Merge remote-tracking branch 'upstream/master' into BAEL-5229

apache-olingo/.gitignore

@@ -27,3 +27,4 @@ HELP.md
 
 ### VS Code ###
 .vscode/
+

apache-olingo/Samples.md

@@ -4,15 +4,15 @@ This following table contains test URLs that can be used with the Olingo V2 demo
 
 | URL                                      | Description                                     |
 |------------------------------------------|-------------------------------------------------|
-| `http://localhost:8180/odata/$metadata`  | fetch OData metadata document |
+| `http://localhost:8080/odata/$metadata`  | fetch OData metadata document |
-| `http://localhost:8180/odata/CarMakers?$top=10&$skip=10` | Get 10 entities starting at offset 10 |
+| `http://localhost:8080/odata/CarMakers?$top=10&$skip=10` | Get 10 entities starting at offset 10 |
-| `http://localhost:8180/odata/CarMakers?$count` | Return total count of entities in this set |
+| `http://localhost:8080/odata/CarMakers?$count` | Return total count of entities in this set |
-| `http://localhost:8180/odata/CarMakers?$filter=startswith(Name,'B')` | Return entities where the *Name* property starts with 'B' |
+| `http://localhost:8080/odata/CarMakers?$filter=startswith(Name,'B')` | Return entities where the *Name* property starts with 'B' |
-| `http://localhost:8180/odata/CarModels?$filter=Year eq 2008 and CarMakerDetails/Name eq 'BWM'` | Return *CarModel* entities where the *Name* property of its maker  starts with 'B' |
+| `http://localhost:8080/odata/CarModels?$filter=Year eq 2008 and CarMakerDetails/Name eq 'BWM'` | Return *CarModel* entities where the *Name* property of its maker  starts with 'B' |
-| `http://localhost:8180/odata/CarModels(1L)?$expand=CarMakerDetails` | Return the *CarModel* with primary key '1', along with its maker|
+| `http://localhost:8080/odata/CarModels(1L)?$expand=CarMakerDetails` | Return the *CarModel* with primary key '1', along with its maker|
-| `http://localhost:8180/odata/CarModels(1L)?$select=Name,Sku` | Return the *CarModel* with primary key '1', returing only its *Name* and *Sku* properties |
+| `http://localhost:8080/odata/CarModels(1L)?$select=Name,Sku` | Return the *CarModel* with primary key '1', returing only its *Name* and *Sku* properties |
-| `http://localhost:8180/odata/CarModels?$orderBy=Name asc,Sku desc` | Return *CarModel* entities, ordered by the their *Name* and *Sku* properties |
+| `http://localhost:8080/odata/CarModels?$orderBy=Name asc,Sku desc` | Return *CarModel* entities, ordered by the their *Name* and *Sku* properties |
-| `http://localhost:8180/odata/CarModels?$format=json` | Return *CarModel* entities, using a JSON representation|
+| `http://localhost:8080/odata/CarModels?$format=json` | Return *CarModel* entities, using a JSON representation|
 
 
 

apache-olingo/pom.xml

@@ -3,16 +3,16 @@
     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.baeldung.examples.olingo2</groupId>
+    <groupId>com.baeldung.examples.olingo</groupId>
-    <artifactId>olingo2</artifactId>
+    <artifactId>apache-olingo</artifactId>
-    <name>olingo2</name>
+    <name>apache-olingo</name>
-    <description>Sample Olingo 2 Project</description>
+    <description>Sample Apache Olingo Project</description>
 
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
+        <relativePath>../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>
@@ -43,7 +43,7 @@
         <dependency>
             <groupId>org.apache.olingo</groupId>
             <artifactId>olingo-odata2-core</artifactId>
-            <version>${olingo2.version}</version>
+            <version>${olingo.version}</version>
             <!-- Avoid jax-rs version conflict by excluding Olingo's version -->
             <exclusions>
                 <exclusion>
@@ -55,12 +55,12 @@
         <dependency>
             <groupId>org.apache.olingo</groupId>
             <artifactId>olingo-odata2-jpa-processor-core</artifactId>
-            <version>${olingo2.version}</version>
+            <version>${olingo.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.olingo</groupId>
             <artifactId>olingo-odata2-jpa-processor-ref</artifactId>
-            <version>${olingo2.version}</version>
+            <version>${olingo.version}</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.eclipse.persistence</groupId>
@@ -80,7 +80,7 @@
     </build>
 
     <properties>
-        <olingo2.version>2.0.11</olingo2.version>
+        <olingo.version>2.0.11</olingo.version>
     </properties>
 
 </project>

apache-olingo/src/main/java/com/baeldung/examples/olingo2/CarsODataJPAServiceFactory.java

@@ -27,11 +27,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Component;
 
-/**
- * ODataJPAServiceFactory implementation for our sample domain 
- * @author Philippe
- *
- */
 @Component
 public class CarsODataJPAServiceFactory extends ODataJPAServiceFactory {
 

apache-olingo/src/main/java/com/baeldung/examples/olingo2/JerseyConfig.java

@@ -1,6 +1,12 @@
 package com.baeldung.examples.olingo2;
 
-import java.io.IOException;
+import org.apache.olingo.odata2.api.ODataServiceFactory;
+import org.apache.olingo.odata2.core.rest.ODataRootLocator;
+import org.apache.olingo.odata2.core.rest.app.ODataApplication;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
 
 import javax.persistence.EntityManager;
 import javax.persistence.EntityManagerFactory;
@@ -15,19 +21,6 @@ import javax.ws.rs.container.ContainerResponseFilter;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.ext.Provider;
 
-import org.apache.olingo.odata2.api.ODataServiceFactory;
-import org.apache.olingo.odata2.core.rest.ODataRootLocator;
-import org.apache.olingo.odata2.core.rest.app.ODataApplication;
-import org.glassfish.jersey.server.ResourceConfig;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.stereotype.Component;
-
-/**
- * Jersey JAX-RS configuration
- * @author Philippe
- *
- */
 @Component
 @ApplicationPath("/odata")
 public class JerseyConfig extends ResourceConfig {
@@ -72,7 +65,7 @@ public class JerseyConfig extends ResourceConfig {
         }
 
         @Override
-        public void filter(ContainerRequestContext ctx) throws IOException {
+        public void filter(ContainerRequestContext ctx) {
             log.info("[I60] >>> filter");
             EntityManager em = this.emf.createEntityManager();
             httpRequest.setAttribute(EM_REQUEST_ATTRIBUTE, em);
@@ -85,7 +78,7 @@ public class JerseyConfig extends ResourceConfig {
         }
 
         @Override
-        public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
+        public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) {
 
             log.info("[I68] <<< filter");
             EntityManager em = (EntityManager) httpRequest.getAttribute(EM_REQUEST_ATTRIBUTE);

apache-olingo/src/test/java/com/baeldung/examples/olingo2/Olingo2SampleApplicationIntegrationTest.java

@@ -7,7 +7,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
-public class Olingo2SampleApplicationUnitTest {
+public class Olingo2SampleApplicationIntegrationTest {
 
 	@Test
 	public void contextLoads() {

apache-shiro/pom.xml

@@ -47,7 +47,7 @@
 
     <properties>
         <apache-shiro-core-version>1.5.3</apache-shiro-core-version>
-        <log4j-version>1.2.17</log4j-version>
+        <log4j.version>2.17.1</log4j.version>
     </properties>
 
