Merge branch 'master' of https://github.com/eugenp/tutorials

animal-sniffer-mvn-plugin/README.md

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

apache-cayenne/README.md

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

asm/README.md

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

asm/src/main/java/com/baeldung/examples/asm/instrumentation/Premain.java

@@ -1,19 +1,32 @@
 package com.baeldung.examples.asm.instrumentation;
 
 import com.baeldung.examples.asm.CustomClassWriter;
-
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.instrument.IllegalClassFormatException;
 import java.lang.instrument.Instrumentation;
+import java.security.ProtectionDomain;
 
+/**
+ *
+ * @author baeldung
+ */
 public class Premain {
 
     public static void premain(String agentArgs, Instrumentation inst) {
-        inst.addTransformer((l, name, c, d, b) -> {
+        inst.addTransformer(new ClassFileTransformer() {
 
-            if (name.equals("java/lang/Integer")) {
+            @Override
-                CustomClassWriter cr = new CustomClassWriter(b);
+            public byte[] transform(ClassLoader l, String name, Class c,
-                return cr.addField();
+                    ProtectionDomain d, byte[] b)
+                    throws IllegalClassFormatException {
+
+                if (name.equals("java/lang/Integer")) {
+                    CustomClassWriter cr = new CustomClassWriter(b);
+                    return cr.addField();
+                }
+                return b;
             }
-            return b;
         });
     }
+
 }

atomix/README.md

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

cas-secured-app/README.md

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

core-java/src/main/java/com/baeldung/staticdemo/Car.java

@@ -0,0 +1,48 @@
+package com.baeldung.staticdemo;
+
+/**
+ * This class demonstrates the use of static fields and static methods
+ * the instance variables engine and displacement are distinct for 
+ * each and every object whereas static/class variable numberOfCars
+ * is unique and is shared across all objects of this class.
+ * 
+ * @author baeldung
+ *
+ */
+public class Car {
+    private String name;
+    private String engine;
+    
+    public static int numberOfCars;
+    
+    public Car(String name, String engine) {
+        this.name = name;
+        this.engine = engine;
+        numberOfCars++;
+    }
+
+    //getters and setters
+    public static int getNumberOfCars() {
+        return numberOfCars;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEngine() {
+        return engine;
+    }
+
+    public void setEngine(String engine) {
+        this.engine = engine;
+    }
+
+    public static void setNumberOfCars(int numberOfCars) {
+        Car.numberOfCars = numberOfCars;
+    }
+}

core-java/src/main/java/com/baeldung/staticdemo/Singleton.java

@@ -0,0 +1,13 @@
+package com.baeldung.staticdemo;
+
+public class Singleton  {    
+    private Singleton() {}
+    
+    private static class SingletonHolder {    
+        public static final Singleton instance = new Singleton();
+    }    
+
+    public static Singleton getInstance() {    
+        return SingletonHolder.instance;    
+    }    
+}

core-java/src/main/java/com/baeldung/staticdemo/StaticBlock.java

@@ -0,0 +1,28 @@
+package com.baeldung.staticdemo;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class StaticBlock {
+    private static List<String> ranks = new LinkedList<>();
+
+    static {
+        ranks.add("Lieutenant");
+        ranks.add("Captain");
+        ranks.add("Major");
+    }
+    
+    static {
+        ranks.add("Colonel");
+        ranks.add("General");
+    }
+
+    //getters and setters
+    public static List<String> getRanks() {
+        return ranks;
+    }
+
+    public static void setRanks(List<String> ranks) {
+        StaticBlock.ranks = ranks;
+    }
+}

core-java/src/test/java/com/baeldung/staticdemo/CarIntegrationTest.java

@@ -0,0 +1,14 @@
+package com.baeldung.staticdemo;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class CarIntegrationTest {
+    @Test
+    public void whenNumberOfCarObjectsInitialized_thenStaticCounterIncreases() {
+        new Car("Jaguar", "V8");
+        new Car("Bugatti", "W16");
+        assertEquals(2, Car.numberOfCars);
+    }
+}

core-java/src/test/java/com/baeldung/staticdemo/SingletonIntegrationTest.java

@@ -0,0 +1,15 @@
+package com.baeldung.staticdemo;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class SingletonIntegrationTest {
+
+    @Test
+    public void givenStaticInnerClass_whenMultipleTimesInstanceCalled_thenOnlyOneTimeInitialized() {
+        Singleton object1 = Singleton.getInstance();
+        Singleton object2 = Singleton.getInstance();
+        
+        Assert.assertSame(object1, object2);
+    }
+}

core-java/src/test/java/com/baeldung/staticdemo/StaticBlockIntegrationTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.staticdemo;
+
+import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
+import static org.junit.Assert.assertThat;
+
+import java.util.List;
+
+import org.junit.Test;
+
+public class StaticBlockIntegrationTest {
+
+    @Test
+    public void whenAddedListElementsThroughStaticBlock_thenEnsureCorrectOrder() {
+        List<String> actualList = StaticBlock.getRanks();
+        assertThat(actualList, contains("Lieutenant", "Captain", "Major", "Colonel", "General"));
+    }
+}

deltaspike/README.md

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

drools/backward-chaining/pom.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>drools-backward-chaining</artifactId>
+	<version>1.0</version>
+	<name>drools-backward-chaining</name>
+
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parent-modules</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+
+	<properties>
+		<runtime.version>6.4.0.Final</runtime.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.kie</groupId>
+			<artifactId>kie-api</artifactId>
+			<version>${runtime.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.drools</groupId>
+			<artifactId>drools-core</artifactId>
+			<version>${runtime.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.drools</groupId>
+			<artifactId>drools-decisiontables</artifactId>
+			<version>${runtime.version}</version>
+		</dependency>
+	</dependencies>
+</project>

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

@@ -0,0 +1,28 @@
+package com.baeldung;
+
+import org.kie.api.KieServices;
+import org.kie.api.runtime.KieContainer;
+import org.kie.api.runtime.KieSession;
+
+import com.baeldung.model.Beatle;
+
+public class BackwardChainingBeatles {
+    public static void main(String[] args) {
+        
+            KieServices ks = KieServices.Factory.get();
+            KieContainer kContainer = ks.getKieClasspathContainer();
+            KieSession kSession = kContainer.newKieSession("ksession-backward-chaining");
+            // drools session base on the xml configuration (<strong>kmodule.xml</strong>)
+
+            // graph population
+            kSession.insert(new Beatle("Starr", "drums"));
+            kSession.insert(new Beatle("McCartney", "bass"));
+            kSession.insert(new Beatle("Lennon", "guitar"));
+            kSession.insert(new Beatle("Harrison", "guitar"));
+
+            kSession.insert("Ringo"); // invoke the rule that calls the query implentation of backward chaining
+            kSession.fireAllRules(); // invoke all the rules
+        
+    }
+
+}

