/**
 * 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 java.util.ArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

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.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;

import junit.framework.TestCase;

import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.activemq.command.ActiveMQQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MessageListenerRedeliveryTest extends TestCase {

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

   private Connection connection;

   @Override
   protected void setUp() throws Exception {
      connection = createConnection();
   }

   /**
    * @see junit.framework.TestCase#tearDown()
    */
   @Override
   protected void tearDown() throws Exception {
      if (connection != null) {
         connection.close();
         connection = null;
      }
   }

   protected RedeliveryPolicy getRedeliveryPolicy() {
      RedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();
      redeliveryPolicy.setInitialRedeliveryDelay(0);
      redeliveryPolicy.setRedeliveryDelay(1000);
      redeliveryPolicy.setMaximumRedeliveries(3);
      redeliveryPolicy.setBackOffMultiplier((short) 2);
      redeliveryPolicy.setUseExponentialBackOff(true);
      return redeliveryPolicy;
   }

   protected Connection createConnection() throws Exception {
      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost?broker.persistent=false&marshal=true");
      factory.setRedeliveryPolicy(getRedeliveryPolicy());
      return factory.createConnection();
   }

   private class TestMessageListener implements MessageListener {

      public int counter;
      private final Session session;

      public TestMessageListener(Session session) {
         this.session = session;
      }

      @Override
      public void onMessage(Message message) {
         try {
            LOG.info("Message Received: " + message);
            counter++;
            if (counter <= 4) {
               LOG.info("Message Rollback.");
               session.rollback();
            }
            else {
               LOG.info("Message Commit.");
               message.acknowledge();
               session.commit();
            }
         }
         catch (JMSException e) {
            LOG.error("Error when rolling back transaction");
         }
      }
   }

   public void testQueueRollbackConsumerListener() throws JMSException {
      connection.start();

      Session session = connection.createSession(true, Session.CLIENT_ACKNOWLEDGE);
      Queue queue = session.createQueue("queue-" + getName());
      MessageProducer producer = createProducer(session, queue);
      Message message = createTextMessage(session);
      producer.send(message);
      session.commit();

      MessageConsumer consumer = session.createConsumer(queue);

      ActiveMQMessageConsumer mc = (ActiveMQMessageConsumer) consumer;
      mc.setRedeliveryPolicy(getRedeliveryPolicy());

      TestMessageListener listener = new TestMessageListener(session);
      consumer.setMessageListener(listener);

      try {
         Thread.sleep(500);
      }
      catch (InterruptedException e) {
      }

      // first try.. should get 2 since there is no delay on the
      // first redeliver..
      assertEquals(2, listener.counter);

      try {
         Thread.sleep(1000);
      }
      catch (InterruptedException e) {
      }
      // 2nd redeliver (redelivery after 1 sec)
      assertEquals(3, listener.counter);

      try {
         Thread.sleep(2000);
      }
      catch (InterruptedException e) {
      }
      // 3rd redeliver (redelivery after 2 seconds) - it should give up after
      // that
      assertEquals(4, listener.counter);

      // create new message
      producer.send(createTextMessage(session));
      session.commit();

      try {
         Thread.sleep(500);
      }
      catch (InterruptedException e) {
      }
      // it should be committed, so no redelivery
      assertEquals(5, listener.counter);

      try {
         Thread.sleep(1500);
      }
      catch (InterruptedException e) {
      }
      // no redelivery, counter should still be 4
      assertEquals(5, listener.counter);

      session.close();
   }

   public void testQueueRollbackSessionListener() throws JMSException {
      connection.start();

      Session session = connection.createSession(true, Session.CLIENT_ACKNOWLEDGE);
      Queue queue = session.createQueue("queue-" + getName());
      MessageProducer producer = createProducer(session, queue);
      Message message = createTextMessage(session);
      producer.send(message);
      session.commit();

      MessageConsumer consumer = session.createConsumer(queue);

      ActiveMQMessageConsumer mc = (ActiveMQMessageConsumer) consumer;
      mc.setRedeliveryPolicy(getRedeliveryPolicy());

      TestMessageListener listener = new TestMessageListener(session);
      consumer.setMessageListener(listener);

      try {
         Thread.sleep(500);
      }
      catch (InterruptedException e) {

      }
      // first try
      assertEquals(2, listener.counter);

      try {
         Thread.sleep(1000);
      }
      catch (InterruptedException e) {

      }
      // second try (redelivery after 1 sec)
      assertEquals(3, listener.counter);

      try {
         Thread.sleep(2000);
      }
      catch (InterruptedException e) {

      }
      // third try (redelivery after 2 seconds) - it should give up after that
      assertEquals(4, listener.counter);

