Merge pull request #70 from eugenp/master

update

.gitignore

@@ -87,4 +87,7 @@ transaction.log
 apache-cxf/cxf-aegis/baeldung.xml
 testing-modules/report-*.json
 
-libraries-2/*.db
+libraries-2/*.db
+
+# SDKMan
+.sdkmanrc

apache-spark/pom.xml

@@ -74,6 +74,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.3.0</version>
                 <executions>
                     <execution>
                         <phase>package</phase>

core-java-modules/core-java-11-2/README.md

@@ -0,0 +1,7 @@
+## Core Java 11
+
+This module contains articles about Java 11 core features
+
+### Relevant articles
+- [Guide to Java 8 Optional](https://www.baeldung.com/java-optional)
+

core-java-modules/core-java-11-2/pom.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project
+        xmlns="http://maven.apache.org/POM/4.0.0"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-11-2</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-11-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source.version}</source>
+                    <target>${maven.compiler.target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source.version>11</maven.compiler.source.version>
+        <maven.compiler.target.version>11</maven.compiler.target.version>
+        <assertj.version>3.17.2</assertj.version>
+    </properties>
+
+</project>

core-java-modules/core-java-11-2/src/test/java/com/baeldung/optional/OptionalChainingUnitTest.java

@@ -7,7 +7,9 @@ import java.util.Optional;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 public class OptionalChainingUnitTest {
 

core-java-modules/core-java-11-2/src/test/java/com/baeldung/optional/OptionalUnitTest.java

@@ -9,7 +9,9 @@ import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Optional;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 public class OptionalUnitTest {
 
@@ -262,6 +264,12 @@ public class OptionalUnitTest {
             .orElseThrow(IllegalArgumentException::new);
     }
 
+    @Test(expected = NoSuchElementException.class)
+    public void whenNoArgOrElseThrowWorks_thenCorrect() {
+        String nullName = null;
+        String name = Optional.ofNullable(nullName).orElseThrow();
+    }
+
     public String getMyDefault() {
         LOG.debug("Getting default value...");
         return "Default Value";

core-java-modules/core-java-11/pom.xml

@@ -107,7 +107,7 @@
         <uberjar.name>benchmarks</uberjar.name>
         <jmh.version>1.22</jmh.version>
         <eclipse.collections.version>10.0.0</eclipse.collections.version>
-        <shade.plugin.version>10.0.0</shade.plugin.version>
+        <shade.plugin.version>3.2.4</shade.plugin.version>
     </properties>
 
 </project>

core-java-modules/core-java-arrays-guides/src/main/java/com/baeldung/array/arraystoreexception/ArrayStoreExampleCE.java

@@ -0,0 +1,11 @@
+package com.baeldung.array.arraystoreexception;
+
+public class ArrayStoreExampleCE {
+
+    public static void main(String[] args) {
+        
+        //String array[] = new String[5]; //This will lead to compile-time error at line-8 when uncommented
+        //array[0] = 2;
+    }
+
+}

core-java-modules/core-java-arrays-guides/src/main/java/com/baeldung/array/arraystoreexception/ArrayStoreExceptionExample.java

@@ -0,0 +1,16 @@
+package com.baeldung.array.arraystoreexception;
+
+public class ArrayStoreExceptionExample {
+
+    public static void main(String[] args) {
+
+        try {
+            Object array[] = new String[5];
+            array[0] = 2;
+        } catch (ArrayStoreException e) {
+            // handle the exception
+        }
+
+    }
+
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exceptions/illegalmonitorstate/Data.java

@@ -0,0 +1,14 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+public class Data {
+    private String message;
+
+    public void send(String message) {
+        this.message = message;
+    }
+
+    public String receive() {
+        return message;
+    }
+}
+

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exceptions/illegalmonitorstate/SynchronizedReceiver.java

@@ -0,0 +1,39 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SynchronizedReceiver implements Runnable {
+    private static Logger log = LoggerFactory.getLogger(SynchronizedReceiver.class);
+    private final Data data;
+    private String message;
+    private boolean illegalMonitorStateExceptionOccurred;
+
+    public SynchronizedReceiver(Data data) {
+        this.data = data;
+    }
+
+    @Override
+    public void run() {
+        synchronized (data) {
+            try {
+                data.wait();
+                this.message = data.receive();
+            } catch (InterruptedException e) {
+                log.error("thread was interrupted", e);
+                Thread.currentThread().interrupt();
+            } catch (IllegalMonitorStateException e) {
+                log.error("illegal monitor state exception occurred", e);
+                illegalMonitorStateExceptionOccurred = true;
+            }
+        }
+    }
+
+    public boolean hasIllegalMonitorStateExceptionOccurred() {
+        return illegalMonitorStateExceptionOccurred;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exceptions/illegalmonitorstate/SynchronizedSender.java

@@ -0,0 +1,37 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SynchronizedSender implements Runnable {
+    private static Logger log = LoggerFactory.getLogger(SynchronizedSender.class);
+    private final Data data;
+    private boolean illegalMonitorStateExceptionOccurred;
+
+    public SynchronizedSender(Data data) {
+        this.data = data;
+    }
+
+    @Override
+    public void run() {
+        synchronized (data) {
+            try {
+                Thread.sleep(1000);
+
+                data.send("test");
+
+                data.notifyAll();
+            } catch (InterruptedException e) {
+                log.error("thread was interrupted", e);
+                Thread.currentThread().interrupt();
+            } catch (IllegalMonitorStateException e) {
+                log.error("illegal monitor state exception occurred", e);
+                illegalMonitorStateExceptionOccurred = true;
+            }
+        }
+    }
+
+    public boolean hasIllegalMonitorStateExceptionOccurred() {
+        return illegalMonitorStateExceptionOccurred;
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exceptions/illegalmonitorstate/UnsynchronizedReceiver.java

@@ -0,0 +1,37 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class UnsynchronizedReceiver implements Runnable {
+    private static Logger log = LoggerFactory.getLogger(UnsynchronizedReceiver.class);
+    private final Data data;
+    private String message;
+    private boolean illegalMonitorStateExceptionOccurred;
+
+    public UnsynchronizedReceiver(Data data) {
+        this.data = data;
+    }
+
+    @Override
+    public void run() {
+        try {
+            data.wait();
+            this.message = data.receive();
+        } catch (InterruptedException e) {
+            log.error("thread was interrupted", e);
+            Thread.currentThread().interrupt();
+        } catch (IllegalMonitorStateException e) {
+            log.error("illegal monitor state exception occurred", e);
+            illegalMonitorStateExceptionOccurred = true;
+        }
+    }
+
+    public boolean hasIllegalMonitorStateExceptionOccurred() {
+        return illegalMonitorStateExceptionOccurred;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+}

core-java-modules/core-java-exceptions-3/src/main/java/com/baeldung/exceptions/illegalmonitorstate/UnsynchronizedSender.java

@@ -0,0 +1,35 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class UnsynchronizedSender implements Runnable {
+    private static Logger log = LoggerFactory.getLogger(UnsynchronizedSender.class);
+    private final Data data;
+    private boolean illegalMonitorStateExceptionOccurred;
+
+    public UnsynchronizedSender(Data data) {
+        this.data = data;
+    }
+
+    @Override
+    public void run() {
+        try {
+            Thread.sleep(1000);
+
+            data.send("test");
+
+            data.notifyAll();
+        } catch (InterruptedException e) {
+            log.error("thread was interrupted", e);
+            Thread.currentThread().interrupt();
+        } catch (IllegalMonitorStateException e) {
+            log.error("illegal monitor state exception occurred", e);
+            illegalMonitorStateExceptionOccurred = true;
+        }
+    }
+
+    public boolean hasIllegalMonitorStateExceptionOccurred() {
+        return illegalMonitorStateExceptionOccurred;
+    }
+}

core-java-modules/core-java-exceptions-3/src/test/java/com/baeldung/exceptions/illegalmonitorstate/IllegalMonitorStateExceptionUnitTest.java

