Merge remote-tracking branch 'upstream/master'

algorithms/src/main/java/com/baeldung/algorithms/editdistance/EditDistanceBase.java

@@ -1,22 +1,15 @@
 package com.baeldung.algorithms.editdistance;
 
+import java.util.Arrays;
+
 public class EditDistanceBase {
 
-    public static int costOfSubstitution(char a, char b) {
-        if (a == b) {
-            return 0;
-        }
-        return 1;
+    static int costOfSubstitution(char a, char b) {
+        return a == b ? 0 : 1;
     }
 
-    public static int min(int... numbers) {
-        int min = Integer.MAX_VALUE;
-
-        for (int x : numbers) {
-            if (x < min)
-                min = x;
-        }
-
-        return min;
+    static int min(int... numbers) {
+        return Arrays.stream(numbers)
+          .min().orElse(Integer.MAX_VALUE);
     }
 }

algorithms/src/main/java/com/baeldung/algorithms/editdistance/EditDistanceDynamicProgramming.java

@@ -2,7 +2,7 @@ package com.baeldung.algorithms.editdistance;
 
 public class EditDistanceDynamicProgramming extends EditDistanceBase {
 
-    public static int calculate(String x, String y) {
+    static int calculate(String x, String y) {
         int[][] dp = new int[x.length() + 1][y.length() + 1];
 
         for (int i = 0; i <= x.length(); i++) {
@@ -14,12 +14,13 @@ public class EditDistanceDynamicProgramming extends EditDistanceBase {
                     dp[i][j] = i;
 
                 else {
-                    dp[i][j] = min(dp[i - 1][j - 1] + costOfSubstitution(x.charAt(i - 1), y.charAt(j - 1)), dp[i - 1][j] + 1, dp[i][j - 1] + 1);
+                    dp[i][j] = min(dp[i - 1][j - 1]
+                        + costOfSubstitution(x.charAt(i - 1), y.charAt(j - 1)),
+                      dp[i - 1][j] + 1, dp[i][j - 1] + 1);
                 }
             }
         }
 
         return dp[x.length()][y.length()];
     }
-
 }

algorithms/src/main/java/com/baeldung/algorithms/editdistance/EditDistanceRecursive.java

@@ -2,13 +2,15 @@ package com.baeldung.algorithms.editdistance;
 
 public class EditDistanceRecursive extends EditDistanceBase {
 
-    public static int calculate(String x, String y) {
+    static int calculate(String x, String y) {
 
-        if (x.isEmpty())
+        if (x.isEmpty()) {
             return y.length();
+        }
 
-        if (y.isEmpty())
+        if (y.isEmpty()) {
             return x.length();
+        }
 
         int substitution = calculate(x.substring(1), y.substring(1)) + costOfSubstitution(x.charAt(0), y.charAt(0));
         int insertion = calculate(x, y.substring(1)) + 1;
@@ -16,5 +18,4 @@ public class EditDistanceRecursive extends EditDistanceBase {
 
         return min(substitution, insertion, deletion);
     }
-
 }

algorithms/src/test/java/com/baeldung/algorithms/editdistance/EditDistanceTest.java

@@ -1,16 +1,17 @@
 package com.baeldung.algorithms.editdistance;
 
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
+import static org.junit.Assert.assertEquals;
+
 @RunWith(Parameterized.class)
 public class EditDistanceTest extends EditDistanceDataProvider {
 
-    String x;
-    String y;
-    int result;
+    private String x;
+    private String y;
+    private int result;
 
     public EditDistanceTest(String a, String b, int res) {
         super();
@@ -21,11 +22,11 @@ public class EditDistanceTest extends EditDistanceDataProvider {
 
     @Test
     public void testEditDistance_RecursiveImplementation() {
-        Assert.assertEquals(result, EditDistanceRecursive.calculate(x, y));
+        assertEquals(result, EditDistanceRecursive.calculate(x, y));
     }
 
     @Test
     public void testEditDistance_givenDynamicProgrammingImplementation() {
-        Assert.assertEquals(result, EditDistanceDynamicProgramming.calculate(x, y));
+        assertEquals(result, EditDistanceDynamicProgramming.calculate(x, y));
     }
 }

apache-spark/src/main/java/com/baeldung/WordCount.java

@@ -17,37 +17,24 @@ import scala.Tuple2;
 public class WordCount {
 
     private static final Pattern SPACE = Pattern.compile(" ");
-    
+
     public static void main(String[] args) throws Exception {
-    if (args.length < 1) {
-        System.err.println("Usage: JavaWordCount <file>");
-        System.exit(1);
+        if (args.length < 1) {
+            System.err.println("Usage: JavaWordCount <file>");
+            System.exit(1);
+        }
+        SparkConf sparkConf = new SparkConf().setAppName("JavaWordCount")
+            .setMaster("local");
+        JavaSparkContext ctx = new JavaSparkContext(sparkConf);
+        JavaRDD<String> lines = ctx.textFile(args[0], 1);
+
+        JavaRDD<String> words = lines.flatMap(s -> Arrays.asList(SPACE.split(s)).iterator());
+        JavaPairRDD<String, Integer> wordAsTuple = words.mapToPair(word -> new Tuple2<>(word, 1));
+        JavaPairRDD<String, Integer> wordWithCount = wordAsTuple.reduceByKey((Integer i1, Integer i2)->i1 + i2);
+        List<Tuple2<String, Integer>> output = wordWithCount.collect();
+        for (Tuple2<?, ?> tuple : output) {
+             System.out.println(tuple._1() + ": " + tuple._2());
+        }
+        ctx.stop();
     }
-    SparkConf sparkConf = new SparkConf().setAppName("JavaWordCount").setMaster("local");
-    JavaSparkContext ctx = new JavaSparkContext(sparkConf);
-    JavaRDD<String> lines = ctx.textFile(args[0], 1);
-
-    JavaRDD<String> words = lines.flatMap(s -> Arrays.asList(SPACE.split(s)).iterator());
-    JavaPairRDD<String, Integer> ones = words.mapToPair(
-      new PairFunction<String, String, Integer>() {
-          @Override
-          public Tuple2<String, Integer> call(String s) {
-              return new Tuple2<>(s, 1);
-          }
-      });
-
-    JavaPairRDD<String, Integer> counts = ones.reduceByKey(
-      new Function2<Integer, Integer, Integer>() {
-          @Override
-          public Integer call(Integer i1, Integer i2) {
-              return i1 + i2;
-          }
-      });
-
-    List<Tuple2<String, Integer>> output = counts.collect();
-    for (Tuple2<?, ?> tuple : output) {
-        System.out.println(tuple._1() + ": " + tuple._2());
-    }
-    ctx.stop();
-}
 }

cas-secured-app/README.md

@@ -1 +0,0 @@
-## Relevant articles:

cas/cas-secured-app/.gitignore

@@ -0,0 +1,27 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+/.mvn/
+/mvnw
+/mvnw.cmd

core-java-concurrency/src/main/java/com/baeldung/concurrent/daemon/NewThread.java

@@ -0,0 +1,20 @@
+package com.baeldung.concurrent.daemon;
+
+public class NewThread extends Thread {
+
+    public void run() {
+    	
+    	long startTime = System.currentTimeMillis();
+        while (true) {
+            for (int i = 0; i < 10; i++) {
+                System.out.println("New Thread is running..." + i);
+            }
+            
+            // prevent the Thread to run forever. It will finish it's execution after 2 seconds
+            if (System.currentTimeMillis() - startTime > 2000) {
+            	Thread.currentThread().interrupt();
+            	break;
+            }
+        }
+    }
+}

core-java-concurrency/src/test/java/com/baeldung/concurrent/daemon/DaemonThreadTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.concurrent.daemon;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+public class DaemonThreadTest {
+
+    @Test
+    @Ignore
+    public void whenCallIsDaemon_thenCorrect() {
+        NewThread daemonThread = new NewThread();
+        NewThread userThread = new NewThread();
+        daemonThread.setDaemon(true);
+        daemonThread.start();
+        userThread.start();
+
+        assertTrue(daemonThread.isDaemon());
+        assertFalse(userThread.isDaemon());
+    }
+
+    @Test(expected = IllegalThreadStateException.class)
+    @Ignore
+    public void givenUserThread_whenSetDaemonWhileRunning_thenIllegalThreadStateException() {
+        NewThread daemonThread = new NewThread();
+        daemonThread.start();
+        daemonThread.setDaemon(true);
+    }
+}

core-java-concurrency/src/test/java/com/baeldung/concurrent/runnable/RunnableVsThreadTest.java

@@ -0,0 +1,138 @@
+package com.baeldung.concurrent.runnable;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import org.apache.commons.lang3.RandomUtils;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RunnableVsThreadTest {
+
+	private static Logger log = 
+	  LoggerFactory.getLogger(RunnableVsThreadTest.class);
+
+	private static ExecutorService executorService;
+	
+	@BeforeClass
+	public static void setup() {
+		executorService = Executors.newCachedThreadPool(); 
+	}
+	
+	@Test
+	public void givenARunnable_whenRunIt_thenResult() throws Exception{
+		Thread thread = new Thread(new SimpleRunnable(
+		  "SimpleRunnable executed using Thread"));
+		thread.start();
+		thread.join();
+	}
+	
+	@Test
+	public void givenARunnable_whenSubmitToES_thenResult() throws Exception{
+		
+		executorService.submit(new SimpleRunnable(
+		  "SimpleRunnable executed using ExecutorService")).get();
+	}
+	
+	@Test
+	public void givenARunnableLambda_whenSubmitToES_thenResult() 
+	  throws Exception{
+		
+		executorService.submit(()-> 
+		  log.info("Lambda runnable executed!!!")).get();
+	}
+	
+	@Test
+	public void givenAThread_whenRunIt_thenResult() throws Exception{
+		Thread thread = new SimpleThread(
+		  "SimpleThread executed using Thread");
+		thread.start();
+		thread.join();
+	}
+	
+	@Test
+	public void givenAThread_whenSubmitToES_thenResult() throws Exception{
+		
+		executorService.submit(new SimpleThread(
+		  "SimpleThread executed using ExecutorService")).get();
+	}
+	
+	@Test
+	public void givenACallable_whenSubmitToES_thenResult() throws Exception {
+		
+		Future<Integer> future = executorService.submit(
+		  new SimpleCallable());
+		log.info("Result from callable: {}", future.get());
+	}
+	
+	@Test
+	public void givenACallableAsLambda_whenSubmitToES_thenResult() 
+	  throws Exception {
+		
+		Future<Integer> future = executorService.submit(() -> {
+		  return RandomUtils.nextInt(0, 100);
+		});
+		
+		log.info("Result from callable: {}", future.get());
+	}
+	
+	@AfterClass
+	public static void tearDown() {
+		if ( executorService != null && !executorService.isShutdown()) {
+			executorService.shutdown();
+		}
+	}
+}
+
+class SimpleThread extends Thread{
+	
+	private static final Logger log = 
+	  LoggerFactory.getLogger(SimpleThread.class);
+	
+	private String message;
+	
+	public SimpleThread(String message) {
+		this.message = message;
+	}
+	
+	@Override
+	public void run() {
+		log.info(message);
+	}
+}
+
+class SimpleRunnable implements Runnable {
+
+	private static final Logger log = 
+	  LoggerFactory.getLogger(SimpleRunnable.class);
+	
+	private String message;
+	
+	public SimpleRunnable(String message) {
+		this.message = message;
+	}
+	
+	
+	@Override
+	public void run() {
+		log.info(message);
+	}
+}
+
+class SimpleCallable implements Callable<Integer> {
+
+	@Override
+	public Integer call() throws Exception {
+		return RandomUtils.nextInt(0, 100);
+	}
+
+}
+