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

@@ -0,0 +1,33 @@
+package com.baeldung.model;
+
+import org.kie.api.definition.type.Position;
+
+public class Beatle {
+
+    @Position(0)
+    private String lastName;
+    @Position(1)
+    private String instrument;
+
+    public Beatle(String lastName, String instrument) {
+        this.lastName = lastName;
+        this.instrument = instrument;
+    }
+
+    public String getInstrument() {
+        return instrument;
+    }
+
+    public void setInstrument(String instrument) {
+        this.instrument = instrument;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+}

drools/backward-chaining/src/main/resources/META-INF/kmodule.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule">
+    <kbase name="backward_chaining" packages="backward_chaining">
+        <ksession name="ksession-backward-chaining"/>
+    </kbase>
+</kmodule>

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

@@ -0,0 +1,44 @@
+package com.baeldung
+
+import com.baeldung.model.Beatle;
+
+
+query whichBeatle(String lastName, String instrument) 
+  Beatle(lastName, instrument;)
+  or 
+  (Beatle(lastName, null;) 
+    and 
+   whichBeatle(null, instrument;)) //recursive call to the function that allows to search in a derivation tree structure
+end
+
+rule "Ringo"
+  when
+    String(this == "Ringo")
+    whichBeatle("Starr", "drums";)
+  then
+    System.out.println("The beatle is Ringo Starr");
+end
+
+rule "Paul"
+  when
+    String(this == "Paul")
+    whichBeatle("McCartney", "bass";)
+  then
+    System.out.println("The beatle is Paul McCartney");
+end
+
+rule "John"
+  when
+    String(this == "John")
+    whichBeatle("Lennon", "guitar";)
+  then
+    System.out.println("The beatle is John Lennon");
+end
+
+rule "George"
+  when
+    String(this == "George")
+    whichBeatle("Harrison", "guitar";)
+  then
+    System.out.println("The beatle is George Harrison");
+end

eclipse/README.md

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

enterprise-patterns/README.md

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

events/README.md

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

gradle/README.md

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

graphql/graphql-java/README.md

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

guest/README.md

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

guest/spring-mvc/pom.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.forketyfork.guest</groupId>
+    <artifactId>spring-mvc</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>spring-mvc</name>
+    <description>Spring MVC sample project</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.0.M5</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+    </dependencies>
+
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+</project>

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

@@ -0,0 +1,15 @@
+package com.forketyfork.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"})
+public class Spring5Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Spring5Application.class, args);
+    }
+
+}

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

@@ -0,0 +1,27 @@
+package com.forketyfork.guest.springmvc.model;
+
+public class LoginData {
+
+    private String login;
+
+    private String password;
+
+    public LoginData() {
+    }
+
+    public String getLogin() {
+        return login;
+    }
+
+    public void setLogin(String login) {
+        this.login = login;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

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

@@ -0,0 +1,31 @@
+package com.forketyfork.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.servlet.ModelAndView;
+
+import java.util.Collections;
+
+@Controller
+public class InternalsController {
+
+    private static final String LOGIN = "jack";
+    private static final String PASSWORD = "halloween";
+
+    @GetMapping("/")
+    public String hello() {
+        return "login";
+    }
+
+    @PostMapping("/login")
+    public ModelAndView login(LoginData loginData) {
+        if (LOGIN.equals(loginData.getLogin()) && PASSWORD.equals(loginData.getPassword())) {
+            return new ModelAndView("success", Collections.singletonMap("login", loginData.getLogin()));
+        } else {
+            return new ModelAndView("failure", Collections.singletonMap("login", loginData.getLogin()));
+        }
+    }
+
+}

guest/spring-mvc/src/main/resources/templates/failure.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Login Failure</title>
+</head>
+<p>
+    User with login <span th:text="${login}"></span> not found, please <a href="/">try again</a>.
+</p>
+</html>

guest/spring-mvc/src/main/resources/templates/login.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head><title>Login Form</title></head>
+<body>
+
+<form method="post" action="/login">
+    <input type="text" placeholder="Login" name="login"/>
+    <input type="password" placeholder="Password" name="password"/>
+    <button type="submit">Submit</button>
+</form>
+
+</body>
+</html>

guest/spring-mvc/src/main/resources/templates/success.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:th="http://www.thymeleaf.org">
+<head>
+    <title>Login Success</title>
+</head>
+<p>
+    Hello, <span th:text="${login}"></span>!
+</p>
+</html>

hibernate5/README.md

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

hystrix/pom.xml

@@ -2,7 +2,6 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
     <artifactId>hystrix</artifactId>
     <version>1.0</version>
     <name>hystrix</name>

hystrix/src/test/java/com/baeldung/hystrix/HystrixTimeoutManualTest.java

@@ -10,53 +10,53 @@ import org.junit.Test;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.equalTo;
 
-public class HystrixTimeoutIntegrationTest {
+public class HystrixTimeoutManualTest {
 
     @Test
-    public void givenInputBobAndDefaultSettings_whenCommandExecuted_thenReturnHelloBob(){
+    public void givenInputBobAndDefaultSettings_whenCommandExecuted_thenReturnHelloBob() {
         assertThat(new CommandHelloWorld("Bob").execute(), equalTo("Hello Bob!"));
     }
 
     @Test
     public void givenSvcTimeoutOf100AndDefaultSettings_whenRemoteSvcExecuted_thenReturnSuccess()
-            throws InterruptedException {
+      throws InterruptedException {
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroup2"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroup2"));
 
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(100)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
     }
 
     @Test(expected = HystrixRuntimeException.class)
     public void givenSvcTimeoutOf10000AndDefaultSettings__whenRemoteSvcExecuted_thenExpectHRE() throws InterruptedException {
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest3"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest3"));
         new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(10_000)).execute();
     }
 
     @Test
     public void givenSvcTimeoutOf5000AndExecTimeoutOf10000_whenRemoteSvcExecuted_thenReturnSuccess()
-            throws InterruptedException {
+      throws InterruptedException {
 
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest4"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest4"));
         HystrixCommandProperties.Setter commandProperties = HystrixCommandProperties.Setter();
         commandProperties.withExecutionTimeoutInMilliseconds(10_000);
         config.andCommandPropertiesDefaults(commandProperties);
 
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(500)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
     }
 
     @Test(expected = HystrixRuntimeException.class)
     public void givenSvcTimeoutOf15000AndExecTimeoutOf5000__whenExecuted_thenExpectHRE()
-            throws InterruptedException {
+      throws InterruptedException {
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest5"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupTest5"));
         HystrixCommandProperties.Setter commandProperties = HystrixCommandProperties.Setter();
         commandProperties.withExecutionTimeoutInMilliseconds(5_000);
         config.andCommandPropertiesDefaults(commandProperties);
@@ -65,45 +65,45 @@ public class HystrixTimeoutIntegrationTest {
 
     @Test
     public void givenSvcTimeoutOf500AndExecTimeoutOf10000AndThreadPool__whenExecuted_thenReturnSuccess()
-            throws InterruptedException {
+      throws InterruptedException {
 