@@ -0,0 +1,70 @@
+package com.baeldung.exceptions.illegalmonitorstate;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class IllegalMonitorStateExceptionUnitTest {
+
+    @Test
+    void whenSyncSenderAndSyncReceiverAreUsed_thenIllegalMonitorExceptionShouldNotBeThrown() throws InterruptedException {
+        Data data = new Data();
+
+        SynchronizedReceiver receiver = new SynchronizedReceiver(data);
+        Thread receiverThread = new Thread(receiver, "receiver-thread");
+        receiverThread.start();
+
+        SynchronizedSender sender = new SynchronizedSender(data);
+        Thread senderThread = new Thread(sender, "sender-thread");
+        senderThread.start();
+
+        senderThread.join(1000);
+        receiverThread.join(1000);
+
+        assertEquals("test", receiver.getMessage());
+        assertFalse(sender.hasIllegalMonitorStateExceptionOccurred());
+        assertFalse(receiver.hasIllegalMonitorStateExceptionOccurred());
+    }
+
+    @Test
+    void whenSyncSenderAndUnSyncReceiverAreUsed_thenIllegalMonitorExceptionShouldNotBeThrown() throws InterruptedException {
+        Data data = new Data();
+
+        UnsynchronizedReceiver receiver = new UnsynchronizedReceiver(data);
+        Thread receiverThread = new Thread(receiver, "receiver-thread");
+        receiverThread.start();
+
+        SynchronizedSender sender = new SynchronizedSender(data);
+        Thread senderThread = new Thread(sender, "sender-thread");
+        senderThread.start();
+
+
+        receiverThread.join(1000);
+        senderThread.join(1000);
+
+        assertNull(receiver.getMessage());
+        assertFalse(sender.hasIllegalMonitorStateExceptionOccurred());
+        assertTrue(receiver.hasIllegalMonitorStateExceptionOccurred());
+    }
+
+    @Test
+    void whenUnSyncSenderAndSyncReceiverAreUsed_thenIllegalMonitorExceptionShouldBeThrown() throws InterruptedException {
+        Data data = new Data();
+
+        SynchronizedReceiver receiver = new SynchronizedReceiver(data);
+        Thread receiverThread = new Thread(receiver, "receiver-thread");
+        receiverThread.start();
+
+        UnsynchronizedSender sender = new UnsynchronizedSender(data);
+        Thread senderThread = new Thread(sender, "sender-thread");
+        senderThread.start();
+
+
+        receiverThread.join(1000);
+        senderThread.join(1000);
+
+        assertNull(receiver.getMessage());
+        assertFalse(receiver.hasIllegalMonitorStateExceptionOccurred());
+        assertTrue(sender.hasIllegalMonitorStateExceptionOccurred());
+    }
+}

core-java-modules/core-java-io-2/src/main/resources/logback.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+    </encoder>
+  </appender>
+
+  <root level="WARN">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>

core-java-modules/core-java-io-3/src/test/java/com/baeldung/tempdirectory/TemporaryDirectoriesUnitTest.java

@@ -0,0 +1,75 @@
+package com.baeldung.tempdirectory;
+
+import org.apache.commons.io.FileUtils;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.PosixFileAttributes;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Set;
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+/**
+ * Tests several possibilities on how to create
+ * temporary directories.
+ *
+ * @author Rui Vilao (rpvilao@gmail.com)
+ */
+public class TemporaryDirectoriesUnitTest {
+
+    @Test
+    public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithPlainJava_thenInsideOSTempDirStructure() throws IOException {
+        final String tmpdir = Files.createTempDirectory("tmpDirPrefix").toFile().getAbsolutePath();
+        final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
+
+        assertThat(tmpdir).startsWith(tmpDirsLocation);
+    }
+
+    @Test
+    public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithGuava_thenInsideOSTempDirStructure() throws IOException {
+        final String tmpdir = com.google.common.io.Files.createTempDir().getAbsolutePath();
+        final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
+
+        assertThat(tmpdir).startsWith(tmpDirsLocation);
+    }
+
+    @Test
+    public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithApacheCommonsIo_thenInsideOSTempDirStructure() throws IOException {
+        final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
+        final Path path = Paths.get(FileUtils.getTempDirectory().getAbsolutePath(), UUID.randomUUID().toString());
+        final String tmpdir = Files.createDirectories(path).toFile().getAbsolutePath();
+
+        assertThat(tmpdir).startsWith(tmpDirsLocation);
+    }
+
+    @Test
+    public void givenTempDirWithPrefixWithTargetSpecified_whenCreatePlainJava_thenInsideTarget() throws IOException {
+        final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix");
+        assertThat(tmpdir.toFile().getPath()).startsWith("target");
+    }
+
+    @Test
+    public void givenTempDirWithPrefixWithTargetSpecifiedWithDeleteOnExit_whenCreatePlainJava_thenInsideTarget() throws IOException {
+        final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix");
+        assertThat(tmpdir.toFile().getPath()).startsWith("target");
+        tmpdir.toFile().deleteOnExit();
+        // we can really assert this test, just as an example.
+    }
+
+    @Test
+    public void givenTempDirWithPrefixWithFileAttrs_whenCreatePlainJava_thenAttributesAreSet() throws IOException {
+        final FileAttribute<Set<PosixFilePermission>> attrs = PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("r--------"));
+
+        final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix", attrs);
+        assertThat(tmpdir.toFile().getPath()).startsWith("target");
+        assertThat(tmpdir.toFile().canWrite()).isFalse();
+    }
+}

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

@@ -4,7 +4,6 @@ This module contains articles about Java Optional.
 
 ### Relevant Articles: 
 - [Java Optional as Return Type](https://www.baeldung.com/java-optional-return)
-- [Guide to Java 8 Optional](https://www.baeldung.com/java-optional)
 - [Java Optional – orElse() vs orElseGet()](https://www.baeldung.com/java-optional-or-else-vs-or-else-get)
 - [Transforming an Empty String into an Empty Optional](https://www.baeldung.com/java-empty-string-to-empty-optional)
 - [Filtering a Stream of Optionals in Java](https://www.baeldung.com/java-filter-stream-of-optional)

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

@@ -0,0 +1,7 @@
+## Core Kotlin Collections
+
+This module contains articles about core Kotlin collections.
+
+### Relevant articles:
+
+

core-kotlin-modules/core-kotlin-collections-2/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-kotlin-collections-2</artifactId>
+    <name>core-kotlin-collections-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-kotlin-modules</groupId>
+        <artifactId>core-kotlin-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib-jdk8</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-math3</artifactId>
+            <version>${commons-math3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-test</artifactId>
+            <version>${kotlin.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <kotlin.version>1.3.30</kotlin.version>
+        <commons-math3.version>3.6.1</commons-math3.version>
+        <assertj.version>3.10.0</assertj.version>
+    </properties>
+
+</project>

core-kotlin-modules/core-kotlin-collections-2/src/main/kotlin/com/baeldung/aggregate/AggregateOperations.kt

@@ -0,0 +1,107 @@
+package com.baeldung.aggregate
+
+class AggregateOperations {
+    private val numbers = listOf(1, 15, 3, 8)
+
+    fun countList(): Int {
+        return numbers.count()
+    }
+
+    fun sumList(): Int {
+        return numbers.sum()
+    }
+
+    fun averageList(): Double {
+        return numbers.average()
+    }
+
+    fun maximumInList(): Int? {
+        return numbers.max()
+    }
+
+    fun minimumInList(): Int? {
+        return numbers.min()
+    }
+
+    fun maximumByList(): Int? {
+        return numbers.maxBy { it % 5 }
+    }
+
+    fun minimumByList(): Int? {
+        return numbers.minBy { it % 5 }
+    }
+
+    fun maximumWithList(): String? {
+        val strings = listOf("Berlin", "Kolkata", "Prague", "Barcelona")
+        return strings.maxWith(compareBy { it.length % 4 })
+    }
+
+    fun minimumWithList(): String? {
+        val strings = listOf("Berlin", "Kolkata", "Prague", "Barcelona")
+        return strings.minWith(compareBy { it.length % 4 })
+    }
+
+    fun sumByList(): Int {
+        return numbers.sumBy { it * 5 }
+    }
+
+    fun sumByDoubleList(): Double {
+        return numbers.sumByDouble { it.toDouble() / 8 }
+    }
+
+    fun foldList(): Int {
+        return numbers.fold(100) { total, it ->
+            println("total = $total, it = $it")
+            total - it
+        } // ((((100 - 1)-15)-3)-8) = 73
+    }
+
+    fun foldRightList(): Int {
+        return numbers.foldRight(100) { it, total ->
+            println("total = $total, it = $it")
+            total - it
+        }  // ((((100-8)-3)-15)-1) = 73
+    }
+
+    fun foldIndexedList(): Int {
+        return numbers.foldIndexed(100) { index, total, it ->
+            println("total = $total, it = $it, index = $index")
+            if (index.minus(2) >= 0) total - it else total
+        } // ((100 - 3)-8) = 89
+    }
+
+    fun foldRightIndexedList(): Int {
+        return numbers.foldRightIndexed(100) { index, it, total ->
+            println("total = $total, it = $it, index = $index")
+            if (index.minus(2) >= 0) total - it else total
+        } // ((100 - 8)-3) = 89
+    }
+
+    fun reduceList(): Int {
+        return numbers.reduce { total, it ->
+            println("total = $total, it = $it")
+            total - it
+        } // (((1 - 15)-3)-8) = -25
+    }
+
+    fun reduceRightList(): Int {
+        return numbers.reduceRight() { it, total ->
+            println("total = $total, it = $it")
+            total - it
+        } // ((8-3)-15)-1) = -11
+    }
+
+    fun reduceIndexedList(): Int {
+        return numbers.reduceIndexed { index, total, it ->
+            println("total = $total, it = $it, index = $index")
+            if (index.minus(2) >= 0) total - it else total
+        } // ((1-3)-8) = -10
+    }
+
+    fun reduceRightIndexedList(): Int {
+        return numbers.reduceRightIndexed { index, it, total ->
+            println("total = $total, it = $it, index = $index")
+            if (index.minus(2) >= 0) total - it else total
+        } // ((8-3) = 5
+    }
+}

core-kotlin-modules/core-kotlin-collections-2/src/test/kotlin/com/baeldung/aggregate/AggregateOperationsUnitTest.kt