 </project>

apache-spark/src/test/java/com/baeldung/differences/rdd/TransformationsUnitTest.java

@@ -1,9 +1,9 @@
 package com.baeldung.differences.rdd;
 
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaRDD;
@@ -12,9 +12,12 @@ import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import java.io.File;
+
 public class TransformationsUnitTest {
 
     public static final String COMMA_DELIMITER = ",(?=([^\"]*\"[^\"]*\")*[^\"]*$)";
+
     private static JavaSparkContext sc;
     private static JavaRDD<String> tourists;
 
@@ -25,6 +28,9 @@ public class TransformationsUnitTest {
         sc = new JavaSparkContext(conf);
         tourists = sc.textFile("data/Tourist.csv")
             .filter(line -> !line.startsWith("Region")); //filter header row
+
+        // delete previous output dir and files
+        FileUtils.deleteQuietly(new File("data/output"));
     }
 
     @AfterClass

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/iterators/Iterators.java

@@ -1,17 +1,16 @@
 package com.baeldung.collections.iterators;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.concurrent.ConcurrentHashMap;
 
-/**
- * Source code https://github.com/eugenp/tutorials
- *
- * @author Santosh Thakur
- */
-
 public class Iterators {
 
+    private static final Logger LOG = LoggerFactory.getLogger(Iterators.class);
+
     public static int failFast1() {
         ArrayList<Integer> numbers = new ArrayList<>();
 
@@ -44,7 +43,7 @@ public class Iterators {
             }
         }
 
-        System.out.println("using iterator's remove method = " + numbers);
+        LOG.debug("using iterator's remove method = {}", numbers);
 
         iterator = numbers.iterator();
         while (iterator.hasNext()) {

core-java-modules/core-java-collections-3/src/test/java/com/baeldung/collections/bitset/BitSetUnitTest.java

@@ -3,6 +3,8 @@ package com.baeldung.collections.bitset;
 import org.junit.Test;
 import org.openjdk.jol.info.ClassLayout;
 import org.openjdk.jol.info.GraphLayout;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.BitSet;
 
@@ -10,18 +12,20 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 public class BitSetUnitTest {
 
+    private static final Logger LOG = LoggerFactory.getLogger(BitSetUnitTest.class);
+
     @Test
     public void givenBoolArray_whenMemoryLayout_thenConsumeMoreThanOneBit() {
         boolean[] bits = new boolean[1024 * 1024];
 
-        System.out.println(ClassLayout.parseInstance(bits).toPrintable());
+        LOG.debug(ClassLayout.parseInstance(bits).toPrintable());
     }
 
     @Test
     public void givenBitSet_whenMemoryLayout_thenConsumeOneBitPerFlag() {
         BitSet bitSet = new BitSet(1024 * 1024);
 
-        System.out.println(GraphLayout.parseInstance(bitSet).toPrintable());
+        LOG.debug(GraphLayout.parseInstance(bitSet).toPrintable());
     }
 
     @Test
@@ -157,7 +161,7 @@ public class BitSetUnitTest {
         BitSet bitSet = new BitSet();
         bitSet.set(15, 25);
 
-        bitSet.stream().forEach(System.out::println);
+        bitSet.stream().forEach(bit -> LOG.debug(String.valueOf(bit)));
         assertThat(bitSet.stream().count()).isEqualTo(10);
     }
 

core-java-modules/core-java-collections-3/src/test/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-modules/core-java-concurrency-advanced-2/src/main/java/com/baeldung/concurrent/prioritytaskexecution/Job.java

@@ -1,8 +1,14 @@
 package com.baeldung.concurrent.prioritytaskexecution;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class Job implements Runnable {
-    private String jobName;
+
-    private JobPriority jobPriority;
+    private static final Logger LOGGER = LoggerFactory.getLogger(Job.class);
+
+    private final String jobName;
+    private final JobPriority jobPriority;
 
     public Job(String jobName, JobPriority jobPriority) {
         this.jobName = jobName;
@@ -16,8 +22,7 @@ public class Job implements Runnable {
     @Override
     public void run() {
         try {
-            System.out.println("Job:" + jobName + 
+            LOGGER.debug("Job:{} Priority:{}", jobName, jobPriority);
-              " Priority:" + jobPriority);
             Thread.sleep(1000);
         } catch (InterruptedException ignored) {
         }

core-java-modules/core-java-concurrency-advanced-2/src/main/java/com/baeldung/forkjoin/CustomRecursiveAction.java

@@ -1,19 +1,21 @@
 package com.baeldung.forkjoin;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.ForkJoinTask;
 import java.util.concurrent.RecursiveAction;
-import java.util.logging.Logger;
 
 public class CustomRecursiveAction extends RecursiveAction {
 
+    final Logger logger = LoggerFactory.getLogger(CustomRecursiveAction.class);
+
     private String workLoad = "";
     private static final int THRESHOLD = 4;
 
-    private static Logger logger = Logger.getAnonymousLogger();
-
     public CustomRecursiveAction(String workLoad) {
         this.workLoad = workLoad;
     }
@@ -43,7 +45,7 @@ public class CustomRecursiveAction extends RecursiveAction {
 
     private void processing(String work) {
         String result = work.toUpperCase();
-        logger.info("This result - (" + result + ") - was processed by " + Thread.currentThread()
+        logger.debug("This result - (" + result + ") - was processed by " + Thread.currentThread()
             .getName());
     }
 }

core-java-modules/core-java-concurrency-advanced-2/src/test/java/com/baeldung/concurrent/prioritytaskexecution/PriorityJobSchedulerUnitTest.java

@@ -3,8 +3,8 @@ package com.baeldung.concurrent.prioritytaskexecution;
 import org.junit.Test;
 
 public class PriorityJobSchedulerUnitTest {
-    private static int POOL_SIZE = 1;
+    private static final int POOL_SIZE = 1;
-    private static int QUEUE_SIZE = 10;
+    private static final int QUEUE_SIZE = 10;
 
     @Test
     public void whenMultiplePriorityJobsQueued_thenHighestPriorityJobIsPicked() {

core-java-modules/core-java-concurrency-advanced-2/src/test/java/com/baeldung/forkjoin/Java8ForkJoinIntegrationTest.java

@@ -1,18 +1,15 @@
 package com.baeldung.forkjoin;
 
-import static org.junit.Assert.assertEquals;
+import com.baeldung.forkjoin.util.PoolUtil;
-import static org.junit.Assert.assertNotNull;
+import org.junit.Before;
-import static org.junit.Assert.assertTrue;
+import org.junit.Test;
 
 import java.util.Random;
 import java.util.concurrent.ForkJoinPool;
 