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupThreadPool"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupThreadPool"));
         HystrixCommandProperties.Setter commandProperties = HystrixCommandProperties.Setter();
         commandProperties.withExecutionTimeoutInMilliseconds(10_000);
         config.andCommandPropertiesDefaults(commandProperties);
         config.andThreadPoolPropertiesDefaults(HystrixThreadPoolProperties.Setter()
-                .withMaxQueueSize(10)
+          .withMaxQueueSize(10)
-                .withCoreSize(3)
+          .withCoreSize(3)
-                .withQueueSizeRejectionThreshold(10));
+          .withQueueSizeRejectionThreshold(10));
 
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(500)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
     }
 
     @Test
     public void givenCircuitBreakerSetup__whenRemoteSvcCmdExecuted_thenReturnSuccess()
-            throws InterruptedException {
+      throws InterruptedException {
 
         HystrixCommand.Setter config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupCircuitBreaker"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroupCircuitBreaker"));
         HystrixCommandProperties.Setter properties = HystrixCommandProperties.Setter();
         properties.withExecutionTimeoutInMilliseconds(1000);
 
         properties.withCircuitBreakerSleepWindowInMilliseconds(4000);
         properties.withExecutionIsolationStrategy(
-                HystrixCommandProperties.ExecutionIsolationStrategy.THREAD);
+          HystrixCommandProperties.ExecutionIsolationStrategy.THREAD);
         properties.withCircuitBreakerEnabled(true);
         properties.withCircuitBreakerRequestVolumeThreshold(1);
 
         config.andCommandPropertiesDefaults(properties);
 
         config.andThreadPoolPropertiesDefaults(HystrixThreadPoolProperties.Setter()
-                .withMaxQueueSize(1)
+          .withMaxQueueSize(1)
-                .withCoreSize(1)
+          .withCoreSize(1)
-                .withQueueSizeRejectionThreshold(1));
+          .withQueueSizeRejectionThreshold(1));
 
         assertThat(this.invokeRemoteService(config, 10_000), equalTo(null));
         assertThat(this.invokeRemoteService(config, 10_000), equalTo(null));
@@ -111,19 +111,19 @@ public class HystrixTimeoutIntegrationTest {
         Thread.sleep(5000);
 
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(500)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(500)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
         assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(500)).execute(),
-                equalTo("Success"));
+          equalTo("Success"));
     }
 
     public String invokeRemoteService(HystrixCommand.Setter config, int timeout)
-            throws InterruptedException {
+      throws InterruptedException {
         String response = null;
         try {
             response = new RemoteServiceTestCommand(config,
-                    new RemoteServiceTestSimulator(timeout)).execute();
+              new RemoteServiceTestSimulator(timeout)).execute();
         } catch (HystrixRuntimeException ex) {
             System.out.println("ex = " + ex);
         }

intelliJ/README.md

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

jhipster/README.md

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

jmh/README.md

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

jooby/README.md

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

json-path/README.md

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

linkrest/README.md

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

metrics/pom.xml

@@ -16,7 +16,7 @@
         <dep.ver.metrics>3.1.2</dep.ver.metrics>
         <dep.ver.servlet>3.1.0</dep.ver.servlet>
         <netflix.servo.ver>0.12.17</netflix.servo.ver>
-        <micrometer.ver>1.0.0-rc.2</micrometer.ver>
+        <micrometer.ver>0.12.0.RELEASE</micrometer.ver>
         <spring.boot.ver>2.0.0.M5</spring.boot.ver>
     </properties>
 

metrics/src/test/java/com/baeldung/metrics/micrometer/MicrometerAtlasTest.java

@@ -16,6 +16,7 @@ import java.util.*;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 
+import static io.micrometer.core.instrument.Meter.Type;
 import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.collection.IsMapContaining.hasEntry;
 import static org.hamcrest.core.IsCollectionContaining.hasItems;
@@ -27,7 +28,7 @@ import static org.junit.Assert.assertTrue;
  */
 public class MicrometerAtlasTest {
 
-    AtlasConfig atlasConfig;
+    private AtlasConfig atlasConfig;
 
     @Before
     public void init() {
@@ -208,32 +209,27 @@ public class MicrometerAtlasTest {
         timer.record(8, TimeUnit.SECONDS);
         timer.record(13, TimeUnit.SECONDS);
 
-        List<Gauge> quantileGauges = registry
+        Map<String, Integer> quantileMap = extractTagValueMap(registry, Type.Gauge, 1e9);
+        assertThat(quantileMap, allOf(hasEntry("quantile=0.3", 2), hasEntry("quantile=0.5", 3), hasEntry("quantile=0.95", 8)));
+    }
+
+    private Map<String, Integer> extractTagValueMap(MeterRegistry registry, Type meterType, double valueDivisor) {
+        return registry
           .getMeters()
           .stream()
-          .filter(meter -> meter
+          .filter(meter -> meter.getType() == meterType)
-            .getType()
+          .collect(Collectors.toMap(meter -> {
-            .name()
+              Tag tag = meter
-            .equals("Gauge"))
-          .map(meter -> (Gauge) meter)
-          .collect(Collectors.toList());
-        assert (3 == quantileGauges.size());
-
-        Map<String, Integer> quantileMap = quantileGauges
-          .stream()
-          .collect(Collectors.toMap(gauge -> {
-              Tag tag = gauge
                 .getId()
                 .getTags()
                 .iterator()
                 .next();
               return tag.getKey() + "=" + tag.getValue();
-          }, gauge -> (int) (gauge.value() / 1e9)));
+          }, meter -> (int) (meter
-
+            .measure()
-        assertThat(quantileMap.keySet(), hasItems("quantile=0.3", "quantile=0.5", "quantile=0.95"));
+            .iterator()
-        assertThat(quantileMap.get("quantile=0.3"), is(2));
+            .next()
-        assertThat(quantileMap.get("quantile=0.5"), is(3));
+            .getValue() / valueDivisor)));
-        assertThat(quantileMap.get("quantile=0.95"), is(8));
     }
 
     @Test
@@ -243,6 +239,7 @@ public class MicrometerAtlasTest {
           .builder("summary")
           .histogram(Histogram.linear(0, 10, 5))
           .register(registry);
+
         hist.record(3);
         hist.record(8);
         hist.record(20);
@@ -250,22 +247,7 @@ public class MicrometerAtlasTest {
         hist.record(13);
         hist.record(26);
 
