void givenTwoPoints_whenCalculateDistanceWithPoint2D_thenCorrect() {
+
+        double x1 = 3;
+        double y1 = 4;
+        double x2 = 7;
+        double y2 = 1;
+
+        double distance = service.calculateDistanceBetweenPointsWithPoint2D(x1, y1, x2, y2);
+
+        assertEquals(distance, 5, 0.001);
+
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/insertionsort/InsertionSortUnitTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.algorithms.insertionsort;
+
+import com.baeldung.algorithms.insertionsort.InsertionSort;
+import org.junit.Test;
+
+import static org.junit.Assert.assertArrayEquals;
+
+public class InsertionSortUnitTest {
+
+    @Test
+    public void givenUnsortedArray_whenInsertionSortImperative_thenSortedAsc() {
+        int[] input = {6, 2, 3, 4, 5, 1};
+        InsertionSort.insertionSortImperative(input);
+        int[] expected = {1, 2, 3, 4, 5, 6};
+        assertArrayEquals("the two arrays are not equal", expected, input);
+    }
+
+    @Test
+    public void givenUnsortedArray_whenInsertionSortRecursive_thenSortedAsc() {
+        int[] input = {6, 4, 5, 2, 3, 1};
+        InsertionSort.insertionSortRecursive(input);
+        int[] expected = {1, 2, 3, 4, 5, 6};
+        assertArrayEquals("the two arrays are not equal", expected, input);
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/linesintersection/LinesIntersectionServiceUnitTest.java

@@ -0,0 +1,40 @@
+package com.baeldung.algorithms.linesintersection;
+
+import java.awt.Point;
+import java.util.Optional;
+
+import org.junit.Test;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertEquals;
+
+public class LinesIntersectionServiceUnitTest {
+    private LinesIntersectionService service = new LinesIntersectionService();
+
+    @Test
+    public void givenNotParallelLines_whenCalculatePoint_thenPresent() {
+
+        double m1 = 0;
+        double b1 = 0;
+        double m2 = 1;
+        double b2 = -1;
+
+        Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);
+
+        assertTrue(point.isPresent());
+        assertEquals(point.get().getX(), 1, 0.001);
+        assertEquals(point.get().getY(), 0, 0.001);
+    }
+
+    @Test
+    public void givenParallelLines_whenCalculatePoint_thenEmpty() {
+        double m1 = 1;
+        double b1 = 0;
+        double m2 = 1;
+        double b2 = -1;
+
+        Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);
+
+        assertFalse(point.isPresent());
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/mcts/MCTSUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms.mcts;
+package com.baeldung.algorithms.mcts;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;

algorithms/src/test/java/com/baeldung/algorithms/mergesort/MergeSortUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.algorithms.mergesort;
+
+import org.junit.Assert;
+
+import org.junit.Test;
+
+public class MergeSortUnitTest {
+
+    @Test
+    public void positiveTest() {
+        int[] actual = { 5, 1, 6, 2, 3, 4 };
+        int[] expected = { 1, 2, 3, 4, 5, 6 };
+        MergeSort.mergeSort(actual, actual.length);
+        Assert.assertArrayEquals(expected, actual);
+    }
+
+}

algorithms/src/test/java/com/baeldung/algorithms/minimax/MinimaxUnitTest.java

@@ -1,4 +1,4 @@
-package algorithms.minimax;
+package com.baeldung.algorithms.minimax;
 
 import org.junit.Before;
 import org.junit.Test;

algorithms/src/test/java/com/baeldung/algorithms/quicksort/QuickSortUnitTest.java

@@ -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);
+    }
+
+}

algorithms/src/test/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSortUnitTest.java

@@ -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);
+    }
+}

algorithms/src/test/java/com/baeldung/algorithms/rectanglesoverlap/RectangleUnitTest.java

@@ -0,0 +1,42 @@
+package com.baeldung.algorithms.rectanglesoverlap;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
+import org.junit.Test;
+
+import com.baeldung.algorithms.rectanglesoverlap.Point;
+import com.baeldung.algorithms.rectanglesoverlap.Rectangle;
+
+public class RectangleUnitTest {
+
+    @Test
+    public void givenTwoOverlappingRectangles_whenisOverlappingCalled_shouldReturnTrue() {
+        Rectangle rectangle1 = new Rectangle(new Point(2, 1), new Point(4, 3));
+        Rectangle rectangle2 = new Rectangle(new Point(1, 1), new Point(6, 4));
+        assertTrue(rectangle1.isOverlapping(rectangle2));
+
+        rectangle1 = new Rectangle(new Point(-5, -2), new Point(2, 3));
+        rectangle2 = new Rectangle(new Point(-2, -1), new Point(5, 2));
+        assertTrue(rectangle1.isOverlapping(rectangle2));
+
+        rectangle1 = new Rectangle(new Point(-5, 1), new Point(2, 4));
+        rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, 5));
+        assertTrue(rectangle1.isOverlapping(rectangle2));
+    }
+
+    @Test
+    public void givenTwoNonOverlappingRectangles_whenisOverlappingCalled_shouldReturnFalse() {
+        Rectangle rectangle1 = new Rectangle(new Point(-5, 1), new Point(-3, 4));
+        Rectangle rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, 5));
+        assertFalse(rectangle1.isOverlapping(rectangle2));
+
+        rectangle1 = new Rectangle(new Point(-5, 1), new Point(3, 4));
+        rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, -1));
+        assertFalse(rectangle1.isOverlapping(rectangle2));
+
+        rectangle1 = new Rectangle(new Point(-2, 1), new Point(0, 3));
+        rectangle2 = new Rectangle(new Point(3, 1), new Point(5, 4));
+        assertFalse(rectangle1.isOverlapping(rectangle2));
+    }
+
+}

algorithms/src/test/java/com/baeldung/algorithms/string/EnglishAlphabetLettersUnitTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.algorithms.string;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class EnglishAlphabetLettersUnitTest {
+
+    @Test
+    void givenString_whenContainsAllCharacter_thenTrue() {
+        String input = "Farmer jack realized that big yellow quilts were expensive";
+        Assertions.assertTrue(EnglishAlphabetLetters.checkStringForAllTheLetters(input));
+    }
+
+    @Test
+    void givenString_whenContainsAllCharacter_thenUsingStreamExpectTrue() {
+        String input = "Farmer jack realized that big yellow quilts were expensive";
+        Assertions.assertTrue(EnglishAlphabetLetters.checkStringForAllLetterUsingStream(input));
+    }
+
+}

animal-sniffer-mvn-plugin/src/test/java/com/baeldung/AppUnitTest.java

@@ -7,7 +7,7 @@ import junit.framework.TestSuite;
 /**
  * Unit test for simple App.
  */
-public class AppTest 
+public class AppUnitTest 
     extends TestCase
 {
     /**
@@ -15,7 +15,7 @@ public class AppTest
      *
      * @param testName name of the test case
      */
-    public AppTest( String testName )
+    public AppUnitTest( String testName )
     {
         super( testName );
     }
@@ -25,7 +25,7 @@ public class AppTest
      */
     public static Test suite()
     {
-        return new TestSuite( AppTest.class );
+        return new TestSuite( AppUnitTest.class );
     }
 