core-java/src/main/java/com/baeldung/array/ArrayInitializer.java

@@ -2,73 +2,77 @@ package com.baeldung.array;
 
 import java.util.Arrays;
 
+import org.apache.commons.lang.ArrayUtils;
+
 public class ArrayInitializer {
 
-    public static int[] initializeArrayInLoop() {
+    static int[] initializeArrayInLoop() {
         int array[] = new int[5];
-        for (int i = 0; i < array.length; i++)
+        for (int i = 0; i < array.length; i++) {
             array[i] = i + 2;
+        }
         return array;
     }
 
-    public static int[][] initializeMultiDimensionalArrayInLoop() {
+    static int[][] initializeMultiDimensionalArrayInLoop() {
         int array[][] = new int[2][5];
-        for (int i = 0; i < 2; i++)
-            for (int j = 0; j < 5; j++)
+        for (int i = 0; i < 2; i++) {
+            for (int j = 0; j < 5; j++) {
                 array[i][j] = j + 1;
+            }
+        }
+
         return array;
     }
 
-    public static String[] initializeArrayAtTimeOfDeclarationMethod1() {
+    static String[] initializeArrayAtTimeOfDeclarationMethod1() {
         String array[] = new String[] { "Toyota", "Mercedes", "BMW", "Volkswagen", "Skoda" };
         return array;
     }
 
-    public static int[] initializeArrayAtTimeOfDeclarationMethod2() {
+    static int[] initializeArrayAtTimeOfDeclarationMethod2() {
         int[] array = new int[] { 1, 2, 3, 4, 5 };
         return array;
     }
 
-    public static int[] initializeArrayAtTimeOfDeclarationMethod3() {
+    static int[] initializeArrayAtTimeOfDeclarationMethod3() {
         int array[] = { 1, 2, 3, 4, 5 };
         return array;
     }
 
-    public static long[] initializeArrayUsingArraysFill() {
+    static long[] initializeArrayUsingArraysFill() {
         long array[] = new long[5];
         Arrays.fill(array, 30);
         return array;
     }
 
-    public static int[] initializeArrayRangeUsingArraysFill() {
+    static int[] initializeArrayRangeUsingArraysFill() {
         int array[] = new int[5];
         Arrays.fill(array, 0, 3, -50);
         return array;
     }
 
-    public static int[] initializeArrayUsingArraysCopy() {
+    static int[] initializeArrayUsingArraysCopy() {
         int array[] = { 1, 2, 3, 4, 5 };
         int[] copy = Arrays.copyOf(array, 5);
         return copy;
     }
 
-    public static int[] initializeLargerArrayUsingArraysCopy() {
+    static int[] initializeLargerArrayUsingArraysCopy() {
         int array[] = { 1, 2, 3, 4, 5 };
         int[] copy = Arrays.copyOf(array, 6);
         return copy;
     }
 
-    public static int[] initializeArrayUsingArraysSetAll() {
+    static int[] initializeArrayUsingArraysSetAll() {
         int[] array = new int[20];
 
-        for (int i = 0; i < 20; i++) {
-            Arrays.setAll(array, p -> {
-                if (p > 9)
-                    return 0;
-                else
-                    return p;
-            });
-        }
+        Arrays.setAll(array, p -> p > 9 ? 0 : p);
         return array;
     }
+
+    static char[] initializeArrayUsingArraysUtilClone() {
+        char[] array = new char[] { 'a', 'b', 'c' };
+        return ArrayUtils.clone(array);
+    }
 }

core-java/src/main/java/com/baeldung/java/nio/selector/EchoServer.java

@@ -13,6 +13,8 @@ import java.util.Set;
 
 public class EchoServer {
 
+    private static final String POISON_PILL = "POISON_PILL";
+
     public static void main(String[] args) throws IOException {
         Selector selector = Selector.open();
         ServerSocketChannel serverSocket = ServerSocketChannel.open();
@@ -30,23 +32,36 @@ public class EchoServer {
                 SelectionKey key = iter.next();
 
                 if (key.isAcceptable()) {
-                    SocketChannel client = serverSocket.accept();
-                    client.configureBlocking(false);
-                    client.register(selector, SelectionKey.OP_READ);
+                    register(selector, serverSocket);
                 }
 
                 if (key.isReadable()) {
-                    SocketChannel client = (SocketChannel) key.channel();
-                    client.read(buffer);
-                    buffer.flip();
-                    client.write(buffer);
-                    buffer.clear();
+                    answerWithEcho(buffer, key);
                 }
                 iter.remove();
             }
         }
     }
 
+    private static void answerWithEcho(ByteBuffer buffer, SelectionKey key) throws IOException {
+        SocketChannel client = (SocketChannel) key.channel();
+        client.read(buffer);
+        if (new String(buffer.array()).trim().equals(POISON_PILL)) {
+            client.close();
+            System.out.println("Not accepting client messages anymore");
+        }
+
+        buffer.flip();
+        client.write(buffer);
+        buffer.clear();
+    }
+
+    private static void register(Selector selector, ServerSocketChannel serverSocket) throws IOException {
+        SocketChannel client = serverSocket.accept();
+        client.configureBlocking(false);
+        client.register(selector, SelectionKey.OP_READ);
+    }
+
     public static Process start() throws IOException, InterruptedException {
         String javaHome = System.getProperty("java.home");
         String javaBin = javaHome + File.separator + "bin" + File.separator + "java";

core-java/src/test/java/com/baeldung/array/ArrayInitializerTest.java

@@ -8,6 +8,7 @@ import static com.baeldung.array.ArrayInitializer.initializeArrayRangeUsingArray
 import static com.baeldung.array.ArrayInitializer.initializeArrayUsingArraysCopy;
 import static com.baeldung.array.ArrayInitializer.initializeArrayUsingArraysFill;
 import static com.baeldung.array.ArrayInitializer.initializeArrayUsingArraysSetAll;
+import static com.baeldung.array.ArrayInitializer.initializeArrayUsingArraysUtilClone;
 import static com.baeldung.array.ArrayInitializer.initializeLargerArrayUsingArraysCopy;
 import static com.baeldung.array.ArrayInitializer.initializeMultiDimensionalArrayInLoop;
 import static org.junit.Assert.assertArrayEquals;
@@ -65,4 +66,9 @@ public class ArrayInitializerTest {
     public void whenInitializeLargerArrayRangeUsingArraysSetAll_thenCorrect() {
         assertArrayEquals(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, initializeArrayUsingArraysSetAll());
     }
+
+    @Test
+    public void whenInitializeArrayUsingArraysUtilClone_thenCorrect() {
+        assertArrayEquals(new char[] { 'a', 'b', 'c' }, initializeArrayUsingArraysUtilClone());
+    }
 }

core-java/src/test/java/com/baeldung/string/StringTest.java

@@ -5,6 +5,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import java.io.UnsupportedEncodingException;
 import java.nio.charset.StandardCharsets;
 import java.util.IllegalFormatException;
 import java.util.regex.PatternSyntaxException;
@@ -29,11 +30,17 @@ public class StringTest {
     }
 
     @Test
-    public void whenGetBytes_thenCorrect() {
-        byte[] byteArray = "abcd".getBytes();
-        byte[] expected = new byte[] { 97, 98, 99, 100 };
+    public void whenGetBytes_thenCorrect() throws UnsupportedEncodingException {
+        byte[] byteArray1 = "abcd".getBytes();
+        byte[] byteArray2 = "efgh".getBytes(StandardCharsets.US_ASCII);
+        byte[] byteArray3 = "ijkl".getBytes("UTF-8");
+        byte[] expected1 = new byte[] { 97, 98, 99, 100 };
+        byte[] expected2 = new byte[] { 101, 102, 103, 104 };
+        byte[] expected3 = new byte[] { 105, 106, 107, 108 };
 
-        assertArrayEquals(expected, byteArray);
+        assertArrayEquals(expected1, byteArray1);
+        assertArrayEquals(expected2, byteArray2);
+        assertArrayEquals(expected3, byteArray3);
     }
 
     @Test
@@ -123,6 +130,7 @@ public class StringTest {
     @Test
     public void whenCallLastIndexOf_thenCorrect() {
         assertEquals(2, "foo".lastIndexOf("o"));
+        assertEquals(2, "foo".lastIndexOf(111));
     }
 
