fixed conflict

core-java-modules/core-java-concurrency-advanced-3/pom.xml

@@ -1,7 +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/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+    http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>core-java-concurrency-advanced-3</artifactId>
     <version>0.1.0-SNAPSHOT</version>
     <name>core-java-concurrency-advanced-3</name>
@@ -14,6 +16,15 @@
         <relativePath>../../parent-java</relativePath>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
     <build>
         <finalName>core-java-concurrency-advanced-3</finalName>
         <plugins>
@@ -35,6 +46,7 @@
     </build>
 
     <properties>
+        <assertj.version>3.14.0</assertj.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
     </properties>

core-java-modules/core-java-concurrency-advanced-3/src/test/java/com/baeldung/rejection/SaturationPolicyUnitTest.java

@@ -0,0 +1,136 @@
+package com.baeldung.rejection;
+
+import org.junit.After;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.*;
+import java.util.concurrent.ThreadPoolExecutor.AbortPolicy;
+import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy;
+import java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy;
+import java.util.concurrent.ThreadPoolExecutor.DiscardPolicy;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+public class SaturationPolicyUnitTest {
+
+    private ThreadPoolExecutor executor;
+
+    @After
+    public void shutdownExecutor() {
+        if (executor != null && !executor.isTerminated()) {
+            executor.shutdownNow();
+        }
+    }
+
+    @Test
+    public void givenAbortPolicy_WhenSaturated_ThenShouldThrowRejectedExecutionException() {
+        executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new SynchronousQueue<>(), new AbortPolicy());
+        executor.execute(() -> waitFor(100));
+
+        assertThatThrownBy(() -> executor.execute(() -> System.out.println("Will be rejected"))).isInstanceOf(RejectedExecutionException.class);
+    }
+
+    @Test
+    public void givenCallerRunsPolicy_WhenSaturated_ThenTheCallerThreadRunsTheTask() {
+        executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new SynchronousQueue<>(), new CallerRunsPolicy());
+        executor.execute(() -> waitFor(100));
+
+        long startTime = System.nanoTime();
+        executor.execute(() -> waitFor(100));
+        double blockedDuration = (System.nanoTime() - startTime) / 1_000_000.0;
+
+        assertThat(blockedDuration).isGreaterThanOrEqualTo(100);
+    }
+
+    @Test
+    public void givenDiscardPolicy_WhenSaturated_ThenExecutorDiscardsTheNewTask() throws InterruptedException {
+        executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new SynchronousQueue<>(), new DiscardPolicy());
+        executor.execute(() -> waitFor(100));
+
+        BlockingQueue<String> queue = new LinkedBlockingDeque<>();
+        executor.execute(() -> queue.offer("Result"));
+
+        assertThat(queue.poll(200, MILLISECONDS)).isNull();
+    }
+
+    @Test
+    public void givenDiscardOldestPolicy_WhenSaturated_ThenExecutorDiscardsTheOldestTask() {
+        executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new ArrayBlockingQueue<>(2), new DiscardOldestPolicy());
+        executor.execute(() -> waitFor(100));
+
+        BlockingQueue<String> queue = new LinkedBlockingDeque<>();
+        executor.execute(() -> queue.offer("First"));
+        executor.execute(() -> queue.offer("Second"));
+        executor.execute(() -> queue.offer("Third"));
+
+        waitFor(150);
+        List<String> results = new ArrayList<>();
+        queue.drainTo(results);
+        assertThat(results).containsExactlyInAnyOrder("Second", "Third");
+    }
+
+    @Test
+    public void givenGrowPolicy_WhenSaturated_ThenExecutorIncreaseTheMaxPoolSize() {
+        executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new ArrayBlockingQueue<>(2), new GrowPolicy());
+        executor.execute(() -> waitFor(100));
+
+        BlockingQueue<String> queue = new LinkedBlockingDeque<>();
+        executor.execute(() -> queue.offer("First"));
+        executor.execute(() -> queue.offer("Second"));
+        executor.execute(() -> queue.offer("Third"));
+
+        waitFor(150);
+        List<String> results = new ArrayList<>();
+        queue.drainTo(results);
+        assertThat(results).containsExactlyInAnyOrder("First", "Second", "Third");
+    }
+
+    @Test
+    public void givenExecutorIsTerminated_WhenSubmittedNewTask_ThenTheSaturationPolicyApplies() {
+        ThreadPoolExecutor executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new LinkedBlockingQueue<>());
+        executor.shutdownNow();
+
+        assertThatThrownBy(() -> executor.execute(() -> {
+        })).isInstanceOf(RejectedExecutionException.class);
+    }
+
+    @Test
+    public void givenExecutorIsTerminating_WhenSubmittedNewTask_ThenTheSaturationPolicyApplies() {
+        ThreadPoolExecutor executor = new ThreadPoolExecutor(1, 1, 0, MILLISECONDS, new LinkedBlockingQueue<>());
+        executor.execute(() -> waitFor(100));
+        executor.shutdown();
+
+        assertThatThrownBy(() -> executor.execute(() -> {
+        })).isInstanceOf(RejectedExecutionException.class);
+    }
+
+    private static class GrowPolicy implements RejectedExecutionHandler {
+
+        private final Lock lock = new ReentrantLock();
+
+        @Override
+        public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
+            lock.lock();
+            try {
+                executor.setMaximumPoolSize(executor.getMaximumPoolSize() + 1);
+            } finally {
+                lock.unlock();
+            }
+
+            executor.submit(r);
+        }
+    }
+
+    private void waitFor(int millis) {
+        try {
+            Thread.sleep(millis);
+        } catch (InterruptedException ignored) {
+        }
+    }
+}