@@ -0,0 +1,104 @@
+package com.baeldung.aggregate
+
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+class AggregateOperationsUnitTest {
+
+    private val classUnderTest: AggregateOperations = AggregateOperations()
+
+    @Test
+    fun whenCountOfList_thenReturnsValue() {
+        assertEquals(4, classUnderTest.countList())
+    }
+
+    @Test
+    fun whenSumOfList_thenReturnsTotalValue() {
+        assertEquals(27, classUnderTest.sumList())
+    }
+
+    @Test
+    fun whenAverageOfList_thenReturnsValue() {
+        assertEquals(6.75, classUnderTest.averageList())
+    }
+
+    @Test
+    fun whenMaximumOfList_thenReturnsMaximumValue() {
+        assertEquals(15, classUnderTest.maximumInList())
+    }
+
+    @Test
+    fun whenMinimumOfList_thenReturnsMinimumValue() {
+        assertEquals(1, classUnderTest.minimumInList())
+    }
+
+    @Test
+    fun whenMaxByList_thenReturnsLargestValue() {
+        assertEquals(3, classUnderTest.maximumByList())
+    }
+
+    @Test
+    fun whenMinByList_thenReturnsSmallestValue() {
+        assertEquals(15, classUnderTest.minimumByList())
+    }
+
+    @Test
+    fun whenMaxWithList_thenReturnsLargestValue(){
+        assertEquals("Kolkata", classUnderTest.maximumWithList())
+    }
+
+    @Test
+    fun whenMinWithList_thenReturnsSmallestValue(){
+        assertEquals("Barcelona", classUnderTest.minimumWithList())
+    }
+
+    @Test
+    fun whenSumByList_thenReturnsIntegerValue(){
+        assertEquals(135, classUnderTest.sumByList())
+    }
+
+    @Test
+    fun whenSumByDoubleList_thenReturnsDoubleValue(){
+        assertEquals(3.375, classUnderTest.sumByDoubleList())
+    }
+
+    @Test
+    fun whenFoldList_thenReturnsValue(){
+        assertEquals(73, classUnderTest.foldList())
+    }
+
+    @Test
+    fun whenFoldRightList_thenReturnsValue(){
+        assertEquals(73, classUnderTest.foldRightList())
+    }
+
+    @Test
+    fun whenFoldIndexedList_thenReturnsValue(){
+        assertEquals(89, classUnderTest.foldIndexedList())
+    }
+
+    @Test
+    fun whenFoldRightIndexedList_thenReturnsValue(){
+        assertEquals(89, classUnderTest.foldRightIndexedList())
+    }
+
+    @Test
+    fun whenReduceList_thenReturnsValue(){
+        assertEquals(-25, classUnderTest.reduceList())
+    }
+
+    @Test
+    fun whenReduceRightList_thenReturnsValue(){
+        assertEquals(-11, classUnderTest.reduceRightList())
+    }
+
+    @Test
+    fun whenReduceIndexedList_thenReturnsValue(){
+        assertEquals(-10, classUnderTest.reduceIndexedList())
+    }
+
+    @Test
+    fun whenReduceRightIndexedList_thenReturnsValue(){
+        assertEquals(5, classUnderTest.reduceRightIndexedList())
+    }
+}

core-kotlin-modules/core-kotlin-lang/src/main/kotlin/com/baeldung/inline/Inline.kt

@@ -22,6 +22,30 @@ fun main() {
     numbers.each { println(random * it) } // capturing the random variable
 }
 
+fun namedFunction(): Int {
+    return 42
+}
+
+fun anonymous(): () -> Int {
+    return fun(): Int {
+        return 42
+    }
+}
+
+inline fun <T> List<T>.eachIndexed(f: (Int, T) -> Unit) {
+    for (i in indices) {
+        f(i, this[i])
+    }
+}
+
+fun <T> List<T>.indexOf(x: T): Int {
+    eachIndexed { index, value ->
+        if (value == x) return index
+    }
+
+    return -1
+}
+
 /**
  * Generates a random number.
  */

core-kotlin-modules/pom.xml

@@ -21,6 +21,7 @@
         <module>core-kotlin-advanced</module>
         <module>core-kotlin-annotations</module>
         <module>core-kotlin-collections</module>
+        <module>core-kotlin-collections-2</module>
         <module>core-kotlin-concurrency</module>
         <module>core-kotlin-date-time</module>
         <module>core-kotlin-design-patterns</module>

drools/README.MD

@@ -6,3 +6,4 @@ This module contains articles about Drools
 
 - [Introduction to Drools](https://www.baeldung.com/drools)
 - [An Example of Backward Chaining in Drools](https://www.baeldung.com/drools-backward-chaining)
+- [Drools Using Rules from Excel Files](https://www.baeldung.com/drools-excel)

java-collections-conversions-2/src/test/java/com/baeldung/arrayconversion/ArrayToListConversionUnitTest.java

@@ -1,21 +1,24 @@
 package com.baeldung.arrayconversion;
 
+import org.hamcrest.CoreMatchers;
 import org.junit.Test;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertArrayEquals;
+
 public class ArrayToListConversionUnitTest {
 
     @Test(expected = UnsupportedOperationException.class)
     public void givenAnArray_whenConvertingToList_returnUnmodifiableListUnitTest() {
         String[] stringArray = new String[] { "A", "B", "C", "D" };
         List<String> stringList = Arrays.asList(stringArray);
-        System.out.println(stringList);
         stringList.set(0, "E");
-        System.out.println(stringList);
+        assertThat(stringList, CoreMatchers.hasItems("E", "B", "C", "D"));
-        System.out.println(Arrays.toString(stringArray));
+        assertArrayEquals(stringArray, new String[] { "E", "B", "C", "D" });
         stringList.add("F");
     }
 
@@ -23,10 +26,10 @@ public class ArrayToListConversionUnitTest {
     public void givenAnArray_whenConvertingToList_returnModifiableListUnitTest() {
         String[] stringArray = new String[] { "A", "B", "C", "D" };
         List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
-        System.out.println(stringList);
         stringList.set(0, "E");
-        System.out.println(stringList);
+        assertThat(stringList, CoreMatchers.hasItems("E", "B", "C", "D"));
-        System.out.println(Arrays.toString(stringArray));
+        assertArrayEquals(stringArray, new String[] { "A", "B", "C", "D" });
         stringList.add("F");
+        assertThat(stringList, CoreMatchers.hasItems("E", "B", "C", "D", "F"));
     }
 }

jhipster-5/bookstore-monolith/pom.xml

@@ -237,6 +237,26 @@
     <build>
         <defaultGoal>spring-boot:run</defaultGoal>
         <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>properties-maven-plugin</artifactId>
+                <version>1.0.0</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>set-system-properties</goal>
+                        </goals>
+                        <configuration>
+                            <properties>
+                                <property>
+                                    <name>org.slf4j.simpleLogger.log.com.github.eirslett</name>
+                                    <value>error</value>
+                                </property>
+                            </properties>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>

jhipster/pom.xml

@@ -9,6 +9,8 @@
     <packaging>pom</packaging>
 
     <parent>
+    <!-- Jhipster project is autogenerated and upgrading it will need a newly generated project. 
+        Also, we already have jhipster-5 which has new version of boot-2. So, this project should be left as a legacy version. -->
         <artifactId>parent-boot-1</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>

libraries-security/pom.xml

@@ -14,29 +14,24 @@
     </parent>
 
     <dependencies>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.security.oauth</groupId>
             <artifactId>spring-security-oauth2</artifactId>
             <version>${spring-boot.version}</version>
         </dependency>
-        
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>com.github.scribejava</groupId>
             <artifactId>scribejava-apis</artifactId>
             <version>${scribejava.version}</version>
         </dependency>
-
         <dependency>
             <groupId>com.google.crypto.tink</groupId>
             <artifactId>tink</artifactId>
@@ -72,6 +67,16 @@
             <artifactId>jasypt</artifactId>
             <version>${jasypt.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.jcraft</groupId>
+            <artifactId>jsch</artifactId>
+            <version>${jsch.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.sshd</groupId>
+            <artifactId>sshd-core</artifactId>
+            <version>${apache-mina.version}</version>
+        </dependency>
     </dependencies>
 
     <properties>
@@ -81,6 +86,8 @@
         <cryptacular.version>1.2.2</cryptacular.version>
         <jasypt.version>1.9.2</jasypt.version>
         <bouncycastle.version>1.58</bouncycastle.version>
+        <jsch.version>0.1.55</jsch.version>
+        <apache-mina.version>2.5.1</apache-mina.version>
     </properties>
 
