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.transport.amqp.profile;
  
  import java.util.Enumeration;
  import java.util.concurrent.TimeUnit;
  
  import jakarta.jms.JMSException;
  import jakarta.jms.Message;
  import jakarta.jms.Queue;
  import jakarta.jms.QueueBrowser;
  import jakarta.jms.Session;
  
  import org.apache.activemq.transport.amqp.JMSClientTestSupport;
  import org.junit.Ignore;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Test that creates a large number of QueueBrowser and Session instances over time.
   *
   * There is a pause at the end of the test to allow for heap dumps or post run analysis.
   */
  public class QueueBrowserStressTest extends JMSClientTestSupport {
  
      protected static final Logger LOG = LoggerFactory.getLogger(QueueBrowserStressTest.class);
  
      private final int NUM_ITERATIONS = 1000;
  
      @Ignore("Used for profiling broker memory usage.")
      @Test
      public void testBrowserLeak() throws JMSException, InterruptedException {
          connection = createConnection();
  
          Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
          Queue queue = session.createQueue(getDestinationName());
          session.close();
  
          for (int i = 1; i <= NUM_ITERATIONS; ++i) {
              // When recreating session, memory leak does occurs on the client but memory leak still occurs on the server
              session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
              QueueBrowser browser = session.createBrowser(queue, "JMSXGroupSeq=0");
  
              int j = 1;
  
              Enumeration<?> enums = browser.getEnumeration();
              if (!enums.hasMoreElements()) {
                  LOG.debug("No messages in {}", queue.getQueueName());
              } else {
                  Message message = (Message) enums.nextElement();
                  if (message != null) {
                      LOG.debug("Received {} message : {} from {}", new Object[] {j++, message, queue.getQueueName()});
                  }
              }
  
              LOG.debug("close browser for {}", queue.getQueueName());
              try {
                  browser.close();
              } catch (JMSException e) {
                  LOG.error("Error on browser close: {}", e);
              }
              browser = null;
  
              LOG.debug("close session for {}", queue.getQueueName());
              try {
                  session.close();
              } catch (JMSException e) {
                  LOG.error("Error on session close: {}", e);
              }
              session = null;
          }
  
          LOG.info("Task complete, capture heap dump now");
          TimeUnit.MINUTES.sleep(5);
      }
  }
  