-import org.junit.Before;
+import static org.junit.Assert.assertEquals;
-import org.junit.Test;
+import static org.junit.Assert.assertNotNull;
-
+import static org.junit.Assert.assertTrue;
-import com.baeldung.forkjoin.CustomRecursiveAction;
-import com.baeldung.forkjoin.CustomRecursiveTask;
-import com.baeldung.forkjoin.util.PoolUtil;
 
 public class Java8ForkJoinIntegrationTest {
 
@@ -63,11 +60,11 @@ public class Java8ForkJoinIntegrationTest {
         ForkJoinPool forkJoinPool = ForkJoinPool.commonPool();
 
         forkJoinPool.execute(customRecursiveTask);
-        int result = customRecursiveTask.join();
+        customRecursiveTask.join();
         assertTrue(customRecursiveTask.isDone());
 
         forkJoinPool.submit(customRecursiveTask);
-        int resultTwo = customRecursiveTask.join();
+        customRecursiveTask.join();
         assertTrue(customRecursiveTask.isDone());
     }
 

core-java-modules/core-java-concurrency-advanced-2/src/test/java/com/baeldung/thread/join/ThreadJoinUnitTest.java

@@ -1,12 +1,12 @@
 package com.baeldung.thread.join;
 
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-
-import java.util.logging.Logger;
-
 import org.junit.Ignore;
 import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 
 /**
  * Demonstrates Thread.join behavior.
@@ -14,39 +14,39 @@ import org.junit.Test;
  */
 public class ThreadJoinUnitTest {
 
-    final static Logger LOGGER = Logger.getLogger(ThreadJoinUnitTest.class.getName());
+    private static final Logger LOGGER = LoggerFactory.getLogger(ThreadJoinUnitTest.class);
 
-    class SampleThread extends Thread {
+    static class SampleThread extends Thread {
-        public int processingCount = 0;
+        public int processingCount;
 
         SampleThread(int processingCount) {
             this.processingCount = processingCount;
-            LOGGER.info("Thread " + this.getName() + " created");
+            LOGGER.debug("Thread " + this.getName() + " created");
         }
 
         @Override
         public void run() {
-            LOGGER.info("Thread " + this.getName() + " started");
+            LOGGER.debug("Thread " + this.getName() + " started");
             while (processingCount > 0) {
                 try {
                     Thread.sleep(1000); // Simulate some work being done by thread
                 } catch (InterruptedException e) {
-                    LOGGER.info("Thread " + this.getName() + " interrupted.");
+                    LOGGER.debug("Thread " + this.getName() + " interrupted.");
                 }
                 processingCount--;
-                LOGGER.info("Inside Thread " + this.getName() + ", processingCount = " + processingCount);
+                LOGGER.debug("Inside Thread " + this.getName() + ", processingCount = " + processingCount);
             }
-            LOGGER.info("Thread " + this.getName() + " exiting");
+            LOGGER.debug("Thread " + this.getName() + " exiting");
         }
     }
 
     @Test
     public void givenNewThread_whenJoinCalled_returnsImmediately() throws InterruptedException {
         Thread t1 = new SampleThread(0);
-        LOGGER.info("Invoking join.");
+        LOGGER.debug("Invoking join.");
         t1.join();
-        LOGGER.info("Returned from join");
+        LOGGER.debug("Returned from join");
-        LOGGER.info("Thread state is" + t1.getState());
+        LOGGER.debug("Thread state is" + t1.getState());
         assertFalse(t1.isAlive());
     }
 
@@ -55,9 +55,9 @@ public class ThreadJoinUnitTest {
       throws InterruptedException {
         Thread t2 = new SampleThread(1);
         t2.start();
-        LOGGER.info("Invoking join.");
+        LOGGER.debug("Invoking join.");
         t2.join();
-        LOGGER.info("Returned from join");
+        LOGGER.debug("Returned from join");
         assertFalse(t2.isAlive());
     }
 

core-java-modules/core-java-concurrency-advanced-2/src/test/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>

core-java-modules/core-java-concurrency-basic-2/README.md

@@ -12,7 +12,6 @@ This module contains articles about basic Java concurrency
 - [Guide to AtomicMarkableReference](https://www.baeldung.com/java-atomicmarkablereference)
 - [Why are Local Variables Thread-Safe in Java](https://www.baeldung.com/java-local-variables-thread-safe)
 - [How to Stop Execution After a Certain Time in Java](https://www.baeldung.com/java-stop-execution-after-certain-time)
-- [How to Handle InterruptedException in Java](https://www.baeldung.com/java-interrupted-exception)
 - [How to Get the Number of Threads in a Java Process](https://www.baeldung.com/java-get-number-of-threads)
 - [Set the Name of a Thread in Java](https://www.baeldung.com/java-set-thread-name)
-- [[<-- Prev]](/core-java-modules/core-java-concurrency-basic)
+- [[<-- Prev]](../core-java-concurrency-basic)[[Next -->]](../core-java-concurrency-basic-3)

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

@@ -7,12 +7,6 @@
         </encoder>
     </appender>
 
-    <logger name="org.springframework" level="WARN" />
-    <logger name="org.springframework.transaction" level="WARN" />
-
-    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
-    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
-
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>

core-java-modules/core-java-concurrency-basic-3/README.md

@@ -0,0 +1,8 @@
+## Core Java Concurrency Basic
+
+This module contains articles about basic Java concurrency.
+
+### Relevant Articles: 
+
+- [How to Handle InterruptedException in Java](https://www.baeldung.com/java-interrupted-exception)
+- [[<-- Prev]](../core-java-concurrency-basic-2)

core-java-modules/core-java-concurrency-basic-3/pom.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-concurrency-basic-3</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-concurrency-basic-3</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <build>
+        <finalName>core-java-concurrency-basic-3</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+</project>

core-java-modules/core-java-concurrency-basic-3/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-modules/core-java-concurrency-basic-3/src/test/java/com/baeldung/concurrent/interrupt/InterruptExampleUnitTest.java

@@ -1,7 +1,7 @@
 package com.baeldung.concurrent.interrupt;
 
-import static org.junit.Assert.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
 
@@ -9,7 +9,7 @@ public class InterruptExampleUnitTest {
 
     @Test
     public void whenPropagateException_thenThrowsInterruptedException() {
-        assertThrows(InterruptedException.class, () -> InterruptExample.propagateException());
+        assertThrows(InterruptedException.class, InterruptExample::propagateException);
     }
 
     @Test
@@ -19,7 +19,7 @@ public class InterruptExampleUnitTest {
 
     @Test
     public void whenThrowCustomException_thenContainsExpectedMessage() {
-        Exception exception = assertThrows(CustomInterruptedException.class, () -> InterruptExample.throwCustomException());
+        Exception exception = assertThrows(CustomInterruptedException.class, InterruptExample::throwCustomException);
         String expectedMessage = "This thread was interrupted";
         String actualMessage = exception.getMessage();
 

core-java-modules/core-java-exceptions-4/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Java ArrayIndexOutOfBoundsException](https://www.baeldung.com/java-arrayindexoutofboundsexception)

core-java-modules/core-java-exceptions-4/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.exceptions</groupId>
+    <artifactId>core-java-exceptions-4</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-exceptions-4</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <compilerArgs>
+<!--                         Comment the arg below to print complete stack trace information -->
+<!--                        <arg>-g:none</arg>-->
+                    </compilerArgs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <h2.version>1.4.191</h2.version>
+    </properties>
+
+</project>

core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/arrayindexoutofbounds/ArrayIndexOutOfBoundsExceptionDemo.java

