/**
 * 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.advisory;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.Topic;

import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.broker.region.RegionBroker;
import org.apache.activemq.command.ActiveMQTempQueue;
import org.apache.activemq.command.ActiveMQTempTopic;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 */
public class TempDestDeleteTest extends EmbeddedBrokerTestSupport implements ConsumerListener {

   private static final Logger LOG = LoggerFactory.getLogger(TempDestDeleteTest.class);

   protected int consumerCounter;
   protected ConsumerEventSource topicConsumerEventSource;
   protected BlockingQueue<ConsumerEvent> eventQueue = new ArrayBlockingQueue<ConsumerEvent>(1000);

   private ConsumerEventSource queueConsumerEventSource;
   private Connection connection;
   private Session session;
   private ActiveMQTempTopic tempTopic;
   private ActiveMQTempQueue tempQueue;

   public void testDeleteTempTopicDeletesAvisoryTopics() throws Exception {
      topicConsumerEventSource.start();

      MessageConsumer consumer = createConsumer(tempTopic);
      assertConsumerEvent(1, true);

      Topic advisoryTopic = AdvisorySupport.getConsumerAdvisoryTopic(tempTopic);
      assertTrue(destinationExists(advisoryTopic));

      consumer.close();

      // Once we delete the topic, the advisory topic for the destination
      // should also be deleted.
      tempTopic.delete();

      assertFalse(destinationExists(advisoryTopic));
   }

   public void testDeleteTempQueueDeletesAvisoryTopics() throws Exception {
      queueConsumerEventSource.start();

      MessageConsumer consumer = createConsumer(tempQueue);
      assertConsumerEvent(1, true);

      Topic advisoryTopic = AdvisorySupport.getConsumerAdvisoryTopic(tempQueue);
      assertTrue(destinationExists(advisoryTopic));

      consumer.close();

      // Once we delete the queue, the advisory topic for the destination
      // should also be deleted.
      tempQueue.delete();

      assertFalse(destinationExists(advisoryTopic));
   }

   private boolean destinationExists(Destination dest) throws Exception {
      RegionBroker rb = (RegionBroker) broker.getBroker().getAdaptor(RegionBroker.class);
      return rb.getTopicRegion().getDestinationMap().containsKey(dest) || rb.getQueueRegion().getDestinationMap().containsKey(dest) || rb.getTempTopicRegion().getDestinationMap().containsKey(dest) || rb.getTempQueueRegion().getDestinationMap().containsKey(dest);
   }

   public void onConsumerEvent(ConsumerEvent event) {
      eventQueue.add(event);
   }

   protected void setUp() throws Exception {
      super.setUp();
      connection = createConnection();
      connection.start();

      session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

      tempTopic = (ActiveMQTempTopic) session.createTemporaryTopic();
      topicConsumerEventSource = new ConsumerEventSource(connection, tempTopic);
      topicConsumerEventSource.setConsumerListener(this);

      tempQueue = (ActiveMQTempQueue) session.createTemporaryQueue();
      queueConsumerEventSource = new ConsumerEventSource(connection, tempQueue);
      queueConsumerEventSource.setConsumerListener(this);
   }

   protected void tearDown() throws Exception {
      if (connection != null) {
         connection.close();
      }
      super.tearDown();
   }

   protected void assertConsumerEvent(int count, boolean started) throws InterruptedException {
      ConsumerEvent event = waitForConsumerEvent();
      assertEquals("Consumer count", count, event.getConsumerCount());
      assertEquals("started", started, event.isStarted());
   }

   protected MessageConsumer createConsumer(Destination dest) throws JMSException {
      final String consumerText = "Consumer: " + (++consumerCounter);
      LOG.info("Creating consumer: " + consumerText + " on destination: " + dest);

      MessageConsumer consumer = session.createConsumer(dest);
      consumer.setMessageListener(new MessageListener() {
         public void onMessage(Message message) {
            LOG.info("Received message by: " + consumerText + " message: " + message);
         }
      });
      return consumer;
   }

   protected ConsumerEvent waitForConsumerEvent() throws InterruptedException {
      ConsumerEvent answer = eventQueue.poll(1000, TimeUnit.MILLISECONDS);
      assertTrue("Should have received a consumer event!", answer != null);
      return answer;
   }

}