     /**

apache-avro/pom.xml

@@ -4,8 +4,9 @@
          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-avro-tutorial</artifactId>
+    <artifactId>apache-avro</artifactId>
     <version>0.0.1-SNAPSHOT</version>
+	<name>Apache Avro</name>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

apache-avro/src/main/java/com/baeldung/avro/util/serealization/AvroDeSerealizer.java

@@ -5,29 +5,37 @@ import org.apache.avro.io.DatumReader;
 import org.apache.avro.io.Decoder;
 import org.apache.avro.io.DecoderFactory;
 import org.apache.avro.specific.SpecificDatumReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 
 public class AvroDeSerealizer {
 
-public AvroHttpRequest deSerealizeAvroHttpRequestJSON(byte[] data){
-    DatumReader<AvroHttpRequest> reader = new SpecificDatumReader<>(AvroHttpRequest.class);
-    Decoder decoder = null;
-    try {
-        decoder = DecoderFactory.get().jsonDecoder(AvroHttpRequest.getClassSchema(), new String(data));
-        return reader.read(null, decoder);
-    } catch (IOException e) {
-        return null;
-    }
-}
+    private static Logger logger = LoggerFactory.getLogger(AvroDeSerealizer.class);
 
-public AvroHttpRequest deSerealizeAvroHttpRequestBinary(byte[] data){
-    DatumReader<AvroHttpRequest> employeeReader = new SpecificDatumReader<>(AvroHttpRequest.class);
-    Decoder decoder = DecoderFactory.get().binaryDecoder(data, null);
-    try {
-        return employeeReader.read(null, decoder);
-    } catch (IOException e) {
+    public AvroHttpRequest deSerealizeAvroHttpRequestJSON(byte[] data) {
+        DatumReader<AvroHttpRequest> reader = new SpecificDatumReader<>(AvroHttpRequest.class);
+        Decoder decoder = null;
+        try {
+            decoder = DecoderFactory.get()
+                .jsonDecoder(AvroHttpRequest.getClassSchema(), new String(data));
+            return reader.read(null, decoder);
+        } catch (IOException e) {
+            logger.error("Deserialization error" + e.getMessage());
+        }
+        return null;
+    }
+
+    public AvroHttpRequest deSerealizeAvroHttpRequestBinary(byte[] data) {
+        DatumReader<AvroHttpRequest> employeeReader = new SpecificDatumReader<>(AvroHttpRequest.class);
+        Decoder decoder = DecoderFactory.get()
+            .binaryDecoder(data, null);
+        try {
+            return employeeReader.read(null, decoder);
+        } catch (IOException e) {
+            logger.error("Deserialization error" + e.getMessage());
+        }
         return null;
     }
 }
-}

apache-avro/src/main/java/com/baeldung/avro/util/serealization/AvroSerealizer.java

@@ -3,42 +3,48 @@ package com.baeldung.avro.util.serealization;
 import com.baeldung.avro.util.model.AvroHttpRequest;
 import org.apache.avro.io.*;
 import org.apache.avro.specific.SpecificDatumWriter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
 public class AvroSerealizer {
 
-public byte[] serealizeAvroHttpRequestJSON(AvroHttpRequest request){
-    DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
-    byte[] data = new byte[0];
-    ByteArrayOutputStream stream = new ByteArrayOutputStream();
-    Encoder jsonEncoder = null;
-    try {
-        jsonEncoder = EncoderFactory.get().jsonEncoder(AvroHttpRequest.getClassSchema(), stream);
-        writer.write(request, jsonEncoder);
-        jsonEncoder.flush();
-        data = stream.toByteArray();
-    } catch (IOException e) {
-        data =null;
-    }
-    return data;
-}
+    private static final Logger logger = LoggerFactory.getLogger(AvroSerealizer.class);
 
-public byte[] serealizeAvroHttpRequestBinary(AvroHttpRequest request){
-    DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
-    byte[] data = new byte[0];
-    ByteArrayOutputStream stream = new ByteArrayOutputStream();
-    Encoder jsonEncoder = EncoderFactory.get().binaryEncoder(stream,null);
-    try {
-        writer.write(request, jsonEncoder);
-        jsonEncoder.flush();
-        data = stream.toByteArray();
-    } catch (IOException e) {
-        data = null;
+    public byte[] serealizeAvroHttpRequestJSON(AvroHttpRequest request) {
+        DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
+        byte[] data = new byte[0];
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        Encoder jsonEncoder = null;
+        try {
+            jsonEncoder = EncoderFactory.get()
+                .jsonEncoder(AvroHttpRequest.getClassSchema(), stream);
+            writer.write(request, jsonEncoder);
+            jsonEncoder.flush();
+            data = stream.toByteArray();
+        } catch (IOException e) {
+            logger.error("Serialization error " + e.getMessage());
+        }
+        return data;
     }
 
-    return data;
-}
+    public byte[] serealizeAvroHttpRequestBinary(AvroHttpRequest request) {
+        DatumWriter<AvroHttpRequest> writer = new SpecificDatumWriter<>(AvroHttpRequest.class);
+        byte[] data = new byte[0];
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        Encoder jsonEncoder = EncoderFactory.get()
+            .binaryEncoder(stream, null);
+        try {
+            writer.write(request, jsonEncoder);
+            jsonEncoder.flush();
+            data = stream.toByteArray();
+        } catch (IOException e) {
+            logger.error("Serialization error " + e.getMessage());
+        }
+
+        return data;
+    }
 