-        Map<String, Integer> histograms = registry
+        Map<String, Integer> histograms = extractTagValueMap(registry, Type.Counter, 1.0);
-          .getMeters()
-          .stream()
-          .filter(meter -> meter.getType() == Meter.Type.Counter)
-          .collect(Collectors.toMap(counter -> {
-              Tag tag = counter
-                .getId()
-                .getTags()
-                .iterator()
-                .next();
-              return tag.getKey() + "=" + tag.getValue();
-          }, counter -> (int) counter
-            .measure()
-            .iterator()
-            .next()
-            .getValue()));
 
         assertThat(histograms, allOf(hasEntry("bucket=0.0", 0), hasEntry("bucket=10.0", 2), hasEntry("bucket=20.0", 2), hasEntry("bucket=30.0", 1), hasEntry("bucket=40.0", 1), hasEntry("bucket=Infinity", 0)));
     }
@@ -284,22 +266,7 @@ public class MicrometerAtlasTest {
         timer.record(341, TimeUnit.MILLISECONDS);
         timer.record(500, TimeUnit.MILLISECONDS);
 
-        Map<String, Integer> histograms = registry
+        Map<String, Integer> histograms = extractTagValueMap(registry, Type.Counter, 1.0);
-          .getMeters()
-          .stream()
-          .filter(meter -> meter.getType() == Meter.Type.Counter)
-          .collect(Collectors.toMap(counter -> {
-              Tag tag = counter
-                .getId()
-                .getTags()
-                .iterator()
-                .next();
-              return tag.getKey() + "=" + tag.getValue();
-          }, counter -> (int) counter
-            .measure()
-            .iterator()
-            .next()
-            .getValue()));
 
         assertThat(histograms, allOf(hasEntry("bucket=0.0", 0), hasEntry("bucket=2.0E8", 1), hasEntry("bucket=4.0E8", 1), hasEntry("bucket=Infinity", 3)));
 

mockito/src/test/java/com/baeldung/powermockito/introduction/LuckyNumberGenerator.java

@@ -0,0 +1,28 @@
+package com.baeldung.powermockito.introduction;
+
+class LuckyNumberGenerator {
+
+    public int getLuckyNumber(String name) {
+
+        saveIntoDatabase(name);
+
+        if (name == null) {
+            return getDefaultLuckyNumber();
+        }
+
+        return getComputedLuckyNumber(name.length());
+    }
+
+    private void saveIntoDatabase(String name) {
+        // Save the name into the database
+    }
+
+    private int getDefaultLuckyNumber() {
+        return 100;
+    }
+
+    private int getComputedLuckyNumber(int length) {
+        return length < 5 ? 5 : 10000;
+    }
+
+}

mockito/src/test/java/com/baeldung/powermockito/introduction/LuckyNumberGeneratorTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.powermockito.introduction;
+
+import static org.junit.Assert.assertEquals;
+import static org.powermock.api.mockito.PowerMockito.doReturn;
+import static org.powermock.api.mockito.PowerMockito.spy;
+import static org.powermock.api.mockito.PowerMockito.verifyPrivate;
+import static org.powermock.api.mockito.PowerMockito.when;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentMatchers;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(fullyQualifiedNames = "com.baeldung.powermockito.introduction.LuckyNumberGenerator")
+public class LuckyNumberGeneratorTest {
+
+    @Test
+    public final void givenPrivateMethodWithReturn_whenUsingPowerMockito_thenCorrect() throws Exception {
+        LuckyNumberGenerator mock = spy(new LuckyNumberGenerator());
+
+        when(mock, "getDefaultLuckyNumber").thenReturn(300);
+
+        int result = mock.getLuckyNumber(null);
+
+        assertEquals(300, result);
+    }
+
+    @Test
+    public final void givenPrivateMethodWithArgumentAndReturn_whenUsingPowerMockito_thenCorrect() throws Exception {
+        LuckyNumberGenerator mock = spy(new LuckyNumberGenerator());
+
+        doReturn(1).when(mock, "getComputedLuckyNumber", ArgumentMatchers.anyInt());
+
+        int result = mock.getLuckyNumber("Jack");
+
+        assertEquals(1, result);
+    }
+
+    @Test
+    public final void givenPrivateMethodWithNoArgumentAndReturn_whenUsingPowerMockito_thenCorrect() throws Exception {
+        LuckyNumberGenerator mock = spy(new LuckyNumberGenerator());
+
+        int result = mock.getLuckyNumber("Tyranosorous");
+
+        verifyPrivate(mock).invoke("saveIntoDatabase", ArgumentMatchers.anyString());
+        assertEquals(10000, result);
+    }
+
+}

mocks/README.md

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

mockserver/README.md

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

parent-boot-4/README.md

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

parent-boot-5/README.md

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

rest-assured/src/test/java/com/baeldung/restassured/RestAssured2IntegrationTest.java

@@ -1,55 +1,53 @@
 package com.baeldung.restassured;
 
+import com.github.tomakehurst.wiremock.WireMockServer;
+import io.restassured.RestAssured;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
 import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.get;
-import static com.github.tomakehurst.wiremock.client.WireMock.post;
 import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static io.restassured.RestAssured.get;
 import static org.hamcrest.Matchers.hasItems;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import static io.restassured.RestAssured.get;
-
-import com.github.tomakehurst.wiremock.WireMockServer;
-
 public class RestAssured2IntegrationTest {
-	private WireMockServer wireMockServer = new WireMockServer();
+    private static final int PORT = 8084;
+    private static WireMockServer wireMockServer = new WireMockServer(PORT);
 
-	private static final String EVENTS_PATH = "/odds";
+    private static final String EVENTS_PATH = "/odds";
-	private static final String APPLICATION_JSON = "application/json";
+    private static final String APPLICATION_JSON = "application/json";
-	private static final String ODDS = getJson();
+    private static final String ODDS = getJson();
 
-	@Before
+    @BeforeClass
-	public void before() throws Exception {
+    public static void before() throws Exception {
-		System.out.println("Setting up!");
+        System.out.println("Setting up!");
-		wireMockServer.start();
+        wireMockServer.start();
-		configureFor("localhost", 8080);
+        configureFor("localhost", PORT);
-		stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
+        RestAssured.port = PORT;
-				aResponse().withStatus(200)
+        stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
-						.withHeader("Content-Type", APPLICATION_JSON)
+          aResponse().withStatus(200)
-						.withBody(ODDS)));
+            .withHeader("Content-Type", APPLICATION_JSON)
-	}
+            .withBody(ODDS)));
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenVerifiesOddPricesAccuratelyByStatus_thenCorrect() {
+    public void givenUrl_whenVerifiesOddPricesAccuratelyByStatus_thenCorrect() {
-		get("/odds").then().body("odds.findAll { it.status > 0 }.price",
+        get("/odds").then().body("odds.findAll { it.status > 0 }.price",
-				hasItems(5.25f, 1.2f));
+          hasItems(5.25f, 1.2f));
-	}
+    }
 
-	private static String getJson() {
+    private static String getJson() {
-
+        return Util.inputStreamToString(RestAssured2IntegrationTest.class
-		return Util.inputStreamToString(new RestAssured2IntegrationTest().getClass()
+          .getResourceAsStream("/odds.json"));
-				.getResourceAsStream("/odds.json"));
+    }
-
-	}
-
-	@After
-	public void after() throws Exception {
-		System.out.println("Running: tearDown");
-		wireMockServer.stop();
-	}
 