@@ -0,0 +1,31 @@
+package com.baeldung.exception.arrayindexoutofbounds;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class ArrayIndexOutOfBoundsExceptionDemo {
+
+    public static void main(String[] args) {
+        int[] numbers = new int[] { 1, 2, 3, 4, 5 };
+        
+        getArrayElementAtIndex(numbers, 5);
+        getListElementAtIndex(5);
+        addArrayElementsUsingLoop(numbers);
+    }
+
+    public static void addArrayElementsUsingLoop(int[] numbers) {
+        int sum = 0;
+        for (int i = 0; i <= numbers.length; i++) {
+            sum += numbers[i];
+        }
+    }
+
+    public static int getListElementAtIndex(int index) {
+        List<Integer> numbersList = Arrays.asList(1, 2, 3, 4, 5);
+        return numbersList.get(index);
+    }
+
+    public static int getArrayElementAtIndex(int[] numbers, int index) {
+        return numbers[index];
+    }
+}

core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/arrayindexoutofbounds/ArrayIndexOutOfBoundsExceptionDemoUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.exception.arrayindexoutofbounds;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+public class ArrayIndexOutOfBoundsExceptionDemoUnitTest {
+
+    private static int[] numbers;
+
+    @BeforeAll
+    public static void setUp() {
+        numbers = new int[] { 1, 2, 3, 4, 5 };
+    }
+
+    @Test
+    void givenAnArrayOfSizeFive_whenAccessedElementBeyondRange_thenShouldThrowArrayIndexOutOfBoundsException() {
+        assertThrows(ArrayIndexOutOfBoundsException.class,
+          () -> ArrayIndexOutOfBoundsExceptionDemo.addArrayElementsUsingLoop(numbers));
+    }
+
+    @Test
+    void givenAnArrayOfSizeFive_whenAccessedAnElementAtIndexEqualToSize_thenShouldThrowArrayIndexOutOfBoundsException() {
+        assertThrows(ArrayIndexOutOfBoundsException.class,
+          () -> ArrayIndexOutOfBoundsExceptionDemo.getArrayElementAtIndex(numbers, 5));
+    }
+
+    @Test
+    void givenAListReturnedByArraysAsListMethod_whenAccessedAnElementAtIndexEqualToSize_thenShouldThrowArrayIndexOutOfBoundsException() {
+        assertThrows(ArrayIndexOutOfBoundsException.class,
+          () -> ArrayIndexOutOfBoundsExceptionDemo.getListElementAtIndex(5));
+    }
+}

core-java-modules/core-java-io/src/main/resources/log4j.properties

@@ -1,6 +0,0 @@
-log4j.rootLogger=DEBUG, A1
-
-log4j.appender.A1=org.apache.log4j.ConsoleAppender
-
-log4j.appender.A1.layout=org.apache.log4j.PatternLayout
-log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

core-java-modules/core-java-io/src/main/resources/log4jstructuraldp.properties

@@ -1,9 +0,0 @@
-
-# Root logger 
-log4j.rootLogger=INFO, file, stdout
-
-# Write to console
-log4j.appender.stdout=org.apache.log4j.ConsoleAppender
-log4j.appender.stdout.Target=System.out
-log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

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

@@ -7,13 +7,8 @@
         </encoder>
     </appender>
 
-    <logger name="org.springframework" level="WARN" />
-    <logger name="org.springframework.transaction" level="WARN" />
     <logger name="net.sf.jmimemagic" level="WARN" />
 
-    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
-    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
-
     <root level="INFO">
         <appender-ref ref="STDOUT" />
     </root>

core-java-modules/multimodulemavenproject/README.md

@@ -1,3 +1,4 @@
 ## Relevant Articles
 
 - [Multi-Module Maven Application with Java Modules](https://www.baeldung.com/maven-multi-module-project-java-jpms)
+- [Importing Maven Project into Eclipse](https://www.baeldung.com/maven-import-eclipse)

core-java-modules/pom.xml

@@ -46,6 +46,7 @@
         <module>core-java-concurrency-advanced-4</module>
         <module>core-java-concurrency-basic</module>
         <module>core-java-concurrency-basic-2</module>
+        <module>core-java-concurrency-basic-3</module>
         <module>core-java-concurrency-collections</module>
         <module>core-java-concurrency-collections-2</module>
         <module>core-java-console</module>
@@ -55,6 +56,7 @@
         <module>core-java-exceptions</module>
         <module>core-java-exceptions-2</module>
         <module>core-java-exceptions-3</module>
+        <module>core-java-exceptions-4</module>
         <module>core-java-function</module>
         <module>core-java-functional</module>
         <module>core-java-io</module>

feign/README.md

@@ -5,4 +5,5 @@ This module contains articles about Feign
 ### Relevant Articles:
 
 - [Intro to Feign](https://www.baeldung.com/intro-to-feign)
+- [Retrying Feign Calls](https://www.baeldung.com/feign-retry)
 

javaxval/README.md

@@ -11,3 +11,4 @@ This module contains articles about Bean Validation.
 - [Grouping Javax Validation Constraints](https://www.baeldung.com/javax-validation-groups)
 - [Validations for Enum Types](https://www.baeldung.com/javax-validations-enums)
 - [Guide to ParameterMessageInterpolator](https://www.baeldung.com/hibernate-parametermessageinterpolator)
+- [Hibernate Validator Annotation Processor in Depth](https://www.baeldung.com/hibernate-validator-annotation-processor)

javaxval/pom.xml

@@ -15,7 +15,7 @@
 
     <dependencies>
         <dependency>
-            <groupId>org.hibernate</groupId>
+            <groupId>org.hibernate.validator</groupId>
             <artifactId>hibernate-validator</artifactId>
             <version>${hibernate-validator.version}</version>
         </dependency>
@@ -36,8 +36,43 @@
         </dependency>
     </dependencies>
 
+    <!-- uncomment in order to enable Hibernate Validator Anotation Processor -->
+    <!--
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven.compiler.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <fork>true</fork>
+                    <compilerArgs>
+                        <arg>-Averbose=true</arg>
+                        <arg>-AmethodConstraintsSupported=true</arg>
+                        <arg>-AdiagnosticKind=ERROR</arg>
+                    </compilerArgs>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.hibernate.validator</groupId>
+                            <artifactId>hibernate-validator-annotation-processor</artifactId>
+                            <version>${hibernate-validator.ap.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    -->
+
     <properties>
         <hibernate-validator.version>6.0.13.Final</hibernate-validator.version>
+        <hibernate-validator.ap.version>6.2.0.Final</hibernate-validator.ap.version>
+        <maven.compiler.version>3.6.1</maven.compiler.version>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
         <javax.el.version>3.0.0</javax.el.version>
         <org.springframework.version>5.0.2.RELEASE</org.springframework.version>
     </properties>

