Merge pull request #39 from eugenp/master

update

core-java-modules/core-java-nio-2/src/main/java/com/baeldung/lock/FileLocks.java

@@ -0,0 +1,148 @@
+package com.baeldung.lock;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.channels.NonReadableChannelException;
+import java.nio.channels.NonWritableChannelException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
+public class FileLocks {
+
+    private static final Logger LOG = LoggerFactory.getLogger(FileLocks.class);
+
+    // Write locks
+
+    /**
+     * Trying to get an exclusive lock on a read-only FileChannel won't work.
+     */
+    static void getExclusiveLockFromInputStream() throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (FileInputStream fis = new FileInputStream(path.toFile());
+            FileLock lock = fis.getChannel()
+                .lock()) {
+            LOG.debug("This won't happen");
+        } catch (NonWritableChannelException e) {
+            LOG.error("The channel obtained through a FileInputStream isn't writable. You can't obtain an exclusive lock on it!");
+            throw e;
+        }
+    }
+
+    /**
+     * Gets an exclusive lock from a RandomAccessFile. Works because the file is writable.
+     * @param from beginning of the locked region
+     * @param size how many bytes to lock
+     * @return A lock object representing the newly-acquired lock
+     * @throws IOException if there is a problem creating the temporary file
+     */
+    static FileLock getExclusiveLockFromRandomAccessFile(long from, long size) throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (RandomAccessFile file = new RandomAccessFile(path.toFile(), "rw");
+            FileLock lock = file.getChannel()
+                .lock(from, size, false)) {
+            if (lock.isValid()) {
+                LOG.debug("This is a valid exclusive lock");
+                return lock;
+            }
+            return null;
+        } catch (Exception e) {
+            LOG.error(e.getMessage());
+        }
+        return null;
+    }
+
+    /**
+     * Acquires an exclusive lock on a file region.
+     * @param from beginning of the locked region
+     * @param size how many bytes to lock
+     * @return A lock object representing the newly-acquired lock
+     * @throws IOException if there is a problem creating the temporary file
+     */
+    static FileLock getExclusiveLockFromFileChannelOpen(long from, long size) throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (FileChannel channel = FileChannel.open(path, StandardOpenOption.APPEND); FileLock lock = channel.lock(from, size, false)) {
+            String text = "Hello, world.";
+            ByteBuffer buffer = ByteBuffer.allocate(text.length() + System.lineSeparator()
+                .length());
+            buffer.put((text + System.lineSeparator()).getBytes(StandardCharsets.UTF_8));
+            buffer.flip();
+            while (buffer.hasRemaining()) {
+                channel.write(buffer, channel.size());
+            }
+            LOG.debug("This was written to the file");
+            Files.lines(path)
+                .forEach(LOG::debug);
+            return lock;
+        }
+    }
+
+    // Read locks
+
+    /**
+     * Trying to get a shared lock on a write-only FileChannel won't work.
+     */
+    static void getReadLockFromOutputStream() throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (FileOutputStream fis = new FileOutputStream(path.toFile());
+            FileLock lock = fis.getChannel()
+                .lock(0, Long.MAX_VALUE, true)) {
+            LOG.debug("This won't happen");
+        } catch (NonReadableChannelException e) {
+            LOG.error("The channel obtained through a FileOutputStream isn't readable. " + "You can't obtain an shared lock on it!");
+            throw e;
+        }
+    }
+
+    /**
+     * Gets a lock from an <tt>InputStream</tt>.
+     * @param from beginning of the locked region
+     * @param size how many bytes to lock
+     * @return A lock object representing the newly-acquired lock
+     * @throws IOException if there is a problem creating the temporary file
+     */
+    static FileLock getReadLockFromInputStream(long from, long size) throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (FileInputStream fis = new FileInputStream(path.toFile());
+            FileLock lock = fis.getChannel()
+                .lock(from, size, true)) {
+            if (lock.isValid()) {
+                LOG.debug("This is a valid shared lock");
+                return lock;
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Gets an exclusive lock from a RandomAccessFile. Works because the file is readable.
+     * @param from beginning of the locked region
+     * @param size how many bytes to lock
+     * @return A lock object representing the newly-acquired lock
+     * @throws IOException if there is a problem creating the temporary file
+     */
+    static FileLock getReadLockFromRandomAccessFile(long from, long size) throws IOException {
+        Path path = Files.createTempFile("foo", "txt");
+        try (RandomAccessFile file = new RandomAccessFile(path.toFile(), "r"); // could also be "rw", but "r" is sufficient for reading
+            FileLock lock = file.getChannel()
+                .lock(from, size, true)) {
+            if (lock.isValid()) {
+                LOG.debug("This is a valid shared lock");
+                return lock;
+            }
+        } catch (Exception e) {
+            LOG.error(e.getMessage());
+        }
+        return null;
+    }
+
+}

core-java-modules/core-java-nio-2/src/test/java/com/baeldung/lock/FileLocksUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.lock;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.IOException;
+import java.nio.channels.FileLock;
+import java.nio.channels.NonReadableChannelException;
+import java.nio.channels.NonWritableChannelException;
+
+import org.junit.jupiter.api.Test;
+
+class FileLocksUnitTest {
+
+    @Test
+    void givenAnInputStream_whenGetWriteLock_thenThrowNonWritableChannelException() {
+        assertThrows(NonWritableChannelException.class, () -> FileLocks.getExclusiveLockFromInputStream());
+    }
+
+    @Test
+    void givenARandomAccessFileWithReadWriteAccess_whenGetWriteLock_thenLock() throws IOException {
+        FileLock lock = FileLocks.getExclusiveLockFromRandomAccessFile(0, 10);
+        assertNotNull(lock);
+        assertFalse(lock.isShared());
+    }
+
+    @Test
+    void givenAPath_whenGetExclusiveLock_thenLock() throws IOException {
+        FileLock lock = FileLocks.getExclusiveLockFromFileChannelOpen(0, 10);
+        assertNotNull(lock);
+        assertFalse(lock.isShared());
+    }
+
+    @Test
+    void givenAFileOutputStream_whenGetSharedLock_thenThrowNonReadableChannelException() {
+        assertThrows(NonReadableChannelException.class, FileLocks::getReadLockFromOutputStream);
+    }
+
+    @Test
+    void givenAnInputStream_whenGetSharedLock_thenLock() throws IOException {
+        FileLock lock = FileLocks.getReadLockFromInputStream(0, 10);
+        assertNotNull(lock);
+        assertTrue(lock.isShared());
+    }
+
+    @Test
+    void givenARandomAccessFile_whenGetSharedLock_thenLock() throws IOException {
+        FileLock lock = FileLocks.getReadLockFromRandomAccessFile(0, 10);
+        assertNotNull(lock);
+        assertTrue(lock.isShared());
+    }
+}

core-java-modules/core-java/README.md

@@ -11,7 +11,7 @@
 - [Introduction to Java Serialization](http://www.baeldung.com/java-serialization)
 - [Guide to UUID in Java](http://www.baeldung.com/java-uuid)
 - [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
-- [Quick Guide to Java Stack](http://www.baeldung.com/java-stack)
+- [Quick Guide to the Java Stack](http://www.baeldung.com/java-stack)
 - [Compiling Java *.class Files with javac](http://www.baeldung.com/javac)
 - [Introduction to Javadoc](http://www.baeldung.com/javadoc)
 - [Guide to the Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)

core-java-modules/core-java/src/test/java/com/baeldung/timer/JavaTimerLongRunningUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung;
+package com.baeldung.timer;
 
 import org.junit.Test;
 import org.slf4j.Logger;

core-kotlin-modules/core-kotlin-2/README.md

@@ -5,4 +5,5 @@ This module contains articles about Kotlin core features.
 ### Relevant articles:
 - [Working with Dates in Kotlin](https://www.baeldung.com/kotlin-dates)
 - [Kotlin Ternary Conditional Operator](https://www.baeldung.com/kotlin-ternary-operator)
+- [Sequences in Kotlin](https://www.baeldung.com/kotlin/sequences)
 - [[<-- Prev]](/core-kotlin-modules/core-kotlin)