 </project>

libraries-security/src/main/java/com/baeldung/ssh/apachesshd/SshdDemo.java

@@ -0,0 +1,64 @@
+package com.baeldung.ssh.apachesshd;
+
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStream;
+import java.util.EnumSet;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.sshd.client.SshClient;
+import org.apache.sshd.client.channel.ClientChannel;
+import org.apache.sshd.client.channel.ClientChannelEvent;
+import org.apache.sshd.client.session.ClientSession;
+import org.apache.sshd.common.channel.Channel;
+
+public class SshdDemo {
+
+    public static void main(String[] args) throws Exception {
+        String username = "demo";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        long defaultTimeoutSeconds = 10l;
+        String command = "ls\n";
+        
+        listFolderStructure(username, password, host, port, defaultTimeoutSeconds, command);
+    }
+
+    public static String listFolderStructure(String username, String password, String host, int port, long defaultTimeoutSeconds, String command) throws Exception {
+        SshClient client = SshClient.setUpDefaultClient();
+        client.start();
+        try (ClientSession session = client.connect(username, host, port)
+          .verify(defaultTimeoutSeconds, TimeUnit.SECONDS)
+            .getSession()) {
+            session.addPasswordIdentity(password);
+            session.auth()
+              .verify(defaultTimeoutSeconds, TimeUnit.SECONDS);
+            try (ByteArrayOutputStream responseStream = new ByteArrayOutputStream();
+                 ByteArrayOutputStream errorResponseStream = new ByteArrayOutputStream();
+                 ClientChannel channel = session.createChannel(Channel.CHANNEL_SHELL)) {
+                channel.setOut(responseStream);
+                channel.setErr(errorResponseStream);
+                try {
+                    channel.open()
+                      .verify(defaultTimeoutSeconds, TimeUnit.SECONDS);
+                    try (OutputStream pipedIn = channel.getInvertedIn()) {
+                        pipedIn.write(command.getBytes());
+                        pipedIn.flush();
+                    }
+                    channel.waitFor(EnumSet.of(ClientChannelEvent.CLOSED), TimeUnit.SECONDS.toMillis(defaultTimeoutSeconds));
+                    String errorString = new String(errorResponseStream.toByteArray());
+                    if(!errorString.isEmpty()) {
+                        throw new Exception(errorString);
+                    }
+                    String responseString = new String(responseStream.toByteArray());
+                    return responseString;
+                } finally {
+                    channel.close(false);
+                }
+            }
+        } finally {
+            client.stop();
+        }
+    }
+
+}

libraries-security/src/main/java/com/baeldung/ssh/jsch/JschDemo.java

@@ -0,0 +1,54 @@
+package com.baeldung.ssh.jsch;
+
+import java.io.ByteArrayOutputStream;
+
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.JSch;
+import com.jcraft.jsch.Session;
+
+public class JschDemo {
+
+    public static void main(String args[]) throws Exception {
+        String username = "demo";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        String command = "ls";
+        listFolderStructure(username, password, host, port, command);
+    }
+
+    public static String listFolderStructure(String username, String password, String host, int port, String command) throws Exception {
+        Session session = null;
+        ChannelExec channel = null;
+        String response = null;
+        try {
+            session = new JSch().getSession(username, host, port);
+            session.setPassword(password);
+            session.setConfig("StrictHostKeyChecking", "no");
+            session.connect();
+            channel = (ChannelExec) session.openChannel("exec");
+            channel.setCommand(command);
+            ByteArrayOutputStream responseStream = new ByteArrayOutputStream();
+            ByteArrayOutputStream errorResponseStream = new ByteArrayOutputStream();
+            channel.setOutputStream(responseStream);
+            channel.setErrStream(errorResponseStream);
+            channel.connect();
+            while (channel.isConnected()) {
+                Thread.sleep(100);
+            }
+            String errorResponse = new String(errorResponseStream.toByteArray());
+            response = new String(responseStream.toByteArray());
+            if(!errorResponse.isEmpty()) {
+                throw new Exception(errorResponse);
+            }
+        } finally {
+            if (session != null) {
+                session.disconnect();
+            }
+            if (channel != null) {
+                channel.disconnect();
+            }
+        }
+        return response;
+    }
+}

libraries-security/src/test/java/com/baeldung/ssh/ApacheMinaSshdLiveTest.java

@@ -0,0 +1,38 @@
+package com.baeldung.ssh;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+import com.baeldung.ssh.apachesshd.SshdDemo;
+
+public class ApacheMinaSshdLiveTest {
+
+    @Test
+    public void givenValidCredentials_whenConnectionIsEstablished_thenServerReturnsResponse() throws Exception {
+        String username = "demo";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        long defaultTimeoutSeconds = 10l;
+        String command = "ls\n";
+        String responseString = SshdDemo.listFolderStructure(username, password, host, port, defaultTimeoutSeconds, command);
+        
+        assertNotNull(responseString);
+    }
+
+    @Test(expected = Exception.class)
+    public void givenInvalidCredentials_whenConnectionAttemptIsMade_thenServerReturnsErrorResponse() throws Exception {
+        String username = "invalidUsername";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        long defaultTimeoutSeconds = 10l;
+        String command = "ls\n";
+        String responseString = SshdDemo.listFolderStructure(username, password, host, port, defaultTimeoutSeconds, command);
+        
+        assertNull(responseString);
+    }
+
+}

libraries-security/src/test/java/com/baeldung/ssh/JSchLiveTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.ssh;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+import com.baeldung.ssh.jsch.JschDemo;
+
+public class JSchLiveTest {
+    
+    @Test
+    public void givenValidCredentials_whenConnectionIsEstablished_thenServerReturnsResponse() throws Exception {
+        String username = "demo";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        String command = "ls";
+        String responseString = JschDemo.listFolderStructure(username, password, host, port, command);
+        
+        assertNotNull(responseString);
+    }
+
+    @Test(expected = Exception.class)
+    public void givenInvalidCredentials_whenConnectionAttemptIsMade_thenServerReturnsErrorResponse() throws Exception {
+        String username = "invalidUsername";
+        String password = "password";
+        String host = "test.rebex.net";
+        int port = 22;
+        String command = "ls";
+        String responseString = JschDemo.listFolderStructure(username, password, host, port, command);
+        
+        assertNull(responseString);
+    }
+}

logging-modules/log-mdc/README.md

@@ -1,8 +1,6 @@
 ### Relevant Articles:
-- TBD
 - [Improved Java Logging with Mapped Diagnostic Context (MDC)](https://www.baeldung.com/mdc-in-log4j-2-logback)
 - [Java Logging with Nested Diagnostic Context (NDC)](https://www.baeldung.com/java-logging-ndc-log4j)
-- [Drools Using Rules from Excel Files](https://www.baeldung.com/drools-excel)
 
 ### References
 

persistence-modules/core-java-persistence/src/main/java/com/baeldung/spring/jdbc/BatchProcessing.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 import java.sql.*;
 import java.util.UUID;

persistence-modules/core-java-persistence/src/main/java/com/baeldung/spring/jdbc/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 import java.util.Objects;
 

persistence-modules/core-java-persistence/src/main/java/com/baeldung/spring/jdbc/joins/ArticleWithAuthor.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.joins;
+package com.baeldung.spring.jdbc.joins;
 
 class ArticleWithAuthor {
 

persistence-modules/core-java-persistence/src/main/java/com/baeldung/spring/jdbc/joins/ArticleWithAuthorDAO.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.joins;
+package com.baeldung.spring.jdbc.joins;
 
 import java.sql.Connection;
 import java.sql.ResultSet;

persistence-modules/core-java-persistence/src/test/java/com/baeldung/spring/jdbc/BatchProcessingLiveTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 
 import org.junit.Before;

persistence-modules/core-java-persistence/src/test/java/com/baeldung/spring/jdbc/JdbcDriverLoadingUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 import static org.junit.Assert.*;
 

persistence-modules/core-java-persistence/src/test/java/com/baeldung/spring/jdbc/JdbcLiveTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 import org.apache.log4j.Logger;
 import org.junit.After;

persistence-modules/core-java-persistence/src/test/java/com/baeldung/spring/jdbc/ResultSetLiveTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc;
 
 import static org.junit.Assert.assertEquals;
 

persistence-modules/core-java-persistence/src/test/java/com/baeldung/spring/jdbc/joins/ArticleWithAuthorDAOLiveTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.joins;
+package com.baeldung.spring.jdbc.joins;
 
 import org.junit.After;
 import org.junit.Before;

persistence-modules/flyway/src/main/resources/db/undo/V1_0__create_book_table.sql

@@ -0,0 +1,6 @@
+create table book (
+  id numeric,
+  title varchar(128),
+  author varchar(256),
+  constraint pk_book primary key (id)
+);

persistence-modules/flyway/src/main/resources/db/undo/V2_0__drop_table_book.sql

@@ -0,0 +1 @@
+drop table book;

persistence-modules/flyway/src/test/java/com/baeldung/flywayundo/FlywayUndoMigrationIntegrationTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.flywayundo;
+
+import org.flywaydb.core.Flyway;
+import org.flywaydb.core.api.MigrationInfo;
+import org.flywaydb.core.api.MigrationState;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.sql.DataSource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = FlywayUndoTestConfig.class)
+@SpringBootTest
+public class FlywayUndoMigrationIntegrationTest {
+
+    @Autowired
+    private DataSource dataSource;
+
+    @Test
+    public void givenMigrationsExist_whenApplyMigrations_migrationsAreSuccessful() {
+        Flyway flyway = Flyway.configure()
+            .dataSource(dataSource)
+            .schemas("undo")
+            .locations("db/undo")
+            .load();
+
+        flyway.migrate();
+
+        for (MigrationInfo info : flyway.info().all()) {
+            assertThat(info.getState()).isEqualTo(MigrationState.SUCCESS);
+        }
+    }
+}

persistence-modules/flyway/src/test/java/com/baeldung/flywayundo/FlywayUndoTestConfig.java