javaxval/src/main/java/com/baeldung/javaxval/hibernate/validator/ap/Message.java

@@ -0,0 +1,95 @@
+package com.baeldung.javaxval.hibernate.validator.ap;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Past;
+import java.util.List;
+import java.util.Optional;
+
+public class Message {
+
+    @NotNull(message = "Content cannot be null")
+    private String content;
+
+    private boolean isDelivered;
+
+    private List<@NotBlank String> recipients;
+
+    // uncomment in order to trigger AP annotation detection
+    // The annotation @Past is disallowed for this data type.
+    // @Past
+    private String createdAt;
+
+    public String getContent() {
+        return content;
+    }
+
+    public Message(String content, boolean isDelivered, List<@NotBlank String> recipients, String createdAt) {
+        this.content = content;
+        this.isDelivered = isDelivered;
+        this.recipients = recipients;
+        this.createdAt = createdAt;
+    }
+
+    // uncomment in order to trigger AP annotation detection
+    // The annotation @Min is disallowed for the return type of this method.
+    // @Min(3)
+    public boolean broadcast() {
+        // setup a logic
+        // to send to recipients
+        return true;
+    }
+
+    // uncomment in order to trigger AP annotation detection
+    // Void methods may not be annotated with constraint annotations.
+    // @NotNull
+    public void archive() {
+        // archive the message
+    }
+
+    // uncomment in order to trigger AP annotation detection
+    // Constraint annotations must not be specified at methods, which are no valid JavaBeans getter methods.
+    // NOTE: add <arg>-AmethodConstraintsSupported=false</arg> to compiler args before
+    // @AssertTrue
+    public boolean delete() {
+        // delete the message
+        return false;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public boolean isDelivered() {
+        return isDelivered;
+    }
+
+    public void setDelivered(boolean delivered) {
+        isDelivered = delivered;
+    }
+
+    public List<String> getRecipients() {
+        return recipients;
+    }
+
+    public void setRecipients(List<String> recipients) {
+        this.recipients = recipients;
+    }
+
+    public void setCreatedAt(String createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public String getName() {
+        return content;
+    }
+
+    public void setName(String content) {
+        this.content = content;
+    }
+
+    public Optional<@Past String> getCreatedAt() {
+        return Optional.ofNullable(createdAt);
+    }
+
+}

logging-modules/log-mdc/pom.xml

@@ -94,7 +94,7 @@
     </build>
 
     <properties>
-        <log4j2.version>2.7</log4j2.version>
+        <log4j2.version>2.17.1</log4j2.version>
         <disruptor.version>3.3.6</disruptor.version>
         <jbosslogging.version>3.3.0.Final</jbosslogging.version>
     </properties>

logging-modules/log4j/pom.xml

@@ -46,8 +46,8 @@
 
     <properties>
         <log4j.version>1.2.17</log4j.version>
-        <log4j-api.version>2.7</log4j-api.version>
+        <log4j-api.version>2.17.1</log4j-api.version>
-        <log4j-core.version>2.7</log4j-core.version>
+        <log4j-core.version>2.17.1</log4j-core.version>
         <disruptor.version>3.3.6</disruptor.version>
     </properties>
 

logging-modules/log4j2/README.md

@@ -7,3 +7,4 @@
 - [Get Log Output in JSON](http://www.baeldung.com/java-log-json-output)
 - [System.out.println vs Loggers](https://www.baeldung.com/java-system-out-println-vs-loggers)
 - [Log4j 2 Plugins](https://www.baeldung.com/log4j2-plugins)
+- [Printing Thread Info in Log File Using Log4j2](https://www.baeldung.com/log4j2-print-thread-info)

logging-modules/log4j2/pom.xml

@@ -111,7 +111,7 @@
 
     <properties>
         <commons-dbcp2.version>2.1.1</commons-dbcp2.version>
-        <log4j-core.version>2.11.0</log4j-core.version>
+        <log4j-core.version>2.17.1</log4j-core.version>
         <maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
     </properties>
 

logging-modules/log4j2/src/main/java/com/baeldung/logging/log4j2threadinfo/Log4j2ThreadInfo.java

@@ -0,0 +1,18 @@
+package com.baeldung.logging.log4j2threadinfo;
+
+import java.util.stream.IntStream;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class Log4j2ThreadInfo {
+    private static final Logger logger = LogManager.getLogger(Log4j2ThreadInfo.class);
+
+    public static void main(String[] args) {
+        IntStream.range(0, 5).forEach(i -> {
+            Runnable runnable = () -> logger.info("Logging info");
+            Thread thread = new Thread(runnable);
+            thread.start();
+        });
+    }
+}

logging-modules/log4j2/src/main/resources/log4j2.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration>
+    <Properties>
+        <Property name="LOG_PATTERN">
+            %d{yyyy-MM-dd HH:mm:ss.SSS} --- thread_id="%tid" thread_name="%tn" thread_priority="%tp" --- [%p] %m%n
+        </Property>
+    </Properties>
+    <Appenders>
+        <RollingFile name="RollingName" filename="logs/app.log"
+                     filePattern="$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log">
+            <PatternLayout>
+                <Pattern>${LOG_PATTERN}</Pattern>
+            </PatternLayout>
+            <Policies>
+                <SizeBasedTriggeringPolicy size="20MB"/>
+            </Policies>
+        </RollingFile>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="${LOG_PATTERN}"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Logger name="com.baeldung.logging.log4j2threadinfo" level="trace">
+            <AppenderRef ref="Console"/>
+        </Logger>
+        <Root level="error">
+            <AppenderRef ref="RollingName"/>
+        </Root>
+    </Loggers>
+</Configuration>

maven-modules/maven-simple/maven-dependency/pom.xml

@@ -3,14 +3,13 @@
     xmlns="http://maven.apache.org/POM/4.0.0"
     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.baeldung</groupId>
     <artifactId>maven-dependency</artifactId>
     <version>1.0.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>maven-modules</artifactId>
+        <artifactId>maven-simple</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
@@ -19,7 +18,7 @@
             <dependency>
                 <groupId>org.apache.commons</groupId>
                 <artifactId>commons-lang3</artifactId>
-                <version>3.12.0</version>
+                <version>${commons-lang3.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>

maven-modules/maven-simple/parent-project/core/pom.xml

@@ -0,0 +1,16 @@
+<?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>org.baeldung</groupId>
+    <artifactId>core</artifactId>
+    <name>core</name>
+
+    <parent>
+        <artifactId>parent-project</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+</project>

maven-modules/maven-simple/parent-project/pom.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>parent-project</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>parent-project</name>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>maven-simple</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <modules>
+        <module>core</module>
+        <module>service</module>
+        <module>webapp</module>
+    </modules>
+</project>

maven-modules/maven-simple/parent-project/service/pom.xml

@@ -0,0 +1,16 @@
+<?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>org.baeldung</groupId>
+    <artifactId>service</artifactId>
+    <name>service</name>
+
+    <parent>
+        <artifactId>parent-project</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+</project>

maven-modules/maven-simple/parent-project/webapp/pom.xml

@@ -0,0 +1,16 @@
+<?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>org.baeldung</groupId>
+    <artifactId>webapp</artifactId>
+    <name>webapp</name>
+
+    <parent>
+        <artifactId>parent-project</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+</project>

maven-modules/maven-simple/plugin-management/pom.xml

@@ -4,11 +4,10 @@
     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>plugin-management</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <parent>
-        <artifactId>maven-modules</artifactId>
+        <artifactId>maven-simple</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>

maven-modules/maven-simple/pom.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<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>maven-simple</artifactId>
+    <name>maven-simple</name>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>maven-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <modules>
+        <module>maven-profiles</module>
+        <module>plugin-management</module>
+        <module>maven-dependency</module>
+        <module>parent-project</module>
+    </modules>
+
+</project>

maven-modules/pom.xml

@@ -22,7 +22,6 @@
         <module>maven-integration-test</module>
         <module>maven-multi-source</module>
         <module>maven-plugins</module>
-        <module>maven-profiles</module>
         <module>maven-properties</module>
         <!-- <module>maven-proxy</module> --> <!-- Not a maven project -->
         <module>maven-unused-dependencies</module>
@@ -34,10 +33,9 @@
         <module>maven-printing-plugins</module>
         <module>maven-builder-plugin</module>
         <module>host-maven-repo-example</module>
-        <module>plugin-management</module>
         <module>maven-surefire-plugin</module>
         <module>maven-parent-pom-resolution</module>
-        <module>maven-dependency</module>
+        <module>maven-simple</module>
     </modules>
 