 }

apache-avro/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerTest.java

@@ -1,75 +0,0 @@
-package com.baeldung.avro.util.serealization;
-
-import com.baeldung.avro.util.model.Active;
-import com.baeldung.avro.util.model.AvroHttpRequest;
-import com.baeldung.avro.util.model.ClientIdentifier;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Objects;
-
-import static org.junit.Assert.*;
-
-public class AvroSerealizerDeSerealizerTest {
-
-    AvroSerealizer serealizer;
-    AvroDeSerealizer deSerealizer;
-    AvroHttpRequest request;
-
-    @Before
-    public void setUp() throws Exception {
-        serealizer = new AvroSerealizer();
-        deSerealizer = new AvroDeSerealizer();
-
-        ClientIdentifier clientIdentifier = ClientIdentifier.newBuilder().
-                setHostName("localhost").setIpAddress("255.255.255.0").build();
-
-        List<CharSequence> employees = new ArrayList();
-        employees.add("James");
-        employees.add("Alice");
-        employees.add("David");
-        employees.add("Han");
-
-        request = AvroHttpRequest.newBuilder().setRequestTime(01l)
-                .setActive(Active.YES).setClientIdentifier(clientIdentifier)
-                .setEmployeeNames(employees).build();
-    }
-
-    @After
-    public void tearDown() throws Exception {
-    }
-
-@Test
-public void WhenSerialized_UsingJSONEncoder_ObjectGetsSerialized(){
-    byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
-    assertTrue(Objects.nonNull(data));
-    assertTrue(data.length > 0);
-}
-
-@Test
-public void WhenSerialized_UsingBinaryEncoder_ObjectGetsSerialized(){
-    byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
-    assertTrue(Objects.nonNull(data));
-    assertTrue(data.length > 0);
-}
-
-@Test
-public void WhenDeserialize_UsingJSONDecoder_ActualAndExpectedObjectsAreEqual(){
-    byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
-    AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestJSON(data);
-    assertEquals(actualRequest,request);
-    assertTrue(actualRequest.getRequestTime().equals(request.getRequestTime()));
-}
-
-@Test
-public void WhenDeserialize_UsingBinaryecoder_ActualAndExpectedObjectsAreEqual(){
-    byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
-    AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestBinary(data);
-    assertEquals(actualRequest,request);
-    assertTrue(actualRequest.getRequestTime().equals(request.getRequestTime()));
-}
-}
-

apache-avro/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerUnitTest.java

@@ -0,0 +1,83 @@
+package com.baeldung.avro.util.serealization;
+
+import com.baeldung.avro.util.model.Active;
+import com.baeldung.avro.util.model.AvroHttpRequest;
+import com.baeldung.avro.util.model.ClientIdentifier;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import static org.junit.Assert.*;
+
+public class AvroSerealizerDeSerealizerUnitTest {
+
+    AvroSerealizer serealizer;
+    AvroDeSerealizer deSerealizer;
+    AvroHttpRequest request;
+
+    @Before
+    public void setUp() throws Exception {
+        serealizer = new AvroSerealizer();
+        deSerealizer = new AvroDeSerealizer();
+
+        ClientIdentifier clientIdentifier = ClientIdentifier.newBuilder()
+            .setHostName("localhost")
+            .setIpAddress("255.255.255.0")
+            .build();
+
+        List<CharSequence> employees = new ArrayList();
+        employees.add("James");
+        employees.add("Alice");
+        employees.add("David");
+        employees.add("Han");
+
+        request = AvroHttpRequest.newBuilder()
+            .setRequestTime(01l)
+            .setActive(Active.YES)
+            .setClientIdentifier(clientIdentifier)
+            .setEmployeeNames(employees)
+            .build();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+    }
+
+    @Test
+    public void WhenSerializedUsingJSONEncoder_thenObjectGetsSerialized() {
+        byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
+        assertTrue(Objects.nonNull(data));
+        assertTrue(data.length > 0);
+    }
+
+    @Test
+    public void WhenSerializedUsingBinaryEncoder_thenObjectGetsSerialized() {
+        byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
+        assertTrue(Objects.nonNull(data));
+        assertTrue(data.length > 0);
+    }
+
+    @Test
+    public void WhenDeserializeUsingJSONDecoder_thenActualAndExpectedObjectsAreEqual() {
+        byte[] data = serealizer.serealizeAvroHttpRequestJSON(request);
+        AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestJSON(data);
+        assertEquals(actualRequest, request);
+        assertTrue(actualRequest.getRequestTime()
+            .equals(request.getRequestTime()));
+    }
+
+    @Test
+    public void WhenDeserializeUsingBinaryecoder_thenActualAndExpectedObjectsAreEqual() {
+        byte[] data = serealizer.serealizeAvroHttpRequestBinary(request);
+        AvroHttpRequest actualRequest = deSerealizer.deSerealizeAvroHttpRequestBinary(data);
+        assertEquals(actualRequest, request);
+        assertTrue(actualRequest.getRequestTime()
+            .equals(request.getRequestTime()));
+    }
+    
+}
+

apache-cxf/README.md

@@ -3,3 +3,4 @@
 - [Apache CXF Support for RESTful Web Services](http://www.baeldung.com/apache-cxf-rest-api)
 - [A Guide to Apache CXF with Spring](http://www.baeldung.com/apache-cxf-with-spring)
 - [Introduction to Apache CXF](http://www.baeldung.com/introduction-to-apache-cxf)
+- [Server-Sent Events (SSE) In JAX-RS](https://www.baeldung.com/java-ee-jax-rs-sse)

apache-cxf/pom.xml

@@ -1,5 +1,5 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         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-cxf</artifactId>
@@ -17,6 +17,7 @@
         <module>cxf-spring</module>
         <module>cxf-jaxrs-implementation</module>
         <module>cxf-aegis</module>
+        <module>sse-jaxrs</module>
     </modules>
 
     <build>

apache-cxf/sse-jaxrs/pom.xml

@@ -0,0 +1,21 @@
+<?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>
+
+    <artifactId>sse-jaxrs</artifactId>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>apache-cxf</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <modules>
+        <module>sse-jaxrs-server</module>
+        <module>sse-jaxrs-client</module>
+   </modules>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-client/pom.xml

@@ -0,0 +1,62 @@
+<?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>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>sse-jaxrs</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>sse-jaxrs-client</artifactId>
+
+    <properties>
+        <cxf-version>3.2.0</cxf-version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.6.0</version>
+                <executions>
+                    <execution>
+                        <id>singleEvent</id>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                        <configuration>
+                            <mainClass>com.baeldung.sse.jaxrs.client.SseClientApp</mainClass>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>broadcast</id>
+                        <goals>
+                            <goal>java</goal>
+                        </goals>
+                        <configuration>
+                            <mainClass>com.baeldung.sse.jaxrs.client.SseClientBroadcastApp</mainClass>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.cxf</groupId>
+            <artifactId>cxf-rt-rs-client</artifactId>
+            <version>${cxf-version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.cxf</groupId>
+            <artifactId>cxf-rt-rs-sse</artifactId>
+            <version>${cxf-version}</version>
+        </dependency>
+    </dependencies>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientApp.java