     @Test

core-kotlin/src/main/kotlin/com/baeldung/datetime/UseDuration.kt

@@ -0,0 +1,15 @@
+package com.baeldung.datetime
+
+import java.time.Duration
+import java.time.LocalTime
+
+class UseDuration {
+
+    fun modifyDates(localTime: LocalTime, duration: Duration): LocalTime {
+        return localTime.plus(duration)
+    }
+
+    fun getDifferenceBetweenDates(localTime1: LocalTime, localTime2: LocalTime): Duration {
+        return Duration.between(localTime1, localTime2)
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/datetime/UseLocalDate.kt

@@ -0,0 +1,42 @@
+package com.baeldung.datetime
+
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.LocalDateTime
+import java.time.temporal.ChronoUnit
+import java.time.temporal.TemporalAdjusters
+
+class UseLocalDate {
+
+    fun getLocalDateUsingFactoryOfMethod(year: Int, month: Int, dayOfMonth: Int): LocalDate {
+        return LocalDate.of(year, month, dayOfMonth)
+    }
+
+    fun getLocalDateUsingParseMethod(representation: String): LocalDate {
+        return LocalDate.parse(representation)
+    }
+
+    fun getLocalDateFromClock(): LocalDate {
+        return LocalDate.now()
+    }
+
+    fun getNextDay(localDate: LocalDate): LocalDate {
+        return localDate.plusDays(1)
+    }
+
+    fun getPreviousDay(localDate: LocalDate): LocalDate {
+        return localDate.minus(1, ChronoUnit.DAYS)
+    }
+
+    fun getDayOfWeek(localDate: LocalDate): DayOfWeek {
+        return localDate.dayOfWeek
+    }
+
+    fun getFirstDayOfMonth(): LocalDate {
+        return LocalDate.now().with(TemporalAdjusters.firstDayOfMonth())
+    }
+
+    fun getStartOfDay(localDate: LocalDate): LocalDateTime {
+        return localDate.atStartOfDay()
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/datetime/UseLocalDateTime.kt

@@ -0,0 +1,10 @@
+package com.baeldung.datetime
+
+import java.time.LocalDateTime
+
+class UseLocalDateTime {
+
+    fun getLocalDateTimeUsingParseMethod(representation: String): LocalDateTime {
+        return LocalDateTime.parse(representation)
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/datetime/UseLocalTime.kt

@@ -0,0 +1,32 @@
+package com.baeldung.datetime
+
+import java.time.LocalDateTime
+import java.time.LocalTime
+import java.time.temporal.ChronoUnit
+
+class UseLocalTime {
+
+    fun getLocalTimeUsingFactoryOfMethod(hour: Int, min: Int, seconds: Int): LocalTime {
+        return LocalTime.of(hour, min, seconds)
+    }
+
+    fun getLocalTimeUsingParseMethod(timeRepresentation: String): LocalTime {
+        return LocalTime.parse(timeRepresentation)
+    }
+
+    fun getLocalTimeFromClock(): LocalTime {
+        return LocalTime.now()
+    }
+
+    fun addAnHour(localTime: LocalTime): LocalTime {
+        return localTime.plus(1, ChronoUnit.HOURS)
+    }
+
+    fun getHourFromLocalTime(localTime: LocalTime): Int {
+        return localTime.hour
+    }
+
+    fun getLocalTimeWithMinuteSetToValue(localTime: LocalTime, minute: Int): LocalTime {
+        return localTime.withMinute(minute)
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/datetime/UsePeriod.kt

@@ -0,0 +1,15 @@
+package com.baeldung.datetime
+
+import java.time.LocalDate
+import java.time.Period
+
+class UsePeriod {
+
+    fun modifyDates(localDate: LocalDate, period: Period): LocalDate {
+        return localDate.plus(period)
+    }
+
+    fun getDifferenceBetweenDates(localDate1: LocalDate, localDate2: LocalDate): Period {
+        return Period.between(localDate1, localDate2)
+    }
+}

core-kotlin/src/main/kotlin/com/baeldung/datetime/UseZonedDateTime.kt

@@ -0,0 +1,12 @@
+package com.baeldung.datetime
+
+import java.time.LocalDateTime
+import java.time.ZoneId
+import java.time.ZonedDateTime
+
+class UseZonedDateTime {
+
+    fun getZonedDateTime(localDateTime: LocalDateTime, zoneId: ZoneId): ZonedDateTime {
+        return ZonedDateTime.of(localDateTime, zoneId)
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/datetime/UseLocalDateTimeUnitTest.kt

@@ -0,0 +1,23 @@
+package com.baeldung.kotlin.datetime
+
+import com.baeldung.datetime.UseLocalDateTime
+import java.time.LocalDate
+import java.time.LocalTime
+import java.time.Month
+
+import org.junit.Test
+
+import org.junit.Assert.assertEquals
+
+class UseLocalDateTimeUnitTest {
+
+    var useLocalDateTime = UseLocalDateTime()
+
+    @Test
+    fun givenString_whenUsingParse_thenLocalDateTime() {
+        assertEquals(LocalDate.of(2016, Month.MAY, 10), useLocalDateTime.getLocalDateTimeUsingParseMethod("2016-05-10T06:30")
+                .toLocalDate())
+        assertEquals(LocalTime.of(6, 30), useLocalDateTime.getLocalDateTimeUsingParseMethod("2016-05-10T06:30")
+                .toLocalTime())
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/datetime/UseLocalDateUnitTest.kt

@@ -0,0 +1,59 @@
+package com.baeldung.kotlin.datetime
+
+import com.baeldung.datetime.UseLocalDate
+import org.junit.Assert
+import org.junit.Test
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.LocalDateTime
+
+class UseLocalDateUnitTest {
+
+    var useLocalDate = UseLocalDate()
+
+    @Test
+    fun givenValues_whenUsingFactoryOf_thenLocalDate() {
+        Assert.assertEquals("2016-05-10", useLocalDate.getLocalDateUsingFactoryOfMethod(2016, 5, 10)
+                .toString())
+    }
+
+    @Test
+    fun givenString_whenUsingParse_thenLocalDate() {
+        Assert.assertEquals("2016-05-10", useLocalDate.getLocalDateUsingParseMethod("2016-05-10")
+                .toString())
+    }
+
+    @Test
+    fun whenUsingClock_thenLocalDate() {
+        Assert.assertEquals(LocalDate.now(), useLocalDate.getLocalDateFromClock())
+    }
+
+    @Test
+    fun givenDate_whenUsingPlus_thenNextDay() {
+        Assert.assertEquals(LocalDate.now()
+                .plusDays(1), useLocalDate.getNextDay(LocalDate.now()))
+    }
+
+    @Test
+    fun givenDate_whenUsingMinus_thenPreviousDay() {
+        Assert.assertEquals(LocalDate.now()
+                .minusDays(1), useLocalDate.getPreviousDay(LocalDate.now()))
+    }
+
+    @Test
+    fun givenToday_whenUsingGetDayOfWeek_thenDayOfWeek() {
+        Assert.assertEquals(DayOfWeek.SUNDAY, useLocalDate.getDayOfWeek(LocalDate.parse("2016-05-22")))
+    }
+
+    @Test
+    fun givenToday_whenUsingWithTemporalAdjuster_thenFirstDayOfMonth() {
+        Assert.assertEquals(1, useLocalDate.getFirstDayOfMonth()
+                .dayOfMonth.toLong())
+    }
+
+    @Test
+    fun givenLocalDate_whenUsingAtStartOfDay_thenReturnMidnight() {
+        Assert.assertEquals(LocalDateTime.parse("2016-05-22T00:00:00"), useLocalDate.getStartOfDay(LocalDate.parse("2016-05-22")))
+    }
+
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/datetime/UseLocalTimeUnitTest.kt

@@ -0,0 +1,37 @@
+package com.baeldung.kotlin.datetime
+
+import com.baeldung.datetime.UseLocalTime
+import java.time.LocalTime
+
+import org.junit.Assert
+import org.junit.Test
+
+class UseLocalTimeUnitTest {
+
+    internal var useLocalTime = UseLocalTime()
+
+    @Test
+    fun givenValues_whenUsingFactoryOf_thenLocalTime() {
+        Assert.assertEquals("07:07:07", useLocalTime.getLocalTimeUsingFactoryOfMethod(7, 7, 7).toString())
+    }
+
+    @Test
+    fun givenString_whenUsingParse_thenLocalTime() {
+        Assert.assertEquals("06:30", useLocalTime.getLocalTimeUsingParseMethod("06:30").toString())
+    }
+
+    @Test
+    fun givenTime_whenAddHour_thenLocalTime() {
+        Assert.assertEquals("07:30", useLocalTime.addAnHour(LocalTime.of(6, 30)).toString())
+    }
+
+    @Test
+    fun getHourFromLocalTime() {
+        Assert.assertEquals(1, useLocalTime.getHourFromLocalTime(LocalTime.of(1, 1)).toLong())
+    }
+
+    @Test
+    fun getLocalTimeWithMinuteSetToValue() {
+        Assert.assertEquals(LocalTime.of(10, 20), useLocalTime.getLocalTimeWithMinuteSetToValue(LocalTime.of(10, 10), 20))
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/datetime/UsePeriodUnitTest.kt

@@ -0,0 +1,28 @@
+package com.baeldung.kotlin.datetime
+
+import com.baeldung.datetime.UsePeriod
+import java.time.LocalDate
+import java.time.Period
+
+import org.junit.Assert
+import org.junit.Test
+
+class UsePeriodUnitTest {
+
+    var usingPeriod = UsePeriod()
+
+    @Test
+    fun givenPeriodAndLocalDate_thenCalculateModifiedDate() {
+        val period = Period.ofDays(1)
+        val localDate = LocalDate.parse("2007-05-10")
+        Assert.assertEquals(localDate.plusDays(1), usingPeriod.modifyDates(localDate, period))
+    }
+
+    @Test
+    fun givenDates_thenGetPeriod() {
+        val localDate1 = LocalDate.parse("2007-05-10")
+        val localDate2 = LocalDate.parse("2007-05-15")
+
+        Assert.assertEquals(Period.ofDays(5), usingPeriod.getDifferenceBetweenDates(localDate1, localDate2))
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/datetime/UseZonedDateTimeUnitTest.kt