     <dependencyManagement>

parent-boot-2/pom.xml

@@ -88,7 +88,7 @@
         <rest-assured.version>3.3.0</rest-assured.version>
         <!-- plugins -->
         <thin.version>1.0.22.RELEASE</thin.version>
-        <spring-boot.version>2.6.1</spring-boot.version>
+        <spring-boot.version>2.6.3</spring-boot.version>
         <aspectjweaver.version>1.9.1</aspectjweaver.version>
     </properties>
 

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

@@ -5,3 +5,4 @@
 - [How to Check if a Database Table Exists with JDBC](https://www.baeldung.com/jdbc-check-table-exists)
 - [Inserting Null Into an Integer Column Using JDBC](https://www.baeldung.com/jdbc-insert-null-into-integer-column)
 - [A Guide to Auto-Commit in JDBC](https://www.baeldung.com/java-jdbc-auto-commit)
+- [JDBC Connection Status](https://www.baeldung.com/jdbc-connection-status)

persistence-modules/core-java-persistence-2/src/main/java/com/baeldung/connectionstatus/ConnectionValidation.java

@@ -0,0 +1,65 @@
+package com.baeldung.connectionstatus;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public class ConnectionValidation
+{
+
+    public static Connection getConnection()
+            throws Exception
+    {
+        Class.forName("org.h2.Driver");
+        String url = "jdbc:h2:mem:testdb";
+        return DriverManager.getConnection(url, "user", "password");
+    }
+
+    public static void runIfOpened(Connection connection)
+            throws SQLException
+    {
+        if (connection != null && !connection.isClosed()) {
+            // run sql statements
+        }
+        else {
+            // handle closed connection
+        }
+    }
+
+    public static void runIfValid(Connection connection)
+            throws SQLException
+    {
+        // Try to validate connection with a 5 seconds timeout
+        if (connection.isValid(5)) {
+            // run sql statements
+        }
+        else {
+            // handle invalid connection
+        }
+    }
+
+    public static void runIfConnectionValid(Connection connection)
+    {
+        if (isConnectionValid(connection)) {
+            // run sql statements
+        }
+        else {
+            // handle invalid connection
+        }
+    }
+
+    public static boolean isConnectionValid(Connection connection)
+    {
+        try {
+            if (connection != null && !connection.isClosed()) {
+                // Running a simple validation query
+                connection.prepareStatement("SELECT 1");
+                return true;
+            }
+        }
+        catch (SQLException e) {
+            // log some useful data here
+        }
+        return false;
+    }
+}

persistence-modules/core-java-persistence-2/src/test/java/com/baeldung/connectionstatus/ConnectionValidationUnitTest.java

@@ -0,0 +1,38 @@
+package com.baeldung.connectionstatus;
+
+import org.junit.jupiter.api.Test;
+
+import java.sql.Connection;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ConnectionValidationUnitTest
+{
+    @Test
+    void givenConnectionObject_whenCreated_thenIsNotClosed()
+            throws Exception
+    {
+        Connection connection = ConnectionValidation.getConnection();
+        assertNotNull(connection);
+        assertFalse(connection.isClosed());
+    }
+
+    @Test
+    void givenConnectionObject_whenCreated_thenIsValid()
+            throws Exception
+    {
+        Connection connection = ConnectionValidation.getConnection();
+        assertTrue(connection.isValid(0));
+    }
+
+    @Test
+    void givenConnectionObject_whenValidated_thenIsValid()
+            throws Exception
+    {
+        Connection connection = ConnectionValidation.getConnection();
+        assertTrue(ConnectionValidation.isConnectionValid(connection));
+    }
+
+}

persistence-modules/java-mongodb/README.md

@@ -12,3 +12,4 @@ This module contains articles about MongoDB in Java.
 - [MongoDB Aggregations Using Java](https://www.baeldung.com/java-mongodb-aggregations)
 - [BSON to JSON Document Conversion in Java](https://www.baeldung.com/java-convert-bson-to-json)
 - [How to Check Field Existence in MongoDB?](https://www.baeldung.com/mongodb-check-field-exists)
+- [Get Last Inserted Document ID in MongoDB With Java Driver](https://www.baeldung.com/java-mongodb-last-inserted-id)

persistence-modules/spring-data-cassandra/src/test/java/com/baeldung/SpringContextTest.java

@@ -47,8 +47,8 @@ public class SpringContextTest {
     }
 
     @Before
-    public void createTable() throws InterruptedException, TTransportException, ConfigurationException, IOException {
+    public void createTable() {
-        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<String, Object>());
+        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<>());
     }
 
 	@Test

persistence-modules/spring-data-cassandra/src/test/java/com/baeldung/spring/data/cassandra/repository/BookRepositoryLiveTest.java

@@ -1,17 +1,15 @@
 package com.baeldung.spring.data.cassandra.repository;
 
-import static org.junit.Assert.assertEquals;
+import com.baeldung.spring.data.cassandra.config.CassandraConfig;
-import static org.junit.Assert.assertNotEquals;
-
-import java.io.IOException;
-import java.util.HashMap;
-
 import com.baeldung.spring.data.cassandra.model.Book;
+import com.datastax.driver.core.Cluster;
+import com.datastax.driver.core.Session;
+import com.datastax.driver.core.utils.UUIDs;
+import com.google.common.collect.ImmutableSet;
 import org.apache.cassandra.exceptions.ConfigurationException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.thrift.transport.TTransportException;
-import com.baeldung.spring.data.cassandra.config.CassandraConfig;
 import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
 import org.junit.After;
 import org.junit.AfterClass;
@@ -25,15 +23,24 @@ import org.springframework.data.cassandra.core.CassandraAdminOperations;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
-import com.datastax.driver.core.Cluster;
+import java.io.IOException;
-import com.datastax.driver.core.Session;
+import java.util.HashMap;
-import com.datastax.driver.core.utils.UUIDs;
-import com.google.common.collect.ImmutableSet;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+/**
+ * Live test for Cassandra testing.
+ *
+ * This can be converted to IntegrationTest once cassandra-unit tests can be executed in parallel and
+ * multiple test servers started as part of test suite.
+ *
+ * Open cassandra-unit issue for parallel execution: https://github.com/jsevellec/cassandra-unit/issues/155
+ */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = CassandraConfig.class)
-public class BookRepositoryIntegrationTest {
+public class BookRepositoryLiveTest {
-    private static final Log LOGGER = LogFactory.getLog(BookRepositoryIntegrationTest.class);
+    private static final Log LOGGER = LogFactory.getLog(BookRepositoryLiveTest.class);
 
     public static final String KEYSPACE_CREATION_QUERY = "CREATE KEYSPACE IF NOT EXISTS testKeySpace WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '3' };";
 