core-kotlin-modules/core-kotlin/README.md

@@ -13,4 +13,7 @@ This module contains articles about Kotlin core features.
 - [Implementing a Binary Tree in Kotlin](https://www.baeldung.com/kotlin-binary-tree)
 - [JUnit 5 for Kotlin Developers](https://www.baeldung.com/junit-5-kotlin)
 - [Converting Kotlin Data Class from JSON using GSON](https://www.baeldung.com/kotlin-json-convert-data-class)
+- [Fuel HTTP Library with Kotlin](https://www.baeldung.com/kotlin-fuel)
+- [Introduction to Kovenant Library for Kotlin](https://www.baeldung.com/kotlin-kovenant)
+- [Dependency Injection for Kotlin with Injekt](https://www.baeldung.com/kotlin-dependency-injection-with-injekt)
 - [[More --> ]](/core-kotlin-modules/core-kotlin-2)

core-scala/README.md

@@ -5,3 +5,4 @@ This module contains articles about Scala's core features
 ### Relevant Articles: 
 
 - [Introduction to Scala](https://www.baeldung.com/scala-intro)
+- [Regular Expressions in Scala](https://www.baeldung.com/scala/regular-expressions)

core-scala/src/test/scala/com/baeldung/scala/HigherOrderFunctionsExamplesUnitTest.scala

@@ -0,0 +1,82 @@
+package com.baeldung.scala
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+
+class HigherOrderFunctionsExamplesUnitTest {
+
+  @Test
+  def whenCallingMapWithAnonymousFunction_thenTransformationIsApplied() = {
+    val expected = Seq("sir Alex Ferguson", "sir Bobby Charlton", "sir Frank Lampard")
+
+    val names = Seq("Alex Ferguson", "Bobby Charlton", "Frank Lampard")
+    val sirNames = names.map(name => "sir " + name)
+
+    assertEquals(expected, sirNames)
+  }
+
+  @Test
+  def whenCallingMapWithDefined_thenTransformationIsApplied() = {
+    val expected = Seq("sir Alex Ferguson", "sir Bobby Charlton", "sir Frank Lampard")
+
+    val names = Seq("Alex Ferguson", "Bobby Charlton", "Frank Lampard")
+
+    def prefixWithSir(name: String) = "sir " + name
+    val sirNames = names.map(prefixWithSir)
+
+    assertEquals(expected, sirNames)
+  }
+
+  @Test
+  def whenCallingFilter_thenUnecessaryElementsAreRemoved() = {
+    val expected = Seq("John O'Shea", "John Hartson")
+
+    val names = Seq("John O'Shea", "Aiden McGeady", "John Hartson")
+    val johns = names.filter(name => name.matches("^John .*"))
+
+    assertEquals(expected, johns)
+  }
+
+  @Test
+  def whenCallingReduce_thenProperSumIsCalculated() = {
+    val expected = 2750
+
+    val earnings = Seq(1000, 1300, 450)
+    val sumEarnings = earnings.reduce((acc, x) => acc + x)
+
+    assertEquals(expected, sumEarnings)
+  }
+
+  @Test
+  def whenCallingFold_thenNumberOfWordsShouldBeCalculated() = {
+    val expected = 6
+
+    val strings = Seq("bunch of words", "just me", "it")
+    val sumEarnings = strings.foldLeft(0)((acc, x) => acc + x.split(" ").size)
+
+    assertEquals(expected, sumEarnings)
+  }
+
+  @Test
+  def whenCallingOwnHigherOrderFunction_thenProperFunctionIsReturned() = {
+    def mathOperation(name: String): (Int, Int) => Int = (x: Int, y: Int) => {
+      name match {
+        case "addition" => x + y
+        case "multiplication" => x * y
+        case "division" => x/y
+        case "subtraction" => x - y
+      }
+    }
+
+    def add: (Int, Int) => Int = mathOperation("addition")
+    def mul: (Int, Int) => Int = mathOperation("multiplication")
+    def div: (Int, Int) => Int = mathOperation("division")
+    def sub: (Int, Int) => Int = mathOperation("subtraction")
+
+    assertEquals(15, add(10, 5))
+    assertEquals(50, mul(10, 5))
+    assertEquals(2, div(10, 5))
+    assertEquals(5, sub(10, 5))
+  }
+}

core-scala/src/test/scala/com/baeldung/scala/regex/RegexUnitTest.scala

@@ -1,4 +1,4 @@
-package com.baeldung.scala
+package com.baeldung.scala.regex
 
 import org.junit.Test
 import org.junit.Assert.assertEquals

java-numbers-3/pom.xml

@@ -14,11 +14,28 @@
     </parent>
 
     <dependencies>
-    	<dependency>
+        <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>dsiutils</artifactId>
             <version>${dsiutils.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.vavr</groupId>
+            <artifactId>vavr</artifactId>
+            <version>${vavr.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -33,6 +50,9 @@
 
     <properties>
         <dsiutils.version>2.6.0</dsiutils.version>
+        <vavr.version>0.10.2</vavr.version>
+        <commons.version>3.9</commons.version>
+        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>

java-numbers-3/src/test/java/com/baeldung/parsedouble/StringToDoubleParserUnitTest.java