@@ -0,0 +1,19 @@
+package com.baeldung.kotlin.datetime
+
+import com.baeldung.datetime.UseZonedDateTime
+import org.junit.Assert
+import org.junit.Test
+import java.time.LocalDateTime
+import java.time.ZoneId
+
+class UseZonedDateTimeUnitTest {
+
+    internal var zonedDateTime = UseZonedDateTime()
+
+    @Test
+    fun givenZoneId_thenZonedDateTime() {
+        val zoneId = ZoneId.of("Europe/Paris")
+        val zonedDatetime = zonedDateTime.getZonedDateTime(LocalDateTime.parse("2016-05-20T06:30"), zoneId)
+        Assert.assertEquals(zoneId, ZoneId.from(zonedDatetime))
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/CalculatorTest5.kt

@@ -7,12 +7,12 @@ class CalculatorTest5 {
     private val calculator = Calculator()
 
     @Test
-    fun testAddition() {
+    fun whenAdding1and3_thenAnswerIs4() {
         Assertions.assertEquals(4, calculator.add(1, 3))
     }
 
     @Test
-    fun testDivideByZero() {
+    fun whenDividingBy0_thenErrorOccurs() {
         val exception = Assertions.assertThrows(DivideByZeroException::class.java) {
             calculator.divide(5, 0)
         }
@@ -21,7 +21,7 @@ class CalculatorTest5 {
     }
 
     @Test
-    fun testSquares() {
+    fun whenSquaringNumbers_thenCorrectAnswerGiven() {
         Assertions.assertAll(
                 Executable { Assertions.assertEquals(1, calculator.square(1)) },
                 Executable { Assertions.assertEquals(4, calculator.square(2)) },
@@ -31,9 +31,9 @@ class CalculatorTest5 {
 
     @TestFactory
     fun testSquaresFactory() = listOf(
-            DynamicTest.dynamicTest("1 squared") { Assertions.assertEquals(1,calculator.square(1))},
-            DynamicTest.dynamicTest("2 squared") { Assertions.assertEquals(4,calculator.square(2))},
-            DynamicTest.dynamicTest("3 squared") { Assertions.assertEquals(9,calculator.square(3))}
+            DynamicTest.dynamicTest("when I calculate 1^2 then I get 1") { Assertions.assertEquals(1,calculator.square(1))},
+            DynamicTest.dynamicTest("when I calculate 2^2 then I get 4") { Assertions.assertEquals(4,calculator.square(2))},
+            DynamicTest.dynamicTest("when I calculate 3^2 then I get 9") { Assertions.assertEquals(9,calculator.square(3))}
     )
 
     @TestFactory
@@ -44,7 +44,7 @@ class CalculatorTest5 {
             4 to 16,
             5 to 25)
             .map { (input, expected) ->
-                DynamicTest.dynamicTest("$input squared") {
+                DynamicTest.dynamicTest("when I calculate $input^2 then I get $expected") {
                     Assertions.assertEquals(expected, calculator.square(input))
                 }
             }
@@ -59,14 +59,14 @@ class CalculatorTest5 {
     @TestFactory
     fun testSquaresFactory3() = squaresTestData
             .map { (input, expected) ->
-                DynamicTest.dynamicTest("$input squared") {
+                DynamicTest.dynamicTest("when I calculate $input^2 then I get $expected") {
                     Assertions.assertEquals(expected, calculator.square(input))
                 }
             }
     @TestFactory
     fun testSquareRootsFactory3() = squaresTestData
             .map { (expected, input) ->
-                DynamicTest.dynamicTest("Square root of $input") {
+                DynamicTest.dynamicTest("I calculate the square root of $input then I get $expected") {
                     Assertions.assertEquals(expected.toDouble(), calculator.squareRoot(input))
                 }
             }
@@ -76,7 +76,7 @@ class CalculatorTest5 {
             Tag("logarithms")
     )
     @Test
-    fun testLogarithms() {
+    fun whenIcalculateLog2Of8_thenIget3() {
         Assertions.assertEquals(3.0, calculator.log(2, 8))
     }
 }

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/SimpleTest5.kt

@@ -6,14 +6,14 @@ import org.junit.jupiter.api.Test
 
 class SimpleTest5 {
     @Test
-    fun testEmpty() {
+    fun whenEmptyList_thenListIsEmpty() {
         val list = listOf<String>()
         Assertions.assertTrue(list::isEmpty)
     }
 
     @Test
     @Disabled
-    fun testMessage() {
+    fun when3equals4_thenTestFails() {
         Assertions.assertEquals(3, 4) {
             "Three does not equal four"
         }

drools/backward-chaining/src/main/java/com/baeldung/drools/BackwardChaining.java

@@ -0,0 +1,33 @@
+package com.baeldung.drools;
+
+import org.kie.api.KieServices;
+import org.kie.api.runtime.KieContainer;
+import org.kie.api.runtime.KieSession;
+
+import com.baeldung.drools.model.Fact;
+import com.baeldung.drools.model.Result;
+
+public class BackwardChaining {
+    public static void main(String[] args) {
+        Result result = new BackwardChaining().backwardChaining();
+        System.out.println(result.getValue());
+        result.getFacts().stream().forEach(System.out::println);
+    }
+
+    public Result backwardChaining() {
+        Result result = new Result();
+        KieServices ks = KieServices.Factory.get();
+        KieContainer kContainer = ks.getKieClasspathContainer();
+        KieSession ksession = kContainer.newKieSession("ksession-backward-chaining");
+        ksession.setGlobal("result", result);
+        ksession.insert(new Fact("Asia", "Planet Earth"));
+//        ksession.insert(new Fact("China", "Asia"));
+        ksession.insert(new Fact("Great Wall of China", "China"));
+
+        ksession.fireAllRules();
+
+        return result;
+
+    }
+
+}

drools/backward-chaining/src/main/java/com/baeldung/drools/model/Fact.java

@@ -0,0 +1,69 @@
+package com.baeldung.drools.model;
+
+import org.kie.api.definition.type.Position;
+
+public class Fact {
+
+    @Position(0)
+    private String element;
+
+    @Position(1)
+    private String place;
+
+    public Fact(String element, String place) {
+        this.element = element;
+        this.place = place;
+    }
+
+    public String getElement() {
+        return element;
+    }
+
+    public void setElement(String element) {
+        this.element = element;
+    }
+
+    public String getPlace() {
+        return place;
+    }
+
+    public void setPlace(String place) {
+        this.place = place;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((element == null) ? 0 : element.hashCode());
+        result = prime * result + ((place == null) ? 0 : place.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Fact other = (Fact) obj;
+        if (element == null) {
+            if (other.element != null)
+                return false;
+        } else if (!element.equals(other.element))
+            return false;
+        if (place == null) {
+            if (other.place != null)
+                return false;
+        } else if (!place.equals(other.place))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "Fact{" + "element='" + element + '\'' + ", place='" + place + '\'' + '}';
+    }
+}

drools/backward-chaining/src/main/java/com/baeldung/drools/model/Result.java

@@ -0,0 +1,31 @@
+package com.baeldung.drools.model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Result {
+    private String value;
+    private List<String> facts = new ArrayList<>();
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+
+    public List<String> getFacts() {
+        return facts;
+    }
+
+    public void setFacts(List<String> facts) {
+        this.facts = facts;
+    }
+    
+    public void addFact(String fact) {
+        this.facts.add(fact);
+    }
+    
+    
+}

drools/backward-chaining/src/main/resources/META-INF/maven/pom.properties

@@ -0,0 +1,3 @@
+groupId=com.baeldung.drools
+artifactId=DroosBackwardChaining
+version=1.0.0-SNAPSHOT

drools/backward-chaining/src/main/resources/backward_chaining/rules.drl

@@ -0,0 +1,34 @@
+package com.baeldung
+
+import com.baeldung.drools.model.Fact;
+
+global com.baeldung.drools.model.Result result;
+
+dialect  "mvel"
+
+query belongsTo(String x, String y)
+  Fact(x, y;)
+  or
+  (Fact(z, y;) and belongsTo(x, z;))
+end
+
+rule "Great Wall of China BELONGS TO Planet Earth"
+when
+    belongsTo("Great Wall of China", "Planet Earth";)
+then
+	result.setValue("Decision one taken: Great Wall of China BELONGS TO Planet Earth");
+end
+
+rule "Great Wall of China DOES NOT BELONG TO of Planet Earth"
+when
+    not belongsTo("Great Wall of China", "Planet Earth";)
+then
+    result.setValue("Decision two taken: Great Wall of China DOES NOT BELONG TO Planet Earth");
+end
+
+rule "print all facts"
+when
+    belongsTo(element, place;)
+then
+    result.addFact(element + " IS ELEMENT OF " + place);
+end

drools/backward-chaining/src/test/java/com/baeldung/test/BackwardChainingTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.test;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.kie.api.KieServices;
+import org.kie.api.runtime.KieContainer;
+import org.kie.api.runtime.KieSession;
+
+import com.baeldung.drools.model.Fact;
+import com.baeldung.drools.model.Result;
+
+import static junit.framework.TestCase.assertEquals;
+
+@RunWith(value = JUnit4.class)
+public class BackwardChainingTest {
+    private Result result;
+    private KieServices ks;
+    private KieContainer kContainer;
+    private KieSession ksession;
+
+    @Before
+    public void before() {
+        result = new Result();
+        ks = KieServices.Factory.get();
+        kContainer = ks.getKieClasspathContainer();
+        ksession = kContainer.newKieSession("ksession-backward-chaining");
+        ksession.setGlobal("result", result);
+    }
+
+    @Test
+    public void whenWallOfChinaIsGiven_ThenItBelongsToPlanetEarth() {
+
+        ksession.setGlobal("result", result);
+        ksession.insert(new Fact("Asia", "Planet Earth"));
+        ksession.insert(new Fact("China", "Asia"));
+        ksession.insert(new Fact("Great Wall of China", "China"));
+
+        ksession.fireAllRules();
+        
+        // Assert Decision one
+        assertEquals(result.getValue(), "Decision one taken: Great Wall of China BELONGS TO Planet Earth");
+    }
+
+    @Test
+    public void whenChinaIsNotGiven_ThenWallOfChinaDoesNotBelongToPlanetEarth() {
+        ksession.insert(new Fact("Asia", "Planet Earth"));
+        // ksession.insert(new Location("China", "Asia")); // not provided to force Decision two
+        ksession.insert(new Fact("Great Wall of China", "China"));
+        
+        ksession.fireAllRules();
+        
+        // Assert Decision two
+        assertEquals(result.getValue(), "Decision two taken: Great Wall of China DOES NOT BELONG TO Planet Earth");
+    }
+}

ejb/wildfly/widlfly-web/src/main/java/TestEJBServlet.java

@@ -1,5 +1,6 @@
 
 import java.io.IOException;
+import java.io.PrintWriter;
 import java.util.List;
 
 import javax.ejb.EJB;
@@ -15,19 +16,32 @@ import wildfly.beans.UserBeanLocal;
  * Servlet implementation class TestEJBServlet
  */
 public class TestEJBServlet extends HttpServlet {
-    private static final long serialVersionUID = 1L;
+	private static final long serialVersionUID = 1L;
 