@@ -47,8 +54,6 @@ public class BookRepositoryIntegrationTest {
     @Autowired
     private CassandraAdminOperations adminTemplate;
 
-    //
-
     @BeforeClass
     public static void startCassandraEmbedded() throws InterruptedException, TTransportException, ConfigurationException, IOException {
         EmbeddedCassandraServerHelper.startEmbeddedCassandra();
@@ -62,8 +67,8 @@ public class BookRepositoryIntegrationTest {
     }
 
     @Before
-    public void createTable() throws InterruptedException, TTransportException, ConfigurationException, IOException {
+    public void createTable() {
-        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<String, Object>());
+        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<>());
     }
 
     @Test

persistence-modules/spring-data-cassandra/src/test/java/com/baeldung/spring/data/cassandra/repository/CassandraTemplateLiveTest.java

@@ -1,17 +1,13 @@
 package com.baeldung.spring.data.cassandra.repository;
 
-import static junit.framework.TestCase.assertNull;
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-
 import com.baeldung.spring.data.cassandra.config.CassandraConfig;
 import com.baeldung.spring.data.cassandra.model.Book;
+import com.datastax.driver.core.Cluster;
+import com.datastax.driver.core.Session;
+import com.datastax.driver.core.querybuilder.QueryBuilder;
+import com.datastax.driver.core.querybuilder.Select;
+import com.datastax.driver.core.utils.UUIDs;
+import com.google.common.collect.ImmutableSet;
 import org.apache.cassandra.exceptions.ConfigurationException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -30,17 +26,28 @@ import org.springframework.data.cassandra.core.CassandraOperations;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
-import com.datastax.driver.core.Cluster;
+import java.io.IOException;
-import com.datastax.driver.core.Session;
+import java.util.ArrayList;
-import com.datastax.driver.core.querybuilder.QueryBuilder;
+import java.util.HashMap;
-import com.datastax.driver.core.querybuilder.Select;
+import java.util.List;
-import com.datastax.driver.core.utils.UUIDs;
-import com.google.common.collect.ImmutableSet;
 
+import static junit.framework.TestCase.assertNull;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Live test for Cassandra testing.
+ *
+ * This can be converted to IntegrationTest once cassandra-unit tests can be executed in parallel and
+ * multiple test servers started as part of test suite.
+ *
+ * Open cassandra-unit issue for parallel execution: https://github.com/jsevellec/cassandra-unit/issues/155
+ */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = CassandraConfig.class)
-public class CassandraTemplateIntegrationTest {
+public class CassandraTemplateLiveTest {
-    private static final Log LOGGER = LogFactory.getLog(CassandraTemplateIntegrationTest.class);
+    private static final Log LOGGER = LogFactory.getLog(CassandraTemplateLiveTest.class);
 
     public static final String KEYSPACE_CREATION_QUERY = "CREATE KEYSPACE IF NOT EXISTS testKeySpace " + "WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '3' };";
 
@@ -54,8 +61,6 @@ public class CassandraTemplateIntegrationTest {
     @Autowired
     private CassandraOperations cassandraTemplate;
 
-    //
-
     @BeforeClass
     public static void startCassandraEmbedded() throws InterruptedException, TTransportException, ConfigurationException, IOException {
         EmbeddedCassandraServerHelper.startEmbeddedCassandra();
@@ -69,8 +74,8 @@ public class CassandraTemplateIntegrationTest {
     }
 
     @Before
-    public void createTable() throws InterruptedException, TTransportException, ConfigurationException, IOException {
+    public void createTable() {
-        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<String, Object>());
+        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<>());
     }
 
     @Test
@@ -111,7 +116,7 @@ public class CassandraTemplateIntegrationTest {
     }
 
     @Test
-    public void whenDeletingASelectedBook_thenNotAvailableOnRetrieval() throws InterruptedException {
+    public void whenDeletingASelectedBook_thenNotAvailableOnRetrieval() {
         final Book javaBook = new Book(UUIDs.timeBased(), "Head First Java", "OReilly Media", ImmutableSet.of("Computer", "Software"));
         cassandraTemplate.insert(javaBook);
         cassandraTemplate.delete(javaBook);

persistence-modules/spring-data-cassandra/src/test/java/com/baeldung/spring/data/cassandra/repository/CqlQueriesLiveTest.java

@@ -1,19 +1,16 @@
 package com.baeldung.spring.data.cassandra.repository;
 
-import static junit.framework.TestCase.assertEquals;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.UUID;
-
-import org.apache.cassandra.exceptions.ConfigurationException;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.thrift.transport.TTransportException;
 import com.baeldung.spring.data.cassandra.config.CassandraConfig;
 import com.baeldung.spring.data.cassandra.model.Book;
+import com.datastax.driver.core.Cluster;
+import com.datastax.driver.core.Session;
+import com.datastax.driver.core.querybuilder.Insert;
+import com.datastax.driver.core.querybuilder.QueryBuilder;
+import com.datastax.driver.core.querybuilder.Select;
+import com.datastax.driver.core.utils.UUIDs;
+import com.google.common.collect.ImmutableSet;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
 import org.junit.After;
 import org.junit.AfterClass;
@@ -28,18 +25,25 @@ import org.springframework.data.cassandra.core.CassandraOperations;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
-import com.datastax.driver.core.Cluster;
+import java.util.ArrayList;
-import com.datastax.driver.core.Session;
+import java.util.HashMap;
-import com.datastax.driver.core.querybuilder.Insert;
+import java.util.List;
-import com.datastax.driver.core.querybuilder.QueryBuilder;
+import java.util.UUID;
-import com.datastax.driver.core.querybuilder.Select;
-import com.datastax.driver.core.utils.UUIDs;
-import com.google.common.collect.ImmutableSet;
 
+import static junit.framework.TestCase.assertEquals;
+
+/**
+ * Live test for Cassandra testing.
+ *
+ * This can be converted to IntegrationTest once cassandra-unit tests can be executed in parallel and
+ * multiple test servers started as part of test suite.
+ *
+ * Open cassandra-unit issue for parallel execution: https://github.com/jsevellec/cassandra-unit/issues/155
+ */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = CassandraConfig.class)
-public class CqlQueriesIntegrationTest {
+public class CqlQueriesLiveTest {
-    private static final Log LOGGER = LogFactory.getLog(CqlQueriesIntegrationTest.class);
+    private static final Log LOGGER = LogFactory.getLog(CqlQueriesLiveTest.class);
 
     public static final String KEYSPACE_CREATION_QUERY = "CREATE KEYSPACE IF NOT EXISTS testKeySpace " + "WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '3' };";
 
@@ -53,10 +57,8 @@ public class CqlQueriesIntegrationTest {
     @Autowired
     private CassandraOperations cassandraTemplate;
 
-    //
-
     @BeforeClass
-    public static void startCassandraEmbedded() throws InterruptedException, TTransportException, ConfigurationException, IOException {
+    public static void startCassandraEmbedded() throws Exception {
         EmbeddedCassandraServerHelper.startEmbeddedCassandra(25000);
         final Cluster cluster = Cluster.builder().addContactPoints("127.0.0.1").withPort(9142).build();
         LOGGER.info("Server Started at 127.0.0.1:9142... ");
@@ -68,8 +70,8 @@ public class CqlQueriesIntegrationTest {
     }
 