@@ -0,0 +1,149 @@
+package com.baeldung.parsedouble;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Optional;
+
+import org.apache.commons.lang3.math.NumberUtils;
+import org.junit.Test;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.primitives.Doubles;
+
+import io.vavr.control.Try;
+
+public class StringToDoubleParserUnitTest {
+
+    @Test
+    public void givenNullValue_whenParseStringToDouble_thenDefaultNaNValueIsReturned() {
+        assertThat(parseStringToDouble(null)).isNaN();
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenParseStringToDouble_thenDefaultNaNValueIsReturned() {
+        assertThat(parseStringToDouble("")).isNaN();
+    }
+
+    @Test
+    public void givenStringValue_whenParseStringToDouble_thenDoubleValueIsReturned() {
+        assertThat(parseStringToDouble("1")).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenStringValue_whenParseStringToDoubleWithDefault_thenDoubleValueIsReturned() {
+        assertThat(parseStringToDouble("1", 2.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenParseStringToDoubleWithDefault_thenDefaultValueIsReturned() {
+        assertThat(parseStringToDouble("", 1.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenNullValue_whenParseStringToDoubleWithDefault_thenDefaultValueIsReturned() {
+        assertThat(parseStringToDouble(null, 1.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenStringValue_whenParseStringToOptionalDouble_thenOptionalValueIsReturned() {
+        assertThat(parseStringToOptionalDouble("1")).isEqualTo(Optional.of(1.0d));
+    }
+
+    @Test
+    public void givenNullValue_whenParseStringToOptionalDouble_thenOptionalValueIsEmpty() {
+        assertThat(parseStringToOptionalDouble(null)).isEqualTo(Optional.empty());
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenParseStringToOptionalDouble_thenOptionalValueIsEmpty() {
+        assertThat(parseStringToOptionalDouble("")).isEqualTo(Optional.empty());
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenParseStringToOptionalDouble_thenDefaulOptionalValueIsReturned() {
+        assertThat(parseStringToOptionalDouble("").orElse(1.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenNullValue_whenParseStringToOptionalDouble_thenDefaulOptionalValueIsReturned() {
+        assertThat(parseStringToOptionalDouble(null).orElse(1.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenStringValue_whenTryStringToDouble_thenDoubleValueIsReturned() {
+        assertThat(tryStringToDouble("1", 2.0d)).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenNullValue_whenTryStringToDoubleWithDefault_thenDoubleValueIsReturned() {
+        assertThat(tryStringToDouble(null, 2.0d)).isEqualTo(2.0d);
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenTryStringToDoubleWithDefault_thenDoubleValueIsReturned() {
+        assertThat(tryStringToDouble("", 2.0d)).isEqualTo(2.0d);
+    }
+
+    @Test
+    public void givenTwoStringValues_whenTryParseFirstNonNull_thenDoubleValueIsReturned() {
+        assertThat(Doubles.tryParse(MoreObjects.firstNonNull("1.0", "2.0"))).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenNullStringValue_whenTryParseFirstNonNull_thenSecondDoubleValueIsReturned() {
+        assertThat(Doubles.tryParse(MoreObjects.firstNonNull(null, "2.0"))).isEqualTo(2.0d);
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenTryParseFirstNonNull_thenNullIsReturned() {
+        assertThat(Doubles.tryParse(MoreObjects.firstNonNull("", "2.0"))).isEqualTo(null);
+    }
+
+    @Test
+    public void givenStringValue_whenToDouble_thenDoubleValueIsReturned() {
+        assertThat(NumberUtils.toDouble("1.0")).isEqualTo(1.0d);
+    }
+
+    @Test
+    public void givenNullValue_whenToDouble_thenLibraryDefaultDoubleValueIsReturned() {
+        String nullString = null;
+        assertThat(NumberUtils.toDouble(nullString)).isEqualTo(0.0d);
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenToDouble_thenLibraryDefaultDoubleValueIsReturned() {
+        assertThat(NumberUtils.toDouble("")).isEqualTo(0.0d);
+    }
+
+    @Test
+    public void givenEmptyStringValue_whenToDoubleWithDefault_thenDoubleValueIsReturned() {
+        assertThat(NumberUtils.toDouble("", 2.0d)).isEqualTo(2.0d);
+    }
+
+    @Test
+    public void givenNullValue_whenToDoubleWithDefault_thenDoubleValueIsReturned() {
+        String nullString = null;
+        assertThat(NumberUtils.toDouble(nullString, 2.0d)).isEqualTo(2.0d);
+    }
+
+    @Test
+    public void givenStringValue_whenToDoubleWithDefault_thenDoubleValueIsReturned() {
+        assertThat(NumberUtils.toDouble("1.0", 2.0d)).isEqualTo(1.0d);
+    }
+
+    private static Optional<Double> parseStringToOptionalDouble(String value) {
+        return value == null || value.isEmpty() ? Optional.empty() : Optional.of(Double.valueOf(value));
+    }
+
+    private static double parseStringToDouble(String value) {
+        return value == null || value.isEmpty() ? Double.NaN : Double.parseDouble(value);
+    }
+
+    private static double parseStringToDouble(String value, double defaultValue) {
+        return value == null || value.isEmpty() ? defaultValue : Double.parseDouble(value);
+    }
+
+    private static double tryStringToDouble(String value, double defaultValue) {
+        return Try.of(() -> Double.parseDouble(value)).getOrElse(defaultValue);
+    }
+}

lombok-custom/pom.xml

@@ -36,12 +36,12 @@
 
     <profiles>
         <profile>
-            <id>default-tools.jar</id>
+            <id>default-profile</id>
             <activation>
-                <property>
-                    <name>java.vendor</name>
-                    <value>Oracle Corporation</value>
-                </property>
+                <activeByDefault>true</activeByDefault>
+                <file>
+                    <exists>${java.home}/../lib/tools.jar</exists>
+                </file>
             </activation>
             <dependencies>
                 <dependency>
@@ -53,6 +53,24 @@
                 </dependency>
             </dependencies>
         </profile>
+        <profile>
+            <id>mac-profile</id>
+            <activation>
+                <activeByDefault>false</activeByDefault>
+                <file>
+                    <exists>${java.home}/../Classes/classes.jar</exists>
+                </file>
+            </activation>
+            <dependencies>
+                <dependency>
+                    <groupId>com.sun</groupId>
+                    <artifactId>tools</artifactId>
+                    <version>${java.version}</version>
+                    <scope>system</scope>
+                    <systemPath>${java.home}/../Classes/classes.jar</systemPath>
+                </dependency>
+            </dependencies>
+        </profile>
     </profiles>
 
     <properties>

play-framework/async-http/.g8/form/app/controllers/$model__Camel$Controller.java

@@ -0,0 +1,43 @@
+package controllers;
+
+import play.data.Form;
+import play.data.FormFactory;
+import play.mvc.Controller;
+import play.mvc.Result;
+
+import javax.inject.Inject;
+
+// Add the following to conf/routes 
+/*
+GET     /$model;format="camel"$        controllers.$model;format="Camel"$Controller.$model;format="camel"$Get
+POST    /$model;format="camel"$        controllers.$model;format="Camel"$Controller.$model;format="camel"$Post
+*/
+
+/**
+ * $model;format="Camel"$ form controller for Play Java
+ */
+public class $model;format="Camel"$Controller extends Controller {
+
+    private final Form<$model;format="Camel"$Data> $model;format="camel"$Form;
+
+    @Inject
+    public $model;format="Camel"$Controller(FormFactory formFactory) {
+        this.$model;format="camel"$Form = formFactory.form($model;format="Camel"$Data.class);
+    }
+
+    public Result $model;format="camel"$Get() {
+        return ok(views.html.$model;format="camel"$.form.render($model;format="camel"$Form));
+    }
+
+    public Result $model;format="camel"$Post() {
+        Form<$model;format="Camel"$Data> boundForm = $model;format="camel"$Form.bindFromRequest();
+        if (boundForm.hasErrors()) {
+            return badRequest(views.html.$model;format="camel"$.form.render(boundForm));
+        } else {
+            $model;format="Camel"$Data $model;format="camel"$ = boundForm.get();
+            flash("success", "$model;format="Camel"$ " + $model;format="camel"$);
+            return redirect(routes.$model;format="Camel"$Controller.$model;format="camel"$Get());
+        }
+    }
+
+}

play-framework/async-http/.g8/form/app/controllers/$model__Camel$Data.java

@@ -0,0 +1,37 @@
+package controllers;
+
+import play.data.validation.Constraints;
+
+public class $model;format="Camel"$Data {
+
+    @Constraints.Required
+    private String name;
+
+    @Constraints.Required
+    private Integer age;
+
+    public $model;format="Camel"$Data() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("$model;format="Camel"$Data(%s, %s)", name, age);
+    }
+
+}

play-framework/async-http/.g8/form/app/views/$model__camel$/form.scala.html

@@ -0,0 +1,12 @@
+@($model;format="camel"$Form: Form[$model;format="Camel"$Data])
+
+<h1>$model;format="camel"$ form</h1>
+
+@flash.getOrDefault("success", "")
+
+@helper.form(action = routes.$model;format="Camel"$Controller.$model;format="camel"$Post()) {
+  @helper.CSRF.formField
+  @helper.inputText($model;format="camel"$Form("name"))
+  @helper.inputText($model;format="camel"$Form("age"))
+  <input type="submit" value="submit"/>
+}

play-framework/async-http/.g8/form/default.properties

@@ -0,0 +1,2 @@
+description = Generates a Controller with form handling
+model = user

play-framework/async-http/.g8/form/generated-test/README.md

@@ -0,0 +1 @@
+Temporary file until g8-scaffold will generate "test" directory

play-framework/async-http/.g8/form/generated-test/controllers/$model__Camel$ControllerTest.java