-    @EJB
-    private UserBeanLocal userBean;
+	@EJB
+	private UserBeanLocal userBean;
 
-    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        List<User> users = userBean.getUsers();
+	protected void doGet(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException {
+		List<User> users = userBean.getUsers();
 
-        response.getWriter()
-            .append("The number of users is: " + users.size());
-    }
+		PrintWriter out = response.getWriter();
 
-    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        doGet(request, response);
-    }
+		out.println("<html>");
+		out.println("<head><title>Users</title></head>");
+		out.println("<body>");
+		out.println("<center><h1>List of users:</h1>");
+		out.println("<table border=\"1\" align=\"center\" style=\"width:50%\">");
+		for (User user : users) {
+			out.println("<tr>");
+			out.print("<td>" + user.getUsername() + "</td>");
+			out.print("<td>" + user.getEmail() + "</td>");
+			out.println("</tr>");
+		}
+	}
+
+	protected void doPost(HttpServletRequest request, HttpServletResponse response)
+			throws ServletException, IOException {
+		doGet(request, response);
+	}
 }

ejb/wildfly/wildfly-jpa/src/main/resources/META-INF/persistence.xml

@@ -3,7 +3,13 @@
 	xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
 	<persistence-unit name="wildfly-jpa" transaction-type="JTA">
-		<jta-data-source>java:/PostgresDS</jta-data-source>
+		<jta-data-source>java:/H2DS</jta-data-source>
 		<class>model.User</class>
+        <properties>
+            <property name="hibernate.hbm2ddl.auto" value="create-drop" />
+            <property name="hibernate.show_sql" value="true" />
+            <property name="hibernate.hbm2ddl.auto" value="create" />
+            <property name="hibernate.hbm2ddl.import_files" value="data.sql" />
+        </properties>
 	</persistence-unit>
 </persistence>

ejb/wildfly/wildfly-jpa/src/main/resources/data.sql

@@ -0,0 +1 @@
+INSERT INTO users (username, email, postal_number) VALUES ('user1', 'user1@baeldung.com', 1000), ('user2', 'user2@baeldung.com', 2);

guest/spring-mvc/README.md

@@ -0,0 +1,17 @@
+## Building
+
+To build the module, use Maven's `package` goal:
+
+```
+mvn clean package
+```
+
+## Running
+
+To run the application, use Spring Boot's `run` goal:
+
+```
+mvn spring-boot:run
+```
+
+The application will be accessible at [http://localhost:8080/](http://localhost:8080/)

guest/spring-mvc/pom.xml

@@ -3,7 +3,7 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>com.forketyfork.guest</groupId>
+    <groupId>com.stackify.guest</groupId>
     <artifactId>spring-mvc</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/Spring5Application.java

@@ -1,11 +1,11 @@
-package com.forketyfork.guest.springmvc;
+package com.stackify.guest.springmvc;
 
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.boot.SpringApplication;
 
 @SpringBootApplication
-@ComponentScan(basePackages = {"com.forketyfork.guest.springmvc"})
+@ComponentScan(basePackages = {"com.stackify.guest.springmvc"})
 public class Spring5Application {
 
     public static void main(String[] args) {

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/model/LoginData.java

@@ -1,4 +1,4 @@
-package com.forketyfork.guest.springmvc.model;
+package com.stackify.guest.springmvc.model;
 
 public class LoginData {
 

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/web/InternalsController.java

@@ -1,11 +1,14 @@
-package com.forketyfork.guest.springmvc.web;
+package com.stackify.guest.springmvc.web;
 
-import com.forketyfork.guest.springmvc.model.LoginData;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.servlet.ModelAndView;
 
+import com.stackify.guest.springmvc.model.LoginData;
+
 import java.util.Collections;
 
 @Controller
@@ -28,4 +31,10 @@ public class InternalsController {
         }
     }
 
+    @ResponseBody
+    @PostMapping("/message")
+    public MyOutputResource sendMessage(@RequestBody MyInputResource inputResource) {
+        return new MyOutputResource("Received: " + inputResource.getRequestMessage());
+    }
+
 }

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/web/MyInputResource.java

@@ -0,0 +1,14 @@
+package com.stackify.guest.springmvc.web;
+
+public class MyInputResource {
+
+    private String requestMessage;
+
+    public String getRequestMessage() {
+        return requestMessage;
+    }
+
+    public void setRequestMessage(String requestMessage) {
+        this.requestMessage = requestMessage;
+    }
+}

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/web/MyOutputResource.java

@@ -0,0 +1,15 @@
+package com.stackify.guest.springmvc.web;
+
+public class MyOutputResource {
+
+    private String responseMessage;
+
+    public MyOutputResource(String responseMessage) {
+        this.responseMessage = responseMessage;
+    }
+
+    public String getResponseMessage() {
+        return responseMessage;
+    }
+
+}

guest/spring-mvc/src/main/java/com/stackify/guest/springmvc/web/RestfulWebServiceController.java

@@ -0,0 +1,14 @@
+package com.stackify.guest.springmvc.web;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class RestfulWebServiceController {
+
+    @GetMapping("/message")
+    public MyOutputResource getMessage() {
+        return new MyOutputResource("Hello!");
+    }
+
+}

hibernate5/README.md

@@ -1 +1,3 @@
 ## Relevant articles:
+
+- [Dynamic Mapping with Hibernate](http://www.baeldung.com/hibernate-dynamic-mapping)

hibernate5/pom.xml

@@ -22,13 +22,19 @@
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
-            <version>5.2.9.Final</version>
+            <version>5.2.12.Final</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>4.12</version>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>3.8.0</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>

hibernate5/src/main/java/com/baeldung/hibernate/HibernateMultiTenantUtil.java

@@ -68,7 +68,7 @@ public class HibernateMultiTenantUtil {
         Properties properties = new Properties();
         URL propertiesURL = Thread.currentThread()
             .getContextClassLoader()
-            .getResource("hibernate.properties");
+            .getResource("hibernate-multitenancy.properties");
         FileInputStream inputStream = new FileInputStream(propertiesURL.getFile());
         properties.load(inputStream);
         System.out.println("LOADED PROPERTIES FROM hibernate.properties");

hibernate5/src/main/java/com/baeldung/hibernate/HibernateUtil.java

@@ -1,24 +1,60 @@
 package com.baeldung.hibernate;
 
+import com.baeldung.hibernate.pojo.Employee;
+import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.Phone;
+import com.baeldung.hibernate.pojo.TemporalValues;
 import org.hibernate.SessionFactory;
-import org.hibernate.cfg.Configuration;
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.service.ServiceRegistry;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Properties;
 
 public class HibernateUtil {
+    private static SessionFactory sessionFactory;
 
-    private static final SessionFactory sessionFactory;
-
-    static {
-        try {
-            Configuration configuration = new Configuration().configure();
-            sessionFactory = configuration.buildSessionFactory();
-
-        } catch (Throwable ex) {
-            System.err.println("Initial SessionFactory creation failed." + ex);
-            throw new ExceptionInInitializerError(ex);
+    public static SessionFactory getSessionFactory() throws IOException {
+        if (sessionFactory == null) {
+            ServiceRegistry serviceRegistry = configureServiceRegistry();
+            sessionFactory = makeSessionFactory(serviceRegistry);
         }
-    }
-
-    public static SessionFactory getSessionFactory() {
         return sessionFactory;
     }
+
+    private static SessionFactory makeSessionFactory(ServiceRegistry serviceRegistry) {
+        MetadataSources metadataSources = new MetadataSources(serviceRegistry);
+        metadataSources.addPackage("com.baeldung.hibernate.pojo");
+        metadataSources.addAnnotatedClass(Employee.class);
+        metadataSources.addAnnotatedClass(Phone.class);
+        metadataSources.addAnnotatedClass(EntityDescription.class);
+        metadataSources.addAnnotatedClass(TemporalValues.class);
+
+        Metadata metadata = metadataSources.buildMetadata();
+        return metadata.getSessionFactoryBuilder()
+                .build();
+
+    }
+
+    private static ServiceRegistry configureServiceRegistry() throws IOException {
+        Properties properties = getProperties();
+        return new StandardServiceRegistryBuilder().applySettings(properties)
+                .build();
+    }
+
+    private static Properties getProperties() throws IOException {
+        Properties properties = new Properties();
+        URL propertiesURL = Thread.currentThread()
+                .getContextClassLoader()
+                .getResource("hibernate.properties");
+        try (FileInputStream inputStream = new FileInputStream(propertiesURL.getFile())) {
+            properties.load(inputStream);
+        }
+        return properties;
+    }
+
 }