@@ -0,0 +1,48 @@
+package com.baeldung.sse.jaxrs.client;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.sse.InboundSseEvent;
+import javax.ws.rs.sse.SseEventSource;
+import java.util.function.Consumer;
+
+public class SseClientApp {
+
+    private static final String url = "http://127.0.0.1:9080/sse-jaxrs-server/sse/stock/prices";
+
+    public static void main(String... args) throws Exception {
+
+        Client client = ClientBuilder.newClient();
+        WebTarget target = client.target(url);
+        try (SseEventSource eventSource = SseEventSource.target(target).build()) {
+
+            eventSource.register(onEvent, onError, onComplete);
+            eventSource.open();
+
+            //Consuming events for one hour
+            Thread.sleep(60 * 60 * 1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        client.close();
+        System.out.println("End");
+    }
+
+    // A new event is received
+    private static Consumer<InboundSseEvent> onEvent = (inboundSseEvent) -> {
+        String data = inboundSseEvent.readData();
+        System.out.println(data);
+    };
+
+    //Error
+    private static Consumer<Throwable> onError = (throwable) -> {
+        throwable.printStackTrace();
+    };
+
+    //Connection close and there is nothing to receive
+    private static Runnable onComplete = () -> {
+        System.out.println("Done!");
+    };
+
+}

apache-cxf/sse-jaxrs/sse-jaxrs-client/src/main/java/com/baeldung/sse/jaxrs/client/SseClientBroadcastApp.java

@@ -0,0 +1,52 @@
+package com.baeldung.sse.jaxrs.client;
+
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.sse.InboundSseEvent;
+import javax.ws.rs.sse.SseEventSource;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
+
+public class SseClientBroadcastApp {
+
+    private static final String subscribeUrl = "http://localhost:9080/sse-jaxrs-server/sse/stock/subscribe";
+
+
+    public static void main(String... args) throws Exception {
+
+        Client client = ClientBuilder.newClient();
+        WebTarget target = client.target(subscribeUrl);
+        try (final SseEventSource eventSource = SseEventSource.target(target)
+                .reconnectingEvery(5, TimeUnit.SECONDS)
+                .build()) {
+            eventSource.register(onEvent, onError, onComplete);
+            eventSource.open();
+            System.out.println("Wainting for incoming event ...");
+
+            //Consuming events for one hour
+            Thread.sleep(60 * 60 * 1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        client.close();
+        System.out.println("End");
+    }
+
+    // A new event is received
+    private static Consumer<InboundSseEvent> onEvent = (inboundSseEvent) -> {
+        String data = inboundSseEvent.readData();
+        System.out.println(data);
+    };
+
+    //Error
+    private static Consumer<Throwable> onError = (throwable) -> {
+        throwable.printStackTrace();
+    };
+
+    //Connection close and there is nothing to receive
+    private static Runnable onComplete = () -> {
+        System.out.println("Done!");
+    };
+
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/pom.xml

@@ -0,0 +1,85 @@
+<?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>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>sse-jaxrs</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>sse-jaxrs-server</artifactId>
+    <packaging>war</packaging>
+
+    <properties>
+        <liberty-maven-plugin.version>2.4.2</liberty-maven-plugin.version>
+        <failOnMissingWebXml>false</failOnMissingWebXml>
+        <openliberty-version>18.0.0.2</openliberty-version>
+    </properties>
+
+    <build>
+        <finalName>${project.artifactId}</finalName>
+        <plugins>
+            <plugin>
+                <groupId>net.wasdev.wlp.maven.plugins</groupId>
+                <artifactId>liberty-maven-plugin</artifactId>
+                <version>${liberty-maven-plugin.version}</version>
+                <configuration>
+                    <assemblyArtifact>
+                        <groupId>io.openliberty</groupId>
+                        <artifactId>openliberty-webProfile8</artifactId>
+                        <version>${openliberty-version}</version>
+                        <type>zip</type>
+                    </assemblyArtifact>
+                    <installAppPackages>project</installAppPackages>
+                    <looseApplication>true</looseApplication>
+                    <configFile>src/main/liberty/config/server.xml</configFile>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>install-server</id>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>install-server</goal>
+                            <goal>create-server</goal>
+                            <goal>install-feature</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>install-apps</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>install-apps</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>javax.ws.rs</groupId>
+            <artifactId>javax.ws.rs-api</artifactId>
+            <version>2.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.enterprise</groupId>
+            <artifactId>cdi-api</artifactId>
+            <version>2.0</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.json.bind</groupId>
+            <artifactId>javax.json.bind-api</artifactId>
+            <version>1.0</version>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+</project>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/AppConfig.java

@@ -0,0 +1,8 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+@ApplicationPath("sse")
+public class AppConfig extends Application {
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/SseResource.java