@@ -0,0 +1,50 @@
+package controllers;
+
+import org.junit.Test;
+import play.Application;
+import play.filters.csrf.*;
+import play.inject.guice.GuiceApplicationBuilder;
+import play.mvc.*;
+import play.test.WithApplication;
+
+import java.util.HashMap;
+
+import static org.junit.Assert.assertEquals;
+import static play.mvc.Http.RequestBuilder;
+import static play.mvc.Http.Status.OK;
+import static play.test.Helpers.*;
+import static play.api.test.CSRFTokenHelper.*;
+
+public class $model;format="Camel"$ControllerTest extends WithApplication {
+
+    @Override
+    protected Application provideApplication() {
+        return new GuiceApplicationBuilder().build();
+    }
+
+    @Test
+    public void test$model;format="Camel"$Get() {
+        RequestBuilder request = new RequestBuilder()
+                .method(GET)
+                .uri("/$model;format="camel"$");
+
+        Result result = route(app, request);
+        assertEquals(OK, result.status());
+    }
+
+    @Test
+    public void test$model;format="Camel"$Post() {
+        HashMap<String, String> formData = new HashMap<>();
+        formData.put("name", "play");
+        formData.put("age", "4");
+        RequestBuilder request = addCSRFToken(new RequestBuilder()
+                .header(Http.HeaderNames.HOST, "localhost")
+                .method(POST)
+                .bodyForm(formData)
+                .uri("/$model;format="camel"$"));
+
+        Result result = route(app, request);
+        assertEquals(SEE_OTHER, result.status());
+    }
+
+}

play-framework/async-http/.gitignore

@@ -0,0 +1,8 @@
+logs
+target
+/.idea
+/.idea_modules
+/.classpath
+/.project
+/.settings
+/RUNNING_PID

play-framework/async-http/app/controllers/HomeController.java

@@ -0,0 +1,38 @@
+package controllers;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableMap;
+import java.util.Collections;
+import java.util.Map;
+import play.mvc.Controller;
+import play.mvc.Http;
+import play.mvc.Result;
+
+/**
+ * This controller contains an action to handle HTTP requests to the application's home page.
+ */
+public class HomeController extends Controller {
+
+    /**
+     * An action that renders an HTML page with a welcome message. The configuration in the
+     * <code>routes</code> file means that this method will be called when the application receives
+     * a
+     * <code>GET</code> request with a path of <code>/</code>.
+     */
+    public Result index(Http.Request request) throws JsonProcessingException {
+        return ok(printStats(request));
+    }
+
+    private String printStats(Http.Request request) throws JsonProcessingException {
+        Map<String, String[]> stringMap = request.body()
+                                                 .asFormUrlEncoded();
+        Map<String, Object> map = ImmutableMap.of(
+          "Result", "ok",
+          "GetParams", request.queryString(),
+          "PostParams", stringMap == null ? Collections.emptyMap() : stringMap,
+          "Headers", request.getHeaders().toMap()
+        );
+        return new ObjectMapper().writerWithDefaultPrettyPrinter().writeValueAsString(map);
+    }
+}

play-framework/async-http/app/views/index.scala.html

@@ -0,0 +1,5 @@
+@()
+
+@main("Welcome to Play") {
+  <h1>Welcome to Play!</h1>
+}

play-framework/async-http/app/views/main.scala.html

@@ -0,0 +1,24 @@
+@*
+ * This template is called from the `index` template. This template
+ * handles the rendering of the page header and body tags. It takes
+ * two arguments, a `String` for the title of the page and an `Html`
+ * object to insert into the body of the page.
+ *@
+@(title: String)(content: Html)
+
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        @* Here's where we render the page title `String`. *@
+        <title>@title</title>
+        <link rel="stylesheet" media="screen" href="@routes.Assets.versioned("stylesheets/main.css")">
+        <link rel="shortcut icon" type="image/png" href="@routes.Assets.versioned("images/favicon.png")">
+    </head>
+    <body>
+        @* And here's where we render the `Html` object containing
+         * the page content. *@
+        @content
+
+        <script src="@routes.Assets.versioned("javascripts/main.js")" type="text/javascript"></script>
+    </body>
+</html>

play-framework/async-http/build.sbt

@@ -0,0 +1,12 @@
+name := """async"""
+organization := "com.example"
+
+version := "1.0-SNAPSHOT"
+
+lazy val root = (project in file(".")).enablePlugins(PlayJava)
+
+scalaVersion := "2.13.1"
+
+// comment out the original line
+libraryDependencies += guice
+libraryDependencies += javaWs

play-framework/async-http/conf/application.conf

@@ -0,0 +1,11 @@
+# This is the main configuration file for the application.
+# https://www.playframework.com/documentation/latest/ConfigFile
+play.ws.followRedirects=false
+play.ws.useragent=MyPlayApplication
+play.ws.compressionEnabled=true
+# time to wait for the connection to be established
+play.ws.timeout.connection=30.seconds
+# time to wait for data after the connection is open
+play.ws.timeout.idle=30.seconds
+# max time available to complete the request
+play.ws.timeout.request=300.seconds

play-framework/async-http/conf/logback.xml

@@ -0,0 +1,36 @@
+<!-- https://www.playframework.com/documentation/latest/SettingsLogger -->
+<configuration>
+
+  <conversionRule conversionWord="coloredLevel" converterClass="play.api.libs.logback.ColoredLevel" />
+
+  <appender name="FILE" class="ch.qos.logback.core.FileAppender">
+    <file>${application.home:-.}/logs/application.log</file>
+    <encoder>
+      <pattern>%date [%level] from %logger in %thread - %message%n%xException</pattern>
+    </encoder>
+  </appender>
+
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%coloredLevel %logger{15} - %message%n%xException{10}</pattern>
+    </encoder>
+  </appender>
+
+  <appender name="ASYNCFILE" class="ch.qos.logback.classic.AsyncAppender">
+    <appender-ref ref="FILE" />
+  </appender>
+
+  <appender name="ASYNCSTDOUT" class="ch.qos.logback.classic.AsyncAppender">
+    <appender-ref ref="STDOUT" />
+  </appender>
+
+  <logger name="play" level="INFO" />
+  <logger name="application" level="DEBUG" />
+  <logger name="controllers" level="DEBUG" />
+
+  <root level="WARN">
+    <appender-ref ref="ASYNCFILE" />
+    <appender-ref ref="ASYNCSTDOUT" />
+  </root>
+
+</configuration>

play-framework/async-http/conf/routes

@@ -0,0 +1,10 @@
+# Routes
+# This file defines all application routes (Higher priority routes first)
+# ~~~~
+
+# An example controller showing a sample home page
+GET     /                           controllers.HomeController.index(request: Request)
+POST     /                           controllers.HomeController.index(request: Request)
+
+# Map static resources from the /public folder to the /assets URL path
+GET     /assets/*file               controllers.Assets.versioned(path="/public", file: Asset)

play-framework/async-http/project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.3.3

play-framework/async-http/project/plugins.sbt

@@ -0,0 +1,7 @@
+// The Play plugin
+addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.7.3")
+
+// Defines scaffolding (found under .g8 folder)
+// http://www.foundweekends.org/giter8/scaffolding.html
+// sbt "g8Scaffold form"
+addSbtPlugin("org.foundweekends.giter8" % "sbt-giter8-scaffold" % "0.11.0")