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Employee.java

@@ -0,0 +1,87 @@
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.*;
+
+import javax.persistence.Entity;
+import javax.persistence.*;
+import java.io.Serializable;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Where(clause = "deleted = false")
+@FilterDef(name = "incomeLevelFilter", parameters = @ParamDef(name = "incomeLimit", type = "int"))
+@Filter(name = "incomeLevelFilter", condition = "grossIncome > :incomeLimit")
+public class Employee implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private long grossIncome;
+
+    private int taxInPercents;
+
+    private boolean deleted;
+
+    public long getTaxJavaWay() {
+        return grossIncome * taxInPercents / 100;
+    }
+
+    @Formula("grossIncome * taxInPercents / 100")
+    private long tax;
+
+    @OneToMany
+    @JoinColumn(name = "employee_id")
+    @Where(clause = "deleted = false")
+    private Set<Phone> phones = new HashSet<>(0);
+
+    public Employee() {
+    }
+
+    public Employee(long grossIncome, int taxInPercents) {
+        this.grossIncome = grossIncome;
+        this.taxInPercents = taxInPercents;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public long getGrossIncome() {
+        return grossIncome;
+    }
+
+    public int getTaxInPercents() {
+        return taxInPercents;
+    }
+
+    public long getTax() {
+        return tax;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public void setGrossIncome(long grossIncome) {
+        this.grossIncome = grossIncome;
+    }
+
+    public void setTaxInPercents(int taxInPercents) {
+        this.taxInPercents = taxInPercents;
+    }
+
+    public boolean getDeleted() {
+        return deleted;
+    }
+
+    public void setDeleted(boolean deleted) {
+        this.deleted = deleted;
+    }
+
+    public Set<Phone> getPhones() {
+        return phones;
+    }
+
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/EntityDescription.java

@@ -0,0 +1,55 @@
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.Any;
+
+import javax.persistence.*;
+import java.io.Serializable;
+
+@Entity
+public class EntityDescription implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private String description;
+
+    @Any(
+            metaDef = "EntityDescriptionMetaDef",
+            metaColumn = @Column(name = "entity_type")
+    )
+    @JoinColumn(name = "entity_id")
+    private Serializable entity;
+
+    public EntityDescription() {
+    }
+
+    public EntityDescription(String description, Serializable entity) {
+        this.description = description;
+        this.entity = entity;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public Serializable getEntity() {
+        return entity;
+    }
+
+    public void setEntity(Serializable entity) {
+        this.entity = entity;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Phone.java

@@ -0,0 +1,50 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import java.io.Serializable;
+
+@Entity
+public class Phone implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private boolean deleted;
+
+    private String number;
+
+    public Phone() {
+    }
+
+    public Phone(String number) {
+        this.number = number;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public boolean isDeleted() {
+        return deleted;
+    }
+
+    public void setDeleted(boolean deleted) {
+        this.deleted = deleted;
+    }
+
+    public String getNumber() {
+        return number;
+    }
+
+    public void setNumber(String number) {
+        this.number = number;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/TemporalValues.java

@@ -0,0 +1,195 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.*;
+import java.io.Serializable;
+import java.sql.Date;
+import java.sql.Time;
+import java.sql.Timestamp;
+import java.time.*;
+import java.util.Calendar;
+
+@Entity
+public class TemporalValues implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private long id;
+
+    @Basic
+    private java.sql.Date sqlDate;
+
+    @Basic
+    private java.sql.Time sqlTime;
+
+    @Basic
+    private java.sql.Timestamp sqlTimestamp;
+
+    @Basic
+    @Temporal(TemporalType.DATE)
+    private java.util.Date utilDate;
+
+    @Basic
+    @Temporal(TemporalType.TIME)
+    private java.util.Date utilTime;
+
+    @Basic
+    @Temporal(TemporalType.TIMESTAMP)
+    private java.util.Date utilTimestamp;
+
+    @Basic
+    @Temporal(TemporalType.DATE)
+    private java.util.Calendar calendarDate;
+
+    @Basic
+    @Temporal(TemporalType.TIMESTAMP)
+    private java.util.Calendar calendarTimestamp;
+
+    @Basic
+    private java.time.LocalDate localDate;
+
+    @Basic
+    private java.time.LocalTime localTime;
+
+    @Basic
+    private java.time.OffsetTime offsetTime;
+
+    @Basic
+    private java.time.Instant instant;
+
+    @Basic
+    private java.time.LocalDateTime localDateTime;
+
+    @Basic
+    private java.time.OffsetDateTime offsetDateTime;
+
+    @Basic
+    private java.time.ZonedDateTime zonedDateTime;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public Date getSqlDate() {
+        return sqlDate;
+    }
+
+    public void setSqlDate(Date sqlDate) {
+        this.sqlDate = sqlDate;
+    }
+
+    public Time getSqlTime() {
+        return sqlTime;
+    }
+
+    public void setSqlTime(Time sqlTime) {
+        this.sqlTime = sqlTime;
+    }
+
+    public Timestamp getSqlTimestamp() {
+        return sqlTimestamp;
+    }
+
+    public void setSqlTimestamp(Timestamp sqlTimestamp) {
+        this.sqlTimestamp = sqlTimestamp;
+    }
+
+    public java.util.Date getUtilDate() {
+        return utilDate;
+    }
+
+    public void setUtilDate(java.util.Date utilDate) {
+        this.utilDate = utilDate;
+    }
+
+    public java.util.Date getUtilTime() {
+        return utilTime;
+    }
+
+    public void setUtilTime(java.util.Date utilTime) {
+        this.utilTime = utilTime;
+    }
+
+    public java.util.Date getUtilTimestamp() {
+        return utilTimestamp;
+    }
+
+    public void setUtilTimestamp(java.util.Date utilTimestamp) {
+        this.utilTimestamp = utilTimestamp;
+    }
+
+    public Calendar getCalendarDate() {
+        return calendarDate;
+    }
+
+    public void setCalendarDate(Calendar calendarDate) {
+        this.calendarDate = calendarDate;
+    }
+
+    public Calendar getCalendarTimestamp() {
+        return calendarTimestamp;
+    }
+
+    public void setCalendarTimestamp(Calendar calendarTimestamp) {
+        this.calendarTimestamp = calendarTimestamp;
+    }
+
+    public LocalDate getLocalDate() {
+        return localDate;
+    }
+
+    public void setLocalDate(LocalDate localDate) {
+        this.localDate = localDate;
+    }
+
+    public LocalTime getLocalTime() {
+        return localTime;
+    }
+
+    public void setLocalTime(LocalTime localTime) {
+        this.localTime = localTime;
+    }
+
+    public OffsetTime getOffsetTime() {
+        return offsetTime;
+    }
+
+    public void setOffsetTime(OffsetTime offsetTime) {
+        this.offsetTime = offsetTime;
+    }
+
+    public Instant getInstant() {
+        return instant;
+    }
+
+    public void setInstant(Instant instant) {
+        this.instant = instant;
+    }
+
+    public LocalDateTime getLocalDateTime() {
+        return localDateTime;
+    }
+
+    public void setLocalDateTime(LocalDateTime localDateTime) {
+        this.localDateTime = localDateTime;
+    }
+
+    public OffsetDateTime getOffsetDateTime() {
+        return offsetDateTime;
+    }
+
+    public void setOffsetDateTime(OffsetDateTime offsetDateTime) {
+        this.offsetDateTime = offsetDateTime;
+    }
+
+    public ZonedDateTime getZonedDateTime() {
+        return zonedDateTime;
+    }
+
+    public void setZonedDateTime(ZonedDateTime zonedDateTime) {
+        this.zonedDateTime = zonedDateTime;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/package-info.java

@@ -0,0 +1,9 @@
+@AnyMetaDef(name = "EntityDescriptionMetaDef", metaType = "string", idType = "int",
+        metaValues = {
+                @MetaValue(value = "Employee", targetEntity = Employee.class),
+                @MetaValue(value = "Phone", targetEntity = Phone.class)
+        })
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.AnyMetaDef;
+import org.hibernate.annotations.MetaValue;

hibernate5/src/test/java/com/baeldung/hibernate/DynamicMappingIntegrationTest.java

@@ -0,0 +1,164 @@
+package com.baeldung.hibernate;
+
+import com.baeldung.hibernate.pojo.Employee;
+import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.Phone;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class DynamicMappingIntegrationTest {
+
+    private Session session;
+
+    private Transaction transaction;
+
+    @Before
+    public void setUp() throws IOException {
+        session = HibernateUtil.getSessionFactory().openSession();
+        transaction = session.beginTransaction();
+
+        session.createNativeQuery("delete from phone").executeUpdate();
+        session.createNativeQuery("delete from employee").executeUpdate();
+
+        transaction.commit();
+        transaction = session.beginTransaction();
+    }
+
+    @After
+    public void tearDown() {
+        transaction.rollback();
+        session.close();
+    }
+
+    @Test
+    public void givenEntity_whenFieldMappedWithFormula_thenFieldIsCalculated() {
+        Employee employee = new Employee(10_000L, 25);
+        assertThat(employee.getTaxJavaWay()).isEqualTo(2_500L);
+
+        session.save(employee);
+        session.flush();
+        session.clear();
+
+        employee = session.get(Employee.class, employee.getId());
+        assertThat(employee.getTax()).isEqualTo(2_500L);
+    }
+
+    @Test
+    public void givenEntityMappedWithWhere_whenDeletedIsTrue_thenEntityNotFetched() {
+        Employee employee = new Employee();
+
+        session.save(employee);
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertThat(employee).isNotNull();
+
+        employee.setDeleted(true);
+        session.flush();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertThat(employee).isNotNull();
+
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertThat(employee).isNull();
+
+    }
+
+    @Test
+    public void givenCollectionMappedWithWhere_whenDeletedIsTrue_thenEntityNotFetched() {
+        Employee employee = new Employee();
+        Phone phone1 = new Phone("555-45-67");
+        Phone phone2 = new Phone("555-89-01");
+        employee.getPhones().add(phone1);
+        employee.getPhones().add(phone2);
+
+        session.save(phone1);
+        session.save(phone2);
+        session.save(employee);
+        session.flush();
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertThat(employee.getPhones()).hasSize(2);
+
+        employee.getPhones().iterator().next().setDeleted(true);
+        session.flush();
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertThat(employee.getPhones()).hasSize(1);
+
+        List<Phone> fullPhoneList = session.createQuery("from Phone").getResultList();
+        assertThat(fullPhoneList).hasSize(2);
+
+    }
+
+    @Test
+    public void givenFilterByIncome_whenIncomeLimitSet_thenFilterIsApplied() throws IOException {
+        session.save(new Employee(10_000, 25));
+        session.save(new Employee(12_000, 25));
+        session.save(new Employee(15_000, 25));
+
+        session.flush();
+        session.clear();
+
+        session.enableFilter("incomeLevelFilter")
+                .setParameter("incomeLimit", 11_000);
+
+        List<Employee> employees = session.createQuery("from Employee").getResultList();
+
+        assertThat(employees).hasSize(2);
+
+        Employee employee = session.get(Employee.class, 1);
+        assertThat(employee.getGrossIncome()).isEqualTo(10_000);
+
+        session.close();
+
+        session = HibernateUtil.getSessionFactory().openSession();
+        transaction = session.beginTransaction();
+
+        employees = session.createQuery("from Employee").getResultList();
+
+        assertThat(employees).hasSize(3);
+
+    }
+
+    @Test
+    public void givenMappingWithAny_whenDescriptionAddedToEntity_thenDescriptionCanReferAnyEntity() {
+        Employee employee = new Employee();
+        Phone phone1 = new Phone("555-45-67");
+        Phone phone2 = new Phone("555-89-01");
+        employee.getPhones().add(phone1);
+        employee.getPhones().add(phone2);
+
+        EntityDescription employeeDescription = new EntityDescription("Send to conference next year", employee);
+        EntityDescription phone1Description = new EntityDescription("Home phone (do not call after 10PM)", phone1);
+        EntityDescription phone2Description = new EntityDescription("Work phone", phone1);
+
+        session.save(phone1);
+        session.save(phone2);
+        session.save(employee);
+        session.save(employeeDescription);
+        session.save(phone1Description);
+        session.save(phone2Description);
+        session.flush();
+        session.clear();
+
+        List<EntityDescription> descriptions = session.createQuery("from EntityDescription").getResultList();
+
+        assertThat(Employee.class.isAssignableFrom(descriptions.get(0).getEntity().getClass())).isTrue();
+        assertThat(Phone.class.isAssignableFrom(descriptions.get(1).getEntity().getClass())).isTrue();
+        assertThat(Phone.class.isAssignableFrom(descriptions.get(2).getEntity().getClass())).isTrue();
+    }
+
+}

