Merge remote-tracking branch 'upstream/master'

aws-lambda/README.md

@@ -5,3 +5,4 @@ This module contains articles about AWS Lambda
 ### Relevant Articles: 
 - [Using AWS Lambda with API Gateway](https://www.baeldung.com/aws-lambda-api-gateway)
 - [Introduction to AWS Serverless Application Model](https://www.baeldung.com/aws-serverless)
+- [How to Implement Hibernate in an AWS Lambda Function in Java](https://www.baeldung.com/java-aws-lambda-hibernate)

core-groovy-strings/pom.xml

@@ -0,0 +1,122 @@
+<?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-groovy-strings</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>core-groovy-strings</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy</artifactId>
+            <version>${groovy.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-all</artifactId>
+            <version>${groovy-all.version}</version>
+            <type>pom</type>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-dateutil</artifactId>
+            <version>${groovy.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-sql</artifactId>
+            <version>${groovy-sql.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hsqldb</groupId>
+            <artifactId>hsqldb</artifactId>
+            <version>${hsqldb.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.spockframework</groupId>
+            <artifactId>spock-core</artifactId>
+            <version>${spock-core.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.gmavenplus</groupId>
+                <artifactId>gmavenplus-plugin</artifactId>
+                <version>${gmavenplus-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>addSources</goal>
+                            <goal>addTestSources</goal>
+                            <goal>compile</goal>
+                            <goal>compileTests</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-failsafe-plugin</artifactId>
+                <version>${maven-failsafe-plugin.version}</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.junit.platform</groupId>
+                        <artifactId>junit-platform-surefire-provider</artifactId>
+                        <version>${junit.platform.version}</version>
+                    </dependency>
+                </dependencies>
+                <executions>
+                    <execution>
+                        <id>junit5</id>
+                        <goals>
+                            <goal>integration-test</goal>
+                            <goal>verify</goal>
+                        </goals>
+                        <configuration>
+                            <includes>
+                                <include>**/*Test5.java</include>
+                            </includes>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>central</id>
+            <url>https://jcenter.bintray.com</url>
+        </repository>
+    </repositories>
+
+    <properties>
+        <junit.platform.version>1.0.0</junit.platform.version>
+        <groovy.version>2.5.6</groovy.version>
+        <groovy-all.version>2.5.6</groovy-all.version>
+        <groovy-sql.version>2.5.6</groovy-sql.version>
+        <hsqldb.version>2.4.0</hsqldb.version>
+        <spock-core.version>1.1-groovy-2.4</spock-core.version>
+        <gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
+    </properties>
+
+</project>

core-groovy-strings/src/test/groovy/com/baeldung/removeprefix/RemovePrefixTest.groovy

@@ -0,0 +1,70 @@
+package com.baeldung.removeprefix
+
+import org.junit.Assert
+import org.junit.Test
+
+class RemovePrefixTest {
+
+
+    @Test
+    public void whenCasePrefixIsRemoved_thenReturnTrue() {
+        def trimPrefix = {
+            it.startsWith('Groovy-') ? it.minus('Groovy-') : it
+        }
+        
+        def actual = trimPrefix("Groovy-Tutorials at Baeldung")
+        def expected = "Tutorials at Baeldung"
+
+        Assert.assertEquals(expected, actual)
+    }
+
+    @Test
+    public void whenPrefixIsRemoved_thenReturnTrue() {
+
+        String prefix = "groovy-"
+        String trimPrefix = "Groovy-Tutorials at Baeldung"
+        def actual;
+        if(trimPrefix.startsWithIgnoreCase(prefix)) {
+            actual = trimPrefix.substring(prefix.length())
+        }
+        
+        def expected = "Tutorials at Baeldung"
+
+        Assert.assertEquals(expected, actual)
+    }
+
+    @Test
+    public void whenPrefixIsRemovedUsingRegex_thenReturnTrue() {
+
+        def regex = ~"^([Gg])roovy-"
+        String trimPrefix = "Groovy-Tutorials at Baeldung"
+        String actual = trimPrefix - regex
+        
+        def expected = "Tutorials at Baeldung"
+
+        Assert.assertEquals(expected, actual)
+    }
+
+    @Test 
+    public void whenPrefixIsRemovedUsingReplaceFirst_thenReturnTrue() {
+        def regex = ~"^groovy" 
+        String trimPrefix = "groovyTutorials at Baeldung's groovy page" 
+        String actual = trimPrefix.replaceFirst(regex, "")
+        
+        def expected = "Tutorials at Baeldung's groovy page"
+        
+        Assert.assertEquals(expected, actual)
+    }
+
+    @Test
+    public void whenPrefixIsRemovedUsingReplaceAll_thenReturnTrue() {
+
+        String trimPrefix = "groovyTutorials at Baeldung groovy"
+        String actual = trimPrefix.replaceAll(/^groovy/, "")
+        
+        def expected = "Tutorials at Baeldung groovy"
+
+        Assert.assertEquals(expected, actual)
+    }
+
+}

core-java-modules/core-java-10/src/test/java/com/baeldung/AppUnitTest.java

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

core-java-modules/core-java-12/src/test/java/com/baeldung/string/StringAPIUnitTest.java

@@ -5,7 +5,7 @@ import static org.hamcrest.MatcherAssert.assertThat;
 
 import org.junit.Test;
 
-public class StringAPITest {
+public class StringAPIUnitTest {
 
     @Test
     public void whenPositiveArgument_thenReturnIndentedString() {

core-java-modules/core-java-14/src/test/java/com/baeldung/java14/record/PersonUnitTest.java

@@ -7,7 +7,7 @@ import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
 
-public class PersonTest {
+public class PersonUnitTest {
 
     @Test
     public void givenSameNameAndAddress_whenEquals_thenPersonsEqual() {

core-java-modules/core-java-9/pom.xml

@@ -44,6 +44,16 @@
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.11</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.7</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -77,6 +87,7 @@
         <maven.compiler.target>1.9</maven.compiler.target>
         <guava.version>25.1-jre</guava.version>
         <commons-collections4.version>4.1</commons-collections4.version>
+        <commons-collections3.version>3.2.2</commons-collections3.version>
     </properties>
 
 </project>

core-java-modules/core-java-9/src/test/java/com/baeldung/java9/methodhandles/MethodHandlesUnitTest.java

@@ -17,7 +17,7 @@ import org.junit.Test;
 /**
  * Test case for the {@link MethodHandles} API
  */
-public class MethodHandlesTest {
+public class MethodHandlesUnitTest {
 
     @Test
     public void givenConcatMethodHandle_whenInvoked_thenCorrectlyConcatenated() throws Throwable {

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

@@ -6,3 +6,4 @@ This module contains complete guides about arrays in Java
 - [Arrays in Java: A Reference Guide](https://www.baeldung.com/java-arrays-guide)
 - [Guide to the java.util.Arrays Class](https://www.baeldung.com/java-util-arrays)
 - [What is \[Ljava.lang.Object;?](https://www.baeldung.com/java-tostring-array)
+- [Guide to ArrayStoreException](https://www.baeldung.com/java-arraystoreexception)

core-java-modules/core-java-date-operations-1/src/test/java/com/baeldung/date/DateDiffUnitTest.java

@@ -1,6 +1,8 @@
 package com.baeldung.date;
 
-import static org.junit.Assert.assertEquals;
+import org.joda.time.Days;
+import org.joda.time.Minutes;
+import org.junit.Test;
 
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
@@ -16,7 +18,7 @@ import java.util.Locale;
 import java.util.TimeZone;
 import java.util.concurrent.TimeUnit;
 
-import org.junit.Test;
+import static org.junit.Assert.*;
 
 public class DateDiffUnitTest {
 
@@ -29,18 +31,39 @@ public class DateDiffUnitTest {
         long diffInMillies = Math.abs(secondDate.getTime() - firstDate.getTime());
         long diff = TimeUnit.DAYS.convert(diffInMillies, TimeUnit.MILLISECONDS);
 