+    @AfterClass
+    public static void after() throws Exception {
+        System.out.println("Running: tearDown");
+        wireMockServer.stop();
+    }
 }

rest-assured/src/test/java/com/baeldung/restassured/RestAssuredIntegrationTest.java

@@ -1,5 +1,14 @@
 package com.baeldung.restassured;
 
+import com.github.fge.jsonschema.SchemaVersion;
+import com.github.fge.jsonschema.cfg.ValidationConfiguration;
+import com.github.fge.jsonschema.main.JsonSchemaFactory;
+import com.github.tomakehurst.wiremock.WireMockServer;
+import io.restassured.RestAssured;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
 import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.get;
@@ -11,96 +20,86 @@ import static io.restassured.module.jsv.JsonSchemaValidatorSettings.settings;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasItems;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import com.github.fge.jsonschema.SchemaVersion;
-import com.github.fge.jsonschema.cfg.ValidationConfiguration;
-import com.github.fge.jsonschema.main.JsonSchemaFactory;
-import com.github.tomakehurst.wiremock.WireMockServer;
-
 public class RestAssuredIntegrationTest {
+    private static final int PORT = 8083;
+    private static WireMockServer wireMockServer = new WireMockServer(PORT);
 
-	private WireMockServer wireMockServer = new WireMockServer();
+    private static final String EVENTS_PATH = "/events?id=390";
-	private static final String EVENTS_PATH = "/events?id=390";
+    private static final String APPLICATION_JSON = "application/json";
-	private static final String APPLICATION_JSON = "application/json";
+    private static final String GAME_ODDS = getEventJson();
-	private static final String GAME_ODDS = getEventJson();
 
-	@Before
+    @BeforeClass
-	public void before() throws Exception {
+    public static void before() throws Exception {
-		System.out.println("Setting up!");
+        System.out.println("Setting up!");
-		wireMockServer.start();
+        wireMockServer.start();
-		configureFor("localhost", 8080);
+        RestAssured.port = PORT;
-		stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
+        configureFor("localhost", PORT);
-				aResponse().withStatus(200)
+        stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
-						.withHeader("Content-Type", APPLICATION_JSON)
+          aResponse().withStatus(200)
-						.withBody(GAME_ODDS)));
+            .withHeader("Content-Type", APPLICATION_JSON)
-	}
+            .withBody(GAME_ODDS)));
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenCheckingFloatValuePasses_thenCorrect() {
+    public void givenUrl_whenCheckingFloatValuePasses_thenCorrect() {
-		get("/events?id=390").then().assertThat()
+        get("/events?id=390").then().assertThat()
-				.body("odd.ck", equalTo(12.2f));
+          .body("odd.ck", equalTo(12.2f));
-	}
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenSuccessOnGetsResponseAndJsonHasRequiredKV_thenCorrect() {
+    public void givenUrl_whenSuccessOnGetsResponseAndJsonHasRequiredKV_thenCorrect() {
 
-		get("/events?id=390").then().statusCode(200).assertThat()
+        get("/events?id=390").then().statusCode(200).assertThat()
-				.body("id", equalTo("390"));
+          .body("id", equalTo("390"));
+    }
 
-	}
+    @Test
+    public void givenUrl_whenJsonResponseHasArrayWithGivenValuesUnderKey_thenCorrect() {
+        get("/events?id=390").then().assertThat()
+          .body("odds.price", hasItems("1.30", "5.25", "2.70", "1.20"));
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenJsonResponseHasArrayWithGivenValuesUnderKey_thenCorrect() {
+    public void givenUrl_whenJsonResponseConformsToSchema_thenCorrect() {
-		get("/events?id=390").then().assertThat()
-				.body("odds.price", hasItems("1.30", "5.25", "2.70", "1.20"));
-	}
 
-	@Test
+        get("/events?id=390").then().assertThat()
-	public void givenUrl_whenJsonResponseConformsToSchema_thenCorrect() {
+          .body(matchesJsonSchemaInClasspath("event_0.json"));
+    }
 
-		get("/events?id=390").then().assertThat()
+    @Test
-				.body(matchesJsonSchemaInClasspath("event_0.json"));
+    public void givenUrl_whenValidatesResponseWithInstanceSettings_thenCorrect() {
-	}
+        JsonSchemaFactory jsonSchemaFactory = JsonSchemaFactory
+          .newBuilder()
+          .setValidationConfiguration(
+            ValidationConfiguration.newBuilder()
+              .setDefaultVersion(SchemaVersion.DRAFTV4)
+              .freeze()).freeze();
 
-	@Test
+        get("/events?id=390")
-	public void givenUrl_whenValidatesResponseWithInstanceSettings_thenCorrect() {
+          .then()
-		JsonSchemaFactory jsonSchemaFactory = JsonSchemaFactory
+          .assertThat()
-				.newBuilder()
+          .body(matchesJsonSchemaInClasspath("event_0.json").using(
-				.setValidationConfiguration(
+            jsonSchemaFactory));
-						ValidationConfiguration.newBuilder()
+    }
-								.setDefaultVersion(SchemaVersion.DRAFTV4)
-								.freeze()).freeze();
 
-		get("/events?id=390")
+    @Test
-				.then()
+    public void givenUrl_whenValidatesResponseWithStaticSettings_thenCorrect() {
-				.assertThat()
-				.body(matchesJsonSchemaInClasspath("event_0.json").using(
-						jsonSchemaFactory));
 
-	}
+        get("/events?id=390")
+          .then()
+          .assertThat()
+          .body(matchesJsonSchemaInClasspath("event_0.json").using(
+            settings().with().checkedValidation(false)));
+    }
 
-	@Test
+    @AfterClass
-	public void givenUrl_whenValidatesResponseWithStaticSettings_thenCorrect() {
+    public static void after() throws Exception {
-
+        System.out.println("Running: tearDown");
-		get("/events?id=390")
+        wireMockServer.stop();
-				.then()
+    }
-				.assertThat()
-				.body(matchesJsonSchemaInClasspath("event_0.json").using(
-						settings().with().checkedValidation(false)));
-	}
-
-	@After
-	public void after() throws Exception {
-		System.out.println("Running: tearDown");
-		wireMockServer.stop();
-	}
-
-	private static String getEventJson() {
-		return Util.inputStreamToString(RestAssuredIntegrationTest.class
-				.getResourceAsStream("/event_0.json"));
-	}
 
+    private static String getEventJson() {
+        return Util.inputStreamToString(RestAssuredIntegrationTest.class
+          .getResourceAsStream("/event_0.json"));
+    }
 }

rest-assured/src/test/java/com/baeldung/restassured/RestAssuredXML2IntegrationTest.java

@@ -1,54 +1,55 @@
 package com.baeldung.restassured;
 
