/**
 * 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.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.Vector;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;

import junit.framework.TestCase;

public class JmsConsumerResetActiveListenerTest extends TestCase {

   private Connection connection;
   private ActiveMQConnectionFactory factory;

   @Override
   protected void setUp() throws Exception {
      factory = new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false");
      connection = factory.createConnection();
   }

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

   /**
    * verify the (undefined by spec) behaviour of setting a listener while receiving a message.
    *
    * @throws Exception
    */
   public void testSetListenerFromListener() throws Exception {
      Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      Destination dest = session.createQueue("Queue-" + getName());
      final MessageConsumer consumer = session.createConsumer(dest);

      final CountDownLatch latch = new CountDownLatch(2);
      final AtomicBoolean first = new AtomicBoolean(true);
      final Vector<Object> results = new Vector<>();
      consumer.setMessageListener(new MessageListener() {

         @Override
         public void onMessage(Message message) {
            if (first.compareAndSet(true, false)) {
               try {
                  consumer.setMessageListener(this);
                  results.add(message);
               } catch (JMSException e) {
                  results.add(e);
               }
            } else {
               results.add(message);
            }
            latch.countDown();
         }
      });

      connection.start();

      MessageProducer producer = session.createProducer(dest);
      producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
      producer.send(session.createTextMessage("First"));
      producer.send(session.createTextMessage("Second"));

      assertTrue("we did not timeout", latch.await(5, TimeUnit.SECONDS));

      assertEquals("we have a result", 2, results.size());
      Object result = results.get(0);
      assertTrue(result instanceof TextMessage);
      assertEquals("result is first", "First", ((TextMessage) result).getText());
      result = results.get(1);
      assertTrue(result instanceof TextMessage);
      assertEquals("result is first", "Second", ((TextMessage) result).getText());
   }

   /**
    * and a listener on a new consumer, just in case.
    *
    * @throws Exception
    */
   public void testNewConsumerSetListenerFromListener() throws Exception {
      final Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      final Destination dest = session.createQueue("Queue-" + getName());
      final MessageConsumer consumer = session.createConsumer(dest);

      final CountDownLatch latch = new CountDownLatch(2);
      final AtomicBoolean first = new AtomicBoolean(true);
      final Vector<Object> results = new Vector<>();
      consumer.setMessageListener(new MessageListener() {

         @Override
         public void onMessage(Message message) {
            if (first.compareAndSet(true, false)) {
               try {
                  MessageConsumer anotherConsumer = session.createConsumer(dest);
                  anotherConsumer.setMessageListener(this);
                  results.add(message);
               } catch (JMSException e) {
                  results.add(e);
               }
            } else {
               results.add(message);
            }
            latch.countDown();
         }
      });

      connection.start();

      MessageProducer producer = session.createProducer(dest);
      producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
      producer.send(session.createTextMessage("First"));
      producer.send(session.createTextMessage("Second"));

      assertTrue("we did not timeout", latch.await(5, TimeUnit.SECONDS));

      assertEquals("we have a result", 2, results.size());
      Object result = results.get(0);
      assertTrue(result instanceof TextMessage);
      assertEquals("result is first", "First", ((TextMessage) result).getText());
      result = results.get(1);
      assertTrue(result instanceof TextMessage);
      assertEquals("result is first", "Second", ((TextMessage) result).getText());
   }
}
