/**
 * 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.bugs;

import java.io.File;
import java.util.ArrayList;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.jms.BytesMessage;
import javax.jms.Connection;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.FilePendingQueueMessageStoragePolicy;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter;
import org.apache.activemq.util.IOHelper;

public class AMQ2616Test extends TestCase {

   private static final int NUMBER = 2000;
   private BrokerService brokerService;
   private final ArrayList<Thread> threads = new ArrayList<Thread>();
   private final String ACTIVEMQ_BROKER_BIND = "tcp://0.0.0.0:0";
   private final AtomicBoolean shutdown = new AtomicBoolean();

   private String connectionUri;

   public void testQueueResourcesReleased() throws Exception {
      ActiveMQConnectionFactory fac = new ActiveMQConnectionFactory(connectionUri);
      Connection tempConnection = fac.createConnection();
      tempConnection.start();
      Session tempSession = tempConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue tempQueue = tempSession.createTemporaryQueue();

      Connection testConnection = fac.createConnection();
      long startUsage = brokerService.getSystemUsage().getMemoryUsage().getUsage();
      Session testSession = testConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer testProducer = testSession.createProducer(tempQueue);
      byte[] payload = new byte[1024 * 4];
      for (int i = 0; i < NUMBER; i++) {
         BytesMessage msg = testSession.createBytesMessage();
         msg.writeBytes(payload);
         testProducer.send(msg);
      }
      long endUsage = brokerService.getSystemUsage().getMemoryUsage().getUsage();
      assertFalse(startUsage == endUsage);
      tempConnection.close();
      Thread.sleep(1000);
      endUsage = brokerService.getSystemUsage().getMemoryUsage().getUsage();
      assertEquals(startUsage, endUsage);
   }

   @Override
   protected void setUp() throws Exception {
      // Start an embedded broker up.
      brokerService = new BrokerService();

      KahaDBPersistenceAdapter adaptor = new KahaDBPersistenceAdapter();
      adaptor.setEnableJournalDiskSyncs(false);
      File file = new File("target/AMQ2616Test");
      IOHelper.mkdirs(file);
      IOHelper.deleteChildren(file);
      adaptor.setDirectory(file);
      brokerService.setPersistenceAdapter(adaptor);

      PolicyMap policyMap = new PolicyMap();
      PolicyEntry pe = new PolicyEntry();
      pe.setMemoryLimit(10 * 1024 * 1024);
      pe.setOptimizedDispatch(true);
      pe.setProducerFlowControl(false);
      pe.setExpireMessagesPeriod(1000);
      pe.setPendingQueuePolicy(new FilePendingQueueMessageStoragePolicy());
      policyMap.put(new ActiveMQQueue(">"), pe);
      brokerService.setDestinationPolicy(policyMap);
      brokerService.getSystemUsage().getMemoryUsage().setLimit(20 * 1024 * 1024);
      brokerService.getSystemUsage().getTempUsage().setLimit(200 * 1024 * 1024);
      brokerService.addConnector(ACTIVEMQ_BROKER_BIND);
      brokerService.start();
      brokerService.waitUntilStarted();

      connectionUri = brokerService.getTransportConnectors().get(0).getPublishableConnectString();

      new ActiveMQQueue(getName());
   }

   @Override
   protected void tearDown() throws Exception {
      // Stop any running threads.
      shutdown.set(true);
      for (Thread t : threads) {
         t.interrupt();
         t.join();
      }
      brokerService.stop();
   }

}