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
     }
 
     @Test
-    public void givenTwoDatesInJava8_whenDifferentiating_thenWeGetSix() {
+    public void givenTwoDatesInJava8_whenUsingPeriodGetDays_thenWorks() {
-        LocalDate now = LocalDate.now();
+        LocalDate aDate = LocalDate.of(2020, 9, 11);
-        LocalDate sixDaysBehind = now.minusDays(6);
+        LocalDate sixDaysBehind = aDate.minusDays(6);
 
-        Period period = Period.between(now, sixDaysBehind);
+        Period period = Period.between(aDate, sixDaysBehind);
         int diff = Math.abs(period.getDays());
 
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
+    }
+
+    @Test
+    public void givenTwoDatesInJava8_whenUsingPeriodGetDays_thenDoesNotWork() {
+        LocalDate aDate = LocalDate.of(2020, 9, 11);
+        LocalDate sixtyDaysBehind = aDate.minusDays(60);
+        Period period = Period.between(aDate, sixtyDaysBehind);
+        int diff = Math.abs(period.getDays());
+        //not equals
+        assertNotEquals(60, diff);
+    }
+
+    @Test
+    public void givenTwoDatesInJava8_whenUsingPeriod_thenWeGet0Year1Month29Days() {
+        LocalDate aDate = LocalDate.of(2020, 9, 11);
+        LocalDate sixtyDaysBehind = aDate.minusDays(60);
+        Period period = Period.between(aDate, sixtyDaysBehind);
+        int years = Math.abs(period.getYears());
+        int months = Math.abs(period.getMonths());
+        int days = Math.abs(period.getDays());
+        assertArrayEquals(new int[] { 0, 1, 29 }, new int[] { years, months, days });
     }
 
     @Test
@@ -51,7 +74,7 @@ public class DateDiffUnitTest {
         Duration duration = Duration.between(now, sixMinutesBehind);
         long diff = Math.abs(duration.toMinutes());
 
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
     }
 
     @Test
@@ -61,7 +84,7 @@ public class DateDiffUnitTest {
 
         long diff = ChronoUnit.SECONDS.between(now, tenSecondsLater);
 
-        assertEquals(diff, 10);
+        assertEquals(10, diff);
     }
 
     @Test
@@ -69,9 +92,9 @@ public class DateDiffUnitTest {
         LocalDateTime ldt = LocalDateTime.now();
         ZonedDateTime now = ldt.atZone(ZoneId.of("America/Montreal"));
         ZonedDateTime sixDaysBehind = now.withZoneSameInstant(ZoneId.of("Asia/Singapore"))
-            .minusDays(6);
+                                         .minusDays(6);
         long diff = ChronoUnit.DAYS.between(sixDaysBehind, now);
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
     }
 
     @Test
@@ -81,7 +104,7 @@ public class DateDiffUnitTest {
 
         long diff = now.until(tenSecondsLater, ChronoUnit.SECONDS);
 
-        assertEquals(diff, 10);
+        assertEquals(10, diff);
     }
 
     @Test
@@ -89,10 +112,9 @@ public class DateDiffUnitTest {
         org.joda.time.LocalDate now = org.joda.time.LocalDate.now();
         org.joda.time.LocalDate sixDaysBehind = now.minusDays(6);
 
-        org.joda.time.Period period = new org.joda.time.Period(now, sixDaysBehind);
+        long diff = Math.abs(Days.daysBetween(now, sixDaysBehind).getDays());
-        long diff = Math.abs(period.getDays());
 
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
     }
 
     @Test
@@ -100,8 +122,9 @@ public class DateDiffUnitTest {
         org.joda.time.LocalDateTime now = org.joda.time.LocalDateTime.now();
         org.joda.time.LocalDateTime sixMinutesBehind = now.minusMinutes(6);
 
-        org.joda.time.Period period = new org.joda.time.Period(now, sixMinutesBehind);
+        long diff = Math.abs(Minutes.minutesBetween(now, sixMinutesBehind).getMinutes());
-        long diff = Math.abs(period.getDays());
+        assertEquals(6, diff);
+
     }
 
     @Test
@@ -111,6 +134,6 @@ public class DateDiffUnitTest {
 
         long diff = Math.abs(now.numDaysFrom(sixDaysBehind));
 
-        assertEquals(diff, 6);
+        assertEquals(6, diff);
     }
-}
+}

core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/timestamp/TimestampToStringConverterUnitTest.java

@@ -6,7 +6,7 @@ import org.junit.jupiter.api.Test;
 import java.sql.Timestamp;
 import java.time.format.DateTimeFormatter;
 
-public class TimestampToStringConverterTest {
+public class TimestampToStringConverterUnitTest {
 
     @Test
     public void givenDatePattern_whenFormatting_thenResultingStringIsCorrect() {

core-java-modules/core-java-exceptions-3/README.md

@@ -1,3 +1,5 @@
 ### Relevant Articles:
 
 - [NoSuchMethodError in Java](https://www.baeldung.com/java-nosuchmethod-error)
+- [IllegalArgumentException or NullPointerException for a Null Parameter?](https://www.baeldung.com/java-illegalargumentexception-or-nullpointerexception)
+- [IllegalMonitorStateException in Java](https://www.baeldung.com/java-illegalmonitorstateexception)

core-java-modules/core-java-io-3/README.md

@@ -9,4 +9,6 @@ This module contains articles about core Java input and output (IO)
 - [Check If a File or Directory Exists in Java](https://www.baeldung.com/java-file-directory-exists)
 - [Copy a Directory in Java](https://www.baeldung.com/java-copy-directory)
 - [Java Files Open Options](https://www.baeldung.com/java-file-options)
+- [Creating Temporary Directories in Java](https://www.baeldung.com/java-temp-directories)
+- [Reading a Line at a Given Line Number From a File in Java](https://www.baeldung.com/java-read-line-at-number)
 - [[<-- Prev]](/core-java-modules/core-java-io-2)

core-java-modules/core-java-io-3/src/test/java/com/baeldung/emptiness/DirectoryEmptinessUnitTest.java

@@ -4,6 +4,7 @@ import org.junit.Test;
 
 import java.io.File;
 import java.io.IOException;
+import java.net.URISyntaxException;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -20,8 +21,8 @@ public class DirectoryEmptinessUnitTest {
     }
 
     @Test
-    public void givenPath_whenNotDirectory_thenReturnsFalse() throws IOException {
+    public void givenPath_whenNotDirectory_thenReturnsFalse() throws IOException, URISyntaxException {
-        Path aFile = Paths.get(getClass().getResource("/notDir.txt").getPath());
+        Path aFile = Paths.get(getClass().getResource("/notDir.txt").toURI());
         assertThat(isEmpty(aFile)).isFalse();
     }
 

core-java-modules/core-java-io-3/src/test/java/com/baeldung/existence/ExistenceUnitTest.java

@@ -4,10 +4,7 @@ import org.junit.Test;
 
 import java.io.File;
 import java.io.IOException;
-import java.nio.file.Files;
+import java.nio.file.*;
-import java.nio.file.LinkOption;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.concurrent.ThreadLocalRandom;
 
 import static org.junit.Assert.assertFalse;
@@ -47,8 +44,18 @@ public class ExistenceUnitTest {
     public void givenSymbolicLink_whenTargetDoesNotExists_thenFollowOrNotBasedOnTheOptions() throws IOException {
         Path target = Files.createTempFile("baeldung", "target");
         Path symbol = Paths.get("test-link-" + ThreadLocalRandom.current().nextInt());
+        Path symbolicLink = null;
+
+        try {
+            symbolicLink = Files.createSymbolicLink(symbol, target);
+        } catch (FileSystemException ex) {
+            System.out.println("Your OS security policy prevents the current user from creating symbolic links.\n" +
+                    "Most probably you're running Windows with UAC.\n" +
+                    "If this is the case, please see - https://docs.microsoft.com/en-us/windows/security/threat-protection/security-policy-settings/create-symbolic-links\n" +
+                    "You must change your security settings to run this test under Windows.");
+            return;
+        }
 
-        Path symbolicLink = Files.createSymbolicLink(symbol, target);
         assertTrue(Files.exists(symbolicLink));
         assertTrue(Files.isSymbolicLink(symbolicLink));
         assertFalse(Files.isSymbolicLink(target));

