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ActiveMQ example source code file (BenchmarkSupport.java)

This example ActiveMQ source code file (BenchmarkSupport.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 - ActiveMQ tags/keywords

activemqconnectionfactory, activemqconnectionfactory, atomicinteger, atomicinteger, benchmarksupport, destination, destination, idgenerator, jmsexception, k, session, string, string, text, thread, util

The ActiveMQ BenchmarkSupport.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.activemq.benchmark;

import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.util.IdGenerator;

/**
 * Abstract base class for some simple benchmark tools
 * 
 * @author James Strachan
 * 
 */
public class BenchmarkSupport {

    protected int connectionCount = 1;
    protected int batch = 1000;
    protected Destination destination;
    protected String[] subjects;

    private boolean topic = true;
    private boolean durable;
    private ActiveMQConnectionFactory factory;
    private String url;
    private int counter;
    private List<Object> resources = new ArrayList();
    private NumberFormat formatter = NumberFormat.getInstance();
    private AtomicInteger connectionCounter = new AtomicInteger(0);
    private IdGenerator idGenerator = new IdGenerator();
    private boolean timerLoop;

    public BenchmarkSupport() {
    }

    public void start() {
        System.out.println("Using: " + connectionCount + " connection(s)");
        subjects = new String[connectionCount];
        for (int i = 0; i < connectionCount; i++) {
            subjects[i] = "BENCHMARK.FEED" + i;
        }
        if (useTimerLoop()) {
            Thread timer = new Thread() {
                public void run() {
                    timerLoop();
                }
            };
            timer.start();
        }
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public boolean isTopic() {
        return topic;
    }

    public void setTopic(boolean topic) {
        this.topic = topic;
    }

    public ActiveMQConnectionFactory getFactory() {
        return factory;
    }

    public void setFactory(ActiveMQConnectionFactory factory) {
        this.factory = factory;
    }

    public void setSubject(String subject) {
        connectionCount = 1;
        subjects = new String[] {
            subject
        };
    }

    public boolean isDurable() {
        return durable;
    }

    public void setDurable(boolean durable) {
        this.durable = durable;
    }

    public int getConnectionCount() {
        return connectionCount;
    }

    public void setConnectionCount(int connectionCount) {
        this.connectionCount = connectionCount;
    }

    protected Session createSession() throws JMSException {
        if (factory == null) {
            factory = createFactory();
        }
        Connection connection = factory.createConnection();
        int value = connectionCounter.incrementAndGet();
        System.out.println("Created connection: " + value + " = " + connection);
        if (durable) {
            connection.setClientID(idGenerator.generateId());
        }
        addResource(connection);
        connection.start();

        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        addResource(session);
        return session;
    }

    protected ActiveMQConnectionFactory createFactory() {
        ActiveMQConnectionFactory answer = new ActiveMQConnectionFactory(getUrl());
        return answer;
    }

    protected synchronized void count(int count) {
        counter += count;
        /*
         * if (counter > batch) { counter = 0; long current =
         * System.currentTimeMillis(); double end = current - time; end /= 1000;
         * time = current; System.out.println("Processed " + batch + " messages
         * in " + end + " (secs)"); }
         */
    }

    protected synchronized int resetCount() {
        int answer = counter;
        counter = 0;
        return answer;
    }

    protected void timerLoop() {
        int times = 0;
        int total = 0;
        int dumpVmStatsFrequency = 10;
        Runtime runtime = Runtime.getRuntime();

        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            int processed = resetCount();
            double average = 0;
            if (processed > 0) {
                total += processed;
                times++;
            }
            if (times > 0) {
                average = total / (double) times;
            }

            System.out.println(getClass().getName() + " Processed: " + processed + " messages this second. Average: " + average);

            if ((times % dumpVmStatsFrequency) == 0 && times != 0) {
                System.out.println("Used memory: " + asMemoryString(runtime.totalMemory() - runtime.freeMemory()) + " Free memory: " + asMemoryString(runtime.freeMemory()) + " Total memory: "
                                   + asMemoryString(runtime.totalMemory()) + " Max memory: " + asMemoryString(runtime.maxMemory()));
            }

        }
    }

    protected String asMemoryString(long value) {
        return formatter.format(value / 1024) + " K";
    }

    protected boolean useTimerLoop() {
        return timerLoop;
    }

    protected Destination createDestination(Session session, String subject) throws JMSException {
        if (topic) {
            return session.createTopic(subject);
        } else {
            return session.createQueue(subject);
        }
    }

    protected void addResource(Object resource) {
        resources.add(resource);
    }

    public int getCounter() {
        return counter;
    }

    public void setTimerLoop(boolean timerLoop) {
        this.timerLoop = timerLoop;
    }

    protected static boolean parseBoolean(String text) {
        return text.equalsIgnoreCase("true");
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ BenchmarkSupport.java source code file:

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