Publisher.java example

Explorer
activemq-master
/**
 * 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 example;

import org.apache.qpid.jms.*;
import javax.jms.*;

class Publisher {

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

        final String TOPIC_PREFIX = "topic://";

        String user = env("ACTIVEMQ_USER", "admin");
        String password = env("ACTIVEMQ_PASSWORD", "password");
        String host = env("ACTIVEMQ_HOST", "localhost");
        int port = Integer.parseInt(env("ACTIVEMQ_PORT", "5672"));

        String connectionURI = "amqp://" + host + ":" + port;
        String destinationName = arg(args, 0, "topic://event");

        int messages = 10000;
        int size = 256;

        String DATA = "abcdefghijklmnopqrstuvwxyz";
        String body = "";
        for (int i = 0; i < size; i++) {
            body += DATA.charAt(i % DATA.length());
        }

        JmsConnectionFactory factory = new JmsConnectionFactory(connectionURI);

        Connection connection = factory.createConnection(user, password);
        connection.start();

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

        Destination destination = null;
        if (destinationName.startsWith(TOPIC_PREFIX)) {
            destination = session.createTopic(destinationName.substring(TOPIC_PREFIX.length()));
        } else {
            destination = session.createQueue(destinationName);
        }

        MessageProducer producer = session.createProducer(destination);
        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);

        for (int i = 1; i <= messages; i++) {
            TextMessage msg = session.createTextMessage("#:" + i);
            msg.setIntProperty("id", i);
            producer.send(msg);
            if ((i % 1000) == 0) {
                System.out.println(String.format("Sent %d messages", i));
            }
        }

        producer.send(session.createTextMessage("SHUTDOWN"));
        Thread.sleep(1000 * 3);
        connection.close();
        System.exit(0);
    }

    private static String env(String key, String defaultValue) {
        String rc = System.getenv(key);
        if (rc == null)
            return defaultValue;
        return rc;
    }

    private static String arg(String[] args, int index, String defaultValue) {
        if (index < args.length)
            return args[index];
        else
            return defaultValue;
    }

}