      // create new message
      producer.send(createTextMessage(session));
      session.commit();

      try {
         Thread.sleep(500);
      }
      catch (InterruptedException e) {
         // ignore
      }
      // it should be committed, so no redelivery
      assertEquals(5, listener.counter);

      try {
         Thread.sleep(1500);
      }
      catch (InterruptedException e) {
         // ignore
      }
      // no redelivery, counter should still be 4
      assertEquals(5, listener.counter);

      session.close();
   }

   public void testQueueSessionListenerExceptionRetry() throws Exception {
      connection.start();

      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue("queue-" + getName());
      MessageProducer producer = createProducer(session, queue);
      Message message = createTextMessage(session, "1");
      producer.send(message);
      message = createTextMessage(session, "2");
      producer.send(message);

      MessageConsumer consumer = session.createConsumer(queue);

      final CountDownLatch gotMessage = new CountDownLatch(2);
      final AtomicInteger count = new AtomicInteger(0);
      final int maxDeliveries = getRedeliveryPolicy().getMaximumRedeliveries();
      final ArrayList<String> received = new ArrayList<>();
      consumer.setMessageListener(new MessageListener() {
         @Override
         public void onMessage(Message message) {
            LOG.info("Message Received: " + message);
            try {
               received.add(((TextMessage) message).getText());
            }
            catch (JMSException e) {
               e.printStackTrace();
               fail(e.toString());
            }
            if (count.incrementAndGet() < maxDeliveries) {
               throw new RuntimeException(getName() + " force a redelivery");
            }
            // new blood
            count.set(0);
            gotMessage.countDown();
         }
      });

      assertTrue("got message before retry expiry", gotMessage.await(20, TimeUnit.SECONDS));

      for (int i = 0; i < maxDeliveries; i++) {
         assertEquals("got first redelivered: " + i, "1", received.get(i));
      }
      for (int i = maxDeliveries; i < maxDeliveries * 2; i++) {
         assertEquals("got first redelivered: " + i, "2", received.get(i));
      }
      session.close();
   }

   public void testQueueSessionListenerExceptionDlq() throws Exception {
      connection.start();

      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue("queue-" + getName());
      MessageProducer producer = createProducer(session, queue);
      Message message = createTextMessage(session);
      producer.send(message);

      final Message[] dlqMessage = new Message[1];
      ActiveMQDestination dlqDestination = new ActiveMQQueue("ActiveMQ.DLQ");
      MessageConsumer dlqConsumer = session.createConsumer(dlqDestination);
      final CountDownLatch gotDlqMessage = new CountDownLatch(1);
      dlqConsumer.setMessageListener(new MessageListener() {
         @Override
         public void onMessage(Message message) {
            LOG.info("DLQ Message Received: " + message);
            dlqMessage[0] = message;
            gotDlqMessage.countDown();
         }
      });

      MessageConsumer consumer = session.createConsumer(queue);

      final int maxDeliveries = getRedeliveryPolicy().getMaximumRedeliveries();
      final CountDownLatch gotMessage = new CountDownLatch(maxDeliveries);

      consumer.setMessageListener(new MessageListener() {
         @Override
         public void onMessage(Message message) {
            LOG.info("Message Received: " + message);
            gotMessage.countDown();
            throw new RuntimeException(getName() + " force a redelivery");
         }
      });

      assertTrue("got message before retry expiry", gotMessage.await(20, TimeUnit.SECONDS));

      // check DLQ
      assertTrue("got dlq message", gotDlqMessage.await(20, TimeUnit.SECONDS));

      // check DLQ message cause is captured
      message = dlqMessage[0];
      assertNotNull("dlq message captured", message);
      String cause = message.getStringProperty(ActiveMQMessage.DLQ_DELIVERY_FAILURE_CAUSE_PROPERTY);

      LOG.info("DLQ'd message cause reported as: {}", cause);

      assertTrue("cause 'cause' exception is remembered", cause.contains("RuntimeException"));
      assertTrue("is correct exception", cause.contains(getName()));
      assertTrue("cause exception is remembered", cause.contains("Throwable"));
      assertTrue("cause policy is remembered", cause.contains("RedeliveryPolicy"));

      session.close();
   }

   private TextMessage createTextMessage(Session session, String text) throws JMSException {
      return session.createTextMessage(text);
   }

   private TextMessage createTextMessage(Session session) throws JMSException {
      return session.createTextMessage("Hello");
   }

   private MessageProducer createProducer(Session session, Destination queue) throws JMSException {
      MessageProducer producer = session.createProducer(queue);
      producer.setDeliveryMode(getDeliveryMode());
      return producer;
   }

   protected int getDeliveryMode() {
      return DeliveryMode.PERSISTENT;
   }
}