     @Before
-    public void createTable() throws InterruptedException, TTransportException, ConfigurationException, IOException {
+    public void createTable() {
-        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<String, Object>());
+        adminTemplate.createTable(true, CqlIdentifier.cqlId(DATA_TABLE_NAME), Book.class, new HashMap<>());
     }
 
     @Test

persistence-modules/spring-data-jpa-filtering/pom.xml

@@ -67,6 +67,7 @@
         <start-class>com.baeldung.boot.Application</start-class>
         <testcontainers.postgresql.version>1.10.6</testcontainers.postgresql.version>
         <postgresql.version>42.2.5</postgresql.version>
+        <spring-boot.version>2.6.1</spring-boot.version> <!-- Temp downgrade due to spring-data-jpa issue. Fixing in JAVA-9857 -->
     </properties>
 
 </project>

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

@@ -124,7 +124,7 @@
     </build>
 
     <properties>
-        <spring-tx.version>5.3.13</spring-tx.version>
+        <spring-tx.version>5.3.15</spring-tx.version>
         <httpclient.version>4.5.2</httpclient.version>
         <reactor-core.version>3.3.1.RELEASE</reactor-core.version>
         <embed.mongo.version>3.2.6</embed.mongo.version>

persistence-modules/spring-mybatis/pom.xml

@@ -78,7 +78,7 @@
 
     <properties>
         <!-- Spring -->
-        <org.springframework.version>5.3.13</org.springframework.version>
+        <org.springframework.version>5.3.15</org.springframework.version>
         <!-- persistence -->
         <spring-mybatis.version>2.0.6</spring-mybatis.version>
         <mybatis.version>3.5.2</mybatis.version>

pom.xml

@@ -353,7 +353,7 @@
                 <module>apache-cxf</module>
                 <module>apache-kafka</module>
                 <module>apache-libraries</module>
-                <module>apache-olingo/olingo2</module>
+                <module>apache-olingo</module>
                 <module>apache-poi</module>
                 <module>apache-rocketmq</module>
                 <module>apache-shiro</module>
@@ -839,7 +839,7 @@
                 <module>apache-cxf</module>
                 <module>apache-kafka</module>
                 <module>apache-libraries</module>
-                <module>apache-olingo/olingo2</module>
+                <module>apache-olingo</module>
                 <module>apache-poi</module>
                 <module>apache-rocketmq</module>
                 <module>apache-shiro</module>

quarkus-vs-springboot/quarkus-project/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar

quarkus-vs-springboot/quarkus-project/mvnw

@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

quarkus-vs-springboot/quarkus-project/mvnw.cmd

@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

quarkus-vs-springboot/spring-project/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,18 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+# 
+#   http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar

quarkus-vs-springboot/spring-project/mvnw

@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

quarkus-vs-springboot/spring-project/mvnw.cmd

@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

quarkus-vs-springboot/spring-project/src/main/resources/application.properties

@@ -1,4 +1,4 @@
-spring.r2dbc.url=${DB_URL:'r2dbc:postgresql://localhost:5432/postgres'}
+spring.r2dbc.url=${DB_URL:r2dbc:postgresql://localhost:5432/postgres}
 spring.r2dbc.username=postgres
 spring.r2dbc.password=example
 spring.r2dbc.pool.enabled=true

spring-4/pom.xml

@@ -74,10 +74,12 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-api</artifactId>
+            <version>${log4j2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
+            <version>${log4j2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.easymock</groupId>
@@ -115,6 +117,7 @@
         <easymock.version>3.6</easymock.version>
         <hsqldb.version>2.4.0</hsqldb.version>
         <hikaricp.version>4.0.3</hikaricp.version>
+        <log4j2.version>2.17.1</log4j2.version>
     </properties>
 
 </project>

spring-5-autowiring-beans/pom.xml

@@ -0,0 +1,24 @@
+<?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>spring-5-autowiring-beans</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>spring-5-autowiring-beans</name>
+
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parent-boot-2</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+		<relativePath>../parent-boot-2</relativePath>
+	</parent>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+	</dependencies>
+
+</project>

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/App.java

@@ -0,0 +1,14 @@
+package com.baeldung.autowiring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+public class App {
+
+    public static void main(String[] args) {
+        SpringApplication.run(App.class, args);
+    }
+
+}

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/controller/CorrectController.java

@@ -0,0 +1,18 @@
+package com.baeldung.autowiring.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+
+import com.baeldung.autowiring.service.MyService;
+
+@Controller
+public class CorrectController {
+    
+    @Autowired
+    MyService myService;
+    
+    public String control() {
+        return myService.serve();
+    }
+
+}

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/controller/FlawedController.java

@@ -0,0 +1,15 @@
+package com.baeldung.autowiring.controller;
+
+import org.springframework.stereotype.Controller;
+
+import com.baeldung.autowiring.service.MyService;
+
+@Controller
+public class FlawedController {
+    
+    public String control() {
+        MyService userService = new MyService();
+        return userService.serve();
+    }
+
+}

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/service/MyComponent.java

@@ -0,0 +1,10 @@
+package com.baeldung.autowiring.service;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class MyComponent {
+
+    public void doWork() {}
+    
+}

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/service/MyService.java

@@ -0,0 +1,19 @@
+package com.baeldung.autowiring.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+
+/**
+ * The bean corresponding to this class is defined in MyServiceConfiguration
+ * Alternatively, you could choose to decorate this class with @Component or @Service
+ */
+public class MyService {
+    
+    @Autowired
+    MyComponent myComponent;
+    
+    public String serve() {
+        myComponent.doWork();
+        return "success";
+    }
+
+}

spring-5-autowiring-beans/src/main/java/com/baeldung/autowiring/service/MyServiceConfiguration.java

@@ -0,0 +1,14 @@
+package com.baeldung.autowiring.service;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MyServiceConfiguration {
+
+    @Bean
+    MyService myService() {
+        return new MyService();
+    }
+    
+}

spring-5-autowiring-beans/src/test/java/com/baeldung/autowiring/controller/CorrectControllerIntegrationTest.java

@@ -0,0 +1,23 @@
+package com.baeldung.autowiring.controller;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest
+public class CorrectControllerIntegrationTest {
+    
+    @Autowired
+    CorrectController controller;
+    
+    @Test
+    void whenControl_ThenRunSuccessfully() {
+        assertDoesNotThrow(() -> controller.control());
+    }
+    
+}

spring-5-autowiring-beans/src/test/java/com/baeldung/autowiring/controller/FlawedControllerIntegrationTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.autowiring.controller;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest
+public class FlawedControllerIntegrationTest {
+    
+    private static final Logger LOGGER = LoggerFactory.getLogger(FlawedControllerIntegrationTest.class);
+    
+    @Autowired
+    FlawedController myController;
+
+    @Test
+    void whenControl_ThenThrowNullPointerException() {
+        NullPointerException npe = assertThrows(NullPointerException.class, () -> myController.control());
+        LOGGER.error("Got a NullPointerException", npe);
+    }
+
+}