JMeter example source code file (MemoryBenchmark.java)

This example JMeter source code file (MemoryBenchmark.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

get, jvm, k, linkedlist, list, memorybenchmark, monitormodel, monitormodel, objectfactory, status, status, system, system, util, workers

The JMeter MemoryBenchmark.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.monitor.util;

import java.util.List;
import java.util.LinkedList;
import org.apache.jmeter.monitor.model.*;
import org.apache.jmeter.visualizers.*;

/**
 *
 * @version $Revision: 959057 $
 */
public class MemoryBenchmark {

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static void main(String[] args) {
        if (args.length == 1) {
            int objects = 10000;
            if (args[0] != null) {
                objects = Integer.parseInt(args[0]);
            }
            List objs = new LinkedList();
            ObjectFactory of = ObjectFactory.getInstance();

            long bfree = Runtime.getRuntime().freeMemory();
            long btotal = Runtime.getRuntime().totalMemory();
            long bmax = Runtime.getRuntime().maxMemory();
            System.out.println("Before we create objects:");
            System.out.println("------------------------------");
            System.out.println("free: " + bfree);
            System.out.println("total: " + btotal);
            System.out.println("max: " + bmax);

            for (int idx = 0; idx < objects; idx++) {
                Connector cnn = of.createConnector();
                Workers wkrs = of.createWorkers();
                for (int idz = 0; idz < 26; idz++) {
                    Worker wk0 = of.createWorker();
                    wk0.setCurrentQueryString("/manager/status");
                    wk0.setCurrentUri("http://localhost/manager/status");
                    wk0.setMethod("GET");
                    wk0.setProtocol("http");
                    wk0.setRemoteAddr("?");
                    wk0.setRequestBytesReceived(132);
                    wk0.setRequestBytesSent(18532);
                    wk0.setStage("K");
                    wk0.setVirtualHost("?");
                    wkrs.getWorker().add(wk0);
                }
                cnn.setWorkers(wkrs);

                RequestInfo rqinfo = of.createRequestInfo();
                rqinfo.setBytesReceived(0);
                rqinfo.setBytesSent(434374);
                rqinfo.setErrorCount(10);
                rqinfo.setMaxTime(850);
                rqinfo.setProcessingTime(2634);
                rqinfo.setRequestCount(1002);
                cnn.setRequestInfo(rqinfo);

                ThreadInfo thinfo = of.createThreadInfo();
                thinfo.setCurrentThreadCount(50);
                thinfo.setCurrentThreadsBusy(12);
                thinfo.setMaxSpareThreads(50);
                thinfo.setMaxThreads(150);
                thinfo.setMinSpareThreads(10);
                cnn.setThreadInfo(thinfo);

                Jvm vm = of.createJvm();
                Memory mem = of.createMemory();
                mem.setFree(77280);
                mem.setTotal(134210000);
                mem.setMax(134217728);
                vm.setMemory(mem);

                Status st = of.createStatus();
                st.setJvm(vm);
                st.getConnector().add(cnn);

                MonitorStats mstats = new MonitorStats(Stats.calculateStatus(st), Stats.calculateLoad(st), 0, Stats
                        .calculateMemoryLoad(st), Stats.calculateThreadLoad(st), "localhost", "8080", "http", System
                        .currentTimeMillis());
                MonitorModel monmodel = new MonitorModel(mstats);
                objs.add(monmodel);
            }
            long afree = Runtime.getRuntime().freeMemory();
            long atotal = Runtime.getRuntime().totalMemory();
            long amax = Runtime.getRuntime().maxMemory();
            long delta = ((atotal - afree) - (btotal - bfree));
            System.out.println("After we create objects:");
            System.out.println("------------------------------");
            System.out.println("free: " + afree);
            System.out.println("total: " + atotal);
            System.out.println("max: " + amax);
            System.out.println("------------------------------");
            System.out.println("delta: " + (delta / 1024) + " kilobytes");
            System.out.println("delta: " + (delta / 1024 / 1024) + " megabytes");
            System.out.println("number of objects: " + objects);
            System.out.println("potential number of servers: " + (objects / 1000));

        } else {
            System.out.println("Please provide the number of objects");
        }
    }
}