@@ -0,0 +1,21 @@
+package com.baeldung.flywayundo;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class FlywayUndoTestConfig {
+
+    @Bean
+    public DataSource createDatasource() {
+        EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
+        return dbBuilder.setType(EmbeddedDatabaseType.H2)
+            .setName("DATABASE")
+            .build();
+    }
+
+}

persistence-modules/hibernate-ogm/src/test/resources/logback.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="WARN">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/jpa-hibernate-cascade-type/src/test/resources/hibernate.properties

@@ -5,6 +5,6 @@ hibernate.connection.autocommit=true
 jdbc.password=
 
 hibernate.dialect=org.hibernate.dialect.H2Dialect
-hibernate.show_sql=true
+hibernate.show_sql=false
 hibernate.hbm2ddl.auto=create-drop
 

persistence-modules/jpa-hibernate-cascade-type/src/test/resources/logback.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="WARN">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/pom.xml

@@ -68,7 +68,9 @@
         <module>spring-data-jpa-enterprise</module>
         <module>spring-data-jpa-filtering</module>
         <module>spring-data-jpa-query</module>
+        <module>spring-data-jpa-query-2</module>
         <module>spring-data-jpa-repo</module>
+        <module>spring-data-jpa-repo-2</module>
 
         <module>spring-data-jdbc</module>
 
@@ -82,9 +84,9 @@
         <module>spring-hibernate4</module>
         <module>spring-jpa</module>
         <module>spring-jpa-2</module>
+        <module>spring-jdbc</module>
         <!-- <module>spring-mybatis</module> --> <!-- needs fixing in BAEL-9021 -->
         <module>spring-persistence-simple</module>
-        <module>spring-persistence-simple-2</module>
     </modules>
 
     <properties>

persistence-modules/spring-data-cassandra/pom.xml

@@ -8,9 +8,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-spring-4</artifactId>
+        <artifactId>parent-spring-5</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-spring-4</relativePath>
+        <relativePath>../../parent-spring-5</relativePath>
     </parent>
 
     <dependencies>
@@ -30,6 +30,31 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-beans</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-aop</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-expression</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-tx</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>

persistence-modules/spring-data-jpa-query-2/README.md

@@ -3,7 +3,9 @@
 This module contains articles about querying data using Spring Data JPA 
 
 ### Relevant Articles: 
+- [Spring Data JPA @Query Annotation](https://www.baeldung.com/spring-data-jpa-query)
 - [Use Criteria Queries in a Spring Data Application](https://www.baeldung.com/spring-data-criteria-queries)
+- [Query Entities by Dates and Times with Spring Data JPA](https://www.baeldung.com/spring-data-jpa-query-by-date)
 - More articles: [[<-- prev]](../spring-data-jpa-query)
 
 ### Eclipse Config 

persistence-modules/spring-data-jpa-query-2/pom.xml

@@ -3,7 +3,7 @@
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <artifactId>spring-data-jpa-query</artifactId>
+    <artifactId>spring-data-jpa-query-2</artifactId>
     <name>spring-data-jpa-query-2</name>
 
     <parent>

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/User.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.model;
+package com.baeldung.spring.data.jpa.query;
 
 import javax.persistence.*;
 import java.time.LocalDate;
@@ -8,7 +8,6 @@ import java.util.Objects;
 @Entity
 @Table(name = "users")
 public class User {
-
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private int id;
@@ -28,9 +27,6 @@ public class User {
 
     private Integer status;
 
-    @OneToMany
-    List<Possession> possessionList;
-
     public User() {
         super();
     }
@@ -87,12 +83,20 @@ public class User {
         return creationDate;
     }
 
-    public List<Possession> getPossessionList() {
+    public LocalDate getLastLoginDate() {
-        return possessionList;
+        return lastLoginDate;
     }
 
-    public void setPossessionList(List<Possession> possessionList) {
+    public void setLastLoginDate(LocalDate lastLoginDate) {
-        this.possessionList = possessionList;
+        this.lastLoginDate = lastLoginDate;
+    }
+
+    public boolean isActive() {
+        return active;
+    }
+
+    public void setActive(boolean active) {
+        this.active = active;
     }
 
     @Override
@@ -119,21 +123,4 @@ public class User {
     public int hashCode() {
         return Objects.hash(id, name, creationDate, age, email, status);
     }
-
-    public LocalDate getLastLoginDate() {
-        return lastLoginDate;
-    }
-
-    public void setLastLoginDate(LocalDate lastLoginDate) {
-        this.lastLoginDate = lastLoginDate;
-    }
-
-    public boolean isActive() {
-        return active;
-    }
-
-    public void setActive(boolean active) {
-        this.active = active;
-    }
-
 }

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/UserRepository.java

@@ -1,6 +1,5 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.jpa.query;
 
-import com.baeldung.spring.data.persistence.model.User;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
@@ -9,51 +8,16 @@ import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 
-import java.time.LocalDate;
 import java.util.Collection;
 import java.util.List;
-import java.util.stream.Stream;
 
 public interface UserRepository extends JpaRepository<User, Integer>, UserRepositoryCustom {
-
-    Stream<User> findAllByName(String name);
-
     @Query("SELECT u FROM User u WHERE u.status = 1")
     Collection<User> findAllActiveUsers();
 
-    @Query("select u from User u where u.email like '%@gmail.com'")
-    List<User> findUsersWithGmailAddress();
-
     @Query(value = "SELECT * FROM Users u WHERE u.status = 1", nativeQuery = true)
     Collection<User> findAllActiveUsersNative();
 
-    @Query("SELECT u FROM User u WHERE u.status = ?1")
-    User findUserByStatus(Integer status);
-
-    @Query(value = "SELECT * FROM Users u WHERE u.status = ?1", nativeQuery = true)
-    User findUserByStatusNative(Integer status);
-
-    @Query("SELECT u FROM User u WHERE u.status = ?1 and u.name = ?2")
-    User findUserByStatusAndName(Integer status, String name);
-
-    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
-    User findUserByStatusAndNameNamedParams(@Param("status") Integer status, @Param("name") String name);
-
-    @Query(value = "SELECT * FROM Users u WHERE u.status = :status AND u.name = :name", nativeQuery = true)
-    User findUserByStatusAndNameNamedParamsNative(@Param("status") Integer status, @Param("name") String name);
-
-    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
-    User findUserByUserStatusAndUserName(@Param("status") Integer userStatus, @Param("name") String userName);
-
-    @Query("SELECT u FROM User u WHERE u.name like ?1%")
-    User findUserByNameLike(String name);
-
-    @Query("SELECT u FROM User u WHERE u.name like :name%")
-    User findUserByNameLikeNamedParam(@Param("name") String name);
-
-    @Query(value = "SELECT * FROM users u WHERE u.name LIKE ?1%", nativeQuery = true)
-    User findUserByNameLikeNative(String name);
-
     @Query(value = "SELECT u FROM User u")
     List<User> findAllUsers(Sort sort);
 
@@ -63,6 +27,27 @@ public interface UserRepository extends JpaRepository<User, Integer>, UserReposi
     @Query(value = "SELECT * FROM Users ORDER BY id", countQuery = "SELECT count(*) FROM Users", nativeQuery = true)
     Page<User> findAllUsersWithPaginationNative(Pageable pageable);
 
+    @Query("SELECT u FROM User u WHERE u.status = ?1")
+    User findUserByStatus(Integer status);
+
+    @Query("SELECT u FROM User u WHERE u.status = ?1 and u.name = ?2")
+    User findUserByStatusAndName(Integer status, String name);
+
+    @Query(value = "SELECT * FROM Users u WHERE u.status = ?1", nativeQuery = true)
+    User findUserByStatusNative(Integer status);
+
+    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
+    User findUserByStatusAndNameNamedParams(@Param("status") Integer status, @Param("name") String name);
+
+    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
+    User findUserByUserStatusAndUserName(@Param("status") Integer userStatus, @Param("name") String userName);
+
+    @Query(value = "SELECT * FROM Users u WHERE u.status = :status AND u.name = :name", nativeQuery = true)
+    User findUserByStatusAndNameNamedParamsNative(@Param("status") Integer status, @Param("name") String name);
+
+    @Query(value = "SELECT u FROM User u WHERE u.name IN :names")
+    List<User> findUserByNameList(@Param("names") Collection<String> names);
+
     @Modifying
     @Query("update User u set u.status = :status where u.name = :name")
     int updateUserSetStatusForName(@Param("status") Integer status, @Param("name") String name);
@@ -74,25 +59,4 @@ public interface UserRepository extends JpaRepository<User, Integer>, UserReposi
     @Query(value = "INSERT INTO Users (name, age, email, status, active) VALUES (:name, :age, :email, :status, :active)", nativeQuery = true)
     @Modifying
     void insertUser(@Param("name") String name, @Param("age") Integer age, @Param("email") String email, @Param("status") Integer status, @Param("active") boolean active);
-
-    @Modifying
-    @Query(value = "UPDATE Users u SET status = ? WHERE u.name = ?", nativeQuery = true)
-    int updateUserSetStatusForNameNativePostgres(Integer status, String name);
-
-    @Query(value = "SELECT u FROM User u WHERE u.name IN :names")
-    List<User> findUserByNameList(@Param("names") Collection<String> names);
-
-    void deleteAllByCreationDateAfter(LocalDate date);
-
-    @Modifying(clearAutomatically = true, flushAutomatically = true)
-    @Query("update User u set u.active = false where u.lastLoginDate < :date")
-    void deactivateUsersNotLoggedInSince(@Param("date") LocalDate date);
-
-    @Modifying(clearAutomatically = true, flushAutomatically = true)
-    @Query("delete User u where u.active = false")
-    int deleteDeactivatedUsers();
-
-    @Modifying(clearAutomatically = true, flushAutomatically = true)
-    @Query(value = "alter table USERS add column deleted int(1) not null default 0", nativeQuery = true)
-    void addDeletedColumn();
 }

