[BAEL-3845] Add JMeter test script (#16276)

* Add JMeter test script

* Address review comments

* Address review comments

* Refactor large method into smaller parts

---------

Co-authored-by: rajatgarg <rajatgarg@adobe.com>

testing-modules/jmeter/pom.xml

@@ -37,6 +37,17 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-security</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.apache.jmeter</groupId>
+            <artifactId>ApacheJMeter_core</artifactId>
+            <version>5.4.1</version>
+        </dependency>
+        <!-- Apache JMeter HTTP -->
+        <dependency>
+            <groupId>org.apache.jmeter</groupId>
+            <artifactId>ApacheJMeter_http</artifactId>
+            <version>5.4.1</version>
+        </dependency>
     </dependencies>
 
     <build>

testing-modules/jmeter/src/main/resources/jmeter.properties

@@ -0,0 +1 @@
+jmeter.save.saveservice.output_format=xml

testing-modules/jmeter/src/test/java/com/baeldung/jmeterscript/JMeterLiveTest.java

@@ -0,0 +1,116 @@
+package com.baeldung.jmeterscript;
+
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Objects;
+
+import org.apache.jmeter.control.gui.LoopControlPanel;
+import org.apache.jmeter.control.gui.TestPlanGui;
+import org.apache.jmeter.engine.StandardJMeterEngine;
+import org.apache.jmeter.protocol.http.control.gui.HttpTestSampleGui;
+import org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy;
+import org.apache.jmeter.reporters.ResultCollector;
+import org.apache.jmeter.reporters.Summariser;
+import org.apache.jmeter.save.SaveService;
+import org.apache.jmeter.testelement.TestElement;
+import org.apache.jmeter.testelement.TestPlan;
+import org.apache.jmeter.threads.ThreadGroup;
+import org.apache.jmeter.control.LoopController;
+import org.apache.jmeter.threads.gui.ThreadGroupGui;
+import org.apache.jmeter.util.JMeterUtils;
+import org.apache.jorphan.collections.HashTree;
+import org.junit.jupiter.api.Test;
+
+/**
+ * This is a Live Test so that JMETER_HOME Environment variable will be available to run this test.
+ */
+public class JMeterLiveTest {
+
+    @Test
+    void givenJMeterScript_whenUsingCode_thenExecuteViaJavaProgram() throws IOException {
+        String jmeterHome = System.getenv("JMETER_HOME");
+        if (jmeterHome == null) {
+            throw new RuntimeException("JMETER_HOME environment variable is not set.");
+        }
+
+        String file = Objects.requireNonNull(JMeterLiveTest.class.getClassLoader().getResource("jmeter.properties")).getFile();
+        JMeterUtils.setJMeterHome(jmeterHome);
+
+        JMeterUtils.loadJMeterProperties(file);
+        JMeterUtils.initLocale();
+
+        StandardJMeterEngine jmeter = new StandardJMeterEngine();
+
+        HTTPSamplerProxy httpSampler = getHttpSamplerProxy();
+
+        LoopController loopController = getLoopController();
+
+        ThreadGroup threadGroup = getThreadGroup(loopController);
+
+        TestPlan testPlan = getTestPlan(threadGroup);
+
+        HashTree testPlanTree = new HashTree();
+        HashTree threadGroupHashTree = testPlanTree.add(testPlan, threadGroup);
+        threadGroupHashTree.add(httpSampler);
+
+        SaveService.saveTree(testPlanTree, Files.newOutputStream(Paths.get("script.jmx")));
+        Summariser summer = null;
+        String summariserName = JMeterUtils.getPropDefault("summariser.name", "summary");
+        if (summariserName.length() > 0) {
+            summer = new Summariser(summariserName);
+        }
+
+        String logFile = "output-logs.jtl";
+        ResultCollector logger = new ResultCollector(summer);
+        logger.setFilename(logFile);
+        testPlanTree.add(testPlanTree.getArray()[0], logger);
+
+        jmeter.configure(testPlanTree);
+        jmeter.run();
+
+        System.out.println("Test completed. See output-logs.jtl file for results");
+        System.out.println("JMeter .jmx script is available at script.jmx");
+    }
+
+    private static TestPlan getTestPlan(ThreadGroup threadGroup) {
+        TestPlan testPlan = new TestPlan("Sample Test Plan");
+        testPlan.setProperty(TestElement.TEST_CLASS, TestPlan.class.getName());
+        testPlan.setProperty(TestElement.GUI_CLASS, TestPlanGui.class.getName());
+        testPlan.addThreadGroup(threadGroup);
+        return testPlan;
+    }
+
+    private static ThreadGroup getThreadGroup(LoopController loopController) {
+        ThreadGroup threadGroup = new ThreadGroup();
+        threadGroup.setName("Sample Thread Group");
+        threadGroup.setNumThreads(10);
+        threadGroup.setRampUp(5);
+        threadGroup.setSamplerController(loopController);
+        threadGroup.setProperty(TestElement.TEST_CLASS, ThreadGroup.class.getName());
+        threadGroup.setProperty(TestElement.GUI_CLASS, ThreadGroupGui.class.getName());
+        return threadGroup;
+    }
+
+    private static LoopController getLoopController() {
+        LoopController loopController = new LoopController();
+        loopController.setLoops(1);
+        loopController.setFirst(true);
+        loopController.setProperty(TestElement.TEST_CLASS, LoopController.class.getName());
+        loopController.setProperty(TestElement.GUI_CLASS, LoopControlPanel.class.getName());
+        loopController.initialize();
+        return loopController;
+    }
+
+    private static HTTPSamplerProxy getHttpSamplerProxy() {
+        HTTPSamplerProxy httpSampler = new HTTPSamplerProxy();
+        httpSampler.setDomain("www.google.com");
+        httpSampler.setPort(80);
+        httpSampler.setPath("/");
+        httpSampler.setMethod("GET");
+        httpSampler.setProperty(TestElement.TEST_CLASS, HTTPSamplerProxy.class.getName());
+        httpSampler.setProperty(TestElement.GUI_CLASS, HttpTestSampleGui.class.getName());
+        return httpSampler;
+    }
+}