play-framework/async-http/test/controllers/HomeControllerTest.java

@@ -0,0 +1,232 @@
+package controllers;
+
+import static java.time.temporal.ChronoUnit.SECONDS;
+import static org.junit.Assert.assertEquals;
+import static play.mvc.Http.Status.SERVICE_UNAVAILABLE;
+
+import akka.Done;
+import akka.actor.ActorSystem;
+import akka.stream.ActorMaterializer;
+import akka.stream.javadsl.Sink;
+import akka.util.ByteString;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Duration;
+import java.util.OptionalInt;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.stream.IntStream;
+import org.apache.http.HttpStatus;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import play.Application;
+import play.inject.guice.GuiceApplicationBuilder;
+import play.libs.concurrent.Futures;
+import play.libs.ws.WSClient;
+import play.libs.ws.WSResponse;
+import play.libs.ws.ahc.AhcCurlRequestLogger;
+import play.mvc.Result;
+import play.mvc.Results;
+import play.test.WithServer;
+
+public class HomeControllerTest extends WithServer {
+
+    private final Logger log = LoggerFactory.getLogger(HomeControllerTest.class);
+    private String url;
+    private int port;
+
+    @Override
+    protected Application provideApplication() {
+        return new GuiceApplicationBuilder().build();
+    }
+
+    @Before
+    public void setup() {
+        OptionalInt optHttpsPort = testServer.getRunningHttpsPort();
+        if (optHttpsPort.isPresent()) {
+            port = optHttpsPort.getAsInt();
+            url = "https://localhost:" + port;
+        } else {
+            port = testServer.getRunningHttpPort()
+                             .getAsInt();
+            url = "http://localhost:" + port;
+        }
+    }
+
+    @Test
+    public void givenASingleGetRequestWhenResponseThenBlockWithCompletableAndLog()
+      throws Exception {
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        WSResponse wsResponse = ws.url(url)
+                                  .setRequestFilter(new AhcCurlRequestLogger())
+                                  .addHeader("key", "value")
+                                  .addQueryParameter("num", "" + 1)
+                                  .get()
+                                  .toCompletableFuture()
+                                  .get();
+
+        log.debug("Thread#" + Thread.currentThread()
+                                    .getId() + " Request complete: Response code = "
+          + wsResponse.getStatus()
+          + " | Response: " + wsResponse.getBody() + " | Current Time:"
+          + System.currentTimeMillis());
+        assert (HttpStatus.SC_OK == wsResponse.getStatus());
+    }
+
+    @Test
+    public void givenASingleGetRequestWhenResponseThenLog() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        ws.url(url)
+          .setRequestFilter(new AhcCurlRequestLogger())
+          .addHeader("key", "value")
+          .addQueryParameter("num", "" + 1)
+          .get()
+          .thenAccept(r -> {
+              log.debug("Thread#" + Thread.currentThread()
+                                          .getId() + " Request complete: Response code = "
+                + r.getStatus()
+                + " | Response: " + r.getBody() + " | Current Time:" + System.currentTimeMillis());
+              latch.countDown();
+          });
+
+        log.debug(
+          "Waiting for requests to be completed. Current Time: " + System.currentTimeMillis());
+        latch.await(5, TimeUnit.SECONDS );
+        assertEquals(0, latch.getCount());
+        log.debug("All requests have been completed. Exiting test.");
+    }
+
+    @Test
+    public void givenASinglePostRequestWhenResponseThenLog() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        ws.url(url)
+          .setContentType("application/x-www-form-urlencoded")
+          .post("key1=value1&key2=value2")
+          .thenAccept(r -> {
+              log.debug("Thread#" + Thread.currentThread()
+                                          .getId() + " Request complete: Response code = "
+                + r.getStatus()
+                + " | Response: " + r.getBody() + " | Current Time:" + System.currentTimeMillis());
+              latch.countDown();
+          });
+
+        log.debug(
+          "Waiting for requests to be completed. Current Time: " + System.currentTimeMillis());
+        latch.await(5, TimeUnit.SECONDS );
+        assertEquals(0, latch.getCount());
+        log.debug("All requests have been completed. Exiting test.");
+    }
+
+    @Test
+    public void givenMultipleRequestsWhenResponseThenLog() throws Exception {
+        CountDownLatch latch = new CountDownLatch(100);
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        IntStream.range(0, 100)
+                 .parallel()
+                 .forEach(num ->
+                   ws.url(url)
+                     .setRequestFilter(new AhcCurlRequestLogger())
+                     .addHeader("key", "value")
+                     .addQueryParameter("num", "" + num)
+                     .get()
+                     .thenAccept(r -> {
+                         log.debug(
+                           "Thread#" + num + " Request complete: Response code = " + r.getStatus()
+                             + " | Response: " + r.getBody() + " | Current Time:"
+                             + System.currentTimeMillis());
+                         latch.countDown();
+                     })
+                 );
+
+        log.debug(
+          "Waiting for requests to be completed. Current Time: " + System.currentTimeMillis());
+        latch.await(5, TimeUnit.SECONDS );
+        assertEquals(0, latch.getCount());
+        log.debug("All requests have been completed. Exiting test.");
+    }
+
+    @Test
+    public void givenLongResponseWhenTimeoutThenHandle() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        Futures futures = app.injector()
+                             .instanceOf(Futures.class);
+        CompletionStage<Result> f = futures.timeout(
+          ws.url(url)
+            .setRequestTimeout(Duration.of(1, SECONDS))
+            .get()
+            .thenApply(result -> {
+                try {
+                    Thread.sleep(2000L);
+                    return Results.ok();
+                } catch (InterruptedException e) {
+                    return Results.status(
+                      SERVICE_UNAVAILABLE);
+                }
+            }), 1L, TimeUnit.SECONDS
+        );
+        CompletionStage<Object> res = f.handleAsync((result, e) -> {
+            if (e != null) {
+                log.error("Exception thrown", e);
+                latch.countDown();
+                return e.getCause();
+            } else {
+                return result;
+            }
+        });
+        res.thenAccept(result -> assertEquals(TimeoutException.class, result));
+
+        log.debug(
+          "Waiting for requests to be completed. Current Time: " + System.currentTimeMillis());
+        latch.await(5, TimeUnit.SECONDS );
+        assertEquals(0, latch.getCount());
+        log.debug("All requests have been completed. Exiting test.");
+    }
+
+    @Test
+    public void givenMultigigabyteResponseConsumeWithStreams() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        final ActorSystem system = ActorSystem.create();
+        final ActorMaterializer materializer = ActorMaterializer.create(system);
+        final Path path = Files.createTempFile("tmp_", ".out");
+
+        WSClient ws = play.test.WSTestClient.newClient(port);
+        log.info("Starting test server on url: " + url);
+        ws.url(url)
+          .stream()
+          .thenAccept(
+            response -> {
+                try {
+                    OutputStream outputStream = java.nio.file.Files.newOutputStream(path);
+                    Sink<ByteString, CompletionStage<Done>> outputWriter =
+                      Sink.foreach(bytes -> {
+                          log.info("Reponse: " + bytes.utf8String());
+                          outputStream.write(bytes.toArray());
+                      });
+
+                    response.getBodyAsSource()
+                            .runWith(outputWriter, materializer);
+
+                } catch (IOException e) {
+                    log.error("An error happened while opening the output stream", e);
+                }
+            })
+          .whenComplete((value, error) -> latch.countDown());
+
+        log.debug(
+          "Waiting for requests to be completed. Current Time: " + System.currentTimeMillis());
+        latch.await(5, TimeUnit.SECONDS );
+        assertEquals(0, latch.getCount());
+        log.debug("All requests have been completed. Exiting test.");
+    }
+}

pom.xml

@@ -639,7 +639,6 @@
                 <module>spring-batch</module>
                 <module>spring-bom</module>
                 <module>spring-boot-modules</module>
-                <module>spring-boot-parent</module>
                 <module>spring-boot-rest</module>
               
                 <module>spring-caching</module>
@@ -1141,7 +1140,6 @@
                 <module>spring-batch</module>
                 <module>spring-bom</module>
                 <module>spring-boot-modules</module>
-                <module>spring-boot-parent</module>
                 <module>spring-boot-rest</module>
 
                 <module>spring-caching</module>

spring-amqp/src/main/java/com/baeldung/springamqp/exponentialbackoff/ExponentialBackoffApp.java

@@ -0,0 +1,11 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ExponentialBackoffApp {
+    public static void main(String[] args) {
+        SpringApplication.run(ExponentialBackoffApp.class, args);
+    }
+}

spring-amqp/src/main/java/com/baeldung/springamqp/exponentialbackoff/ObservableRejectAndDontRequeueRecoverer.java

@@ -0,0 +1,21 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.rabbit.retry.RejectAndDontRequeueRecoverer;
+
+public class ObservableRejectAndDontRequeueRecoverer extends RejectAndDontRequeueRecoverer {
+    private Runnable observer;
+
+    @Override
+    public void recover(Message message, Throwable cause) {
+        if(observer != null) {
+            observer.run();
+        }
+        
+        super.recover(message, cause);
+    }
+    
+    void setObserver(Runnable observer){
+        this.observer = observer;
+    }
+}

spring-amqp/src/main/java/com/baeldung/springamqp/exponentialbackoff/RabbitConfiguration.java