+import com.github.tomakehurst.wiremock.WireMockServer;
+import io.restassured.RestAssured;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
 import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.get;
-import static com.github.tomakehurst.wiremock.client.WireMock.post;
 import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static io.restassured.RestAssured.get;
 import static org.hamcrest.Matchers.hasItems;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import static io.restassured.RestAssured.get;
-
-import com.github.tomakehurst.wiremock.WireMockServer;
-
 public class RestAssuredXML2IntegrationTest {
-	private WireMockServer wireMockServer = new WireMockServer();
+    private static final int PORT = 8082;
+    private static WireMockServer wireMockServer = new WireMockServer(PORT);
 
-	private static final String EVENTS_PATH = "/teachers";
+    private static final String EVENTS_PATH = "/teachers";
-	private static final String APPLICATION_XML = "application/xml";
+    private static final String APPLICATION_XML = "application/xml";
-	private static final String TEACHERS = getXml();
+    private static final String TEACHERS = getXml();
 
-	@Before 
+    @BeforeClass
-	public void before() throws Exception {
+    public static void before() throws Exception {
-		System.out.println("Setting up!");
+        System.out.println("Setting up!");
-				wireMockServer.start();
+        wireMockServer.start();
-		configureFor("localhost", 8080);
+        RestAssured.port = PORT;
-		stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
+        configureFor("localhost", PORT);
-				aResponse().withStatus(200)
+        stubFor(get(urlEqualTo(EVENTS_PATH)).willReturn(
-						.withHeader("Content-Type", APPLICATION_XML)
+          aResponse().withStatus(200)
-						.withBody(TEACHERS)));
+            .withHeader("Content-Type", APPLICATION_XML)
-	}
+            .withBody(TEACHERS)));
-	@Test
+    }
-	public void givenUrl_whenVerifiesScienceTeacherFromXml_thenCorrect() {
-		get("/teachers")
-				.then()
-				.body("teachers.teacher.find { it.@department == 'science' }.subject",
-						hasItems("math", "physics"));
-	}
-	private static String getXml() {
-		
-		return Util
-				.inputStreamToString(new RestAssuredXML2IntegrationTest().getClass().getResourceAsStream("/teachers.xml"));
-	
-}
-	@After 
-public void after() throws Exception {
-	System.out.println("Running: tearDown");
-	wireMockServer.stop();
-}
 
+    @Test
+    public void givenUrl_whenVerifiesScienceTeacherFromXml_thenCorrect() {
+        get("/teachers")
+          .then()
+          .body("teachers.teacher.find { it.@department == 'science' }.subject",
+            hasItems("math", "physics"));
+    }
+
+    private static String getXml() {
+        return Util.inputStreamToString(RestAssuredXML2IntegrationTest.class
+          .getResourceAsStream("/teachers.xml"));
+    }
+
+    @AfterClass
+    public static void after() throws Exception {
+        System.out.println("Running: tearDown");
+        wireMockServer.stop();
+    }
 }

rest-assured/src/test/java/com/baeldung/restassured/RestAssuredXMLIntegrationTest.java

@@ -1,99 +1,90 @@
 package com.baeldung.restassured;
 
+import com.github.tomakehurst.wiremock.WireMockServer;
+import io.restassured.RestAssured;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
 import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
 import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
-import static com.github.tomakehurst.wiremock.client.WireMock.get;
 import static com.github.tomakehurst.wiremock.client.WireMock.post;
 import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
 import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
 import static io.restassured.RestAssured.post;
-import static io.restassured.RestAssured.get;
-import static io.restassured.module.jsv.JsonSchemaValidator.matchesJsonSchemaInClasspath;
-import static io.restassured.module.jsv.JsonSchemaValidatorSettings.settings;
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.hasItems;
 import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.xml.HasXPath.hasXPath;
 
-import java.io.FileNotFoundException;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import com.github.fge.jsonschema.SchemaVersion;
-import com.github.fge.jsonschema.cfg.ValidationConfiguration;
-import com.github.fge.jsonschema.main.JsonSchemaFactory;
-import com.github.tomakehurst.wiremock.WireMockServer;
 public class RestAssuredXMLIntegrationTest {
-	private WireMockServer wireMockServer = new WireMockServer();
+    private static final int PORT = 8081;
-	private static final String EVENTS_PATH = "/employees";
+    private static WireMockServer wireMockServer = new WireMockServer(PORT);
-	private static final String APPLICATION_XML = "application/xml";
-	private static final String EMPLOYEES = getXml();
 
-	@Before 
+    private static final String EVENTS_PATH = "/employees";
-	public void before() throws Exception {
+    private static final String APPLICATION_XML = "application/xml";
-		System.out.println("Setting up!");
+    private static final String EMPLOYEES = getXml();
-				wireMockServer.start();
-		configureFor("localhost", 8080);
-		stubFor(post(urlEqualTo(EVENTS_PATH)).willReturn(
-				aResponse().withStatus(200)
-						.withHeader("Content-Type", APPLICATION_XML)
-						.withBody(EMPLOYEES)));
-	}
-	@Test
-	public void givenUrl_whenXmlResponseValueTestsEqual_thenCorrect() {
-		post("/employees").then().assertThat()
-				.body("employees.employee.first-name", equalTo("Jane"));
-	}
 
-	@Test
+    @BeforeClass
-	public void givenUrl_whenMultipleXmlValuesTestEqual_thenCorrect() {
+    public static void before() throws Exception {
-		post("/employees").then().assertThat()
+        System.out.println("Setting up!");
-				.body("employees.employee.first-name", equalTo("Jane"))
+        wireMockServer.start();
-				.body("employees.employee.last-name", equalTo("Daisy"))
+        configureFor("localhost", PORT);
-				.body("employees.employee.sex", equalTo("f"));
+        RestAssured.port = PORT;
-	}
+        stubFor(post(urlEqualTo(EVENTS_PATH)).willReturn(
+          aResponse().withStatus(200)
+            .withHeader("Content-Type", APPLICATION_XML)
+            .withBody(EMPLOYEES)));
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenMultipleXmlValuesTestEqualInShortHand_thenCorrect() {
+    public void givenUrl_whenXmlResponseValueTestsEqual_thenCorrect() {
-		post("/employees")
+        post("/employees").then().assertThat()
-				.then()
+          .body("employees.employee.first-name", equalTo("Jane"));
-				.assertThat()
+    }
-				.body("employees.employee.first-name", equalTo("Jane"),
-						"employees.employee.last-name", equalTo("Daisy"),
-						"employees.employee.sex", equalTo("f"));
-	}
 
-	@Test
+    @Test
-	public void givenUrl_whenValidatesXmlUsingXpath_thenCorrect() {
+    public void givenUrl_whenMultipleXmlValuesTestEqual_thenCorrect() {
-		post("/employees")
+        post("/employees").then().assertThat()
-				.then()
+          .body("employees.employee.first-name", equalTo("Jane"))
-				.assertThat()
+          .body("employees.employee.last-name", equalTo("Daisy"))
-				.body(hasXPath("/employees/employee/first-name",
+          .body("employees.employee.sex", equalTo("f"));
-						containsString("Ja")));
+    }
 