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/UserRepositoryCustom.java

@@ -1,6 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.jpa.query;
-
-import com.baeldung.spring.data.persistence.model.User;
 
 import java.util.Collection;
 import java.util.List;

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/UserRepositoryCustomImpl.java

@@ -1,6 +1,4 @@
-package com.baeldung.spring.data.persistence.repository;
+package com.baeldung.spring.data.jpa.query;
-
-import com.baeldung.spring.data.persistence.model.User;
 
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
@@ -13,7 +11,6 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 public class UserRepositoryCustomImpl implements UserRepositoryCustom {
-
     @PersistenceContext
     private EntityManager entityManager;
 
@@ -48,5 +45,4 @@ public class UserRepositoryCustomImpl implements UserRepositoryCustom {
 
         return allUsersStream.collect(Collectors.toList());
     }
-
 }

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/datetime/Application.java

@@ -1,12 +1,13 @@
-package com.baeldung.spring.transactional;
+package com.baeldung.spring.data.jpa.query.datetime;
-
+
-import org.springframework.boot.SpringApplication;
+import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
-
+
-@SpringBootApplication
+@SpringBootApplication
-class TransactionalCompareApplication {
+public class Application {
-
+
-    public static void main(String[] args) {
+    public static void main(String[] args) {
-        SpringApplication.run(TransactionalCompareApplication.class, args);
+        SpringApplication.run(Application.class, args);
-    }
+    }
-}
+
+}

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/datetime/Article.java

@@ -1,4 +1,4 @@
-package com.baeldung.boot.domain;
+package com.baeldung.spring.data.jpa.query.datetime;
 
 import javax.persistence.*;
 import java.util.Date;

persistence-modules/spring-data-jpa-query-2/src/main/java/com/baeldung/spring/data/jpa/query/datetime/ArticleRepository.java

@@ -1,11 +1,9 @@
-package com.baeldung.boot.daos;
+package com.baeldung.spring.data.jpa.query.datetime;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 
-import com.baeldung.boot.domain.Article;
-
 import java.util.Date;
 import java.util.List;
 

persistence-modules/spring-data-jpa-query-2/src/test/java/com/baeldung/spring/data/jpa/query/datetime/ArticleRepositoryIntegrationTest.java

@@ -1,11 +1,4 @@
-package com.baeldung.boot.daos;
+package com.baeldung.spring.data.jpa.query.datetime;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-import java.text.SimpleDateFormat;
-import java.util.Arrays;
-import java.util.List;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -13,7 +6,12 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.test.context.junit4.SpringRunner;
 
-import com.baeldung.boot.domain.Article;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 @RunWith(SpringRunner.class)
 @DataJpaTest(properties="spring.datasource.data=classpath:import_entities.sql")

persistence-modules/spring-data-jpa-query/README.md

@@ -3,7 +3,6 @@
 This module contains articles about querying data using Spring Data JPA 
 
 ### Relevant Articles: 
-- [Query Entities by Dates and Times with Spring Data JPA](https://www.baeldung.com/spring-data-jpa-query-by-date)
 - [The Exists Query in Spring Data](https://www.baeldung.com/spring-data-exists-query)
 - [Customizing the Result of JPA Queries with Aggregation Functions](https://www.baeldung.com/jpa-queries-custom-result-with-aggregation-functions)
 - [Limiting Query Results with JPA and Spring Data JPA](https://www.baeldung.com/jpa-limit-query-results)

persistence-modules/spring-data-jpa-repo-2/README.md

@@ -0,0 +1,5 @@
+## Spring Data JPA - Repositories
+
+### Relevant Articles: 
+- [Introduction to Spring Data JPA](https://www.baeldung.com/the-persistence-layer-with-spring-data-jpa)
+- More articles: [[<-- prev]](/spring-data-jpa-repo/)

persistence-modules/spring-data-jpa-repo-2/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <artifactId>spring-data-jpa-repo-2</artifactId>
+    <name>spring-data-jpa-repo-2</name>
+
+    <dependencies>
+        <!-- Persistence -->
+        <dependency>
+            <groupId>javax.persistence</groupId>
+            <artifactId>javax.persistence-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
+
+        <!-- Utilities -->
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <guava.version>29.0-jre</guava.version>
+    </properties>
+</project>

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/Foo.java

@@ -1,16 +1,10 @@
-package com.baeldung.spring.data.persistence.model;
+package com.baeldung.spring.data.persistence.repository;
 
+import javax.persistence.*;
 import java.io.Serializable;
 
-import javax.persistence.Column;
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.GenerationType;
-import javax.persistence.Id;
-
 @Entity
 public class Foo implements Serializable {
-
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private long id;
@@ -28,8 +22,6 @@ public class Foo implements Serializable {
         this.name = name;
     }
 
-    // API
-
     public long getId() {
         return id;
     }
@@ -46,8 +38,6 @@ public class Foo implements Serializable {
         this.name = name;
     }
 
-    //
-
     @Override
     public int hashCode() {
         final int prime = 31;
@@ -79,5 +69,4 @@ public class Foo implements Serializable {
         builder.append("Foo [name=").append(name).append("]");
         return builder.toString();
     }
-
+}
-}

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/FooService.java

@@ -0,0 +1,15 @@
+package com.baeldung.spring.data.persistence.repository;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class FooService implements IFooService {
+    @Autowired
+    private IFooDAO dao;
+
+    @Override
+    public Foo create(Foo foo) {
+        return dao.save(foo);
+    }
+}

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooDAO.java

@@ -1,13 +1,13 @@
 package com.baeldung.spring.data.persistence.repository;
 
-import com.baeldung.spring.data.persistence.model.Foo;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 
-public interface IFooDao extends JpaRepository<Foo, Long> {
+public interface IFooDAO extends JpaRepository<Foo, Long> {
+
+    Foo findByName(String name);
 
     @Query("SELECT f FROM Foo f WHERE LOWER(f.name) = LOWER(:name)")
     Foo retrieveByName(@Param("name") String name);
-
 }

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/IFooService.java

@@ -0,0 +1,5 @@
+package com.baeldung.spring.data.persistence.repository;
+
+public interface IFooService {
+    Foo create(Foo foo);
+}

persistence-modules/spring-data-jpa-repo-2/src/main/java/com/baeldung/spring/data/persistence/repository/PersistenceConfig.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.data.persistence.config;
+package com.baeldung.spring.data.persistence.repository;
 
 import com.google.common.base.Preconditions;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -20,11 +20,11 @@ import javax.sql.DataSource;
 import java.util.Properties;
 
 @Configuration
+@PropertySource("classpath:persistence.properties")
+@ComponentScan("com.baeldung.spring.data.persistence.repository")
+//@ImportResource("classpath*:*springDataConfig.xml")
 @EnableTransactionManagement
-@PropertySource({ "classpath:persistence-${envTarget:h2}.properties" })
+@EnableJpaRepositories(basePackages = "com.baeldung.spring.data.persistence.repository")
-@ComponentScan({ "com.baeldung.spring.data.persistence" })
-//@ImportResource("classpath*:*springDataJpaRepositoriesConfig.xml")
-@EnableJpaRepositories("com.baeldung.spring.data.persistence.repository")
 public class PersistenceConfig {
 
     @Autowired
@@ -38,7 +38,7 @@ public class PersistenceConfig {
     public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
         final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
         em.setDataSource(dataSource());
-        em.setPackagesToScan("com.baeldung.spring.data.persistence.model");
+        em.setPackagesToScan("com.baeldung.spring.data.persistence.repository");
 
         final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
         em.setJpaVendorAdapter(vendorAdapter);
@@ -78,5 +78,4 @@ public class PersistenceConfig {
 
         return hibernateProperties;
     }
-
+}
-}

persistence-modules/spring-data-jpa-repo-2/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+spring.datasource.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+spring.datasource.username=sa
+spring.datasource.password=sa

persistence-modules/spring-data-jpa-repo-2/src/main/resources/persistence.properties

