Merge pull request #39 from eugenp/master

update

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

@@ -11,5 +11,5 @@ This module contains articles about core Java input and output (IO)
 - [List Files in a Directory in Java](https://www.baeldung.com/java-list-directory-files)
 - [Java – Append Data to a File](https://www.baeldung.com/java-append-to-file)
 - [How to Copy a File with Java](https://www.baeldung.com/java-copy-file)
-- [Create a Directory in Java](https://www.baeldung.com/java-create-directory)
+- [Create a Directory in Java](https://www.baeldung.com/java-create-directory) 
 - [[<-- Prev]](/core-java-modules/core-java-io)

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

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

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

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

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

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

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

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

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

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

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

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

core-scala/README.md

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

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

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

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

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

java-numbers-3/pom.xml

@@ -12,15 +12,32 @@
         <version>0.0.1-SNAPSHOT</version>
         <relativePath>../parent-java</relativePath>
     </parent>
-    
+
     <dependencies>
-    	<dependency>
+        <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>dsiutils</artifactId>
             <version>${dsiutils.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.vavr</groupId>
+            <artifactId>vavr</artifactId>
+            <version>${vavr.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
-   
+
     <build>
         <finalName>java-numbers-3</finalName>
         <resources>
@@ -33,6 +50,9 @@
 
     <properties>
         <dsiutils.version>2.6.0</dsiutils.version>
+        <vavr.version>0.10.2</vavr.version>
+        <commons.version>3.9</commons.version>
+        <assertj.version>3.6.1</assertj.version>
     </properties>
 
 </project>

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

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

lombok-custom/pom.xml

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

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

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

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

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

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

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

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

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

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

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

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

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

play-framework/async-http/.gitignore

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

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

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

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

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

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

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

play-framework/async-http/build.sbt

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

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

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