@@ -0,0 +1,162 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import org.aopalliance.aop.Advice;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.amqp.core.AmqpAdmin;
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.core.MessageProperties;
+import org.springframework.amqp.core.Queue;
+import org.springframework.amqp.core.QueueBuilder;
+import org.springframework.amqp.rabbit.annotation.EnableRabbit;
+import org.springframework.amqp.rabbit.annotation.RabbitListener;
+import org.springframework.amqp.rabbit.config.RetryInterceptorBuilder;
+import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
+import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
+import org.springframework.amqp.rabbit.connection.ConnectionFactory;
+import org.springframework.amqp.rabbit.core.RabbitAdmin;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.retry.interceptor.RetryOperationsInterceptor;
+
+import com.rabbitmq.client.Channel;
+
+@EnableRabbit
+@Configuration
+public class RabbitConfiguration {
+
+    private static Logger logger = LoggerFactory.getLogger(RabbitConfiguration.class);
+
+    @Bean
+    public ConnectionFactory connectionFactory() {
+        return new CachingConnectionFactory("localhost");
+    }
+
+    @Bean
+    public AmqpAdmin amqpAdmin() {
+        return new RabbitAdmin(connectionFactory());
+    }
+
+    @Bean
+    public RabbitTemplate rabbitTemplate() {
+        return new RabbitTemplate(connectionFactory());
+    }
+
+    @Bean
+    public Queue blockingQueue() {
+        return QueueBuilder.nonDurable("blocking-queue")
+            .build();
+    }
+
+    @Bean
+    public Queue nonBlockingQueue() {
+        return QueueBuilder.nonDurable("non-blocking-queue")
+            .build();
+    }
+
+    @Bean
+    public Queue retryWaitEndedQueue() {
+        return QueueBuilder.nonDurable("retry-wait-ended-queue")
+            .build();
+    }
+
+    @Bean
+    public Queue retryQueue1() {
+        return QueueBuilder.nonDurable("retry-queue-1")
+            .deadLetterExchange("")
+            .deadLetterRoutingKey("retry-wait-ended-queue")
+            .build();
+    }
+
+    @Bean
+    public Queue retryQueue2() {
+        return QueueBuilder.nonDurable("retry-queue-2")
+            .deadLetterExchange("")
+            .deadLetterRoutingKey("retry-wait-ended-queue")
+            .build();
+    }
+
+    @Bean
+    public Queue retryQueue3() {
+        return QueueBuilder.nonDurable("retry-queue-3")
+            .deadLetterExchange("")
+            .deadLetterRoutingKey("retry-wait-ended-queue")
+            .build();
+    }
+
+    @Bean
+    public RetryQueues retryQueues() {
+        return new RetryQueues(1000, 3.0, 10000, retryQueue1(), retryQueue2(), retryQueue3());
+    }
+
+    @Bean
+    public ObservableRejectAndDontRequeueRecoverer observableRecoverer() {
+        return new ObservableRejectAndDontRequeueRecoverer();
+    }
+
+    @Bean
+    public RetryOperationsInterceptor retryInterceptor() {
+        return RetryInterceptorBuilder.stateless()
+            .backOffOptions(1000, 3.0, 10000)
+            .maxAttempts(5)
+            .recoverer(observableRecoverer())
+            .build();
+    }
+
+    @Bean
+    public RetryQueuesInterceptor retryQueuesInterceptor(RabbitTemplate rabbitTemplate, RetryQueues retryQueues) {
+        return new RetryQueuesInterceptor(rabbitTemplate, retryQueues);
+    }
+
+    @Bean
+    public SimpleRabbitListenerContainerFactory defaultContainerFactory(ConnectionFactory connectionFactory) {
+        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
+        factory.setConnectionFactory(connectionFactory);
+
+        return factory;
+    }
+
+    @Bean
+    public SimpleRabbitListenerContainerFactory retryContainerFactory(ConnectionFactory connectionFactory, RetryOperationsInterceptor retryInterceptor) {
+        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
+        factory.setConnectionFactory(connectionFactory);
+
+        Advice[] adviceChain = { retryInterceptor };
+        factory.setAdviceChain(adviceChain);
+
+        return factory;
+    }
+
+    @Bean
+    public SimpleRabbitListenerContainerFactory retryQueuesContainerFactory(ConnectionFactory connectionFactory, RetryQueuesInterceptor retryInterceptor) {
+        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
+        factory.setConnectionFactory(connectionFactory);
+
+        Advice[] adviceChain = { retryInterceptor };
+        factory.setAdviceChain(adviceChain);
+
+        return factory;
+    }
+
+    @RabbitListener(queues = "blocking-queue", containerFactory = "retryContainerFactory")
+    public void consumeBlocking(String payload) throws Exception {
+        logger.info("Processing message from blocking-queue: {}", payload);
+
+        throw new Exception("exception occured!");
+    }
+
+    @RabbitListener(queues = "non-blocking-queue", containerFactory = "retryQueuesContainerFactory", ackMode = "MANUAL")
+    public void consumeNonBlocking(String payload) throws Exception {
+        logger.info("Processing message from non-blocking-queue: {}", payload);
+
+        throw new Exception("Error occured!");
+    }
+
+    @RabbitListener(queues = "retry-wait-ended-queue", containerFactory = "defaultContainerFactory")
+    public void consumeRetryWaitEndedMessage(String payload, Message message, Channel channel) throws Exception {
+        MessageProperties props = message.getMessageProperties();
+
+        rabbitTemplate().convertAndSend(props.getHeader("x-original-exchange"), props.getHeader("x-original-routing-key"), message);
+    }
+}

spring-amqp/src/main/java/com/baeldung/springamqp/exponentialbackoff/RetryQueues.java

@@ -0,0 +1,34 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import org.springframework.amqp.core.Queue;
+
+public class RetryQueues {
+    private Queue[] queues;
+    private long initialInterval;
+    private double factor;
+    private long maxWait;
+
+    public RetryQueues(long initialInterval, double factor, long maxWait, Queue... queues) {
+        this.queues = queues;
+        this.initialInterval = initialInterval;
+        this.factor = factor;
+        this.maxWait = maxWait;
+    }
+
+    public boolean retriesExhausted(int retry) {
+        return retry >= queues.length;
+    }
+
+    public String getQueueName(int retry) {
+        return queues[retry].getName();
+    }
+
+    public long getTimeToWait(int retry) {
+        double time = initialInterval * Math.pow(factor, (double) retry);
+        if (time > maxWait) {
+            return maxWait;
+        }
+
+        return (long) time;
+    }
+}

spring-amqp/src/main/java/com/baeldung/springamqp/exponentialbackoff/RetryQueuesInterceptor.java