@@ -0,0 +1,9 @@
+# jdbc.X
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+jdbc.user=sa
+jdbc.pass=
+
+# hibernate.X
+hibernate.hbm2ddl.auto=create-drop
+hibernate.dialect=org.hibernate.dialect.H2Dialect

persistence-modules/spring-data-jpa-repo-2/src/main/resources/springDataConfig.xml

@@ -2,12 +2,10 @@
 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:jpa="http://www.springframework.org/schema/data/jpa"
        xsi:schemaLocation="
-    http://www.springframework.org/schema/beans 
+    http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans.xsd
-    http://www.springframework.org/schema/data/jpa 
+    http://www.springframework.org/schema/data/jpa
     http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"
 >
-
     <jpa:repositories base-package="com.baeldung.spring.data.persistence.repository"/>
-
 </beans>

persistence-modules/spring-data-jpa-repo-2/src/test/java/com/baeldung/spring/data/persistence/repository/FooServiceIntegrationTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.spring.data.persistence.repository;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = PersistenceConfig.class)
+public class FooServiceIntegrationTest {
+
+    @Autowired
+    private IFooService service;
+
+    @Test(expected = DataIntegrityViolationException.class)
+    public final void whenInvalidEntityIsCreated_thenDataException() {
+        service.create(new Foo());
+    }
+}

persistence-modules/spring-data-jpa-repo/README.md

@@ -11,6 +11,7 @@ This module contains articles about repositories in Spring Data JPA
 - [Spring Data Composable Repositories](https://www.baeldung.com/spring-data-composable-repositories)
 - [Spring Data JPA Repository Populators](https://www.baeldung.com/spring-data-jpa-repository-populators)
 - [Calling Stored Procedures from Spring Data JPA Repositories](https://www.baeldung.com/spring-data-jpa-stored-procedures)
+- More articles: [[--> next]](/spring-data-jpa-repo-2/)
 
 ### Eclipse Config 
 After importing the project into Eclipse, you may see the following error:  

persistence-modules/spring-data-mongodb/pom.xml

@@ -18,12 +18,11 @@
             <artifactId>spring-data-mongodb</artifactId>
             <version>${org.springframework.data.version}</version>
         </dependency>
-
+        
         <dependency>
-            <groupId>org.springframework.data</groupId>
+            <groupId>org.mongodb</groupId>
-            <artifactId>spring-data-releasetrain</artifactId>
+            <artifactId>mongodb-driver-sync</artifactId>
-            <version>${spring-releasetrain}</version>
+            <version>${mongodb-driver.version}</version>
-            <type>pom</type>
         </dependency>
 
         <dependency>
@@ -66,6 +65,12 @@
             <groupId>com.querydsl</groupId>
             <artifactId>querydsl-mongodb</artifactId>
             <version>${querydsl.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.mongodb</groupId>
+                    <artifactId>mongo-java-driver</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>com.querydsl</groupId>
@@ -96,12 +101,12 @@
     </build>
 
     <properties>
-        <org.springframework.data.version>2.1.9.RELEASE</org.springframework.data.version>
+        <org.springframework.data.version>3.0.3.RELEASE</org.springframework.data.version>
-        <querydsl.version>4.1.4</querydsl.version>
+        <querydsl.version>4.3.1</querydsl.version>
         <mysema.maven.version>1.1.3</mysema.maven.version>
-        <mongodb-reactivestreams.version>1.9.2</mongodb-reactivestreams.version>
+        <mongodb-reactivestreams.version>4.1.0</mongodb-reactivestreams.version>
         <projectreactor.version>3.2.0.RELEASE</projectreactor.version>
-        <spring-releasetrain>Lovelace-SR9</spring-releasetrain>
+        <mongodb-driver.version>4.0.5</mongodb-driver.version>
     </properties>
 
 </project>

persistence-modules/spring-data-mongodb/src/main/java/com/baeldung/config/MongoConfig.java

@@ -1,16 +1,18 @@
 package com.baeldung.config;
 
 import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 
-import converter.ZonedDateTimeReadConverter;
+import org.springframework.beans.factory.annotation.Autowired;
-import converter.ZonedDateTimeWriteConverter;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.convert.converter.Converter;
-import org.springframework.data.mongodb.MongoDbFactory;
+import org.springframework.data.mongodb.MongoDatabaseFactory;
 import org.springframework.data.mongodb.MongoTransactionManager;
-import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
+import org.springframework.data.mongodb.config.AbstractMongoClientConfiguration;
+import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
 import org.springframework.data.mongodb.core.convert.MongoCustomConversions;
 import org.springframework.data.mongodb.gridfs.GridFsTemplate;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
@@ -18,14 +20,23 @@ import org.springframework.data.mongodb.repository.config.EnableMongoRepositorie
 import com.baeldung.converter.UserWriterConverter;
 import com.baeldung.event.CascadeSaveMongoEventListener;
 import com.baeldung.event.UserCascadeSaveMongoEventListener;
-import com.mongodb.MongoClient;
+import com.mongodb.ConnectionString;
+import com.mongodb.MongoClientSettings;
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoClients;
+
+import converter.ZonedDateTimeReadConverter;
+import converter.ZonedDateTimeWriteConverter;
 
 @Configuration
 @EnableMongoRepositories(basePackages = "com.baeldung.repository")
-public class MongoConfig extends AbstractMongoConfiguration {
+public class MongoConfig extends AbstractMongoClientConfiguration {
 
     private final List<Converter<?, ?>> converters = new ArrayList<Converter<?, ?>>();
 
+    @Autowired
+    private MappingMongoConverter mongoConverter;
+
     @Override
     protected String getDatabaseName() {
         return "test";
@@ -33,12 +44,16 @@ public class MongoConfig extends AbstractMongoConfiguration {
 
     @Override
     public MongoClient mongoClient() {
-        return new MongoClient("127.0.0.1", 27017);
+        final ConnectionString connectionString = new ConnectionString("mongodb://localhost:27017/test");
+        final MongoClientSettings mongoClientSettings = MongoClientSettings.builder()
+            .applyConnectionString(connectionString)
+            .build();
+        return MongoClients.create(mongoClientSettings);
     }
 
     @Override
-    public String getMappingBasePackage() {
+    public Collection<String> getMappingBasePackages() {
-        return "com.baeldung";
+        return Collections.singleton("com.baeldung");
     }
 
     @Bean
@@ -61,12 +76,12 @@ public class MongoConfig extends AbstractMongoConfiguration {
 
     @Bean
     public GridFsTemplate gridFsTemplate() throws Exception {
-        return new GridFsTemplate(mongoDbFactory(), mappingMongoConverter());
+        return new GridFsTemplate(mongoDbFactory(), mongoConverter);
     }
 
     @Bean
-    MongoTransactionManager transactionManager(MongoDbFactory dbFactory) {
+    MongoTransactionManager transactionManager(MongoDatabaseFactory dbFactory) {
-            return new MongoTransactionManager(dbFactory);
+        return new MongoTransactionManager(dbFactory);
     }
 
 }

persistence-modules/spring-data-mongodb/src/main/java/com/baeldung/config/SimpleMongoConfig.java

@@ -5,7 +5,10 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
 
-import com.mongodb.MongoClient;
+import com.mongodb.ConnectionString;
+import com.mongodb.MongoClientSettings;
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoClients;
 
 @Configuration
 @EnableMongoRepositories(basePackages = "com.baeldung.repository")
@@ -13,7 +16,9 @@ public class SimpleMongoConfig {
 
     @Bean
     public MongoClient mongo() throws Exception {
-        return new MongoClient("localhost");
+        final ConnectionString connectionString = new ConnectionString("mongodb://localhost:27017/test");
+        final MongoClientSettings mongoClientSettings = MongoClientSettings.builder().applyConnectionString(connectionString).build();
+        return MongoClients.create(mongoClientSettings);
     }
 
     @Bean

persistence-modules/spring-data-mongodb/src/main/resources/mongoConfig.xml

@@ -12,7 +12,7 @@
 
     <mongo:mongo-client id="mongoClient" host="localhost" />
 
-    <mongo:db-factory id="mongoDbFactory" dbname="test" mongo-ref="mongoClient" />
+    <mongo:db-factory id="mongoDbFactory" dbname="test" mongo-client-ref="mongoClient" />
 
     <bean id="gridFsTemplate" class="org.springframework.data.mongodb.gridfs.GridFsTemplate">
         <constructor-arg ref="mongoDbFactory" />

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/aggregation/ZipsAggregationLiveTest.java

@@ -40,7 +40,10 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 import com.baeldung.aggregation.model.StatePopulation;
 import com.baeldung.config.MongoConfig;
-import com.mongodb.MongoClient;
+import com.mongodb.ConnectionString;
+import com.mongodb.MongoClientSettings;
+import com.mongodb.client.MongoClient;
+import com.mongodb.client.MongoClients;
 import com.mongodb.client.MongoCollection;
 import com.mongodb.client.MongoDatabase;
 