@@ -0,0 +1,119 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+import javax.ws.rs.*;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.sse.OutboundSseEvent;
+import javax.ws.rs.sse.Sse;
+import javax.ws.rs.sse.SseBroadcaster;
+import javax.ws.rs.sse.SseEventSink;
+
+@ApplicationScoped
+@Path("stock")
+public class SseResource {
+
+    @Inject
+    private StockService stockService;
+
+    private Sse sse;
+    private SseBroadcaster sseBroadcaster;
+    private OutboundSseEvent.Builder eventBuilder;
+
+    @Context
+    public void setSse(Sse sse) {
+        this.sse = sse;
+        this.eventBuilder = sse.newEventBuilder();
+        this.sseBroadcaster = sse.newBroadcaster();
+    }
+
+    @GET
+    @Path("prices")
+    @Produces("text/event-stream")
+    public void getStockPrices(@Context SseEventSink sseEventSink,
+                               @HeaderParam(HttpHeaders.LAST_EVENT_ID_HEADER) @DefaultValue("-1") int lastReceivedId) {
+
+        int lastEventId = 1;
+        if (lastReceivedId != -1) {
+            lastEventId = ++lastReceivedId;
+        }
+        boolean running = true;
+        while (running) {
+            Stock stock = stockService.getNextTransaction(lastEventId);
+            if (stock != null) {
+                OutboundSseEvent sseEvent = this.eventBuilder
+                        .name("stock")
+                        .id(String.valueOf(lastEventId))
+                        .mediaType(MediaType.APPLICATION_JSON_TYPE)
+                        .data(Stock.class, stock)
+                        .reconnectDelay(3000)
+                        .comment("price change")
+                        .build();
+                sseEventSink.send(sseEvent);
+                lastEventId++;
+            }
+            //Simulate connection close
+            if (lastEventId % 5 == 0) {
+                sseEventSink.close();
+                break;
+            }
+
+            try {
+                //Wait 5 seconds
+                Thread.sleep(5 * 1000);
+            } catch (InterruptedException ex) {
+                // ...
+            }
+            //Simulatae a while boucle break
+            running = lastEventId <= 2000;
+        }
+        sseEventSink.close();
+    }
+
+    @GET
+    @Path("subscribe")
+    @Produces(MediaType.SERVER_SENT_EVENTS)
+    public void listen(@Context SseEventSink sseEventSink) {
+        sseEventSink.send(sse.newEvent("Welcome !"));
+        this.sseBroadcaster.register(sseEventSink);
+        sseEventSink.send(sse.newEvent("You are registred !"));
+    }
+
+    @GET
+    @Path("publish")
+    public void broadcast() {
+        Runnable r = new Runnable() {
+            @Override
+            public void run() {
+                int lastEventId = 0;
+                boolean running = true;
+                while (running) {
+                    lastEventId++;
+                    Stock stock = stockService.getNextTransaction(lastEventId);
+                    if (stock != null) {
+                        OutboundSseEvent sseEvent = eventBuilder
+                                .name("stock")
+                                .id(String.valueOf(lastEventId))
+                                .mediaType(MediaType.APPLICATION_JSON_TYPE)
+                                .data(Stock.class, stock)
+                                .reconnectDelay(3000)
+                                .comment("price change")
+                                .build();
+                        sseBroadcaster.broadcast(sseEvent);
+                    }
+                    try {
+                        //Wait 5 seconds
+                        Thread.currentThread().sleep(5 * 1000);
+                    } catch (InterruptedException ex) {
+                        // ...
+                    }
+                    //Simulatae a while boucle break
+                    running = lastEventId <= 2000;
+                }
+            }
+        };
+        new Thread(r).start();
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/Stock.java

@@ -0,0 +1,50 @@
+package com.baeldung.sse.jaxrs;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+public class Stock {
+    private Integer id;
+    private String name;
+    private BigDecimal price;
+    LocalDateTime dateTime;
+
+    public Stock(Integer id, String name, BigDecimal price, LocalDateTime dateTime) {
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.dateTime = dateTime;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public LocalDateTime getDateTime() {
+        return dateTime;
+    }
+
+    public void setDateTime(LocalDateTime dateTime) {
+        this.dateTime = dateTime;
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/java/com/baeldung/sse/jaxrs/StockService.java

@@ -0,0 +1,78 @@
+package com.baeldung.sse.jaxrs;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.context.Initialized;
+import javax.enterprise.event.Event;
+import javax.enterprise.event.Observes;
+import javax.inject.Inject;
+import javax.inject.Named;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.atomic.AtomicInteger;
+
+@ApplicationScoped
+@Named
+public class StockService {
+
+    private static final BigDecimal UP = BigDecimal.valueOf(1.05f);
+    private static final BigDecimal DOWN = BigDecimal.valueOf(0.95f);
+
+    List<String> stockNames = Arrays.asList("GOOG", "IBM", "MS", "GOOG", "YAHO");
+    List<Stock> stocksDB = new ArrayList<>();
+    private AtomicInteger counter = new AtomicInteger(0);
+
+    public void init(@Observes @Initialized(ApplicationScoped.class) Object init) {
+        //Open price
+        System.out.println("@Start Init ...");
+        stockNames.forEach(stockName -> {
+            stocksDB.add(new Stock(counter.incrementAndGet(), stockName, generateOpenPrice(), LocalDateTime.now()));
+        });
+
+        Runnable runnable = new Runnable() {
+            @Override
+            public void run() {
+                //Simulate Change price and put every x seconds
+                while (true) {
+                    int indx = new Random().nextInt(stockNames.size());
+                    String stockName = stockNames.get(indx);
+                    BigDecimal price = getLastPrice(stockName);
+                    BigDecimal newprice = changePrice(price);
+                    Stock stock = new Stock(counter.incrementAndGet(), stockName, newprice, LocalDateTime.now());
+                    stocksDB.add(stock);
+
+                    int r = new Random().nextInt(30);
+                    try {
+                        Thread.currentThread().sleep(r*1000);
+                    } catch (InterruptedException ex) {
+                        // ...
+                    }
+                }
+            }
+        };
+        new Thread(runnable).start();
+        System.out.println("@End Init ...");
+    }
+
+    public Stock getNextTransaction(Integer lastEventId) {
+        return stocksDB.stream().filter(s -> s.getId().equals(lastEventId)).findFirst().orElse(null);
+    }
+
+    BigDecimal generateOpenPrice() {
+        float min = 70;
+        float max = 120;
+        return BigDecimal.valueOf(min + new Random().nextFloat() * (max - min)).setScale(4,RoundingMode.CEILING);
+    }
+
+    BigDecimal changePrice(BigDecimal price) {
+        return Math.random() >= 0.5 ? price.multiply(UP).setScale(4,RoundingMode.CEILING) : price.multiply(DOWN).setScale(4,RoundingMode.CEILING);
+    }
+
+    private BigDecimal getLastPrice(String stockName) {
+        return stocksDB.stream().filter(stock -> stock.getName().equals(stockName)).findFirst().get().getPrice();
+    }
+}

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/liberty/config/server.xml

@@ -0,0 +1,7 @@
+<server description="OpenLiberty Server">
+    <featureManager>
+        <feature>jaxrs-2.1</feature>
+        <feature>cdi-2.0</feature>
+    </featureManager>
+    <httpEndpoint httpPort="9080" httpsPort="9443" id="defaultHttpEndpoint" host="*"/>
+</server>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/resources/META-INF/beans.xml

@@ -0,0 +1,6 @@
+<beans 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="all">
+</beans>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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_4_0.xsd"
+    version="4.0">
+    <display-name>Hello Servlet</display-name>
+
+    <welcome-file-list>
+        <welcome-file>index.html</welcome-file>
+    </welcome-file-list>
+
+</web-app>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/index.html