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

@@ -4,6 +4,7 @@ import org.apache.commons.io.FileUtils;
 import org.junit.Test;
 
 import java.io.IOException;
+import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -66,10 +67,16 @@ public class TemporaryDirectoriesUnitTest {
 
     @Test
     public void givenTempDirWithPrefixWithFileAttrs_whenCreatePlainJava_thenAttributesAreSet() throws IOException {
-        final FileAttribute<Set<PosixFilePermission>> attrs = PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("r--------"));
+        boolean isPosix = FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
 
-        final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix", attrs);
+        if(!isPosix){
-        assertThat(tmpdir.toFile().getPath()).startsWith("target");
+            System.out.println("You must be under a Posix Compliant Filesystem to run this test.");
-        assertThat(tmpdir.toFile().canWrite()).isFalse();
+        } else {
+            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-jpms/decoupling-pattern1/consumermodule/pom.xml

@@ -17,7 +17,7 @@
     <dependencies>
         <dependency>
             <groupId>com.baeldung.servicemodule</groupId>
-            <artifactId>servicemodule</artifactId>
+            <artifactId>servicemodule1</artifactId>
             <version>${servicemodule.version}</version>
         </dependency>
     </dependencies>

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/pom.xml

@@ -4,7 +4,8 @@
     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>servicemodule</artifactId>
+    <groupId>com.baeldung.servicemodule</groupId>
+    <artifactId>servicemodule1</artifactId>
     <packaging>jar</packaging>
 
     <parent>

core-java-modules/core-java-jpms/decoupling-pattern2/providermodule/pom.xml

@@ -17,7 +17,7 @@
     <dependencies>
         <dependency>
             <groupId>com.baeldung.servicemodule</groupId>
-            <artifactId>servicemodule</artifactId>
+            <artifactId>servicemodule2</artifactId>
             <version>${servicemodule.version}</version>
         </dependency>
     </dependencies>

core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml

@@ -4,7 +4,8 @@
     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>servicemodule</artifactId>
+    <groupId>com.baeldung.servicemodule</groupId>
+    <artifactId>servicemodule2</artifactId>
     <version>1.0</version>
 
     <parent>

core-java-modules/core-java-lang-3/README.md

@@ -5,4 +5,5 @@ This module contains articles about core features in the Java language
 - [Class.isInstance vs Class.isAssignableFrom](https://www.baeldung.com/java-isinstance-isassignablefrom)
 - [Converting a Java String Into a Boolean](https://www.baeldung.com/java-string-to-boolean)
 - [When are Static Variables Initialized in Java?](https://www.baeldung.com/java-static-variables-initialization)
+- [Checking if a Class Exists in Java](https://www.baeldung.com/java-check-class-exists)
 - [[<-- Prev]](/core-java-modules/core-java-lang-2)

core-java-modules/core-java-lang-math-2/README.md

@@ -13,4 +13,5 @@
 - [Convert Latitude and Longitude to a 2D Point in Java](https://www.baeldung.com/java-convert-latitude-longitude)
 - [Debugging with Eclipse](https://www.baeldung.com/eclipse-debugging)
 - [Matrix Multiplication in Java](https://www.baeldung.com/java-matrix-multiplication)
+- [Largest Power of 2 That Is Less Than the Given Number](https://www.baeldung.com/java-largest-power-of-2-less-than-number)
 - More articles: [[<-- Prev]](/core-java-modules/core-java-lang-math)

core-java-modules/core-java-os/src/test/java/com/baeldung/core/pwd/CurrentDirectoryFetcherUnitTest.java

@@ -4,7 +4,7 @@ import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
 
-public class CurrentDirectoryFetcherTest {
+public class CurrentDirectoryFetcherUnitTest {
 
     private static final String CURRENT_DIR = "core-java-os";
 

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/check/staticmethods/StaticUtility.java

@@ -0,0 +1,19 @@
+package com.baeldung.reflection.check.staticmethods;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+public class StaticUtility {
+
+    public static String getAuthorName() {
+        return "Umang Budhwar";
+    }
+
+    public static LocalDate getLocalDate() {
+        return LocalDate.now();
+    }
+
+    public static LocalTime getLocalTime() {
+        return LocalTime.now();
+    }
+}

core-java-modules/core-java-reflection-2/src/test/java/com/baeldung/reflection/check/staticmethods/StaticUtilityUnitTest.java

@@ -0,0 +1,30 @@
+package com.baeldung.reflection.check.staticmethods;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class StaticUtilityUnitTest {
+
+    @Test
+    void whenCheckStaticMethod_ThenSuccess() throws Exception {
+        Method method = StaticUtility.class.getMethod("getAuthorName", null);
+        Assertions.assertTrue(Modifier.isStatic(method.getModifiers()));
+    }
+
+    @Test
+    void whenCheckAllStaticMethods_thenSuccess() {
+        List<Method> methodList = Arrays.asList(StaticUtility.class.getMethods())
+          .stream()
+          .filter(method -> Modifier.isStatic(method.getModifiers()))
+          .collect(Collectors.toList());
+        Assertions.assertEquals(3, methodList.size());
+    }
+
+}

core-java-modules/core-java-security-2/src/test/java/com/baeldung/cipher/AvailableCiphersUnitTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.cipher;
+
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.security.Provider;
+import java.security.Security;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class AvailableCiphersUnitTest {
+    private final Logger logger = LoggerFactory.getLogger(AvailableCiphersUnitTest.class);
+
+    @Test
+    public void whenGetServices_thenGetAllCipherAlgorithms() {
+        for (Provider provider : Security.getProviders()) {
+            for (Provider.Service service : provider.getServices()) {
+                logger.info(service.getAlgorithm());
+            }
+        }
+    }
+
+    @Test
+    public void whenGetServicesWithFilter_thenGetAllCompatibleCipherAlgorithms() {
+        List<String> algorithms = Arrays.stream(Security.getProviders())
+                .flatMap(provider -> provider.getServices().stream())
+                .filter(service -> "Cipher".equals(service.getType()))
+                .map(Provider.Service::getAlgorithm)
+                .collect(Collectors.toList());
+
+        algorithms.forEach(logger::info);
+    }
+}

core-java-modules/multimodulemavenproject/daomodule/pom.xml

@@ -20,6 +20,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
             </plugin>
         </plugins>
     </build>

core-java-modules/multimodulemavenproject/entitymodule/pom.xml

@@ -20,6 +20,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
             </plugin>
         </plugins>
     </build>

core-java-modules/multimodulemavenproject/mainappmodule/pom.xml

@@ -38,6 +38,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
             </plugin>
         </plugins>
     </build>

core-java-modules/multimodulemavenproject/userdaomodule/pom.xml

@@ -33,6 +33,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
             </plugin>
         </plugins>
     </build>

core-java-modules/pom.xml

@@ -18,20 +18,9 @@
 
     <modules>
         <module>core-java</module>
-        <!-- <module>core-java-10</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-11</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-12</module> --> <!-- We haven't upgraded to java 12. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-13</module> --> <!-- We haven't upgraded to java 12. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-14</module> --> <!-- We haven't upgraded to java 14.-->
         <module>core-java-8</module>
         <module>core-java-8-2</module>
 
-        <!-- <module>core-java-9</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-9-improvements</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-9-jigsaw</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-9-new-features</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-        <!-- <module>core-java-9-streams</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-
         <module>core-java-annotations</module>
 
         <module>core-java-arrays-sorting</module>
@@ -51,7 +40,6 @@
         <module>core-java-collections-maps</module>
         <module>core-java-collections-maps-2</module>
         <module>core-java-collections-maps-3</module>
-        <!-- <module>core-java-collections-set</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
 
         <module>core-java-concurrency-2</module>
         <module>core-java-concurrency-advanced</module>
@@ -65,10 +53,7 @@
 