core-java-modules/core-java-concurrency-basic/src/test/java/com/baeldung/concurrent/threadsafety/CounterUnitTest.java

@@ -18,8 +18,11 @@ public class CounterUnitTest {
         Counter counter = new Counter();
         Future<Integer> future1 = (Future<Integer>) executorService.submit(new CounterCallable(counter));
         Future<Integer> future2 = (Future<Integer>) executorService.submit(new CounterCallable(counter));
-        
-        assertThat(future1.get()).isEqualTo(1);
-        assertThat(future2.get()).isEqualTo(2);
+
+        // Just to make sure both are completed
+        future1.get();
+        future2.get();
+
+        assertThat(counter.getCounter()).isEqualTo(2);
     }
 }

core-java-modules/core-java-concurrency-basic/src/test/java/com/baeldung/concurrent/threadsafety/ExtrinsicLockCounterUnitTest.java

@@ -18,8 +18,11 @@ public class ExtrinsicLockCounterUnitTest {
         ExtrinsicLockCounter counter = new ExtrinsicLockCounter();
         Future<Integer> future1 = (Future<Integer>) executorService.submit(new ExtrinsicLockCounterCallable(counter));
         Future<Integer> future2 = (Future<Integer>) executorService.submit(new ExtrinsicLockCounterCallable(counter));
-        
-        assertThat(future1.get()).isEqualTo(1);
-        assertThat(future2.get()).isEqualTo(2);
+
+        // Just to make sure both are completed
+        future1.get();
+        future2.get();
+
+        assertThat(counter.getCounter()).isEqualTo(2);
     }
 }

core-java-modules/core-java-concurrency-basic/src/test/java/com/baeldung/concurrent/threadsafety/ReentrantLockCounterUnitTest.java

@@ -11,15 +11,18 @@ import java.util.concurrent.Future;
 import static org.assertj.core.api.Assertions.assertThat;
 
 public class ReentrantLockCounterUnitTest {
-    
+
     @Test
     public void whenCalledIncrementCounter_thenCorrect() throws Exception {
         ExecutorService executorService = Executors.newFixedThreadPool(2);
         ReentrantLockCounter counter = new ReentrantLockCounter();
         Future<Integer> future1 = (Future<Integer>) executorService.submit(new ReentrantLockCounterCallable(counter));
         Future<Integer> future2 = (Future<Integer>) executorService.submit(new ReentrantLockCounterCallable(counter));
-        
-        assertThat(future1.get()).isEqualTo(1);
-        assertThat(future2.get()).isEqualTo(2);
+
+        // Just to make sure both are completed
+        future1.get();
+        future2.get();
+
+        assertThat(counter.getCounter()).isEqualTo(2);
     }
 }

core-java-modules/core-java-concurrency-basic/src/test/java/com/baeldung/concurrent/threadsafety/ReentrantReadWriteLockCounterUnitTest.java