@@ -0,0 +1 @@
+index

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse-broadcast.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Server-Sent Event Broadcasting</title>
+</head>
+<body>
+<h2>Stock prices :</h2>
+<div>
+    <ul id="data">
+    </ul>
+</div>
+<script>
+
+    var source = new EventSource('sse/stock/subscribe');
+    source.onopen = function(event) {
+        console.log(event);
+    };
+    source.addEventListener("stock", function(event) {
+        append(event.data);
+    }, false);
+
+    source.onmessage = function(event) {
+        append(event.data);
+    };
+    source.onerror = function(event) {
+        console.log(event);
+    };
+
+    function append(data) {
+        var ul = document.getElementById("data");
+        var li = document.createElement("li");
+        li.appendChild(document.createTextNode(data));
+        ul.insertBefore(li, ul.childNodes[0]);
+    };
+
+</script>
+</body>
+</html>

apache-cxf/sse-jaxrs/sse-jaxrs-server/src/main/webapp/sse.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Server-Sent Event</title>
+</head>
+<body>
+<h2>Stock prices :</h2>
+<div>
+    <ul id="data">
+    </ul>
+</div>
+<script>
+
+    var source = new EventSource('sse/stock/prices');
+    source.onopen = function(event) {
+        console.log(event);
+    };
+    source.addEventListener("stock", function(event) {
+        append(event.data);
+    }, false);
+
+    source.onmessage = function(event) {
+        append(event.data);
+    };
+    source.onerror = function(event) {
+        console.log(event);
+    };
+
+    function append(data) {
+        var ul = document.getElementById("data");
+        var li = document.createElement("li");
+        li.appendChild(document.createTextNode(data));
+        ul.insertBefore(li, ul.childNodes[0]);
+    };
+
+</script>
+</body>
+</html>

apache-fop/src/main/resources/logback.xml

@@ -2,7 +2,7 @@
 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
             </pattern>
         </encoder>
     </appender>

apache-geode/pom.xml

@@ -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>

apache-geode/src/main/java/com/baeldung/geode/Customer.java

@@ -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);
+    }
+}

apache-geode/src/main/java/com/baeldung/geode/CustomerKey.java

@@ -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;
+    }
+}

apache-geode/src/main/java/com/baeldung/geode/functions/UpperCaseNames.java

@@ -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();
+    }
+}

apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java

@@ -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());
+    }
+}

apache-shiro/pom.xml

@@ -3,7 +3,6 @@
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>apache-shiro</artifactId>
     <version>1.0-SNAPSHOT</version>
 
@@ -36,13 +35,11 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>jcl-over-slf4j</artifactId>
-            <version>${slf4j-version}</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>
-            <version>${slf4j-version}</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>
@@ -53,26 +50,9 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
     <properties>
         <apache-shiro-core-version>1.4.0</apache-shiro-core-version>
-        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
-        <java.version>1.8</java.version>
         <log4j-version>1.2.17</log4j-version>
-        <slf4j-version>1.7.25</slf4j-version>
     </properties>
 
 </project>

apache-thrift/pom.xml

@@ -39,6 +39,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>
+                <version>${build-helper-maven-plugin.version}</version>
                 <executions>
                     <execution>
                         <phase>generate-sources</phase>
@@ -60,6 +61,7 @@
         <thrift.version>0.10.0</thrift.version>
         <maven-thrift.version>0.1.11</maven-thrift.version>
         <org.slf4j.slf4j-simple.version>1.7.12</org.slf4j.slf4j-simple.version>
+        <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
     </properties>
 
 </project>

apache-velocity/src/main/resources/logback.xml

@@ -2,7 +2,7 @@
 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <encoder>
-            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
             </pattern>
         </encoder>
     </appender>

asciidoctor/README.md

@@ -1,5 +1,4 @@
 ### Relevant articles
 
-- [Introduction to Asciidoctor](http://www.baeldung.com/introduction-to-asciidoctor)
 - [Generating a Book with Asciidoctor](http://www.baeldung.com/asciidoctor-book)
 - [Introduction to Asciidoctor in Java](http://www.baeldung.com/asciidoctor)

asciidoctor/pom.xml

@@ -61,9 +61,10 @@
     </build>
 
     <properties>
-        <asciidoctor-maven-plugin.version>1.5.5</asciidoctor-maven-plugin.version>
-        <asciidoctorj.version>1.5.4</asciidoctorj.version>
-        <asciidoctorj-pdf.src.version>1.5.0-alpha.11</asciidoctorj-pdf.src.version>
+        <asciidoctor-maven-plugin.version>1.5.6</asciidoctor-maven-plugin.version>
+        <asciidoctorj.version>1.5.6</asciidoctorj.version>
+        
+        <asciidoctorj-pdf.version>1.5.0-alpha.15</asciidoctorj-pdf.version>
         <asciidoctorj-pdf.plugin.version>1.5.0-alpha.15</asciidoctorj-pdf.plugin.version>
     </properties>
 

asciidoctor/src/test/java/com/baeldung/asciidoctor/AsciidoctorDemoIntegrationTest.java

@@ -3,7 +3,7 @@ package com.baeldung.asciidoctor;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class AsciidoctorDemoTest {
+public class AsciidoctorDemoIntegrationTest {
 
     @Test
     public void givenString_whenConverting_thenResultingHTMLCode() {

asm/pom.xml

@@ -42,14 +42,6 @@
                     </archive>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <argLine>-javaagent:"C:\asm-1.0.jar"</argLine>
-                </configuration>
-            </plugin>
         </plugins>
     </build>
 

aws-lambda/pom.xml

@@ -95,7 +95,6 @@
         <gson.version>2.8.2</gson.version>
         <aws-java-sdk.version>1.11.241</aws-java-sdk.version>
         <maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
-        <maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
     </properties>
     