         <!--<module>core-java-8-datetime</module>--> <!-- unit test case failure -->
         <module>core-java-8-datetime-2</module>
-        <!-- <module>core-java-date-operations-1</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
         <module>core-java-date-operations-2</module>
-        <!-- We haven't upgraded to java 9. -->
-        <!-- <module>core-java-datetime-computations</module> <module>core-java-datetime-conversion</module> <module>core-java-datetime-java8</module> <module>core-java-datetime-string</module> -->
         <module>core-java-8-datetime</module>
 
         <module>core-java-exceptions</module>
@@ -85,7 +70,6 @@
 
         <module>core-java-jar</module>
         <module>core-java-jndi</module>
-        <!-- <module>core-java-jpms</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
         <module>core-java-jvm</module>
         <module>core-java-jvm-2</module>
 
@@ -113,7 +97,6 @@
         <module>core-java-nio-2</module>
 
         <module>core-java-optional</module>
-        <!--<module>core-java-os</module> --> <!-- We haven't upgraded to java 9. -->
 
         <module>core-java-perf</module>
 
@@ -138,9 +121,6 @@
         <module>core-java-sun</module>
 
         <module>core-java-regex</module>
-        <!-- <module>core-java-time-measurements</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
-
-        <!-- <module>multimodulemavenproject</module> --> <!-- We haven't upgraded to java 9. Fixing in BAEL-10841 -->
         <module>pre-jpms</module>
     </modules>
 

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

@@ -2,6 +2,6 @@
 
 This module contains articles about core Kotlin collections.
 
-### Relevant articles:
+## Relevant articles:
-
 
+- [Aggregate Operations in Kotlin](https://www.baeldung.com/kotlin/aggregate-operations)

gradle-5/cmd-line-args/README.md

@@ -0,0 +1,3 @@
+## Relevant Articles:
+
+- [Passing Command Line Arguments in Gradle](https://www.baeldung.com/gradle-command-line-arguments)

gradle-5/source-sets/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Gradle Source Sets](https://www.baeldung.com/gradle-source-sets)

hazelcast/pom.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project
-    xmlns="http://maven.apache.org/POM/4.0.0"
+        xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>hazelcast</artifactId>
     <version>0.0.1-SNAPSHOT</version>
@@ -15,7 +15,6 @@
     </parent>
 
     <dependencies>
-        <!-- Hazelcast Jet -->
         <dependency>
             <groupId>com.hazelcast.jet</groupId>
             <artifactId>hazelcast-jet</artifactId>
@@ -34,8 +33,7 @@
     </build>
 
     <properties>
-        <!-- hazelcast jet -->
+        <hazelcast.jet.version>4.2</hazelcast.jet.version>
-        <hazelcast.jet.version>0.6</hazelcast.jet.version>
     </properties>
 
 </project>

hazelcast/src/main/java/com/baeldung/hazelcast/cluster/NativeClient.java

@@ -1,24 +1,20 @@
 package com.baeldung.hazelcast.cluster;
 
-import java.util.Map.Entry;
-
 import com.hazelcast.client.HazelcastClient;
 import com.hazelcast.client.config.ClientConfig;
-import com.hazelcast.config.GroupConfig;
 import com.hazelcast.core.HazelcastInstance;
-import com.hazelcast.core.IMap;
+
+import java.util.Map;
 
 public class NativeClient {
 
-    public static void main(String[] args) throws InterruptedException {
+    public static void main(String[] args) {
         ClientConfig config = new ClientConfig();
-        GroupConfig groupConfig = config.getGroupConfig();
+        config.setClusterName("dev");
-        groupConfig.setName("dev");
-        groupConfig.setPassword("dev-pass");
         HazelcastInstance hazelcastInstanceClient = HazelcastClient.newHazelcastClient(config);
-        IMap<Long, String> map = hazelcastInstanceClient.getMap("data");
+        Map<Long, String> map = hazelcastInstanceClient.getMap("data");
-        for (Entry<Long, String> entry : map.entrySet()) {
+        for (Map.Entry<Long, String> entry : map.entrySet()) {
-            System.out.println(String.format("Key: %d, Value: %s", entry.getKey(), entry.getValue()));
+            System.out.printf("Key: %d, Value: %s%n", entry.getKey(), entry.getValue());
         }
     }
 }

hazelcast/src/main/java/com/baeldung/hazelcast/cluster/ServerNode.java

@@ -1,19 +1,19 @@
 package com.baeldung.hazelcast.cluster;
 
-import java.util.Map;
-
 import com.hazelcast.core.Hazelcast;
 import com.hazelcast.core.HazelcastInstance;
-import com.hazelcast.core.IdGenerator;
+import com.hazelcast.flakeidgen.FlakeIdGenerator;
+
+import java.util.Map;
 
 public class ServerNode {
 
     public static void main(String[] args) {
         HazelcastInstance hazelcastInstance = Hazelcast.newHazelcastInstance();
         Map<Long, String> map = hazelcastInstance.getMap("data");
-        IdGenerator idGenerator = hazelcastInstance.getIdGenerator("newid");
+        FlakeIdGenerator idGenerator = hazelcastInstance.getFlakeIdGenerator("newid");
         for (int i = 0; i < 10; i++) {
-            map.put(idGenerator.newId(), "message" + 1);
+            map.put(idGenerator.newId(), "message" + i);
         }
     }
 }

hazelcast/src/main/java/com/baeldung/hazelcast/jet/WordCounter.java

@@ -1,33 +1,31 @@
 package com.baeldung.hazelcast.jet;
 
-import java.util.List;
-import java.util.Map;
-
-import static com.hazelcast.jet.Traversers.traverseArray;
-import static com.hazelcast.jet.aggregate.AggregateOperations.counting;
-import static com.hazelcast.jet.function.DistributedFunctions.wholeItem;
-
 import com.hazelcast.jet.Jet;
 import com.hazelcast.jet.JetInstance;
 import com.hazelcast.jet.pipeline.Pipeline;
 import com.hazelcast.jet.pipeline.Sinks;
 import com.hazelcast.jet.pipeline.Sources;
 
+import java.util.List;
+import java.util.Map;
+
+import static com.hazelcast.function.Functions.wholeItem;
+import static com.hazelcast.jet.Traversers.traverseArray;
+import static com.hazelcast.jet.aggregate.AggregateOperations.counting;
+
 public class WordCounter {
 
     private static final String LIST_NAME = "textList";
-
     private static final String MAP_NAME = "countMap";
 
     private Pipeline createPipeLine() {
         Pipeline p = Pipeline.create();
-        p.drawFrom(Sources.<String> list(LIST_NAME))
+        p.readFrom(Sources.<String>list(LIST_NAME))
-            .flatMap(word -> traverseArray(word.toLowerCase()
+            .flatMap(word -> traverseArray(word.toLowerCase().split("\\W+")))
-                .split("\\W+")))
             .filter(word -> !word.isEmpty())
             .groupingKey(wholeItem())
             .aggregate(counting())
-            .drainTo(Sinks.map(MAP_NAME));
+            .writeTo(Sinks.map(MAP_NAME));
         return p;
     }
 
@@ -38,8 +36,7 @@ public class WordCounter {
             List<String> textList = jet.getList(LIST_NAME);
             textList.addAll(sentences);
             Pipeline p = createPipeLine();
-            jet.newJob(p)
+            jet.newJob(p).join();
-                .join();
             Map<String, Long> counts = jet.getMap(MAP_NAME);
             count = counts.get(word);
         } finally {

hazelcast/src/main/resources/hazelcast.xml

@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-config-3.7.xsd"
+<hazelcast xmlns="http://www.hazelcast.com/schema/config"
-           xmlns="http://www.hazelcast.com/schema/config"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+           xsi:schemaLocation="http://www.hazelcast.com/schema/config
+                               http://www.hazelcast.com/schema/config/hazelcast-config-4.0.xsd">
     <network>
         <port auto-increment="true" port-count="20">5701</port>
         <join>
-            <multicast enabled="false">
+            <multicast enabled="false"/>
-	        </multicast>
+            <tcp-ip enabled="true">
-	      	<tcp-ip enabled="true">
+                <member>machine1</member>
-	        	<member>machine1</member>
+                <member>localhost</member>
-		        <member>localhost</member>
+            </tcp-ip>
-	      	</tcp-ip>
         </join>
     </network>
 </hazelcast>

hazelcast/src/test/java/com/baeldung/hazelcast/jet/WordCounterUnitTest.java

@@ -1,11 +1,11 @@
 package com.baeldung.hazelcast.jet;
 