@@ -11,16 +11,19 @@ import java.util.concurrent.Future;
 import static org.assertj.core.api.Assertions.assertThat;
 
 public class ReentrantReadWriteLockCounterUnitTest {
-    
+
     @Test
     public void whenCalledIncrementCounter_thenCorrect() throws Exception {
         ExecutorService executorService = Executors.newFixedThreadPool(2);
         ReentrantReadWriteLockCounter counter = new ReentrantReadWriteLockCounter();
-        Future<Integer> future1 = (Future<Integer>) executorService.submit(new  ReentranReadWriteLockCounterCallable(counter));
-        Future<Integer> future2 = (Future<Integer>) executorService.submit(new  ReentranReadWriteLockCounterCallable(counter));
+        Future<Integer> future1 = (Future<Integer>) executorService.submit(new ReentranReadWriteLockCounterCallable(counter));
+        Future<Integer> future2 = (Future<Integer>) executorService.submit(new ReentranReadWriteLockCounterCallable(counter));
 
-        assertThat(future2.get()).isEqualTo(2);
-        assertThat(future1.get()).isEqualTo(1);
+        // Just to make sure both are completed
+        future1.get();
+        future2.get();
+
+        assertThat(counter.getCounter()).isEqualTo(2);
     }
-    
+
 }

core-java-modules/core-java-date-operations/src/test/java/com/baeldung/datetime/sql/DateUtilsUnitTest.java

@@ -2,18 +2,16 @@ package com.baeldung.datetime.sql;
 
 import static org.junit.Assert.assertEquals;
 
-import org.junit.Test;
-
-import com.baeldung.datetime.sql.DateUtils;
-
 import java.text.ParseException;
-import java.util.Date;
+import java.time.LocalDate;
+
+import org.junit.Test;
 
 public class DateUtilsUnitTest {
 
     @Test
     public void givenCurrentDate_thenTodayIsReturned() {
-        assertEquals(DateUtils.getNow(), new Date());
+        assertEquals(DateUtils.getNow().toLocalDate(), LocalDate.now());
     }
 
     @Test(expected = IllegalArgumentException.class)

core-java-modules/core-java-date-operations/src/test/java/com/baeldung/timezone/ModifyDefaultTimezoneUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.timezone;
+
+import org.junit.Test;
+
+import java.util.Calendar;
+import java.util.Date;
+import java.util.TimeZone;
+
+import static org.junit.Assert.assertEquals;
+
+public class ModifyDefaultTimezoneUnitTest {
+
+    @Test
+    public void givenDefaultTimezoneSet_thenDateTimezoneIsCorrect() {
+        TimeZone.setDefault(TimeZone.getTimeZone("Portugal"));
+        Date date = new Date();
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+        assertEquals(calendar.getTimeZone(), TimeZone.getTimeZone("Portugal"));
+    }
+
+}

core-java-modules/core-java-date-operations/src/test/java/com/baeldung/timezone/ModifyTimezonePropertyUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.timezone;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Calendar;
+import java.util.Date;
+import java.util.TimeZone;
+
+import static org.junit.Assert.assertEquals;
+
+public class ModifyTimezonePropertyUnitTest {
+
+    @Before
+    public void setup() {
+        System.setProperty("user.timezone", "IST");
+        TimeZone.setDefault(null);
+    }
+
+    @After
+    public void teardown() {
+        System.clearProperty("user.timezone");
+    }
+
+    @Test
+    public void givenTimezonePropertySet_thenDateTimezoneIsCorrect() {
+        Date date = new Date();
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+        assertEquals(calendar.getTimeZone(), TimeZone.getTimeZone("IST"));
+    }
+
+}

core-java-modules/core-java-lang-math/src/main/java/com/baeldung/calculator/basic/BasicCalculatorIfElse.java