-	}
+    @Test
+    public void givenUrl_whenMultipleXmlValuesTestEqualInShortHand_thenCorrect() {
+        post("/employees")
+          .then()
+          .assertThat()
+          .body("employees.employee.first-name", equalTo("Jane"),
+            "employees.employee.last-name", equalTo("Daisy"),
+            "employees.employee.sex", equalTo("f"));
+    }
 
-	@Test
+    @Test
-	public void givenUrl_whenValidatesXmlUsingXpath2_thenCorrect() {
+    public void givenUrl_whenValidatesXmlUsingXpath_thenCorrect() {
-		post("/employees")
+        post("/employees")
-				.then()
+          .then()
-				.assertThat()
+          .assertThat()
-				.body(hasXPath("/employees/employee/first-name[text()='Jane']"));
+          .body(hasXPath("/employees/employee/first-name",
+            containsString("Ja")));
+    }
 
-	}
+    @Test
+    public void givenUrl_whenValidatesXmlUsingXpath2_thenCorrect() {
+        post("/employees")
+          .then()
+          .assertThat()
+          .body(hasXPath("/employees/employee/first-name[text()='Jane']"));
+    }
 
+    private static String getXml() {
+        return Util
+          .inputStreamToString(RestAssuredXMLIntegrationTest.class.getResourceAsStream("/employees.xml"));
+    }
 
-	private static String getXml() {
+    @AfterClass
-		
+    public static void after() throws Exception {
-		return Util
+        System.out.println("Running: tearDown");
-				.inputStreamToString(new RestAssuredXMLIntegrationTest().getClass().getResourceAsStream("/employees.xml"));
+        wireMockServer.stop();
-	
+    }
-}
-	@After 
-public void after() throws Exception {
-	System.out.println("Running: tearDown");
-	wireMockServer.stop();
-}
 }

rest-assured/src/test/java/com/baeldung/restassured/Util.java

@@ -1,36 +1,15 @@
 package com.baeldung.restassured;
 
-import java.io.BufferedReader;
-import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
+import java.util.Scanner;
 
-public class Util {
+final class Util {
-	public static String inputStreamToString(InputStream is) {
-		BufferedReader br = null;
-		StringBuilder sb = new StringBuilder();
 
-		String line;
+    private Util() {
-		try {
+    }
 
-			br = new BufferedReader(new InputStreamReader(is));
+    static String inputStreamToString(InputStream is) {
-			while ((line = br.readLine()) != null) {
+        Scanner s = new Scanner(is).useDelimiter("\\A");
-				sb.append(line);
+        return s.hasNext() ? s.next() : "";
-			}
+    }
-
-		} catch (IOException e) {
-			e.printStackTrace();
-		} finally {
-			if (br != null) {
-				try {
-					br.close();
-				} catch (IOException e) {
-					e.printStackTrace();
-				}
-			}
-		}
-
-		return sb.toString();
-
-	}
 }

rest-with-spark-java/README.md

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

rmi/README.md

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

rule-engines/README.md

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

saas/README.md

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

spring-cucumber/src/main/java/com/baeldung/BaeldungController.java

@@ -1,22 +1,21 @@
 package com.baeldung;
 
-import javax.servlet.http.HttpServletResponse;
+import org.springframework.web.bind.annotation.GetMapping;
-
+import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
 
+import javax.servlet.http.HttpServletResponse;
+
 @RestController
 public class BaeldungController {
 
-    @RequestMapping(method = { RequestMethod.GET }, value = { "/hello" })
+    @GetMapping("/hello")
     public String sayHello(HttpServletResponse response) {
         return "hello";
     }
 
-    @RequestMapping(method = { RequestMethod.POST }, value = { "/baeldung" })
+    @PostMapping("/baeldung")
     public String sayHelloPost(HttpServletResponse response) {
         return "hello";
     }
-
 }

spring-cucumber/src/main/java/com/baeldung/SpringDemoApplication.java

@@ -2,23 +2,16 @@ package com.baeldung;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.builder.SpringApplicationBuilder;
-import org.springframework.boot.context.web.SpringBootServletInitializer;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.client.RestTemplate;
 
 @SpringBootApplication
-public class SpringDemoApplication extends SpringBootServletInitializer {
+public class SpringDemoApplication {
 
     public static void main(String[] args) {
         SpringApplication.run(SpringDemoApplication.class, args);
     }
 
-    @Override
-    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
-        return application.sources(SpringDemoApplication.class);
-    }
-
     @Bean
     public RestTemplate getRestTemplate() {
         return new RestTemplate();

spring-cucumber/src/main/resources/application.properties

@@ -0,0 +1 @@
+server.port=8082

spring-cucumber/src/test/java/com/baeldung/OtherDefsIntegrationTest.java

@@ -1,16 +0,0 @@
-package com.baeldung;
-
-import cucumber.api.java.en.Given;
-import cucumber.api.java.en.When;
-
-public class OtherDefsIntegrationTest extends SpringIntegrationTest {
-    @When("^the client calls /baeldung$")
-    public void the_client_issues_POST_hello() throws Throwable {
-        executePost("http://localhost:8080/baeldung");
-    }
-
-    @Given("^the client calls /hello$")
-    public void the_client_issues_GET_hello() throws Throwable {
-        executeGet("http://localhost:8080/hello");
-    }
-}

spring-cucumber/src/test/java/com/baeldung/ResponseResults.java

@@ -11,23 +11,19 @@ public class ResponseResults {
     private final ClientHttpResponse theResponse;
     private final String body;
 
-    protected ResponseResults(final ClientHttpResponse response) throws IOException {
+    ResponseResults(final ClientHttpResponse response) throws IOException {
         this.theResponse = response;
         final InputStream bodyInputStream = response.getBody();
-        if (null == bodyInputStream) {
+        final StringWriter stringWriter = new StringWriter();
-            this.body = "{}";
+        IOUtils.copy(bodyInputStream, stringWriter);
-        } else {
+        this.body = stringWriter.toString();
-            final StringWriter stringWriter = new StringWriter();
-            IOUtils.copy(bodyInputStream, stringWriter);
-            this.body = stringWriter.toString();
-        }
     }
 
-    protected ClientHttpResponse getTheResponse() {
+    ClientHttpResponse getTheResponse() {
         return theResponse;
     }
 
-    protected String getBody() {
+    String getBody() {
         return body;
     }
 }

spring-cucumber/src/test/java/com/baeldung/SpringIntegrationTest.java

@@ -1,9 +1,5 @@
 package com.baeldung;
 
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Map;
-
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.IntegrationTest;
 import org.springframework.boot.test.SpringApplicationContextLoader;
@@ -12,40 +8,39 @@ import org.springframework.http.client.ClientHttpResponse;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.web.WebAppConfiguration;
 import org.springframework.web.client.ResponseErrorHandler;
-import org.springframework.web.client.ResponseExtractor;
 import org.springframework.web.client.RestTemplate;
 