-import static org.junit.Assert.assertTrue;
+import org.junit.Test;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.Test;
+import static org.junit.Assert.assertEquals;
 
 public class WordCounterUnitTest {
 
@@ -15,7 +15,7 @@ public class WordCounterUnitTest {
         sentences.add("The first second was alright, but the second second was tough.");
         WordCounter wordCounter = new WordCounter();
         long countSecond = wordCounter.countWord(sentences, "second");
-        assertTrue(countSecond == 3);
+        assertEquals(3, countSecond);
     }
 
 }

libraries-security/README.md

@@ -11,3 +11,4 @@ This module contains articles about security libraries.
 - [Intro to Jasypt](https://www.baeldung.com/jasypt)
 - [Digital Signatures in Java](https://www.baeldung.com/java-digital-signature)
 - [How to Read PEM File to Get Public and Private Keys](https://www.baeldung.com/java-read-pem-file-keys)
+- [SSH Connection With Java](https://www.baeldung.com/java-ssh-connection)

libraries-testing/README.md

@@ -12,3 +12,4 @@ This module contains articles about test libraries.
 - [Introduction to Hoverfly in Java](https://www.baeldung.com/hoverfly)
 - [Testing with Hamcrest](https://www.baeldung.com/java-junit-hamcrest-guide)
 - [Introduction To DBUnit](https://www.baeldung.com/java-dbunit)
+- [Introduction to ArchUnit](https://www.baeldung.com/java-archunit-intro)

patterns/design-patterns-architectural/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 - [Service Locator Pattern](https://www.baeldung.com/java-service-locator-pattern)
 - [The DAO Pattern in Java](https://www.baeldung.com/java-dao-pattern)
+- [DAO vs Repository Patterns](https://www.baeldung.com/java-dao-vs-repository)

persistence-modules/flyway/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 - [Database Migrations with Flyway](http://www.baeldung.com/database-migrations-with-flyway)
 - [A Guide to Flyway Callbacks](http://www.baeldung.com/flyway-callbacks)
+- [Rolling Back Migrations with Flyway](https://www.baeldung.com/flyway-roll-back)

pom.xml

@@ -383,6 +383,7 @@
                 <module>core-groovy</module>
                 <module>core-groovy-2</module>
                 <module>core-groovy-collections</module>
+                <module>core-groovy-strings</module>
 
                 <module>core-java-modules</module>
                 <module>core-kotlin-modules</module>
@@ -894,6 +895,7 @@
                 <module>core-groovy</module>
                 <module>core-groovy-2</module>
                 <module>core-groovy-collections</module>
+                <module>core-groovy-strings</module>
 
                 <module>core-java-modules</module>
                 <module>core-kotlin-modules</module>
@@ -1332,6 +1334,104 @@
 
         </profile>
 
+        <profile>
+            <id>default-jdk9-and-above</id>
+
+            <build>
+                <plugins>
+
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <version>${maven-surefire-plugin.version}</version>
+                        <configuration>
+                            <forkCount>3</forkCount>
+                            <reuseForks>true</reuseForks>
+                            <includes>
+                                <include>SpringContextTest</include>
+                                <include>**/*UnitTest</include>
+                            </includes>
+                            <excludes>
+                                <exclude>**/*IntegrationTest.java</exclude>
+                                <exclude>**/*IntTest.java</exclude>
+                                <exclude>**/*LongRunningUnitTest.java</exclude>
+                                <exclude>**/*ManualTest.java</exclude>
+                                <exclude>**/JdbcTest.java</exclude>
+                                <exclude>**/*LiveTest.java</exclude>
+                            </excludes>
+                        </configuration>
+                    </plugin>
+
+                </plugins>
+            </build>
+
+            <modules>
+                 <module>core-java-modules/core-java-9</module>
+                 <module>core-java-modules/core-java-9-improvements</module>
+                 <!-- <module>core-java-modules/core-java-9-jigsaw</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-9-new-features</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <module>core-java-modules/core-java-9-streams</module>
+                 <module>core-java-modules/core-java-10</module>
+                 <!-- <module>core-java-modules/core-java-11</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-12</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-13</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-14</module> --> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <module>core-java-modules/core-java-collections-set</module>
+                 <!-- <module>core-java-modules/core-java-date-operations-1</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-datetime-conversion</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-datetime-string</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <module>core-java-modules/core-java-jpms</module>
+                 <!-- <module>core-java-modules/core-java-os</module>-->  <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <!-- <module>core-java-modules/core-java-time-measurements</module>-->   <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                 <module>core-java-modules/multimodulemavenproject</module>
+                 <!-- <module>maven-java-11</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+            </modules>
+        </profile>
+
+        <profile>
+            <id>integration-jdk9-and-above</id>
+
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <configuration>
+                            <excludes>
+                                <exclude>**/*ManualTest.java</exclude>
+                                <exclude>**/*LiveTest.java</exclude>
+                            </excludes>
+                            <includes>
+                                <include>**/*IntegrationTest.java</include>
+                                <include>**/*IntTest.java</include>
+                            </includes>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+
+            <modules>
+                <module>core-java-modules/core-java-9</module>
+                <module>core-java-modules/core-java-9-improvements</module>
+                <!-- <module>core-java-modules/core-java-9-jigsaw</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-9-new-features</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <module>core-java-modules/core-java-9-streams</module>
+                <module>core-java-modules/core-java-10</module>
+                <!-- <module>core-java-modules/core-java-11</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-12</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-13</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-14</module> --> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <module>core-java-modules/core-java-collections-set</module>
+                <!-- <module>core-java-modules/core-java-date-operations-1</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-datetime-conversion</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-datetime-string</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <module>core-java-modules/core-java-jpms</module>
+                <!-- <module>core-java-modules/core-java-os</module>-->  <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <!-- <module>core-java-modules/core-java-time-measurements</module>-->   <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+                <module>core-java-modules/multimodulemavenproject</module>
+                <!-- <module>maven-java-11</module>--> <!-- to be fixed in http://team.baeldung.com/browse/JAVA-2824 -->
+            </modules>
+        </profile>
     </profiles>
 
     <reporting>

quarkus/README.md

@@ -1,3 +1,4 @@
 ## Relevant Articles:
 
 - [Guide to QuarkusIO](https://www.baeldung.com/quarkus-io)
+- [Testing Quarkus Applications](https://www.baeldung.com/java-quarkus-testing)

quarkus/pom.xml

@@ -99,6 +99,8 @@
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>${surefire-plugin.version}</version>
                 <configuration>
+                    <forkCount>1</forkCount>
+                    <reuseForks>true</reuseForks>
                     <systemProperties>
                         <java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
                     </systemProperties>

spring-5-security-oauth/README.md

@@ -7,3 +7,4 @@ This module contains articles about Spring 5 OAuth Security
 - [Spring Security 5 – OAuth2 Login](https://www.baeldung.com/spring-security-5-oauth2-login)
 - [Extracting Principal and Authorities using Spring Security OAuth](https://www.baeldung.com/spring-security-oauth-principal-authorities-extractor)
 - [Customizing Authorization and Token Requests with Spring Security 5.1 Client](https://www.baeldung.com/spring-security-custom-oauth-requests)
+- [Social Login with Spring Security in a Jersey Application](https://www.baeldung.com/spring-security-social-login-jersey)

spring-5-security-oauth/pom.xml

@@ -32,6 +32,10 @@
             <groupId>org.thymeleaf.extras</groupId>
             <artifactId>thymeleaf-extras-springsecurity5</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jersey</artifactId>
+        </dependency>
 