@@ -0,0 +1,109 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+
+import com.rabbitmq.client.Channel;
+
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+import org.springframework.amqp.core.Message;
+import org.springframework.amqp.core.MessageProperties;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+
+public class RetryQueuesInterceptor implements MethodInterceptor {
+
+    private RabbitTemplate rabbitTemplate;
+
+    private RetryQueues retryQueues;
+
+    private Runnable observer;
+
+    public RetryQueuesInterceptor(RabbitTemplate rabbitTemplate, RetryQueues retryQueues) {
+        this.rabbitTemplate = rabbitTemplate;
+        this.retryQueues = retryQueues;
+    }
+
+    @Override
+    public Object invoke(MethodInvocation invocation) throws Throwable {
+        return tryConsume(invocation, this::ack, (mac, e) -> {
+            try {
+                int retryCount = tryGetRetryCountOrFail(mac, e);
+                sendToNextRetryQueue(mac, retryCount);
+            } catch (Throwable t) {
+                if (observer != null) {
+                    observer.run();
+                }
+
+                throw new RuntimeException(t);
+            }
+        });
+    }
+
+    void setObserver(Runnable observer) {
+        this.observer = observer;
+    }
+
+    private Object tryConsume(MethodInvocation invocation, Consumer<MessageAndChannel> successHandler, BiConsumer<MessageAndChannel, Throwable> errorHandler) throws Throwable {
+        MessageAndChannel mac = new MessageAndChannel((Message) invocation.getArguments()[1], (Channel) invocation.getArguments()[0]);
+        Object ret = null;
+        try {
+            ret = invocation.proceed();
+            successHandler.accept(mac);
+        } catch (Throwable e) {
+            errorHandler.accept(mac, e);
+        }
+        return ret;
+    }
+
+    private void ack(MessageAndChannel mac) {
+        try {
+            mac.channel.basicAck(mac.message.getMessageProperties()
+                .getDeliveryTag(), false);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private int tryGetRetryCountOrFail(MessageAndChannel mac, Throwable originalError) throws Throwable {
+        MessageProperties props = mac.message.getMessageProperties();
+
+        String xRetriedCountHeader = (String) props.getHeader("x-retried-count");
+        final int xRetriedCount = xRetriedCountHeader == null ? 0 : Integer.valueOf(xRetriedCountHeader);
+
+        if (retryQueues.retriesExhausted(xRetriedCount)) {
+            mac.channel.basicReject(props.getDeliveryTag(), false);
+
+            throw originalError;
+        }
+
+        return xRetriedCount;
+    }
+
+    private void sendToNextRetryQueue(MessageAndChannel mac, int retryCount) throws Exception {
+        String retryQueueName = retryQueues.getQueueName(retryCount);
+
+        rabbitTemplate.convertAndSend(retryQueueName, mac.message, m -> {
+            MessageProperties props = m.getMessageProperties();
+            props.setExpiration(String.valueOf(retryQueues.getTimeToWait(retryCount)));
+            props.setHeader("x-retried-count", String.valueOf(retryCount + 1));
+            props.setHeader("x-original-exchange", props.getReceivedExchange());
+            props.setHeader("x-original-routing-key", props.getReceivedRoutingKey());
+
+            return m;
+        });
+
+        mac.channel.basicReject(mac.message.getMessageProperties()
+            .getDeliveryTag(), false);
+    }
+
+    private class MessageAndChannel {
+        private Message message;
+        private Channel channel;
+
+        private MessageAndChannel(Message message, Channel channel) {
+            this.message = message;
+            this.channel = channel;
+        }
+    }
+}

spring-amqp/src/test/java/com/baeldung/springamqp/exponentialbackoff/ExponentialBackoffLiveTest.java

@@ -0,0 +1,58 @@
+package com.baeldung.springamqp.exponentialbackoff;
+
+import java.util.concurrent.CountDownLatch;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * This live test requires:
+ * 
+ * - A running RabbitMQ instance on localhost (e.g. docker run -p 5672:5672 -p 15672:15672 --name rabbit rabbitmq:3-management)
+ * 
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { RabbitConfiguration.class })
+public class ExponentialBackoffLiveTest {
+
+    @Autowired
+    private RabbitTemplate rabbitTemplate;
+
+    @Autowired
+    private ObservableRejectAndDontRequeueRecoverer observableRecoverer;
+
+    @Autowired
+    private RetryQueuesInterceptor retryQueues;
+
+    @Test
+    public void whenSendToBlockingQueue_thenAllMessagesProcessed() throws Exception {
+        int nb = 2;
+
+        CountDownLatch latch = new CountDownLatch(nb);
+        observableRecoverer.setObserver(() -> latch.countDown());
+
+        for (int i = 1; i <= nb; i++) {
+            rabbitTemplate.convertAndSend("blocking-queue", "blocking message " + i);
+        }
+
+        latch.await();
+    }
+
+    @Test
+    public void whenSendToNonBlockingQueue_thenAllMessageProcessed() throws Exception {
+        int nb = 2;
+
+        CountDownLatch latch = new CountDownLatch(nb);
+        retryQueues.setObserver(() -> latch.countDown());
+
+        for (int i = 1; i <= nb; i++) {
+            rabbitTemplate.convertAndSend("non-blocking-queue", "non-blocking message " + i);
+        }
+
+        latch.await();
+    }
+}

spring-amqp/src/test/resources/logback-test.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+	<include
+		resource="org/springframework/boot/logging/logback/base.xml" />
+	<logger name="org.springframework" level="INFO" />
+</configuration>

spring-boot-modules/pom.xml

@@ -43,6 +43,7 @@
         <module>spring-boot-mvc-2</module>
         <module>spring-boot-mvc-birt</module>
         <module>spring-boot-nashorn</module>
+        <module>spring-boot-parent</module>
         <module>spring-boot-performance</module>
         <module>spring-boot-properties</module>
         <module>spring-boot-property-exp</module>

spring-boot-modules/spring-boot-mvc-2/src/main/java/com/baeldung/swagger2boot/config/Swagger2Config.java

@@ -16,11 +16,12 @@ import springfox.documentation.swagger2.annotations.EnableSwagger2WebMvc;
 public class Swagger2Config {
     @Bean
     public Docket api() {
-        return new Docket(DocumentationType.SWAGGER_2).select()
-            .apis(RequestHandlerSelectors.basePackage("com.baeldung.swagger2boot.controller"))
-            .paths(PathSelectors.regex("/.*"))
-            .build()
-            .apiInfo(apiEndPointsInfo());
+        return new Docket(DocumentationType.SWAGGER_2)
+                .select()
+                .apis(RequestHandlerSelectors.any())
+                .paths(PathSelectors.any())
+                .build()
+                .apiInfo(apiEndPointsInfo());
     }
 
     private ApiInfo apiEndPointsInfo() {

spring-boot-modules/spring-boot-mvc-2/src/main/java/com/baeldung/swagger2boot/controller/UserController.java

@@ -0,0 +1,39 @@
+package com.baeldung.swagger2boot.controller;
+
+import com.baeldung.swagger2boot.model.Foo;
+import com.baeldung.swagger2boot.model.User;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiImplicitParams;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import javax.websocket.server.PathParam;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
+
+@Controller
+public class UserController {
+
+    public UserController() {
+        super();
+    } //@formatter:off
+
+    @RequestMapping(method = RequestMethod.POST, value = "/createUser", produces = "application/json; charset=UTF-8")
+    @ResponseStatus(HttpStatus.CREATED)
+    @ResponseBody
+    @ApiOperation(value = "Create user",
+            notes = "This method creates a new user")
+    public User createUser(@ApiParam(
+                    name =  "firstName",
+                    type = "String",
+                    value = "First Name of the user",
+                    example = "Vatsal",
+                    required = true) @RequestParam String firstName) { //@formatter:on
+        User user = new User(firstName);
+        return user;
+    }
+}

spring-boot-modules/spring-boot-mvc-2/src/main/java/com/baeldung/swagger2boot/model/User.java

@@ -0,0 +1,28 @@
+package com.baeldung.swagger2boot.model;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+@ApiModel
+public class User {
+
+    @ApiModelProperty(value = "first name of the user", name = "firstName", dataType = "String", example = "Vatsal")
+    String firstName;
+
+    public User() {
+        super();
+    }
+
+    public User(final String firstName) {
+        super();
+        this.firstName = firstName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+}

spring-boot-modules/spring-boot-parent/pom.xml

@@ -10,10 +10,9 @@
     <description>spring-boot-parent</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
-        <relativePath>..</relativePath>
     </parent>
 
     <modules>

spring-boot-rest/src/main/java/com/baeldung/requestresponsebody/ExamplePostController.java