hibernate5/src/test/java/com/baeldung/hibernate/TemporalValuesTest.java

@@ -0,0 +1,126 @@
+package com.baeldung.hibernate;
+
+import com.baeldung.hibernate.pojo.TemporalValues;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.time.*;
+import java.util.Calendar;
+import java.util.TimeZone;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TemporalValuesTest {
+
+    private Session session;
+
+    private Transaction transaction;
+
+    @Before
+    public void setUp() throws IOException {
+        session = HibernateUtil.getSessionFactory().withOptions()
+                .jdbcTimeZone(TimeZone.getTimeZone("UTC"))
+                .openSession();
+        transaction = session.beginTransaction();
+        session.createNativeQuery("delete from temporalvalues").executeUpdate();
+    }
+
+    @After
+    public void tearDown() {
+        transaction.rollback();
+        session.close();
+    }
+
+    @Test
+    public void givenEntity_whenMappingSqlTypes_thenTemporalIsSelectedAutomatically() {
+        TemporalValues temporalValues = new TemporalValues();
+        temporalValues.setSqlDate(java.sql.Date.valueOf("2017-11-15"));
+        temporalValues.setSqlTime(java.sql.Time.valueOf("15:30:14"));
+        temporalValues.setSqlTimestamp(java.sql.Timestamp.valueOf("2017-11-15 15:30:14.332"));
+
+        session.save(temporalValues);
+        session.flush();
+        session.clear();
+
+        temporalValues = session.get(TemporalValues.class, temporalValues.getId());
+        assertThat(temporalValues.getSqlDate()).isEqualTo(java.sql.Date.valueOf("2017-11-15"));
+        assertThat(temporalValues.getSqlTime()).isEqualTo(java.sql.Time.valueOf("15:30:14"));
+        assertThat(temporalValues.getSqlTimestamp()).isEqualTo(java.sql.Timestamp.valueOf("2017-11-15 15:30:14.332"));
+
+    }
+
+    @Test
+    public void givenEntity_whenMappingUtilDateType_thenTemporalIsSpecifiedExplicitly() throws Exception {
+        TemporalValues temporalValues = new TemporalValues();
+        temporalValues.setUtilDate(new SimpleDateFormat("yyyy-MM-dd").parse("2017-11-15"));
+        temporalValues.setUtilTime(new SimpleDateFormat("HH:mm:ss").parse("15:30:14"));
+        temporalValues.setUtilTimestamp(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").parse("2017-11-15 15:30:14.332"));
+
+        session.save(temporalValues);
+        session.flush();
+        session.clear();
+
+        temporalValues = session.get(TemporalValues.class, temporalValues.getId());
+        assertThat(temporalValues.getUtilDate()).isEqualTo(new SimpleDateFormat("yyyy-MM-dd").parse("2017-11-15"));
+        assertThat(temporalValues.getUtilTime()).isEqualTo(new SimpleDateFormat("HH:mm:ss").parse("15:30:14"));
+        assertThat(temporalValues.getUtilTimestamp()).isEqualTo(java.sql.Timestamp.valueOf("2017-11-15 15:30:14.332"));
+
+    }
+
+    @Test
+    public void givenEntity_whenMappingCalendarType_thenTemporalIsSpecifiedExplicitly() throws Exception {
+        TemporalValues temporalValues = new TemporalValues();
+
+        Calendar calendarDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        calendarDate.set(Calendar.YEAR, 2017);
+        calendarDate.set(Calendar.MONTH, 10);
+        calendarDate.set(Calendar.DAY_OF_MONTH, 15);
+        temporalValues.setCalendarDate(calendarDate);
+
+        Calendar calendarTimestamp = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        calendarTimestamp.setTime(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").parse("2017-11-15 15:30:14.322"));
+        temporalValues.setCalendarTimestamp(calendarTimestamp);
+
+        session.save(temporalValues);
+        session.flush();
+        session.clear();
+
+        temporalValues = session.get(TemporalValues.class, temporalValues.getId());
+        assertThat(temporalValues.getCalendarDate().getTime()).isEqualTo(new SimpleDateFormat("yyyy-MM-dd").parse("2017-11-15"));
+        assertThat(temporalValues.getCalendarTimestamp().getTime()).isEqualTo(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").parse("2017-11-15 15:30:14.322"));
+
+    }
+
+    @Test
+    public void givenEntity_whenMappingJavaTimeTypes_thenTemporalIsSelectedAutomatically() {
+        TemporalValues temporalValues = new TemporalValues();
+
+        temporalValues.setLocalDate(LocalDate.parse("2017-11-15"));
+        temporalValues.setLocalTime(LocalTime.parse("15:30:18"));
+        temporalValues.setOffsetTime(OffsetTime.parse("08:22:12+01:00"));
+        temporalValues.setInstant(Instant.parse("2017-11-15T08:22:12Z"));
+        temporalValues.setLocalDateTime(LocalDateTime.parse("2017-11-15T08:22:12"));
+        temporalValues.setOffsetDateTime(OffsetDateTime.parse("2017-11-15T08:22:12+01:00"));
+        temporalValues.setZonedDateTime(ZonedDateTime.parse("2017-11-15T08:22:12+01:00[Europe/Paris]"));
+
+        session.save(temporalValues);
+        session.flush();
+        session.clear();
+
+        temporalValues = session.get(TemporalValues.class, temporalValues.getId());
+        assertThat(temporalValues.getLocalDate()).isEqualTo(LocalDate.parse("2017-11-15"));
+        assertThat(temporalValues.getLocalTime()).isEqualTo(LocalTime.parse("15:30:18"));
+        assertThat(temporalValues.getOffsetTime()).isEqualTo(OffsetTime.parse("08:22:12+01:00"));
+        assertThat(temporalValues.getInstant()).isEqualTo(Instant.parse("2017-11-15T08:22:12Z"));
+        assertThat(temporalValues.getLocalDateTime()).isEqualTo(LocalDateTime.parse("2017-11-15T08:22:12"));
+        assertThat(temporalValues.getOffsetDateTime()).isEqualTo(OffsetDateTime.parse("2017-11-15T08:22:12+01:00"));
+        assertThat(temporalValues.getZonedDateTime()).isEqualTo(ZonedDateTime.parse("2017-11-15T08:22:12+01:00[Europe/Paris]"));
+
+    }
+
+}

hibernate5/src/test/resources/hibernate-multitenancy.properties

@@ -0,0 +1,9 @@
+hibernate.connection.driver_class=org.h2.Driver
+hibernate.connection.url=jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1
+hibernate.connection.username=sa
+hibernate.connection.autocommit=true
+jdbc.password=
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.multiTenancy=DATABASE

hibernate5/src/test/resources/hibernate.properties

@@ -6,4 +6,4 @@ jdbc.password=
 
 hibernate.dialect=org.hibernate.dialect.H2Dialect
 hibernate.show_sql=true
-hibernate.multiTenancy=DATABASE
+hibernate.hbm2ddl.auto=create-drop

jackson/README.md

@@ -35,3 +35,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Jackson – Unmarshall to Collection/Array](http://www.baeldung.com/jackson-collection-array)
 - [Jackson – Change Name of Field](http://www.baeldung.com/jackson-name-of-property)
 - [Serialize Only Fields that meet a Custom Criteria with Jackson](http://www.baeldung.com/jackson-serialize-field-custom-criteria)
+- [Mapping Nested Values with Jackson](http://www.baeldung.com/jackson-nested-values)

junit5/README.md

@@ -6,4 +6,4 @@
 - [Guide to Dynamic Tests in Junit 5](http://www.baeldung.com/junit5-dynamic-tests)
 - [A Guied to JUnit 5 Extensions](http://www.baeldung.com/junit-5-extensions)
 - [Inject Parameters into JUnit Jupiter Unit Tests](http://www.baeldung.com/junit-5-parameters)
-
+- [Mockito and JUnit 5 – Using ExtendWith](http://www.baeldung.com/mockito-junit-5-extension)

junit5/pom.xml

@@ -19,15 +19,17 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
-        <junit.jupiter.version>5.0.0-RC2</junit.jupiter.version>
-        <junit.platform.version>1.0.0-RC2</junit.platform.version>
-        <junit.vintage.version>4.12.0-RC2</junit.vintage.version>
+        <junit.jupiter.version>5.0.1</junit.jupiter.version>
+        <junit.platform.version>1.0.1</junit.platform.version>
+        <junit.vintage.version>4.12.1</junit.vintage.version>
         <log4j2.version>2.8.2</log4j2.version>
         <h2.version>1.4.196</h2.version>
+        <mockito.version>2.11.0</mockito.version>
 