         <!-- oauth2 -->
         <dependency>
@@ -63,7 +67,7 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
-	
+
     <properties>
         <start-class>com.baeldung.oauth2.SpringOAuthApplication</start-class>
     </properties>

spring-5-security-oauth/src/main/java/com/baeldung/jersey/JerseyApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.jersey;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@PropertySource("classpath:jersey-application.properties")
+public class JerseyApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(JerseyApplication.class, args);
+    }
+}

spring-5-security-oauth/src/main/java/com/baeldung/jersey/JerseyResource.java

@@ -0,0 +1,30 @@
+package com.baeldung.jersey;
+
+import org.springframework.security.oauth2.client.authentication.OAuth2AuthenticationToken;
+import org.springframework.security.oauth2.core.OAuth2AuthenticatedPrincipal;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.SecurityContext;
+
+@Path("/")
+public class JerseyResource {
+    @GET
+    @Path("login")
+    @Produces(MediaType.TEXT_HTML)
+    public String login() {
+        return "Log in with <a href=\"/oauth2/authorization/github\">GitHub</a>";
+    }
+
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    public String home(@Context SecurityContext securityContext) {
+        OAuth2AuthenticationToken authenticationToken = (OAuth2AuthenticationToken) securityContext.getUserPrincipal();
+        OAuth2AuthenticatedPrincipal authenticatedPrincipal = authenticationToken.getPrincipal();
+        String userName = authenticatedPrincipal.getAttribute("login");
+        return "Hello " + userName;
+    }
+}

spring-5-security-oauth/src/main/java/com/baeldung/jersey/RestConfig.java

@@ -0,0 +1,11 @@
+package com.baeldung.jersey;
+
+import org.glassfish.jersey.server.ResourceConfig;
+import org.springframework.stereotype.Component;
+
+@Component
+public class RestConfig extends ResourceConfig {
+    public RestConfig() {
+        register(JerseyResource.class);
+    }
+}

spring-5-security-oauth/src/main/java/com/baeldung/jersey/SecurityConfig.java

@@ -0,0 +1,21 @@
+package com.baeldung.jersey;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+@Configuration
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http
+          .authorizeRequests()
+          .antMatchers("/login")
+          .permitAll()
+          .anyRequest()
+          .authenticated()
+          .and()
+          .oauth2Login()
+          .loginPage("/login");
+    }
+}

spring-5-security-oauth/src/main/resources/jersey-application.properties

@@ -0,0 +1,3 @@
+server.port=8083
+spring.security.oauth2.client.registration.github.client-id=<your-client-id>
+spring.security.oauth2.client.registration.github.client-secret=<your-client-secret>

spring-5-security-oauth/src/test/java/com/baeldung/jersey/JerseyResourceUnitTest.java

@@ -0,0 +1,72 @@
+package com.baeldung.jersey;
+
+import org.junit.Before;
+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.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.net.URI;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+import static org.springframework.http.MediaType.TEXT_HTML;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT)
+@TestPropertySource(properties = "spring.security.oauth2.client.registration.github.client-id:test-id")
+public class JerseyResourceUnitTest {
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @LocalServerPort
+    private int port;
+
+    private String basePath;
+
+    @Before
+    public void setup() {
+        basePath = "http://localhost:" + port + "/";
+    }
+
+    @Test
+    public void whenUserIsUnauthenticated_thenTheyAreRedirectedToLoginPage() {
+        ResponseEntity<Object> response = restTemplate.getForEntity(basePath, Object.class);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.FOUND);
+        assertThat(response.getBody()).isNull();
+
+        URI redirectLocation = response.getHeaders().getLocation();
+        assertThat(redirectLocation).isNotNull();
+        assertThat(redirectLocation.toString()).isEqualTo(basePath + "login");
+    }
+
+    @Test
+    public void whenUserAttemptsToLogin_thenAuthorizationPathIsReturned() {
+        ResponseEntity<String> response = restTemplate.getForEntity(basePath + "login", String.class);
+        assertThat(response.getHeaders().getContentType()).isEqualTo(TEXT_HTML);
+        assertThat(response.getBody()).isEqualTo("Log in with <a href=\"/oauth2/authorization/github\">GitHub</a>");
+    }
+
+    @Test
+    public void whenUserAccessesAuthorizationEndpoint_thenTheyAresRedirectedToProvider() {
+        ResponseEntity<String> response = restTemplate.getForEntity(basePath + "oauth2/authorization/github", String.class);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.FOUND);
+        assertThat(response.getBody()).isNull();
+
+        URI redirectLocation = response.getHeaders().getLocation();
+        assertThat(redirectLocation).isNotNull();
+        assertThat(redirectLocation.getHost()).isEqualTo("github.com");
+        assertThat(redirectLocation.getPath()).isEqualTo("/login/oauth/authorize");
+
+        String redirectionQuery = redirectLocation.getQuery();
+        assertThat(redirectionQuery.contains("response_type=code"));
+        assertThat(redirectionQuery.contains("client_id=test-id"));
+        assertThat(redirectionQuery.contains("scope=read:user"));
+    }
+}

spring-5-security/src/main/java/com/baeldung/inmemory/InMemoryNoOpAuthWebSecurityConfigurer.java

@@ -0,0 +1,29 @@
+package com.baeldung.inmemory;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+
+//@Configuration
+public class InMemoryNoOpAuthWebSecurityConfigurer extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
+        auth.inMemoryAuthentication()
+            .withUser("spring")
+            .password("{noop}secret")
+            .roles("USER");
+    }
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.authorizeRequests()
+            .antMatchers("/private/**")
+            .authenticated()
+            .antMatchers("/public/**")
+            .permitAll()
+            .and()
+            .httpBasic();
+    }
+}

spring-5-webflux/README.md

@@ -8,3 +8,4 @@ This module contains articles about Spring 5 WebFlux
 - [How to Return 404 with Spring WebFlux](https://www.baeldung.com/spring-webflux-404)
 - [Spring WebClient Requests with Parameters](https://www.baeldung.com/webflux-webclient-parameters)
 - [RSocket Using Spring Boot](https://www.baeldung.com/spring-boot-rsocket)
+- [Spring MVC Async vs Spring WebFlux](https://www.baeldung.com/spring-mvc-async-vs-webflux)

spring-boot-modules/spring-boot-actuator/README.md

@@ -9,3 +9,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 
 - [Liveness and Readiness Probes in Spring Boot](https://www.baeldung.com/spring-liveness-readiness-probes)
 - [Custom Information in Spring Boot Info Endpoint](https://www.baeldung.com/spring-boot-info-actuator-custom)
+- [Health Indicators in Spring Boot](https://www.baeldung.com/spring-boot-health-indicators)

spring-boot-modules/spring-boot-autoconfiguration/README.md

@@ -10,4 +10,5 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Create a Custom Auto-Configuration with Spring Boot](https://www.baeldung.com/spring-boot-custom-auto-configuration)
 - [Guide to ApplicationContextRunner in Spring Boot](https://www.baeldung.com/spring-boot-context-runner)
 - [A Guide to Spring Boot Configuration Metadata](https://www.baeldung.com/spring-boot-configuration-metadata)
-- [Display Auto-Configuration Report in Spring Boot](https://www.baeldung.com/spring-boot-auto-configuration-report)
+- [Display Auto-Configuration Report in Spring Boot](https://www.baeldung.com/spring-boot-auto-configuration-report)
+- [The Spring @ConditionalOnProperty Annotation](https://www.baeldung.com/spring-conditionalonproperty)

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

@@ -14,15 +14,7 @@
     <packaging>jar</packaging>
 
     <name>spring-boot-exceptions</name>
-	<description>Demo project for working with Spring Boot exceptions</description>
+    <description>Demo project for working with Spring Boot exceptions</description>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter</artifactId>
-            <version>${spring-boot.version}</version>
-        </dependency>
-    </dependencies>
 
     <build>
         <finalName>spring-boot-exceptions</finalName>
@@ -32,68 +24,6 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
-
-        <plugins>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-war-plugin</artifactId>
-            </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-resources-plugin</artifactId>
-                <configuration>
-                    <delimiters>
-                        <delimiter>@</delimiter>
-                    </delimiters>
-                    <useDefaultDelimiters>false</useDefaultDelimiters>
-                </configuration>
-            </plugin>
-        </plugins>
-
     </build>
 