@@ -1,4 +1,4 @@
-package com.baeldung.maths.calculator.basic;
+package com.baeldung.calculator.basic;
 
 import java.util.InputMismatchException;
 import java.util.Scanner;
@@ -7,19 +7,14 @@ public class BasicCalculatorIfElse {
 
     public static void main(String[] args) {
 
-        System.out.println("---------------------------------- \n" +
-                "Welcome to Basic Calculator \n" +
-                "----------------------------------");
-        System.out.println("Following operations are supported : \n" +
-                "1. Addition (+) \n" +
-                "2. Subtraction (-) \n" +
-                "3. Multiplication (* OR x) \n" +
-                "4. Division (/) \n");
+        System.out.println("---------------------------------- \n" + "Welcome to Basic Calculator \n" + "----------------------------------");
+        System.out.println("Following operations are supported : \n" + "1. Addition (+) \n" + "2. Subtraction (-) \n" + "3. Multiplication (* OR x) \n" + "4. Division (/) \n");
 
         Scanner scanner = new Scanner(System.in);
         try {
             System.out.println("Enter an operator: (+ OR - OR * OR /) ");
-            char operation = scanner.next().charAt(0);
+            char operation = scanner.next()
+                .charAt(0);
 
             if (!(operation == '+' || operation == '-' || operation == '*' || operation == 'x' || operation == '/')) {
                 System.err.println("Invalid Operator. Please use only + or - or * or /");

core-java-modules/core-java-lang-math/src/main/java/com/baeldung/calculator/basic/BasicCalculatorSwitchCase.java

@@ -1,4 +1,4 @@
-package com.baeldung.maths.calculator.basic;
+package com.baeldung.calculator.basic;
 
 import java.util.InputMismatchException;
 import java.util.Scanner;
@@ -6,19 +6,14 @@ import java.util.Scanner;
 public class BasicCalculatorSwitchCase {
     public static void main(String[] args) {
 
-        System.out.println("---------------------------------- \n"
-            + "Welcome to Basic Calculator \n"
-            + "----------------------------------");
-        System.out.println("Following operations are supported : \n" +
-                "1. Addition (+) \n" +
-                "2. Subtraction (-) \n" +
-                "3. Multiplication (* OR x) \n" +
-                "4. Division (/) \n");
+        System.out.println("---------------------------------- \n" + "Welcome to Basic Calculator \n" + "----------------------------------");
+        System.out.println("Following operations are supported : \n" + "1. Addition (+) \n" + "2. Subtraction (-) \n" + "3. Multiplication (* OR x) \n" + "4. Division (/) \n");
 
         Scanner scanner = new Scanner(System.in);
         try {
             System.out.println("Enter an operator: (+ OR - OR * OR /) ");
-            char operation = scanner.next().charAt(0);
+            char operation = scanner.next()
+                .charAt(0);
 
             if (!(operation == '+' || operation == '-' || operation == '*' || operation == 'x' || operation == '/')) {
                 System.err.println("Invalid Operator. Please use only + or - or * or /");
@@ -35,24 +30,24 @@ public class BasicCalculatorSwitchCase {
             }
 
             switch (operation) {
-                case '+':
-                    System.out.println(num1 + " + " + num2 + " = " + (num1 + num2));
-                    break;
-                case '-':
-                    System.out.println(num1 + " - " + num2 + " = " + (num1 - num2));
-                    break;
-                case '*':
-                    System.out.println(num1 + " x " + num2 + " = " + (num1 * num2));
-                    break;
-                case 'x':
-                    System.out.println(num1 + " x " + num2 + " = " + (num1 * num2));
-                    break;
-                case '/':
-                    System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
-                    break;
-                default:
-                    System.err.println("Invalid Operator Specified.");
-                    break;
+            case '+':
+                System.out.println(num1 + " + " + num2 + " = " + (num1 + num2));
+                break;
+            case '-':
+                System.out.println(num1 + " - " + num2 + " = " + (num1 - num2));
+                break;
+            case '*':
+                System.out.println(num1 + " x " + num2 + " = " + (num1 * num2));
+                break;
+            case 'x':
+                System.out.println(num1 + " x " + num2 + " = " + (num1 * num2));
+                break;
+            case '/':
+                System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
+                break;
+            default:
+                System.err.println("Invalid Operator Specified.");
+                break;
             }
         } catch (InputMismatchException exc) {
             System.err.println(exc.getMessage());
@@ -60,5 +55,4 @@ public class BasicCalculatorSwitchCase {
             scanner.close();
         }
     }
-}
-
+}