 </project>

aws/.gitignore

@@ -1 +1,2 @@
 /target/
+.idea/

aws/README.md

@@ -9,4 +9,4 @@
 - [Integration Testing with a Local DynamoDB Instance](http://www.baeldung.com/dynamodb-local-integration-tests)
 - [Using the JetS3t Java Client With Amazon S3](http://www.baeldung.com/jets3t-amazon-s3)
 - [Managing Amazon SQS Queues in Java](http://www.baeldung.com/aws-queues-java)
-
+- [Guide to AWS Aurora RDS with Java](https://www.baeldung.com/aws-aurora-rds-java)

aws/pom.xml

@@ -100,26 +100,6 @@
                     </execution>
                 </executions>
             </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-dependency-plugin</artifactId>
-                <version>${maven-dependency-plugin.version}</version>
-                <executions>
-                    <execution>
-                        <id>copy-dependencies</id>
-                        <phase>test-compile</phase>
-                        <goals>
-                            <goal>copy-dependencies</goal>
-                        </goals>
-                        <configuration>
-                            <includeScope>test</includeScope>
-                            <includeTypes>so,dll,dylib</includeTypes>
-                            <outputDirectory>${project.basedir}/native-libs</outputDirectory>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
         </plugins>
     </build>
 
@@ -137,14 +117,13 @@
         <aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
         <gson.version>2.8.0</gson.version>
         <aws-java-sdk.version>1.11.290</aws-java-sdk.version>
-        <mockito-core.version>2.8.9</mockito-core.version>
+        <mockito-core.version>2.21.0</mockito-core.version>
         <assertj-core.version>3.8.0</assertj-core.version>
         <dynamodblocal.version>1.11.86</dynamodblocal.version>
         <dynamodblocal.repository.url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</dynamodblocal.repository.url>
         <commons-codec-version>1.10.L001</commons-codec-version>
         <jets3t-version>0.9.4.0006L</jets3t-version>
         <maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
-        <maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
     </properties>
 
 </project>

aws/src/main/java/com/baeldung/rds/AWSRDSService.java

@@ -0,0 +1,184 @@
+package com.baeldung.rds;
+
+import com.amazonaws.auth.AWSCredentialsProvider;
+import com.amazonaws.auth.AWSStaticCredentialsProvider;
+import com.amazonaws.auth.BasicAWSCredentials;
+import com.amazonaws.regions.Regions;
+import com.amazonaws.services.rds.AmazonRDS;
+import com.amazonaws.services.rds.AmazonRDSClientBuilder;
+import com.amazonaws.services.rds.model.*;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.sql.*;
+import java.util.List;
+import java.util.Properties;
+import java.util.UUID;
+import java.util.logging.Logger;
+
+public class AWSRDSService {
+
+
+    final static Logger logger = Logger.getLogger(AWSRDSService.class.getName());
+    private AWSCredentialsProvider credentials;
+    private AmazonRDS amazonRDS;
+    private String db_username;
+    private String db_password;
+    private String db_database;
+    private String db_hostname;
+
+    /*
+    * User access key and secret key must be set before execute any operation.
+    * Follow the link on how to get the user access and secret key
+    * https://aws.amazon.com/blogs/security/wheres-my-secret-access-key/
+    * **/
+    public AWSRDSService() throws IOException {
+        //Init RDS client with credentials and region.
+        credentials = new
+                AWSStaticCredentialsProvider(new
+                BasicAWSCredentials("<ACCESS_KEY>",
+                "<SECRET_KEY>"));
+        amazonRDS = AmazonRDSClientBuilder.standard().withCredentials(credentials)
+                .withRegion(Regions.AP_SOUTHEAST_2).build();
+        Properties prop = new Properties();
+        InputStream input = AWSRDSService.class.getClassLoader().getResourceAsStream("db.properties");
+        prop.load(input);
+        db_username = prop.getProperty("db_username");
+        db_password = prop.getProperty("db_password");
+        db_database = prop.getProperty("db_database");
+    }
+
+    public AWSRDSService(AmazonRDS amazonRDS){
+        this.amazonRDS = amazonRDS;
+    }
+
+    /**
+     * create the RDS instance.
+     * After instance creation, update the db_hostname with endpoint in db.properties.
+     * */
+
+    public String launchInstance() {
+
+        String identifier = "";
+        CreateDBInstanceRequest request = new CreateDBInstanceRequest();
+        // RDS instance name
+        request.setDBInstanceIdentifier("Sydney");
+        request.setEngine("postgres");
+        request.setMultiAZ(false);
+        request.setMasterUsername(db_username);
+        request.setMasterUserPassword(db_password);
+        request.setDBName(db_database);
+        request.setStorageType("gp2");
+        request.setAllocatedStorage(10);
+
+        DBInstance instance = amazonRDS.createDBInstance(request);
+
+        // Information about the new RDS instance
+        identifier = instance.getDBInstanceIdentifier();
+        String status = instance.getDBInstanceStatus();
+        Endpoint endpoint = instance.getEndpoint();
+        String endpoint_url = "Endpoint URL not available yet.";
+        if (endpoint != null) {
+            endpoint_url = endpoint.toString();
+        }
+        logger.info(identifier + "\t" + status);
+        logger.info(endpoint_url);
+
+        return identifier;
+
+    }
+
+    // Describe DB instances
+    public void listInstances() {
+        DescribeDBInstancesResult result = amazonRDS.describeDBInstances();
+        List<DBInstance> instances = result.getDBInstances();
+        for (DBInstance instance : instances) {
+            // Information about each RDS instance
+            String identifier = instance.getDBInstanceIdentifier();
+            String engine = instance.getEngine();
+            String status = instance.getDBInstanceStatus();
+            Endpoint endpoint = instance.getEndpoint();
+            String endpoint_url = "Endpoint URL not available yet.";
+            if (endpoint != null) {
+                endpoint_url = endpoint.toString();
+            }
+            logger.info(identifier + "\t" + engine + "\t" + status);
+            logger.info("\t" + endpoint_url);
+        }
+
+    }
+
+    //Delete RDS instance
+    public void terminateInstance(String identifier) {
+
+        DeleteDBInstanceRequest request = new DeleteDBInstanceRequest();
+        request.setDBInstanceIdentifier(identifier);
+        request.setSkipFinalSnapshot(true);
+
+        // Delete the RDS instance
+        DBInstance instance = amazonRDS.deleteDBInstance(request);
+
+        // Information about the RDS instance being deleted
+        String status = instance.getDBInstanceStatus();
+        Endpoint endpoint = instance.getEndpoint();
+        String endpoint_url = "Endpoint URL not available yet.";
+        if (endpoint != null) {
+            endpoint_url = endpoint.toString();
+        }
+
+        logger.info(identifier + "\t" + status);
+        logger.info(endpoint_url);
+
+    }
+
+
+    public void runJdbcTests() throws SQLException, IOException {
+
+        // Getting database properties from db.properties
+        Properties prop = new Properties();
+        InputStream input = AWSRDSService.class.getClassLoader().getResourceAsStream("db.properties");
+        prop.load(input);
+        db_hostname = prop.getProperty("db_hostname");
+        String jdbc_url = "jdbc:postgresql://" + db_hostname + ":5432/" + db_database;
+
+        // Create a connection using the JDBC driver
+        try (Connection conn = DriverManager.getConnection(jdbc_url, db_username, db_password)) {
+
+            // Create the test table if not exists
+            Statement statement = conn.createStatement();
+            String sql = "CREATE TABLE IF NOT EXISTS jdbc_test (id SERIAL PRIMARY KEY, content VARCHAR(80))";
+            statement.executeUpdate(sql);
+
+            // Do some INSERT
+            PreparedStatement preparedStatement = conn.prepareStatement("INSERT INTO jdbc_test (content) VALUES (?)");
+            String content = "" + UUID.randomUUID();
+            preparedStatement.setString(1, content);
+            preparedStatement.executeUpdate();
+            logger.info("INSERT: " + content);
+
+            // Do some SELECT
+            sql = "SELECT  * FROM jdbc_test";
+            ResultSet resultSet = statement.executeQuery(sql);
+            while (resultSet.next()) {
+                String count = resultSet.getString("content");
+                logger.info("Total Records: " + count);
+            }
+        }
+
+
+    }
+
+    public static void main(String[] args) throws IOException, SQLException {
+        AWSRDSService awsrdsService = new AWSRDSService();
+
+        String instanceName = awsrdsService.launchInstance();
+
+        //Add some wait for instance creation.
+
+        awsrdsService.listInstances();
+
+        awsrdsService.runJdbcTests();
+
+        awsrdsService.terminateInstance(instanceName);
+    }
+}