-    <profiles>
-        <profile>
-            <id>autoconfiguration</id>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-surefire-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <phase>integration-test</phase>
-                                <goals>
-                                    <goal>test</goal>
-                                </goals>
-                                <configuration>
-                                    <excludes>
-                                        <exclude>**/*LiveTest.java</exclude>
-                                        <exclude>**/*IntegrationTest.java</exclude>
-                                        <exclude>**/*IntTest.java</exclude>
-                                    </excludes>
-                                    <includes>
-                                        <include>**/AutoconfigurationTest.java</include>
-                                    </includes>
-                                </configuration>
-                            </execution>
-                        </executions>
-                        <configuration>
-                            <systemPropertyVariables>
-                                <test.mime>json</test.mime>
-                            </systemPropertyVariables>
-                        </configuration>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
-    </profiles>
-
-    <properties>
-        <!-- The main class to start by executing java -jar -->
-        <start-class>com.baeldung.intro.App</start-class>
-        <spring-boot.version>2.2.3.RELEASE</spring-boot.version>
-    </properties>
 </project>

spring-boot-modules/spring-boot-keycloak/README.md

@@ -4,3 +4,4 @@ This module contains articles about Keycloak in Spring Boot projects.
 
 ## Relevant articles:
 - [A Quick Guide to Using Keycloak with Spring Boot](https://www.baeldung.com/spring-boot-keycloak)
+- [Custom User Attributes with Keycloak](https://www.baeldung.com/keycloak-custom-user-attributes)

spring-boot-modules/spring-boot-mvc-3/README.md

@@ -6,4 +6,5 @@ This module contains articles about Spring Web MVC in Spring Boot projects.
 
 - [Circular View Path Error](https://www.baeldung.com/spring-circular-view-path-error)
 - [Download an Image or a File with Spring MVC](https://www.baeldung.com/spring-controller-return-image-file)
+- [Spring MVC Async vs Spring WebFlux](https://www.baeldung.com/spring-mvc-async-vs-webflux)
 - More articles: [[prev -->]](/spring-boot-modules/spring-boot-mvc-2)

spring-boot-modules/spring-boot-mvc-3/pom.xml

@@ -22,6 +22,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
@@ -37,4 +41,4 @@
         <commons-io.version>2.7</commons-io.version>
     </properties>
 
-</project>
+</project>

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/ServletInitializer.java

@@ -0,0 +1,12 @@
+package com.baeldung.springvalidation;
+
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+
+public class ServletInitializer extends SpringBootServletInitializer {
+
+    @Override
+    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+        return application.sources(SpringValidationApplication.class);
+    }
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/SpringValidationApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.springvalidation;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringValidationApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringValidationApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/controller/UserAccountController.java

@@ -0,0 +1,44 @@
+package com.baeldung.springvalidation.controller;
+
+import javax.validation.Valid;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.ui.ModelMap;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+
+import com.baeldung.springvalidation.domain.UserAccount;
+import com.baeldung.springvalidation.interfaces.BasicInfo;
+
+@Controller
+public class UserAccountController {
+
+    @GetMapping("/getUserForm")
+    public String showUserForm(Model theModel) {
+        UserAccount theUser = new UserAccount();
+        theModel.addAttribute("useraccount", theUser);
+        return "userHome";
+    }
+
+    @RequestMapping(value = "/saveBasicInfo", method = RequestMethod.POST)
+    public String saveBasicInfo(@Valid @ModelAttribute("useraccount") UserAccount useraccount, BindingResult result, ModelMap model) {
+        if (result.hasErrors()) {
+            return "error";
+        }
+        return "success";
+    }
+
+    @RequestMapping(value = "/saveBasicInfoStep1", method = RequestMethod.POST)
+    public String saveBasicInfoStep1(@Validated(BasicInfo.class) @ModelAttribute("useraccount") UserAccount useraccount, BindingResult result, ModelMap model) {
+        if (result.hasErrors()) {
+            return "error";
+        }
+        return "success";
+    }
+
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/domain/UserAccount.java

@@ -0,0 +1,80 @@
+package com.baeldung.springvalidation.domain;
+
+import javax.validation.Valid;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+
+import com.baeldung.springvalidation.interfaces.AdvanceInfo;
+import com.baeldung.springvalidation.interfaces.BasicInfo;
+
+public class UserAccount {
+
+    @NotNull(groups = BasicInfo.class)
+    @Size(min = 4, max = 15, groups = BasicInfo.class)
+    private String password;
+
+    @NotBlank(groups = BasicInfo.class)
+    private String name;
+
+    @Min(value = 18, message = "Age should not be less than 18", groups = AdvanceInfo.class)
+    private int age;
+
+    @NotBlank(groups = AdvanceInfo.class)
+    private String phone;
+
+    @Valid
+    @NotNull(groups = AdvanceInfo.class)
+    private UserAddress useraddress;
+
+    public UserAddress getUseraddress() {
+        return useraddress;
+    }
+
+    public void setUseraddress(UserAddress useraddress) {
+        this.useraddress = useraddress;
+    }
+
+    public UserAccount() {
+
+    }
+
+    public UserAccount(String email, String password, String name, int age) {
+        this.password = password;
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/domain/UserAddress.java

@@ -0,0 +1,17 @@
+package com.baeldung.springvalidation.domain;
+
+import javax.validation.constraints.NotBlank;
+public class UserAddress {
+    
+    @NotBlank
+    private String countryCode;
+    
+    public String getCountryCode() {
+        return countryCode;
+    }
+
+    public void setCountryCode(String countryCode) {
+        this.countryCode = countryCode;
+    }
+   
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/interfaces/AdvanceInfo.java

@@ -0,0 +1,6 @@
+package com.baeldung.springvalidation.interfaces;
+
+public interface AdvanceInfo {
+    // validation group marker interface
+
+}

spring-boot-modules/spring-boot-mvc-3/src/main/java/com/baeldung/springvalidation/interfaces/BasicInfo.java

@@ -0,0 +1,6 @@
+package com.baeldung.springvalidation.interfaces;
+
+public interface BasicInfo {
+    // validation group marker interface
+
+}

spring-boot-modules/spring-boot-mvc-3/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+spring.mvc.view.prefix=/WEB-INF/views/
+spring.mvc.view.suffix=.html

spring-boot-modules/spring-boot-mvc-3/src/main/resources/templates/error.html

@@ -0,0 +1,10 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>SpringValidation</title>
+</head>
+
+<body>
+	<h3>Error!!!</h3>
+</body>
+</html>

spring-boot-modules/spring-boot-mvc-3/src/main/resources/templates/success.html

@@ -0,0 +1,10 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>SpringValidation</title>
+</head>
+
+<body>
+	<h3>SUCCESS!!!</h3>
+</body>
+</html>

spring-boot-modules/spring-boot-mvc-3/src/test/java/com/baeldung/springvalidation/UserAccountUnitTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.springvalidation;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.model;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.view;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureMockMvc
+public class UserAccountUnitTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    public void givenSaveBasicInfo_whenCorrectInput_thenSuccess() throws Exception {
+        this.mockMvc.perform(MockMvcRequestBuilders.post("/saveBasicInfo")
+            .accept(MediaType.TEXT_HTML)
+            .param("name", "test123")
+            .param("password", "pass"))
+            .andExpect(view().name("success"))
+            .andExpect(status().isOk())
+            .andDo(print());
+    }
+
+    @Test
+    public void givenSaveBasicInfoStep1_whenCorrectInput_thenSuccess() throws Exception {
+        this.mockMvc.perform(MockMvcRequestBuilders.post("/saveBasicInfoStep1")
+            .accept(MediaType.TEXT_HTML)
+            .param("name", "test123")
+            .param("password", "pass"))
+            .andExpect(view().name("success"))
+            .andExpect(status().isOk())
+            .andDo(print());
+    }
+
+    @Test
+    public void givenSaveBasicInfoStep1_whenIncorrectInput_thenError() throws Exception {
+        this.mockMvc.perform(MockMvcRequestBuilders.post("/saveBasicInfoStep1")
+            .accept(MediaType.TEXT_HTML))
+            // .param("name", "test123")
+            // .param("password", "pass"))
+            .andExpect(model().errorCount(2))
+            // .andExpect(view().name("error"))
+            .andExpect(status().isOk())
+            .andDo(print());
+    }
+
+}

spring-boot-modules/spring-boot-properties-3/README.md

@@ -6,4 +6,4 @@
 ### Relevant Articles:
 