         <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <junit4.version>4.12</junit4.version>
+        <spring.version>5.0.1.RELEASE</spring.version>
     </properties>
 
     <build>
@@ -110,6 +112,17 @@
             <version>${junit4.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+            <version>${spring.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
         
     </dependencies>
   

junit5/src/main/java/com/baeldung/junit5/Greetings.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5;
+
+public class Greetings {
+
+    public static String sayHello() {
+        return "Hello";
+    }
+
+}

junit5/src/main/java/com/baeldung/junit5/mockito/User.java

@@ -0,0 +1,41 @@
+package com.baeldung.junit5.mockito;
+
+public class User {
+    
+    private Integer id;
+    private String name;
+    private int age;
+    
+    public User() {
+    }
+    
+    public User(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    
+    public Integer getId() {
+        return id;
+    }
+    public void setId(Integer id) {
+        this.id = id;
+    }
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+    public int getAge() {
+        return age;
+    }
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
+    }
+
+}

junit5/src/main/java/com/baeldung/junit5/mockito/repository/MailClient.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.repository;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface MailClient {
+
+    void sendUserRegistrationMail(User user);
+    
+}

junit5/src/main/java/com/baeldung/junit5/mockito/repository/SettingRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.repository;
+
+public interface SettingRepository {
+    
+    int getUserMinAge();
+
+    int getUserNameMinLength();
+
+}

junit5/src/main/java/com/baeldung/junit5/mockito/repository/UserRepository.java

@@ -0,0 +1,10 @@
+package com.baeldung.junit5.mockito.repository;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface UserRepository {
+
+    User insert(User user);
+    boolean isUsernameAlreadyExists(String userName);
+    
+}

junit5/src/main/java/com/baeldung/junit5/mockito/service/DefaultUserService.java

@@ -0,0 +1,46 @@
+package com.baeldung.junit5.mockito.service;
+
+import com.baeldung.junit5.mockito.User;
+import com.baeldung.junit5.mockito.repository.MailClient;
+import com.baeldung.junit5.mockito.repository.SettingRepository;
+import com.baeldung.junit5.mockito.repository.UserRepository;
+
+public class DefaultUserService implements UserService {
+    
+    private UserRepository userRepository;
+    private SettingRepository settingRepository;
+    private MailClient mailClient;
+    
+    public DefaultUserService(UserRepository userRepository, SettingRepository settingRepository, MailClient mailClient) {
+        this.userRepository = userRepository;
+        this.settingRepository = settingRepository;
+        this.mailClient = mailClient;
+    }
+
+    @Override
+    public User register(User user) {
+        validate(user);
+        User insertedUser = userRepository.insert(user);
+        mailClient.sendUserRegistrationMail(insertedUser);
+        return insertedUser;
+    }
+
+    private void validate(User user) {
+        if(user.getName() == null) {
+            throw new RuntimeException(Errors.USER_NAME_REQUIRED);
+        }
+
+        if(user.getName().length() < settingRepository.getUserNameMinLength()) {
+            throw new RuntimeException(Errors.USER_NAME_SHORT);
+        }
+        
+        if(user.getAge() < settingRepository.getUserMinAge()) {
+            throw new RuntimeException(Errors.USER_AGE_YOUNG);
+        }
+        
+        if(userRepository.isUsernameAlreadyExists(user.getName())) {
+            throw new RuntimeException(Errors.USER_NAME_DUPLICATE);
+        }
+    }
+
+}

junit5/src/main/java/com/baeldung/junit5/mockito/service/Errors.java

@@ -0,0 +1,10 @@
+package com.baeldung.junit5.mockito.service;
+
+public class Errors {
+
+    public static final String USER_NAME_REQUIRED = "user.name.required";
+    public static final String USER_NAME_SHORT = "user.name.short";
+    public static final String USER_AGE_YOUNG = "user.age.young";
+    public static final String USER_NAME_DUPLICATE = "user.name.duplicate";
+    
+}

junit5/src/main/java/com/baeldung/junit5/mockito/service/UserService.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.service;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface UserService {
+    
+    User register(User user);
+
+}

junit5/src/test/java/com/baeldung/GreetingsTest.java

@@ -0,0 +1,19 @@
+package com.baeldung;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+
+import com.baeldung.junit5.Greetings;
+
+@RunWith(JUnitPlatform.class)
+public class GreetingsTest {
+
+    @Test
+    void whenCallingSayHello_thenReturnHello() {
+        assertTrue("Hello".equals(Greetings.sayHello()));
+    }
+
+}

junit5/src/test/java/com/baeldung/junit5/mockito/MockitoExtension.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2015-2016 the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v1.0 which
+ * accompanies this distribution and is available at
+ *
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package com.baeldung.junit5.mockito;
+
+import static org.mockito.Mockito.mock;
+
+import java.lang.reflect.Parameter;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
+import org.junit.jupiter.api.extension.ExtensionContext.Store;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolver;
+import org.junit.jupiter.api.extension.TestInstancePostProcessor;
+import org.mockito.MockitoAnnotations;
+import org.mockito.Mock;
+
+/**
+ * {@code MockitoExtension} showcases the {@link TestInstancePostProcessor}
+ * and {@link ParameterResolver} extension APIs of JUnit 5 by providing
+ * dependency injection support at the field level and at the method parameter
+ * level via Mockito 2.x's {@link Mock @Mock} annotation.
+ *
+ * @since 5.0
+ */
+public class MockitoExtension implements TestInstancePostProcessor, ParameterResolver {
+
+    @Override
+    public void postProcessTestInstance(Object testInstance, ExtensionContext context) {
+        MockitoAnnotations.initMocks(testInstance);
+    }
+
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
+        return parameterContext.getParameter().isAnnotationPresent(Mock.class);
+    }
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
+        return getMock(parameterContext.getParameter(), extensionContext);
+    }
+
+    private Object getMock(Parameter parameter, ExtensionContext extensionContext) {
+        Class<?> mockType = parameter.getType();
+        Store mocks = extensionContext.getStore(Namespace.create(MockitoExtension.class, mockType));
+        String mockName = getMockName(parameter);
+
+        if (mockName != null) {
+            return mocks.getOrComputeIfAbsent(mockName, key -> mock(mockType, mockName));
+        }
+        else {
+            return mocks.getOrComputeIfAbsent(mockType.getCanonicalName(), key -> mock(mockType));
+        }
+    }
+
+    private String getMockName(Parameter parameter) {
+        String explicitMockName = parameter.getAnnotation(Mock.class).name().trim();
+        if (!explicitMockName.isEmpty()) {
+            return explicitMockName;
+        }
+        else if (parameter.isNamePresent()) {
+            return parameter.getName();
+        }
+        return null;
+    }
+
+}

junit5/src/test/java/com/baeldung/junit5/mockito/UserServiceUnitTest.java

@@ -0,0 +1,122 @@
+package com.baeldung.junit5.mockito;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import com.baeldung.junit5.mockito.repository.MailClient;
+import com.baeldung.junit5.mockito.repository.SettingRepository;
+import com.baeldung.junit5.mockito.repository.UserRepository;
+import com.baeldung.junit5.mockito.service.DefaultUserService;
+import com.baeldung.junit5.mockito.service.Errors;
+import com.baeldung.junit5.mockito.service.UserService;
+
+@RunWith(JUnitPlatform.class)
+@ExtendWith(MockitoExtension.class)
+public class UserServiceUnitTest {
+    
+    UserService userService;
+    @Mock UserRepository userRepository;
+    
+    User user;
+    
+    @BeforeEach
+    void init(@Mock SettingRepository settingRepository, @Mock MailClient mailClient) {
+        userService = new DefaultUserService(userRepository, settingRepository, mailClient);
+        when(settingRepository.getUserMinAge()).thenReturn(10);
+        when(settingRepository.getUserNameMinLength()).thenReturn(4);
+        when(userRepository.isUsernameAlreadyExists(any(String.class))).thenReturn(false);
+    }
+    
+    @Test
+    void givenValidUser_whenSaveUser_thenSucceed(@Mock MailClient mailClient) {
+        // Given
+        user = new User("Jerry", 12);
+        when(userRepository.insert(any(User.class))).then(new Answer<User>() {
+            int sequence = 1;
+            
+            @Override
+            public User answer(InvocationOnMock invocation) throws Throwable {
+                User user = (User) invocation.getArgument(0);
+                user.setId(sequence++);
+                return user;
+            }
+        });
+        
+        // When
+        User insertedUser = userService.register(user);
+        
+        // Then
+        verify(userRepository).insert(user);
+        Assertions.assertNotNull(user.getId());
+        verify(mailClient).sendUserRegistrationMail(insertedUser);
+    }
+
+    @Test
+    void givenShortName_whenSaveUser_thenGiveShortUsernameError() {
+        // Given
+        user = new User("tom", 12);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_NAME_SHORT);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+    @Test
+    void givenSmallAge_whenSaveUser_thenGiveYoungUserError() {
+        // Given
+        user = new User("jerry", 3);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_AGE_YOUNG);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+    @Test
+    void givenUserWithExistingName_whenSaveUser_thenGiveUsernameAlreadyExistsError() {
+        // Given
+        user = new User("jerry", 12);
+        Mockito.reset(userRepository);
+        when(userRepository.isUsernameAlreadyExists(any(String.class))).thenReturn(true);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_NAME_DUPLICATE);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+}

junit5/src/test/java/com/baeldung/junit5/spring/GreetingsSpringTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.junit5.spring;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import com.baeldung.junit5.Greetings;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = { SpringTestConfiguration.class })
+public class GreetingsSpringTest {
+
+    @Test
+    void whenCallingSayHello_thenReturnHello() {
+        assertTrue("Hello".equals(Greetings.sayHello()));
+    }
+
+}