gistfile1.txt

package org.apache.activemq.advisory;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.transport.TransportListener;
import org.apache.activemq.transport.tcp.TcpTransport;

import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TemporaryQueue;
import java.io.IOException;

public class LoadGenerator {
    public static void main(String[] args) throws Exception {

        String action = args[0];
        String url = args[1];

        if ("generate".equals(action)) {

            System.out.println("Connecting to: " + url);
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(url);
            ActiveMQConnection connection = (ActiveMQConnection) factory.createConnection();
            connection.setWatchTopicAdvisories(false);
            connection.start();
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            System.out.println("Connected. Generating load...");
            int i = 0;
            while (true) {
                i++;
                System.out.print(".");
                TemporaryQueue queue = session.createTemporaryQueue();
                MessageConsumer consumer = session.createConsumer(queue);
                consumer.close();
                queue.delete();
            }

        } else if ("slow".equals(action)) {

            System.out.println("Connecting to: " + url);
            ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(url);
            ActiveMQConnection connection = (ActiveMQConnection) factory.createConnection();
            TcpTransport t = connection.getTransport().narrow(TcpTransport.class);

            // Hook in transport a listener that slows down command processing.
            final TransportListener actual = t.getTransportListener();
            t.setTransportListener(new TransportListener() {
                public void onCommand(Object command) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                    }
                    actual.onCommand(command);
                }
                @Override
                public void onException(IOException error) {
                    actual.onException(error);
                }
                @Override
                public void transportInterupted() {
                    actual.transportInterupted();
                }
                @Override
                public void transportResumed() {
                    actual.transportResumed();
                }
            });
            connection.start();
            System.out.println("Connected. Behaving like a slow advisory consumer.");
            while(true) {
                Thread.sleep(100000);
            }

        } else {
            System.err.print("Invalid usage: unknown action: " + action);
        }

    }
}