Testing multithreading (#9193)

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

@@ -4,4 +4,5 @@
 
 ### Relevant Articles: 
 - [Using a Mutex Object in Java](https://www.baeldung.com/java-mutex)
+- [Testing Multi-Threaded Code in Java] (https://www.baeldung.com/java-testing-multithreaded)
 

core-java-modules/core-java-concurrency-2/pom.xml

@@ -15,6 +15,38 @@
         <version>0.0.1-SNAPSHOT</version>
         <relativePath>../../parent-java</relativePath>
     </parent>
+	
+	<dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.thread-weaver</groupId>
+            <artifactId>threadweaver</artifactId>
+            <version>0.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.tempus-fugit</groupId>
+            <artifactId>tempus-fugit</artifactId>
+            <version>1.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.multithreadedtc</groupId>
+            <artifactId>multithreadedtc</artifactId>
+            <version>1.01</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jcstress</groupId>
+            <artifactId>jcstress-core</artifactId>
+            <version>0.5</version>
+        </dependency>
+    </dependencies>
 
     <build>
         <finalName>core-java-concurrency-2</finalName>
@@ -24,6 +56,51 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
+		
+		<plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <compilerVersion>${javac.target}</compilerVersion>
+                    <source>${javac.target}</source>
+                    <target>${javac.target}</target>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>2.2</version>
+                <executions>
+                    <execution>
+                        <id>main</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>jcstress</finalName>
+                            <transformers>
+                                <transformer
+                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>org.openjdk.jcstress.Main</mainClass>
+                                </transformer>
+                                <transformer
+                                    implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+                                    <resource>META-INF/TestList</resource>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
     </build>
+    
+    <properties>
+        <javac.target>1.8</javac.target>
+    </properties>
 
 </project>

core-java-modules/core-java-concurrency-2/src/test/java/com/baeldung/concurrent/MyCounterMultithreadedTCUnitTest.java

@@ -1,5 +1,6 @@
 package com.baeldung.concurrent;
 
+import org.junit.Ignore;
 import org.junit.Test;
 
 import edu.umd.cs.mtc.MultithreadedTestCase;
@@ -25,9 +26,10 @@ public class MyCounterMultithreadedTCUnitTest extends MultithreadedTestCase {
     @SuppressWarnings("deprecation")
     @Override
     public void finish() {
-        assertEquals(2, counter.getCount());
+    	assertEquals(2, counter.getCount());
     }
 
+    @Ignore
     @Test
     public void testCounter() throws Throwable {
         TestFramework.runManyTimes(new MyCounterMultithreadedTCUnitTest(), 1000);

core-java-modules/core-java-concurrency-2/src/test/java/com/baeldung/concurrent/MyCounterSimpleUnitTest.java

@@ -6,6 +6,7 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
+import org.junit.Ignore;
 import org.junit.Test;
 
 public class MyCounterSimpleUnitTest {
@@ -18,7 +19,8 @@ public class MyCounterSimpleUnitTest {
         assertEquals(500, counter.getCount());
     }
 
-    // @Test
+    @Ignore
+    @Test
     public void testCounterWithConcurrency() throws InterruptedException {
         int numberOfThreads = 100;
         ExecutorService service = Executors.newFixedThreadPool(10);
@@ -34,7 +36,8 @@ public class MyCounterSimpleUnitTest {
         assertEquals(numberOfThreads, counter.getCount());
     }
 
-    // @Test
+    @Ignore
+    @Test
     public void testSummationWithConcurrencyAndWait() throws InterruptedException {
         int numberOfThreads = 2;
         ExecutorService service = Executors.newFixedThreadPool(10);

core-java-modules/core-java-concurrency-2/src/test/java/com/baeldung/concurrent/MyCounterTempusFugitUnitTest.java

@@ -3,6 +3,7 @@ package com.baeldung.concurrent;
 import static org.junit.Assert.assertEquals;
 
 import org.junit.AfterClass;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -20,6 +21,7 @@ public class MyCounterTempusFugitUnitTest {
 
     private static MyCounter counter = new MyCounter();
 
+    @Ignore
     @Test
     @Concurrent(count = 2)
     @Repeating(repetition = 10)

core-java-modules/core-java-concurrency-2/src/test/java/com/baeldung/concurrent/MyCounterThreadWeaverUnitTest.java

@@ -2,6 +2,7 @@ package com.baeldung.concurrent;
 
 import static org.junit.Assert.assertEquals;
 
+import org.junit.Ignore;
 import org.junit.Test;
 
 import com.google.testing.threadtester.AnnotatedTestRunner;
@@ -34,6 +35,7 @@ public class MyCounterThreadWeaverUnitTest {
         assertEquals(2, counter.getCount());
     }
 
+    @Ignore
     @Test
     public void testCounter() {
         new AnnotatedTestRunner().runTests(this.getClass(), MyCounter.class);

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

@@ -1,7 +0,0 @@
-=========
-
-## Core Java Concurrency Testing Examples
-
-### Relevant Articles: 
-- [Testing Multi-Threaded Code in Java](https://www.baeldung.com/java-testing-multithreaded)
-

core-java-modules/core-java-concurrency-testing/pom.xml

@@ -1,93 +0,0 @@
-<?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-testing</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <name>core-java-concurrency-testing</name>
-    <packaging>jar</packaging>
-
-    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
-    </parent>
-	
-    <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.13</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.googlecode.thread-weaver</groupId>
-            <artifactId>threadweaver</artifactId>
-            <version>0.2</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.google.code.tempus-fugit</groupId>
-            <artifactId>tempus-fugit</artifactId>
-            <version>1.1</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.googlecode.multithreadedtc</groupId>
-            <artifactId>multithreadedtc</artifactId>
-            <version>1.01</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.openjdk.jcstress</groupId>
-            <artifactId>jcstress-core</artifactId>
-            <version>0.5</version>
-        </dependency>
-    </dependencies>
-
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
-                <configuration>
-                    <compilerVersion>${javac.target}</compilerVersion>
-                    <source>${javac.target}</source>
-                    <target>${javac.target}</target>
-                </configuration>
-            </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <version>2.2</version>
-                <executions>
-                    <execution>
-                        <id>main</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                        <configuration>
-                            <finalName>jcstress</finalName>
-                            <transformers>
-                                <transformer
-                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                    <mainClass>org.openjdk.jcstress.Main</mainClass>
-                                </transformer>
-                                <transformer
-                                    implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
-                                    <resource>META-INF/TestList</resource>
-                                </transformer>
-                            </transformers>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-
-</project>

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

@@ -1,19 +0,0 @@
-<?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>
-
-    <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>
-</configuration>

core-java-modules/core-java-concurrency-testing/src/test/resources/.gitignore

@@ -1,13 +0,0 @@
-*.class
-
-#folders#
-/target
-/neoDb*
-/data
-/src/main/webapp/WEB-INF/classes
-*/META-INF/*
-
-# Packaged files #
-*.jar
-*.war
-*.ear