json/pom.xml

@@ -29,6 +29,11 @@
             <artifactId>fastjson</artifactId>
             <version>${fastjson.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.json</groupId>
+            <artifactId>json</artifactId>
+            <version>${json.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>

kotlin-libraries/pom.xml

@@ -56,7 +56,6 @@
         <dependency>
             <groupId>org.junit.platform</groupId>
             <artifactId>junit-platform-runner</artifactId>
-            <version>${junit.platform.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -78,7 +77,6 @@
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -94,8 +92,7 @@
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>${h2.version}</version>
-        </dependency>
+            </dependency>
         <!-- https://mvnrepository.com/artifact/io.arrow-kt/arrow-core -->
         <dependency>
             <groupId>io.arrow-kt</groupId>
@@ -125,7 +122,6 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
 
@@ -133,13 +129,11 @@
         <dependency>
             <groupId>net.bytebuddy</groupId>
             <artifactId>byte-buddy</artifactId>
-            <version>${byte-buddy.version}</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>net.bytebuddy</groupId>
             <artifactId>byte-buddy-agent</artifactId>
-            <version>${byte-buddy.version}</version>
             <scope>compile</scope>
         </dependency>
         <dependency>

libraries-3/pom.xml

@@ -12,22 +12,6 @@
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <repositories>
-        <repository>
-            <id>jboss-public-repository-group</id>
-            <name>JBoss Public Repository Group</name>
-            <url>http://repository.jboss.org/nexus/content/groups/public/</url>
-            <releases>
-                <enabled>true</enabled>
-                <updatePolicy>never</updatePolicy>
-            </releases>
-            <snapshots>
-                <enabled>true</enabled>
-                <updatePolicy>daily</updatePolicy>
-            </snapshots>
-        </repository>
-    </repositories>
-
     <dependencies>
         <dependency>
             <groupId>com.beust</groupId>
@@ -44,8 +28,5 @@
     <properties>
         <jcommander.version>1.78</jcommander.version>
         <lombok.version>1.18.6</lombok.version>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <maven.compiler.source>1.8</maven.compiler.source>
     </properties>
 </project>

libraries-apache-commons/pom.xml

@@ -48,15 +48,10 @@
             <version>${common-math3.version}</version>
         </dependency>
         <dependency>
-            <groupId>commons-net</groupId>
-            <artifactId>commons-net</artifactId>
-            <version>${commons-net.version}</version>
-        </dependency>
-		<dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
             <version>${h2.version}</version>
-        </dependency>
+        </dependency>        
         <dependency>
             <groupId>org.knowm.xchart</groupId>
             <artifactId>xchart</artifactId>
@@ -71,9 +66,7 @@
         <commons-chain.version>1.2</commons-chain.version>
         <assertj.version>3.6.2</assertj.version>
         <commons.dbutils.version>1.6</commons.dbutils.version>
-        <commons-codec-version>1.10.L001</commons-codec-version>
         <xchart-version>3.5.2</xchart-version>
-        <commons-net.version>3.6</commons-net.version>
         <common-math3.version>3.6.1</common-math3.version>
     </properties>
 

libraries-data-2/pom.xml

@@ -87,11 +87,6 @@
             <artifactId>spring-web</artifactId>
             <version>${spring.version}</version>
         </dependency>
-        <dependency>
-            <groupId>com.google.api-client</groupId>
-            <artifactId>google-api-client</artifactId>
-            <version>${google-api.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.googlecode.jmapper-framework</groupId>
             <artifactId>jmapper-core</artifactId>
@@ -153,7 +148,6 @@
         <infinispan.version>9.1.5.Final</infinispan.version>
         <jackson.version>2.9.8</jackson.version>
         <spring.version>4.3.8.RELEASE</spring.version>
-        <google-api.version>1.23.0</google-api.version>
         <jmapper.version>1.6.0.1</jmapper.version>
         <suanshu.version>4.0.0</suanshu.version>
         <derive4j.version>1.1.0</derive4j.version>

