001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.example.client;
018    
019    import java.util.concurrent.CountDownLatch;
020    import java.util.concurrent.ExecutorService;
021    import java.util.concurrent.Executors;
022    import java.util.concurrent.TimeUnit;
023    
024    import org.apache.camel.ProducerTemplate;
025    import org.springframework.context.ApplicationContext;
026    import org.springframework.context.support.ClassPathXmlApplicationContext;
027    
028    /**
029     * Client that uses the {@link ProducerTemplate} to easily exchange messages with the Server.
030     * <p/>
031     * Requires that the JMS broker is running, as well as CamelServer
032     */
033    public final class CamelClient {
034    
035        private static final int SIZE = 10000;
036        private static final int POOL = 100;
037    
038        private CamelClient() {
039            // Helper class
040        }
041    
042        public static void main(final String[] args) throws Exception {
043            System.out.println("Notice this client requires that the CamelServer is already running!");
044    
045            ApplicationContext context = new ClassPathXmlApplicationContext("camel-client.xml");
046    
047            // get the camel template for Spring template style sending of messages (= producer)
048            final ProducerTemplate producer = (ProducerTemplate) context.getBean("camelTemplate");
049    
050            // now send a lot of messages
051            System.out.println("Sending ...");
052    
053            final CountDownLatch latch = new CountDownLatch(POOL);
054    
055            ExecutorService executors = Executors.newFixedThreadPool(POOL);
056            for (int i = 0; i < POOL; i++) {
057                final Integer idx = i;
058                executors.execute(new Runnable() {
059                    public void run() {
060                        try {
061                            for (int j = 0; j < SIZE / POOL; j++) {
062                                producer.sendBody("jms:queue:inbox", "Message " + idx.intValue() * j + j);
063                            }
064                        } finally {
065                            latch.countDown();
066                        }
067                    }
068                });
069            }
070    
071            latch.await(300, TimeUnit.SECONDS);
072            System.out.println("... Send " + SIZE + " message to JMS broker");
073    
074            System.exit(0);
075        }
076    
077    }