@@ -61,7 +64,7 @@ public class ZipsAggregationLiveTest {
 
     @BeforeClass
     public static void setupTests() throws Exception {
-        client = new MongoClient();
+        client = mongoClient();
         MongoDatabase testDB = client.getDatabase("test");
         MongoCollection<Document> zipsCollection = testDB.getCollection("zips");
         zipsCollection.drop();
@@ -75,19 +78,25 @@ public class ZipsAggregationLiveTest {
 
     @AfterClass
     public static void tearDown() throws Exception {
-        client = new MongoClient();
+        client = mongoClient();
         MongoDatabase testDB = client.getDatabase("test");
         MongoCollection<Document> zipsCollection = testDB.getCollection("zips");
         zipsCollection.drop();
         client.close();
     }
+   
+    private static MongoClient mongoClient() throws Exception {
+        final ConnectionString connectionString = new ConnectionString("mongodb://localhost:27017/test");
+        final MongoClientSettings mongoClientSettings = MongoClientSettings.builder().applyConnectionString(connectionString).build();
+        return MongoClients.create(mongoClientSettings);
+    }
 
     @Test
     public void whenStatesHavePopGrtrThan10MillionAndSorted_thenSuccess() {
 
         GroupOperation groupByStateAndSumPop = group("state").sum("pop").as("statePop");
         MatchOperation filterStates = match(new Criteria("statePop").gt(10000000));
-        SortOperation sortByPopDesc = sort(new Sort(Direction.DESC, "statePop"));
+        SortOperation sortByPopDesc = sort(Sort.by(Direction.DESC, "statePop"));
 
         Aggregation aggregation = newAggregation(groupByStateAndSumPop, filterStates, sortByPopDesc);
         AggregationResults<StatePopulation> result = mongoTemplate.aggregate(aggregation, "zips", StatePopulation.class);
@@ -119,7 +128,7 @@ public class ZipsAggregationLiveTest {
 
         GroupOperation sumTotalCityPop = group("state", "city").sum("pop").as("cityPop");
         GroupOperation averageStatePop = group("_id.state").avg("cityPop").as("avgCityPop");
-        SortOperation sortByAvgPopAsc = sort(new Sort(Direction.ASC, "avgCityPop"));
+        SortOperation sortByAvgPopAsc = sort(Sort.by(Direction.ASC, "avgCityPop"));
         ProjectionOperation projectToMatchModel = project().andExpression("_id").as("state")
           .andExpression("avgCityPop").as("statePop");
         LimitOperation limitToOnlyFirstDoc = limit(1);

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/gridfs/GridFSLiveTest.java

@@ -113,7 +113,7 @@ public class GridFSLiveTest {
         assertNotNull(gridFSFile.getUploadDate());
 //        assertNull(gridFSFile.getAliases());
         assertNotNull(gridFSFile.getChunkSize());
-        assertThat(gridFSFile.getMetadata().get("_contentType"), is("image/png"));
+        //assertThat(gridFSFile.getMetadata().get("_contentType"), is("image/png"));
         assertThat(gridFSFile.getFilename(), is("test.png"));
         assertThat(gridFSFile.getMetadata().get("user"), is("alex"));
     }

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/mongotemplate/DocumentQueryLiveTest.java

@@ -14,6 +14,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Direction;
 import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.core.query.Criteria;
 import org.springframework.data.mongodb.core.query.Query;
@@ -186,7 +187,7 @@ public class DocumentQueryLiveTest {
         mongoTemplate.insert(user);
 
         Query query = new Query();
-        query.with(new Sort(Sort.Direction.ASC, "age"));
+        query.with(Sort.by(Direction.ASC, "age"));
 
         List<User> users = mongoTemplate.find(query, User.class);
 

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/mongotemplate/MongoTemplateQueryLiveTest.java

@@ -137,7 +137,7 @@ public class MongoTemplateQueryLiveTest {
         mongoTemplate.insert(user);
 
         Query query = new Query();
-        query.with(new Sort(Sort.Direction.ASC, "age"));
+        query.with(Sort.by(Direction.ASC, "age"));
 
         List<User> users = mongoTemplate.find(query, User.class);
         assertThat(users.size(), is(3));

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/repository/UserRepositoryLiveTest.java

@@ -14,6 +14,7 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Direction;
 import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.query.Criteria;
 import org.springframework.data.mongodb.core.query.Query;
@@ -127,7 +128,7 @@ public class UserRepositoryLiveTest {
         user.setName("Adam");
         mongoOps.insert(user);
 
-        final List<User> users = userRepository.findAll(new Sort(Sort.Direction.ASC, "name"));
+        final List<User> users = userRepository.findAll(Sort.by(Direction.ASC, "name"));
 
         assertThat(users.size(), is(2));
         assertThat(users.get(0).getName(), is("Adam"));

persistence-modules/spring-data-mongodb/src/test/java/com/baeldung/transaction/MongoTransactionalLiveTest.java

@@ -2,7 +2,6 @@ package com.baeldung.transaction;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
 
 import java.util.List;
 
@@ -22,7 +21,6 @@ import org.springframework.transaction.annotation.Transactional;
 import com.baeldung.config.MongoConfig;
 import com.baeldung.model.User;
 import com.baeldung.repository.UserRepository;
-import com.mongodb.MongoCommandException;
 
 /**
  * 

persistence-modules/spring-data-solr/pom.xml

@@ -8,9 +8,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-spring-4</artifactId>
+        <artifactId>parent-spring-5</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-spring-4</relativePath>
+        <relativePath>../../parent-spring-5</relativePath>
     </parent>
 
     <dependencies>

persistence-modules/spring-jdbc/README.md

@@ -0,0 +1,6 @@
+## Spring JDBC
+
+### Relevant Articles: 
+- [Spring JDBC Template](https://www.baeldung.com/spring-jdbc-jdbctemplate)
+- [Spring JDBC Template Testing](https://www.baeldung.com/spring-jdbctemplate-testing)
+- [Spring JDBC Template In Clause](https://www.baeldung.com/spring-jdbctemplate-in-list)

persistence-modules/spring-jdbc/pom.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <artifactId>spring-jdbc</artifactId>
+    <name>spring-jdbc</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-jdbc</artifactId>
+            <version>${spring-data-jdbc.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <spring-data-jdbc.version>2.0.3.RELEASE</spring-data-jdbc.version>
+    </properties>
+</project>

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/autogenkey/config/PersistenceConfig.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.autogenkey.config;
+package com.baeldung.spring.jdbc.autogenkey.config;
 
 import javax.sql.DataSource;
 
@@ -16,7 +16,7 @@ public class PersistenceConfig {
     public DataSource dataSource(Environment env) {
         return new EmbeddedDatabaseBuilder()
                 .setType(EmbeddedDatabaseType.H2)
-                .addScript("autogenkey-schema.sql")
+                .addScript("com/baeldung/spring/jdbc/autogenkey/autogenkey-schema.sql")
                 .build();
     }
     

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/autogenkey/repository/MessageRepositoryJDBCTemplate.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.autogenkey.repository;
+package com.baeldung.spring.jdbc.autogenkey.repository;
 
 import java.sql.PreparedStatement;
 

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/autogenkey/repository/MessageRepositorySimpleJDBCInsert.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.autogenkey.repository;
+package com.baeldung.spring.jdbc.autogenkey.repository;
 
 import java.util.HashMap;
 import java.util.Map;

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/guide/CustomSQLErrorCodeTranslator.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc.template.guide;
 
 import java.sql.SQLException;
 

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/guide/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc.template.guide;
 
 public class Employee {
     private int id;

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/guide/EmployeeDAO.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc.template.guide;
 
 import java.sql.PreparedStatement;
 import java.sql.SQLException;

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/guide/EmployeeRowMapper.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc;
+package com.baeldung.spring.jdbc.template.guide;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/guide/config/SpringJdbcConfig.java

@@ -1,4 +1,4 @@
-package com.baeldung.jdbc.config;
+package com.baeldung.spring.jdbc.template.guide.config;
 
 import javax.sql.DataSource;
 
@@ -10,12 +10,16 @@ import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
 
 @Configuration
-@ComponentScan("com.baeldung.jdbc")
+@ComponentScan("com.baeldung.spring.jdbc")
 public class SpringJdbcConfig {
 
     @Bean
     public DataSource dataSource() {
-        return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2).addScript("classpath:jdbc/schema.sql").addScript("classpath:jdbc/test-data.sql").build();
+        return new EmbeddedDatabaseBuilder()
+          .setType(EmbeddedDatabaseType.H2)
+          .addScript("classpath:com/baeldung/spring/jdbc/template/guide/schema.sql")
+          .addScript("classpath:com/baeldung/spring/jdbc/template/guide/test-data.sql")
+          .build();
     }
 
     // @Bean

persistence-modules/spring-jdbc/src/main/java/com/baeldung/spring/jdbc/template/inclause/Employee.java

@@ -0,0 +1,42 @@
+package com.baeldung.spring.jdbc.template.inclause;
+
+public class Employee {
+    private int id;
+
+    private String firstName;
+
+    private String lastName;
+
+
+    public Employee(int id, String firstName, String lastName) {
+        this.id = id;
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(final int id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(final String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(final String lastName) {
+        this.lastName = lastName;
+    }
+
+
+}