 - [How to Define a Map in YAML for a POJO?](https://www.baeldung.com/yaml-map-pojo)
-
+- [Using application.yml vs application.properties in Spring Boot](https://www.baeldung.com/spring-boot-yaml-vs-properties)

spring-boot-modules/spring-boot-swagger/README.md

@@ -0,0 +1,3 @@
+## Relevant Articles:
+
+- [Hiding Endpoints From Swagger Documentation in Spring Boot](https://www.baeldung.com/spring-swagger-hiding-endpoints)

spring-cloud/spring-cloud-consul/README.md

@@ -1,3 +1,4 @@
 
 ### Relevant Articles:
 - [A Quick Guide to Spring Cloud Consul](http://www.baeldung.com/spring-cloud-consul)
+- [Leadership Election With Consul](https://www.baeldung.com/consul-leadership-election)

spring-mvc-basics-4/src/main/java/com/baeldung/jsonparams/config/JsonParamsConfig.java

@@ -0,0 +1,36 @@
+package com.baeldung.jsonparams.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.ViewResolver;
+import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@Configuration
+@EnableWebMvc
+@ComponentScan(basePackages = { "com.baeldung.jsonparams" })
+public class JsonParamsConfig implements WebMvcConfigurer {
+    @Override
+    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
+        configurer.enable();
+    }
+
+    @Bean
+    public ViewResolver viewResolver() {
+        InternalResourceViewResolver bean = new InternalResourceViewResolver();
+        bean.setPrefix("/WEB-INF/");
+        bean.setSuffix(".jsp");
+        return bean;
+    }
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        return new ObjectMapper();
+    }
+
+}

spring-mvc-basics-4/src/main/java/com/baeldung/jsonparams/config/JsonParamsInit.java

@@ -0,0 +1,29 @@
+package com.baeldung.jsonparams.config;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRegistration;
+
+import org.springframework.web.context.ContextLoaderListener;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.servlet.DispatcherServlet;
+
+public class JsonParamsInit // implements WebApplicationInitializer 
+{
+
+    //uncomment to run the product controller example
+    //@Override
+    public void onStartup(ServletContext sc) throws ServletException {
+        AnnotationConfigWebApplicationContext root = new AnnotationConfigWebApplicationContext();
+        root.register(JsonParamsConfig.class);
+        root.setServletContext(sc);
+        sc.addListener(new ContextLoaderListener(root));
+
+        DispatcherServlet dv = new DispatcherServlet(root);
+
+        ServletRegistration.Dynamic appServlet = sc.addServlet("jsonparams-mvc", dv);
+        appServlet.setLoadOnStartup(1);
+        appServlet.addMapping("/");
+    }
+
+}

spring-mvc-basics-4/src/main/java/com/baeldung/jsonparams/controller/ProductController.java

@@ -0,0 +1,57 @@
+package com.baeldung.jsonparams.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.WebDataBinder;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.InitBinder;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import com.baeldung.jsonparams.model.Product;
+import com.baeldung.jsonparams.propertyeditor.ProductEditor;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@Controller
+@RequestMapping("/products")
+public class ProductController {
+
+    private ObjectMapper objectMapper;
+
+    @Autowired
+    public void setObjectMapper(ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper;
+    }
+
+    @InitBinder
+    public void initBinder(WebDataBinder binder) {
+        binder.registerCustomEditor(Product.class, new ProductEditor(objectMapper));
+    }
+
+    @PostMapping("/create")
+    @ResponseBody
+    public Product createProduct(@RequestBody Product product) {
+        // custom logic
+        return product;
+    }
+
+    @GetMapping("/get")
+    @ResponseBody
+    public Product getProduct(@RequestParam String product) throws JsonMappingException, JsonProcessingException {
+        final Product prod = objectMapper.readValue(product, Product.class);
+        return prod;
+    }
+
+    @GetMapping("/get2")
+    @ResponseBody
+    public Product get2Product(@RequestParam Product product) {
+        // custom logic
+        return product;
+    }
+
+}

spring-mvc-basics-4/src/main/java/com/baeldung/jsonparams/model/Product.java

@@ -0,0 +1,37 @@
+package com.baeldung.jsonparams.model;
+
+public class Product {
+
+    private int id;
+    private String name;
+    private double price;
+
+    public Product() {
+
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String nom) {
+        this.name = nom;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+}

spring-mvc-basics-4/src/main/java/com/baeldung/jsonparams/propertyeditor/ProductEditor.java

@@ -0,0 +1,34 @@
+package com.baeldung.jsonparams.propertyeditor;
+
+import java.beans.PropertyEditorSupport;
+
+import org.springframework.util.StringUtils;
+
+import com.baeldung.jsonparams.model.Product;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class ProductEditor extends PropertyEditorSupport {
+
+    private ObjectMapper objectMapper;
+
+    public ProductEditor(ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper;
+    }
+
+    @Override
+    public void setAsText(String text) throws IllegalArgumentException {
+        if (StringUtils.isEmpty(text)) {
+            setValue(null);
+        } else {
+            Product prod = new Product();
+            try {
+                prod = objectMapper.readValue(text, Product.class);
+            } catch (JsonProcessingException e) {
+                throw new IllegalArgumentException(e);
+            }
+            setValue(prod);
+        }
+    }
+
+}

spring-mvc-basics-4/src/test/java/com/baeldung/jsonparams/JsonParamsIntegrationTest.java

@@ -0,0 +1,71 @@
+package com.baeldung.jsonparams;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.AnnotationConfigWebContextLoader;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+import com.baeldung.jsonparams.config.JsonParamsConfig;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@WebAppConfiguration
+@ContextConfiguration(classes = { JsonParamsConfig.class }, loader = AnnotationConfigWebContextLoader.class)
+public class JsonParamsIntegrationTest {
+
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setUp() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac)
+            .build();
+    }
+
+    @Test
+    public void whenJsonIsPassedWithPost_thenResponseOK() throws Exception {
+
+        this.mockMvc.perform(post("/products/create").accept(MediaType.APPLICATION_JSON)
+            .contentType(MediaType.APPLICATION_JSON)
+            .content("{\"id\": 1,\"name\": \"Asus Zenbook\",\"price\": 800}"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id").value("1"))
+            .andExpect(jsonPath("$.name").value("Asus Zenbook"));
+
+    }
+
+    @Test
+    public void whenJsonIsPassedWithGet_thenResponseOK() throws Exception {
+
+        this.mockMvc.perform(get("/products/get").contentType(MediaType.APPLICATION_JSON)
+            .queryParam("product", "{\"id\": 2,\"name\": \"HP EliteBook\",\"price\": 700}"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id").value("2"))
+            .andExpect(jsonPath("$.name").value("HP EliteBook"));
+
+    }
+
+    @Test
+    public void whenJsonIsPassedWithGet2_thenResponseOK() throws Exception {
+
+        this.mockMvc.perform(get("/products/get2").contentType(MediaType.APPLICATION_JSON)
+            .queryParam("product", "{\"id\": 3,\"name\": \"Dell G5 15\",\"price\": 1200}"))
+            .andExpect(status().isOk())
+            .andExpect(jsonPath("$.id").value("3"))
+            .andExpect(jsonPath("$.name").value("Dell G5 15"));
+
+    }
+
+}

spring-rest-http-2/README.md

@@ -7,4 +7,4 @@ The "REST With Spring 2" Classes: http://bit.ly/restwithspring
 
 ### Relevant Articles:
 
-
+- [How to Turn Off Swagger-ui in Production](https://www.baeldung.com/swagger-ui-turn-off-in-production)