libraries-data-db/pom.xml

@@ -54,21 +54,11 @@
             <artifactId>datanucleus-maven-plugin</artifactId>
             <version>${datanucleus-maven-plugin.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.datanucleus</groupId>
-            <artifactId>datanucleus-xml</artifactId>
-            <version>${datanucleus-xml.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.datanucleus</groupId>
             <artifactId>datanucleus-jdo-query</artifactId>
             <version>${datanucleus-jdo-query.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>${slf4j.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -218,10 +208,8 @@
         <ormlite.version>5.0</ormlite.version>
         <datanucleus.version>5.1.1</datanucleus.version>
         <datanucleus-maven-plugin.version>5.0.2</datanucleus-maven-plugin.version>
-        <datanucleus-xml.version>5.0.0-release</datanucleus-xml.version>
         <datanucleus-jdo-query.version>5.0.4</datanucleus-jdo-query.version>
         <javax.jdo.version>3.2.0-m7</javax.jdo.version>
-        <slf4j.version>1.7.25</slf4j.version>
         <HikariCP.version>2.7.2</HikariCP.version>
         <ebean.version>11.22.4</ebean.version>
     </properties>

libraries-data-io/pom.xml

@@ -35,11 +35,6 @@
             <version>${opencsv.version}</version>
         </dependency>
         <!-- google api -->
-        <dependency>
-            <groupId>com.google.api-client</groupId>
-            <artifactId>google-api-client</artifactId>
-            <version>${google-api.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.google.oauth-client</groupId>
             <artifactId>google-oauth-client-jetty</artifactId>

libraries-data/pom.xml

@@ -13,11 +13,6 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
-            <version>${h2.version}</version>
-        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -29,17 +24,6 @@
             <artifactId>kafka-streams</artifactId>
             <version>${kafka.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.kafka</groupId>
-            <artifactId>kafka-clients</artifactId>
-            <version>${kafka.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.slf4j</groupId>
-                    <artifactId>slf4j-log4j12</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
         <dependency>
             <groupId>org.apache.kafka</groupId>
             <artifactId>kafka-clients</artifactId>
@@ -57,11 +41,6 @@
             <artifactId>ignite-spring-data</artifactId>
             <version>${ignite.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.ignite</groupId>
-            <artifactId>ignite-indexing</artifactId>
-            <version>${ignite.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
@@ -116,59 +95,17 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        <dependency>
-            <groupId>org.apache.flink</groupId>
-            <artifactId>flink-connector-kafka-0.11_2.11</artifactId>
-            <version>${flink.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.flink</groupId>
-            <artifactId>flink-streaming-java_2.11</artifactId>
-            <version>${flink.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.datatype</groupId>
-            <artifactId>jackson-datatype-jsr310</artifactId>
-            <version>${jackson.version}</version>
-        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.flink</groupId>
-            <artifactId>flink-core</artifactId>
-            <version>${flink.version}</version>
-            <exclusions>
-                <exclusion>
-                    <artifactId>commons-logging</artifactId>
-                    <groupId>commons-logging</groupId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.flink</groupId>
-            <artifactId>flink-java</artifactId>
-            <version>${flink.version}</version>
-            <exclusions>
-                <exclusion>
-                    <artifactId>commons-logging</artifactId>
-                    <groupId>commons-logging</groupId>
-                </exclusion>
-            </exclusions>
-        </dependency>
         <dependency>
             <groupId>org.apache.flink</groupId>
             <artifactId>flink-test-utils_2.11</artifactId>
             <version>${flink.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
@@ -189,22 +126,6 @@
                 </exclusion>
             </exclusions>
         </dependency>
-
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-core</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>${slf4j.version}</version>
-        </dependency>
     </dependencies>
 
