content: /*
   * 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;
  
  import javax.jms.Connection;
  import javax.jms.DeliveryMode;
  import javax.jms.JMSException;
  import javax.jms.Message;
  import javax.jms.MessageConsumer;
  import javax.jms.MessageListener;
  import javax.jms.Queue;
  import javax.jms.Session;
  import java.util.concurrent.CountDownLatch;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class JmsSendWithAsyncCallbackTest extends TestSupport {
  
     private static final Logger LOG = LoggerFactory.getLogger(JmsSendWithAsyncCallbackTest.class);
  
     private Connection connection;
  
     @Override
     protected void setUp() throws Exception {
        super.setUp();
        connection = createConnection();
     }
  
     /**
      * @see junit.framework.TestCase#tearDown()
      */
     @Override
     protected void tearDown() throws Exception {
        if (connection != null) {
           connection.close();
           connection = null;
        }
        super.tearDown();
     }
  
     public void testAsyncCallbackIsFaster() throws JMSException, InterruptedException {
        connection.start();
  
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue(getName());
  
        // setup a consumer to drain messages..
        MessageConsumer consumer = session.createConsumer(queue);
        consumer.setMessageListener(message -> {});
  
        // warmup...
        for (int i = 0; i < 10; i++) {
           benchmarkNonCallbackRate();
           benchmarkCallbackRate();
        }
  
        double callbackRate = benchmarkCallbackRate();
        double nonCallbackRate = benchmarkNonCallbackRate();
  
        LOG.info(String.format("AsyncCallback Send rate: %,.2f m/s", callbackRate));
        LOG.info(String.format("NonAsyncCallback Send rate: %,.2f m/s", nonCallbackRate));
  
        // The async style HAS to be faster than the non-async style..
        assertTrue("async rate[" + callbackRate + "] should beat non-async rate[" + nonCallbackRate + "]", callbackRate / nonCallbackRate > 1.5);
     }
  
     private double benchmarkNonCallbackRate() throws JMSException {
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue(getName());
        int count = 1000;
        ActiveMQMessageProducer producer = (ActiveMQMessageProducer) session.createProducer(queue);
        producer.setDeliveryMode(DeliveryMode.PERSISTENT);
        long start = System.currentTimeMillis();
        for (int i = 0; i < count; i++) {
           producer.send(session.createTextMessage("Hello"));
        }
        return 1000.0 * count / (System.currentTimeMillis() - start);
     }
  
     private double benchmarkCallbackRate() throws JMSException, InterruptedException {
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue(getName());
        int count = 1000;
        final CountDownLatch messagesSent = new CountDownLatch(count);
        ActiveMQMessageProducer producer = (ActiveMQMessageProducer) session.createProducer(queue);
        producer.setDeliveryMode(DeliveryMode.PERSISTENT);
        long start = System.currentTimeMillis();
        for (int i = 0; i < count; i++) {
           producer.send(session.createTextMessage("Hello"), new AsyncCallback() {
              @Override
              public void onSuccess() {
                 messagesSent.countDown();
              }
  
              @Override
              public void onException(JMSException exception) {
                 exception.printStackTrace();
              }
           });
        }
        messagesSent.await();
        return 1000.0 * count / (System.currentTimeMillis() - start);
     }
  }
  