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
 //@RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = SpringDemoApplication.class, loader = SpringApplicationContextLoader.class)
 @WebAppConfiguration
 @IntegrationTest
 public class SpringIntegrationTest {
-    protected static ResponseResults latestResponse = null;
+    static ResponseResults latestResponse = null;
 
     @Autowired
     protected RestTemplate restTemplate;
 
-    protected void executeGet(String url) throws IOException {
+    void executeGet(String url) throws IOException {
         final Map<String, String> headers = new HashMap<>();
         headers.put("Accept", "application/json");
         final HeaderSettingRequestCallback requestCallback = new HeaderSettingRequestCallback(headers);
         final ResponseResultErrorHandler errorHandler = new ResponseResultErrorHandler();
 
         restTemplate.setErrorHandler(errorHandler);
-        latestResponse = restTemplate.execute(url, HttpMethod.GET, requestCallback, new ResponseExtractor<ResponseResults>() {
+        latestResponse = restTemplate.execute(url, HttpMethod.GET, requestCallback, response -> {
-            @Override
+            if (errorHandler.hadError) {
-            public ResponseResults extractData(ClientHttpResponse response) throws IOException {
+                return (errorHandler.getResults());
-                if (errorHandler.hadError) {
+            } else {
-                    return (errorHandler.getResults());
+                return (new ResponseResults(response));
-                } else {
-                    return (new ResponseResults(response));
-                }
             }
         });
-
     }
 
-    protected void executePost(String url) throws IOException {
+    void executePost() throws IOException {
         final Map<String, String> headers = new HashMap<>();
         headers.put("Accept", "application/json");
         final HeaderSettingRequestCallback requestCallback = new HeaderSettingRequestCallback(headers);
@@ -56,17 +51,14 @@ public class SpringIntegrationTest {
         }
 
         restTemplate.setErrorHandler(errorHandler);
-        latestResponse = restTemplate.execute(url, HttpMethod.POST, requestCallback, new ResponseExtractor<ResponseResults>() {
+        latestResponse = restTemplate
-            @Override
+          .execute("http://localhost:8082/baeldung", HttpMethod.POST, requestCallback, response -> {
-            public ResponseResults extractData(ClientHttpResponse response) throws IOException {
+              if (errorHandler.hadError) {
-                if (errorHandler.hadError) {
+                  return (errorHandler.getResults());
-                    return (errorHandler.getResults());
+              } else {
-                } else {
+                  return (new ResponseResults(response));
-                    return (new ResponseResults(response));
+              }
-                }
+          });
-            }
-        });
-
     }
 
     private class ResponseResultErrorHandler implements ResponseErrorHandler {

spring-cucumber/src/test/java/com/baeldung/StepDefsIntegrationTest.java

@@ -3,6 +3,7 @@ package com.baeldung;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
 
+import cucumber.api.java.en.Given;
 import org.springframework.http.HttpStatus;
 
 import cucumber.api.java.en.And;
@@ -11,9 +12,19 @@ import cucumber.api.java.en.When;
 
 public class StepDefsIntegrationTest extends SpringIntegrationTest {
 
+    @When("^the client calls /baeldung$")
+    public void the_client_issues_POST_hello() throws Throwable {
+        executePost();
+    }
+
+    @Given("^the client calls /hello$")
+    public void the_client_issues_GET_hello() throws Throwable {
+        executeGet("http://localhost:8082/hello");
+    }
+
     @When("^the client calls /version$")
     public void the_client_issues_GET_version() throws Throwable {
-        executeGet("http://localhost:8080/version");
+        executeGet("http://localhost:8082/version");
     }
 
     @Then("^the client receives status code of (\\d+)$")

spring-drools/README.md

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

spring-groovy/README.md

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

spring-hibernate5/src/test/java/com/baeldung/hibernate/immutable/HibernateImmutableIntegrationTest.java

@@ -23,11 +23,8 @@ public class HibernateImmutableIntegrationTest {
 
     @Before
     public void before() {
-        session = HibernateUtil.getSessionFactory().getCurrentSession();
+        session = HibernateUtil.getSessionFactory().openSession();
         session.beginTransaction();
-        createEvent();
-        createEventGenerated();
-        session.setCacheMode(CacheMode.REFRESH);
     }
 
     @BeforeClass
@@ -40,8 +37,6 @@ public class HibernateImmutableIntegrationTest {
         HibernateUtil.getSessionFactory().close();
     }
 
-    //
-
     @Test
     public void addEvent() {
         Event event = new Event();
@@ -49,15 +44,18 @@ public class HibernateImmutableIntegrationTest {
         event.setTitle("Public Event");
         session.save(event);
         session.getTransaction().commit();
+        session.close();
     }
 
     @Test
     public void updateEvent() {
+        createEvent();
         Event event = (Event) session.createQuery("FROM Event WHERE title='New Event'").list().get(0);
         event.setTitle("Private Event");
         session.update(event);
         session.flush();
         session.refresh(event);
+        session.close();
 
         assertThat(event.getTitle(), equalTo("New Event"));
         assertThat(event.getId(), equalTo(5L));
@@ -65,13 +63,16 @@ public class HibernateImmutableIntegrationTest {
 
     @Test
     public void deleteEvent() {
+        createEvent();
         Event event = (Event) session.createQuery("FROM Event WHERE title='New Event'").list().get(0);
         session.delete(event);
         session.getTransaction().commit();
+        session.close();
     }
 
     @Test
     public void addGuest() {
+        createEvent();
         Event event = (Event) session.createQuery("FROM Event WHERE title='New Event'").list().get(0);
         String newGuest = "Sara";
         event.getGuestList().add(newGuest);
@@ -79,6 +80,7 @@ public class HibernateImmutableIntegrationTest {
         exception.expect(PersistenceException.class);
         session.save(event);
         session.getTransaction().commit();
+        session.close();
     }
 
     @Test
@@ -94,18 +96,18 @@ public class HibernateImmutableIntegrationTest {
 
     @Test
     public void updateEventGenerated() {
+        createEventGenerated();
         EventGeneratedId eventGeneratedId = (EventGeneratedId) session.createQuery("FROM EventGeneratedId WHERE name LIKE '%John%'").list().get(0);
         eventGeneratedId.setName("Mike");
         session.update(eventGeneratedId);
         session.flush();
         session.refresh(eventGeneratedId);
+        session.close();
 
         assertThat(eventGeneratedId.getName(), equalTo("John"));
         assertThat(eventGeneratedId.getId(), equalTo(1L));
     }
 
-    //
-
     private static void createEvent() {
         Event event = new Event(5L, "New Event", Sets.newHashSet("guest"));
         session.save(event);

spring-mustache/README.md

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

spring-mybatis/README.md

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

spring-rest-simple/README.md

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

vaadin/README.md

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

video-tutorials/README.md

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