     <build>
@@ -243,14 +164,10 @@
         <gson.version>2.8.2</gson.version>
         <cache.version>1.1.0</cache.version>
         <flink.version>1.5.0</flink.version>
-        <assertj.version>3.6.2</assertj.version>
         <hazelcast.version>3.8.4</hazelcast.version>
-        <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
-        <build-helper-maven-plugin.version>3.0.0</build-helper-maven-plugin.version>
         <org.apache.crunch.crunch-core.version>0.15.0</org.apache.crunch.crunch-core.version>
         <org.apache.hadoop.hadoop-client>2.2.0</org.apache.hadoop.hadoop-client> 
         <slf4j.version>1.7.25</slf4j.version>
-        <logback.version>1.0.1</logback.version>          
     </properties>
 
 </project>

libraries-http/pom.xml

@@ -38,11 +38,6 @@
             <artifactId>google-http-client-jackson2</artifactId>
             <version>${googleclient.version}</version>
         </dependency>
-        <dependency>
-            <groupId>com.google.http-client</groupId>
-            <artifactId>google-http-client-gson</artifactId>
-            <version>${googleclient.version}</version>
-        </dependency>
 
 		<!-- Retrofit -->
 		<dependency>

libraries-primitive/pom.xml

@@ -13,43 +13,42 @@
         <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>fastutil</artifactId>
-            <version>8.2.2</version>
+            <version>${fastutil.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/junit/junit -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.openjdk.jmh/jmh-core -->
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
-            <version>1.19</version>
+            <version>${jmh.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-generator-annprocess</artifactId>
-            <version>1.19</version>
+            <version>${jmh.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- Eclipse Collections -->
-        <dependency>
-            <groupId>org.eclipse.collections</groupId>
-            <artifactId>eclipse-collections-api</artifactId>
-            <version>10.0.0</version>
-        </dependency>
         <dependency>
             <groupId>org.eclipse.collections</groupId>
             <artifactId>eclipse-collections</artifactId>
-            <version>10.0.0</version>
+            <version>${eclipse-collections.version}</version>
         </dependency>
     </dependencies>
 
     <properties>
+        <fastutil.version>8.2.2</fastutil.version>
+        <junit.version>4.12</junit.version>
+        <jmh.version>1.19</jmh.version>
+        <eclipse-collections.version>10.0.0</eclipse-collections.version>
         <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.target>1.8</maven.compiler.target>		
     </properties>
 </project>

libraries-security/pom.xml

@@ -23,12 +23,10 @@
         <dependency>
             <groupId>org.springframework.security.oauth</groupId>
             <artifactId>spring-security-oauth2</artifactId>
-            <version>${spring-security-oauth2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>
-            <version>${spring.version}</version>
         </dependency>
 
         <dependency>
@@ -55,7 +53,6 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -76,14 +73,11 @@
     </dependencies>
 
     <properties>
-        <spring-boot-maven-plugin.version>2.0.4.RELEASE</spring-boot-maven-plugin.version>
         <scribejava.version>5.6.0</scribejava.version>
-		<spring-security-oauth2.version>2.3.3.RELEASE</spring-security-oauth2.version>
 		<passay.version>1.3.1</passay.version>
         <tink.version>1.2.2</tink.version>
 		<cryptacular.version>1.2.2</cryptacular.version>
         <jasypt.version>1.9.2</jasypt.version>
         <bouncycastle.version>1.58</bouncycastle.version>
-        <spring.version>4.3.8.RELEASE</spring.version>
     </properties>
 </project>

libraries-server/pom.xml

@@ -79,12 +79,6 @@
              <version>${smack.version}</version>
          </dependency>
 