@@ -1,11 +1,11 @@
 package com.baeldung.requestresponsebody;
 
 import com.baeldung.services.ExampleService;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -34,4 +34,18 @@ public class ExamplePostController {
         log.debug("POST received - serializing LoginForm: " + loginForm.getPassword() + " " + loginForm.getUsername());
         return new ResponseTransfer("Thanks For Posting!!!");
     }
+
+    @PostMapping(value = "/content", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public ResponseTransfer postResponseJsonContent(@RequestBody LoginForm loginForm) {
+        log.debug("POST received - serializing LoginForm: " + loginForm.getPassword() + " " + loginForm.getUsername());
+        return new ResponseTransfer("JSON Content!");
+    }
+
+    @PostMapping(value = "/content", produces = MediaType.APPLICATION_XML_VALUE)
+    @ResponseBody
+    public ResponseTransfer postResponseXmlContent(@RequestBody LoginForm loginForm) {
+        log.debug("POST received - serializing LoginForm: " + loginForm.getPassword() + " " + loginForm.getUsername());
+        return new ResponseTransfer("XML Content!");
+    }
 }

spring-cloud-bus/spring-cloud-config-client/src/test/java/com/baeldung/SpringContextLiveTest.java

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

spring-cloud-bus/spring-cloud-config-server/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud-data-flow/batch-job/pom.xml

@@ -2,7 +2,7 @@
 <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>org.baeldung.spring.cloud</groupId>
+    <groupId>com.baeldung.spring.cloud</groupId>
     <artifactId>batch-job</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>batch-job</name>

spring-cloud-data-flow/batch-job/src/main/java/com/baeldung/spring/cloud/BatchJobApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-cloud-data-flow/batch-job/src/main/java/com/baeldung/spring/cloud/JobConfiguration.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;

spring-cloud-data-flow/batch-job/src/test/java/com/baeldung/SpringContextTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.JobConfiguration;
+import com.baeldung.spring.cloud.JobConfiguration;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud-data-flow/batch-job/src/test/java/com/baeldung/spring/cloud/BatchJobApplicationIntegrationTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/data-flow-server/src/main/java/com/baeldung/spring/cloud/DataFlowServerApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/data-flow-server/src/test/java/com/baeldung/SpringContextTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.DataFlowServerApplication;
+import com.baeldung.spring.cloud.DataFlowServerApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/data-flow-server/src/test/java/com/baeldung/spring/cloud/DataFlowServerApplicationIntegrationTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/data-flow-shell/src/main/java/com/baeldung/spring/cloud/DataFlowShellApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/data-flow-shell/src/test/java/com/baeldung/SpringContextLiveTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.DataFlowShellApplication;
+import com.baeldung.spring.cloud.DataFlowShellApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/src/main/java/com/baeldung/spring/cloud/LogSinkApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/src/test/java/com/baeldung/SpringContextTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.LogSinkApplication;
+import com.baeldung.spring.cloud.LogSinkApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/src/main/java/com/baeldung/spring/cloud/TimeProcessorApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/src/test/java/com/baeldung/SpringContextTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.TimeProcessorApplication;
+import com.baeldung.spring.cloud.TimeProcessorApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/src/main/java/com/baeldung/spring/cloud/TimeSourceApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung.spring.cloud;
+package com.baeldung.spring.cloud;
 
 import java.util.Date;
 

spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/src/test/java/com/baeldung/SpringContextTest.java

@@ -1,6 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
-import org.baeldung.spring.cloud.TimeSourceApplication;
+import com.baeldung.spring.cloud.TimeSourceApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud/spring-cloud-archaius/basic-config/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-archaius/extra-configs/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-bootstrap/config/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-bootstrap/discovery/src/test/java/com/baeldung/SpringContextLiveTest.java

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

spring-cloud/spring-cloud-bootstrap/gateway/src/test/java/com/baeldung/SpringContextLiveTest.java

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

spring-cloud/spring-cloud-bootstrap/svc-book/src/test/java/com/baeldung/SpringContextLiveTest.java

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

spring-cloud/spring-cloud-bootstrap/svc-rating/src/test/java/com/baeldung/SpringContextLiveTest.java

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

spring-cloud/spring-cloud-bootstrap/zipkin/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-consul/pom.xml

@@ -2,7 +2,7 @@
 <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
          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>org.baeldung</groupId>
+    <groupId>com.baeldung</groupId>
     <artifactId>spring-cloud-consul</artifactId>
     <name>spring-cloud-consul</name>
     <packaging>jar</packaging>

spring-cloud/spring-cloud-contract/spring-cloud-contract-consumer/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-contract/spring-cloud-contract-producer/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-kubernetes/kubernetes-guide/client-service/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-kubernetes/kubernetes-minikube/demo-backend/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-kubernetes/kubernetes-minikube/demo-frontend/src/test/java/com/baeldung/SpringContextTest.java

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

spring-cloud/spring-cloud-rest/pom.xml

@@ -2,7 +2,7 @@
 <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
          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>org.baeldung</groupId>
+    <groupId>com.baeldung</groupId>
     <artifactId>spring-cloud-rest</artifactId>
     <version>1.0.0-SNAPSHOT</version>
     <name>spring-cloud-rest</name>

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/pom.xml

@@ -2,7 +2,7 @@
 <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>org.baeldung</groupId>
+    <groupId>com.baeldung</groupId>
     <artifactId>spring-cloud-rest-books-api</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>spring-cloud-rest-books-api</name>

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/main/java/com/baeldung/BooksApiApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung;
+package com.baeldung;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/main/java/com/baeldung/SessionConfig.java

@@ -1,4 +1,4 @@
-package org.baeldung;
+package com.baeldung;
 
 import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
 import org.springframework.session.web.context.AbstractHttpSessionApplicationInitializer;

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/main/java/com/baeldung/persistence/dao/BookRepository.java

@@ -1,6 +1,6 @@
-package org.baeldung.persistence.dao;
+package com.baeldung.persistence.dao;
 
-import org.baeldung.persistence.model.Book;
+import com.baeldung.persistence.model.Book;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.repository.CrudRepository;

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/main/java/com/baeldung/persistence/model/Book.java

@@ -1,4 +1,4 @@
-package org.baeldung.persistence.model;
+package com.baeldung.persistence.model;
 
 import javax.persistence.Column;
 import javax.persistence.Entity;

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/test/java/com/baeldung/BooksApiIntegrationTest.java

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

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/test/java/com/baeldung/RestApiLiveTest.java

@@ -1,14 +1,16 @@
-package org.baeldung;
+package com.baeldung;
 
 import static io.restassured.RestAssured.preemptive;
 import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
 import static org.apache.commons.lang3.RandomStringUtils.randomNumeric;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+
+import com.baeldung.BooksApiApplication;
 import io.restassured.RestAssured;
 import io.restassured.response.Response;
 
-import org.baeldung.persistence.model.Book;
+import com.baeldung.persistence.model.Book;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/test/java/com/baeldung/SessionLiveTest.java

@@ -1,7 +1,10 @@
-package org.baeldung;
+package com.baeldung;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+
+import com.baeldung.BooksApiApplication;
+import com.baeldung.SessionConfig;
 import io.restassured.RestAssured;
 import io.restassured.response.Response;
 

spring-cloud/spring-cloud-rest/spring-cloud-rest-books-api/src/test/java/com/baeldung/SpringContextLiveTest.java

@@ -1,5 +1,6 @@
-package org.baeldung;
+package com.baeldung;
 
+import com.baeldung.BooksApiApplication;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;

spring-cloud/spring-cloud-rest/spring-cloud-rest-config-server/pom.xml

@@ -2,7 +2,7 @@
 <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>org.baeldung</groupId>
+    <groupId>com.baeldung</groupId>
     <artifactId>spring-cloud-rest-config-server</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>spring-cloud-rest-config-server</name>

spring-cloud/spring-cloud-rest/spring-cloud-rest-config-server/src/main/java/com/baeldung/SpringCloudRestConfigApplication.java

@@ -1,4 +1,4 @@
-package org.baeldung;
+package com.baeldung;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;