JMeter example source code file (ClientJMeterEngine.java)

This example JMeter source code file (ClientJMeterEngine.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

could, could, exception, malformedurlexception, net, network, non-nls-1, non-nls-1, object, precompiler, remoteexception, remoteexception, remotejmeterengine, remotejmeterengine, remoteobject, rmi, string, util

The JMeter ClientJMeterEngine.java source code

/*
 * 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.
 *
 */

package org.apache.jmeter.engine;

import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.server.RemoteObject;
import java.util.Properties;

import org.apache.jmeter.testelement.TestListener;
import org.apache.jmeter.threads.JMeterContextService;
import org.apache.jorphan.collections.HashTree;
import org.apache.jorphan.collections.SearchByClass;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * Class to run remote tests from the client JMeter and collect remote samples
 */
public class ClientJMeterEngine implements JMeterEngine, Runnable {
    private static final Logger log = LoggingManager.getLoggerForClass();

    private static final Object LOCK = new Object();

    private RemoteJMeterEngine remote;

    private HashTree test;

    private final String host;

    private static RemoteJMeterEngine getEngine(String h) throws MalformedURLException, RemoteException,
            NotBoundException {
       final String name = "//" + h + "/" + RemoteJMeterEngineImpl.JMETER_ENGINE_RMI_NAME; // $NON-NLS-1$ $NON-NLS-2$
       Remote remobj = Naming.lookup(name);
       if (remobj instanceof RemoteJMeterEngine){
           final RemoteJMeterEngine rje = (RemoteJMeterEngine) remobj;
           if (remobj instanceof RemoteObject){
               RemoteObject robj = (RemoteObject) remobj;
               System.out.println("Using remote object: "+robj.getRef().remoteToString());
           }
           return rje;
       }
       throw new RemoteException("Could not find "+name);
    }

    public ClientJMeterEngine(String host) throws MalformedURLException, NotBoundException, RemoteException {
        this.remote = getEngine(host);
        this.host = host;
    }

    /** {@inheritDoc} */
    public void configure(HashTree testTree) {
        TreeCloner cloner = new TreeCloner(false);
        testTree.traverse(cloner);
        test = cloner.getClonedTree();
    }

    /** {@inheritDoc} */
    public void runTest() {
        log.info("about to run remote test on "+host);
        new Thread(this).start();
        log.info("done initiating run command");
    }

    /** {@inheritDoc} */
    public void stopTest() {
        log.info("about to stop remote test on "+host);
        try {
            remote.stopTest();
        } catch (Exception ex) {
            log.error("", ex); // $NON-NLS-1$
        }
    }

    /** {@inheritDoc} */
    public void reset() {
        try {
            try {
                remote.reset();
            } catch (java.rmi.ConnectException e) {
                remote = getEngine(host);
                remote.reset();
            }
        } catch (Exception ex) {
            log.error("", ex); // $NON-NLS-1$
        }
    }

    /** {@inheritDoc} */
    public void run() {
        log.info("running clientengine run method");
        SearchByClass<TestListener> testListeners = new SearchByClass(TestListener.class);
        ConvertListeners sampleListeners = new ConvertListeners();
        HashTree testTree = test;
        PreCompiler compiler = new PreCompiler(true); // limit the changes to client only test elements
        synchronized(testTree) {
            testTree.traverse(compiler);
            testTree.traverse(new TurnElementsOn());
            testTree.traverse(testListeners);
            testTree.traverse(sampleListeners);
        }

        try {
            JMeterContextService.startTest();
            /*
             * Add fix for Deadlocks, see:
             * 
             * See https://issues.apache.org/bugzilla/show_bug.cgi?id=48350
            */
            synchronized(LOCK)
            {
                remote.configure(testTree, host);
            }
            log.info("sent test to " + host);
            if (savep != null){
                log.info("Sending properties "+savep);
                try {
                    remote.setProperties(savep);
                } catch (RemoteException e) {
                    log.warn("Could not set properties: " + e.toString());
                }
            }
            remote.runTest();
            log.info("sent run command to "+ host);
        } catch (Exception ex) {
            log.error("", ex); // $NON-NLS-1$
        }
    }

    /** {@inheritDoc} */
    public void exit() {
        log.info("about to exit remote server on "+host);
        try {
            remote.exit();
        } catch (RemoteException e) {
            log.warn("Could not perform remote exit: " + e.toString());
        }
    }

    private Properties savep;
    /** {@inheritDoc} */
    public void setProperties(Properties p) {
        savep = p;
        // Sent later
    }
}