-         <dependency>
-             <groupId>org.igniterealtime.smack</groupId>
-             <artifactId>smack-im</artifactId>
-             <version>${smack.version}</version>
-         </dependency>
-
          <dependency>
              <groupId>org.igniterealtime.smack</groupId>
              <artifactId>smack-extensions</artifactId>
@@ -116,7 +110,6 @@
         <httpclient.version>4.5.3</httpclient.version>
         <jetty.version>9.4.8.v20171121</jetty.version>
         <netty.version>4.1.20.Final</netty.version>
-        <commons.collections.version>4.1</commons.collections.version>
         <tomcat.version>8.5.24</tomcat.version>
         <smack.version>4.3.1</smack.version>
         <eclipse.paho.client.mqttv3.version>1.2.0</eclipse.paho.client.mqttv3.version>

linkrest/pom.xml

@@ -23,16 +23,6 @@
             <artifactId>jersey-container-servlet</artifactId>
             <version>${jersey.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.glassfish.jersey.media</groupId>
-            <artifactId>jersey-media-moxy</artifactId>
-            <version>${jersey.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
-            <version>${h2.version}</version>
-        </dependency>
     </dependencies>
 
     <build>

lucene/pom.xml

@@ -32,10 +32,6 @@
     </dependencies>
 
     <properties>
-        <!-- various -->
-        <hibernate-jpa-2.1-api.version>1.0.0.Final</hibernate-jpa-2.1-api.version>
-        <!-- delombok maven plugin -->
-        <delombok-maven-plugin.version>1.16.10.0</delombok-maven-plugin.version>
         <lucene.version>7.4.0</lucene.version>
     </properties>
 

maven-all/maven/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>maven</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>maven</name>
@@ -307,7 +306,6 @@
         <maven.verifier.version>1.1</maven.verifier.version>
         <maven.clean.version>3.0.0</maven.clean.version>
         <maven.build.helper.version>3.0.0</maven.build.helper.version>
-        <resources.name>Baeldung</resources.name>
         <jetty.version>9.4.11.v20180605</jetty.version>
         <jersey.version>2.27</jersey.version>
     </properties>

maven-polyglot/maven-polyglot-json-extension/pom.xml

@@ -47,8 +47,6 @@
     </build>
 	
     <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
         <maven-core.version>3.5.4</maven-core.version>
     </properties>
 

mesos-marathon/pom.xml

@@ -2,10 +2,8 @@
 <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>mesos-marathon</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
-	<name>mesos-marathon</name>
+    <name>mesos-marathon</name>
 	
     <parent>
         <artifactId>parent-boot-1</artifactId>

metrics/pom.xml

@@ -57,47 +57,12 @@
             <version>${micrometer.ver}</version>
         </dependency>
 
-        <dependency>
-            <groupId>io.micrometer</groupId>
-            <artifactId>micrometer-spring-legacy</artifactId>
-            <version>${micrometer.ver}</version>
-        </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
             <version>${spring-boot-starter-web.version}</version>
         </dependency>
 
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>${fasterxml.jackson.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.dataformat</groupId>
-            <artifactId>jackson-dataformat-smile</artifactId>
-            <version>${fasterxml.jackson.version}</version>
-        </dependency>
-
-        <dependency>
-            <groupId>com.netflix.spectator</groupId>
-            <artifactId>spectator-api</artifactId>
-            <version>${spectator-api.version}</version>
-        </dependency>
-
-        <dependency>
-            <groupId>io.astefanutti.metrics.aspectj</groupId>
-            <artifactId>metrics-aspectj</artifactId>
-            <version>${metrics-aspectj.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.slf4j</groupId>
-                    <artifactId>slf4j-api</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-
         <dependency>
             <groupId>io.astefanutti.metrics.aspectj</groupId>
             <artifactId>metrics-aspectj-deps</artifactId>
@@ -118,8 +83,6 @@
         <dep.ver.servlet>3.1.0</dep.ver.servlet>
         <netflix.servo.ver>0.12.17</netflix.servo.ver>
         <micrometer.ver>0.12.0.RELEASE</micrometer.ver>
-        <fasterxml.jackson.version>2.9.1</fasterxml.jackson.version>
-        <spectator-api.version>0.57.1</spectator-api.version>
 		<spring-boot-starter-web.version>2.0.7.RELEASE</spring-boot-starter-web.version>
 		<assertj-core.version>3.11.1</assertj-core.version>
         <metrics-aspectj.version>1.1.0</metrics-aspectj.version>