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.artemis.tests.performance.sends;
  
  import javax.jms.Connection;
  import javax.jms.Message;
  import javax.jms.MessageConsumer;
  import javax.jms.Queue;
  import javax.jms.Session;
  
  import org.apache.activemq.artemis.api.jms.ActiveMQJMSConstants;
  import org.junit.jupiter.api.Test;
  
  public class PreACKPerf extends AbstractSendReceivePerfTest {
  
     @Override
     protected void consumeMessages(Connection c, String qName) throws Exception {
        int mode = 0;
        mode = ActiveMQJMSConstants.PRE_ACKNOWLEDGE;
  
        System.out.println("Receiver: Using PRE-ACK mode");
  
        Session s = c.createSession(false, mode);
        Queue q = s.createQueue(qName);
        MessageConsumer consumer = s.createConsumer(q, null, false);
  
        c.start();
  
        Message m = null;
  
        long start = System.currentTimeMillis();
  
        long nmessages = 0;
        long timeout = System.currentTimeMillis() + 30 * 1000;
        while (timeout > System.currentTimeMillis()) {
           m = consumer.receive(5000);
  
           nmessages++;
  
           if (m == null) {
              throw new Exception("Failed with m = null");
           }
  
           if (nmessages % 10000 == 0) {
              printMsgsSec(start, nmessages);
           }
  
        }
  
        printMsgsSec(start, nmessages);
     }
  
     protected void printMsgsSec(final long start, final double nmessages) {
  
        long end = System.currentTimeMillis();
        double elapsed = ((double) end - (double) start) / 1000f;
  
        double messagesPerSecond = nmessages / elapsed;
  
        System.out.println("end = " + end + ", start=" + start + ", numberOfMessages=" + nmessages + ", elapsed=" + elapsed + " msgs/sec= " + messagesPerSecond);
  
     }
  
     @Test
     public void testSendReceive() throws Exception {
        super.doSendReceiveTestImpl();
     }
  }
  