aws/src/main/resources/db.properties

@@ -0,0 +1,4 @@
+db_hostname=<RDS EndPoint>
+db_username=username
+db_password=password
+db_database=mydb

cas/cas-secured-app/pom.xml

@@ -2,12 +2,10 @@
 <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>cas-secured-app</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>cas-secured-app</name>
-    <description>Demo project for Spring Boot</description>
+    <description>Demo project for CAS</description>
 
     <parent>
         <artifactId>parent-boot-1</artifactId>
@@ -60,10 +58,4 @@
         </plugins>
     </build>
 
-    <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
-    </properties>
-
 </project>

cas/cas-server/pom.xml

@@ -2,11 +2,17 @@
 <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>cas-server</artifactId>
     <packaging>war</packaging>
     <version>1.0</version>
 
+    <parent>
+        <artifactId>parent-boot-1</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-1</relativePath>
+    </parent>
+    
     <dependencies>
         <dependency>
             <groupId>org.apereo.cas</groupId>
@@ -39,7 +45,6 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
-                <version>${springboot.version}</version>
                 <configuration>
                     <mainClass>${mainClassName}</mainClass>
                     <addResources>true</addResources>
@@ -74,42 +79,10 @@
                     </overlays>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-            </plugin>
         </plugins>
         <finalName>cas</finalName>
     </build>
 
-    <repositories>
-        <repository>
-            <id>sonatype-releases</id>
-            <url>http://oss.sonatype.org/content/repositories/releases/</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-            <releases>
-                <enabled>true</enabled>
-            </releases>
-        </repository>
-        <repository>
-            <id>sonatype-snapshots</id>
-            <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
-            <snapshots>
-                <enabled>true</enabled>
-            </snapshots>
-            <releases>
-                <enabled>false</enabled>
-            </releases>
-        </repository>
-        <repository>
-            <id>shibboleth-releases</id>
-            <url>https://build.shibboleth.net/nexus/content/repositories/releases</url>
-        </repository>
-    </repositories>
-
     <profiles>
         <profile>
             <activation>
@@ -214,8 +187,7 @@
     </profiles>
 
     <properties>
-        <cas.version>5.3.0-SNAPSHOT</cas.version>
-        <springboot.version>1.5.13.RELEASE</springboot.version>
+        <cas.version>5.3.3</cas.version>
         <!-- app.server could be -jetty, -undertow, -tomcat, or blank if you plan to provide appserver -->
         <app.server>-tomcat</app.server>
 
@@ -223,14 +195,12 @@
         <isExecutable>false</isExecutable>
         <manifestFileToUse>${project.build.directory}/war/work/org.apereo.cas/cas-server-webapp${app.server}/META-INF/MANIFEST.MF</manifestFileToUse>
 
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <wrapper-maven-plugin.version>0.0.4</wrapper-maven-plugin.version>
         <maven-war-plugin.version>2.6</maven-war-plugin.version>
         <maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
+        
         <echo-maven-plugin.version>0.3.0</echo-maven-plugin.version>
         <pgpverify-maven-plugin.version>1.1.0</pgpverify-maven-plugin.version>
     </properties>
 
-</project>
+</project>

cdi-portable-extension/flyway-cdi/pom.xml

@@ -0,0 +1,38 @@
+<?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>
+
+    <artifactId>flyway-cdi</artifactId>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>cdi-portable-extension</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax.enterprise</groupId>
+            <artifactId>cdi-api</artifactId>
+            <version>2.0.SP1</version>
+        </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>
+    </dependencies>
+
+</project>

cdi-portable-extension/flyway-cdi/src/main/java/com/baeldung/cdi/extension/FlywayExtension.java

@@ -0,0 +1,74 @@
+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();
+    }
+}

cdi-portable-extension/flyway-cdi/src/main/java/com/baeldung/cdi/extension/FlywayType.java

@@ -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 {
+}

cdi-portable-extension/flyway-cdi/src/main/resources/META-INF/beans.xml

@@ -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>

cdi-portable-extension/flyway-cdi/src/main/resources/META-INF/services/javax.enterprise.inject.spi.Extension

@@ -0,0 +1,2 @@
+com.baeldung.cdi.extension.FlywayExtension
+

cdi-portable-extension/main-app/pom.xml

@@ -0,0 +1,52 @@
+<?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>
+
+    <artifactId>main-app</artifactId>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>cdi-portable-extension</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <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>com.baeldung</groupId>
+            <artifactId>flyway-cdi</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>1.4.197</version>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>javax.annotation</groupId>
+            <artifactId>javax.annotation-api</artifactId>
+            <version>1.3.2</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

cdi-portable-extension/main-app/src/main/java/com/baeldung/cdi/extension/MainApp.java

@@ -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()) {
+        }
+    }
+}

cdi-portable-extension/main-app/src/main/resources/META-INF/beans.xml

@@ -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>