/**
 * 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.network;

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 java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.DestinationDoesNotExistException;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.SharedDeadLetterStrategy;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.transport.TransportFilter;
import org.apache.activemq.transport.failover.FailoverTransport;
import org.apache.activemq.xbean.BrokerFactoryBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

public class NetworkFailoverTest extends TestCase {

   protected static final int MESSAGE_COUNT = 10;
   private static final Logger LOG = LoggerFactory.getLogger(NetworkFailoverTest.class);

   protected AbstractApplicationContext context;
   protected Connection localConnection;
   protected Connection remoteConnection;
   protected BrokerService localBroker;
   protected BrokerService remoteBroker;
   protected Session localSession;
   protected Session remoteSession;
   protected ActiveMQQueue included = new ActiveMQQueue("include.test.foo");
   private final AtomicInteger replyToNonExistDest = new AtomicInteger(0);
   private final AtomicInteger roundTripComplete = new AtomicInteger(0);
   private final AtomicInteger remoteDLQCount = new AtomicInteger(0);

   public void testRequestReply() throws Exception {
      final MessageProducer remoteProducer = remoteSession.createProducer(null);
      MessageConsumer remoteConsumer = remoteSession.createConsumer(included);
      remoteConsumer.setMessageListener(new MessageListener() {
         @Override
         public void onMessage(Message msg) {
            final TextMessage textMsg = (TextMessage) msg;
            try {
               String payload = "REPLY: " + textMsg.getText() + ", " + textMsg.getJMSMessageID();
               Destination replyTo;
               replyTo = msg.getJMSReplyTo();
               textMsg.clearBody();
               textMsg.setText(payload);
               LOG.info("*** Sending response: {}", textMsg.getText());
               remoteProducer.send(replyTo, textMsg);
               LOG.info("replied with: " + textMsg.getJMSMessageID());

            } catch (DestinationDoesNotExistException expected) {
               // been removed but not yet recreated
               replyToNonExistDest.incrementAndGet();
               try {
                  LOG.info("NED: " + textMsg.getJMSMessageID());
               } catch (JMSException e) {
                  e.printStackTrace();
               }
            } catch (Exception e) {
               LOG.warn("*** Responder listener caught exception: ", e);
               e.printStackTrace();
            }
         }
      });

      Queue tempQueue = localSession.createTemporaryQueue();
      MessageProducer requestProducer = localSession.createProducer(included);
      requestProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
      MessageConsumer requestConsumer = localSession.createConsumer(tempQueue);

      // track remote dlq for forward failures
      MessageConsumer dlqconsumer = remoteSession.createConsumer(new ActiveMQQueue(SharedDeadLetterStrategy.DEFAULT_DEAD_LETTER_QUEUE_NAME));
      dlqconsumer.setMessageListener(new MessageListener() {
         @Override
         public void onMessage(Message message) {
            try {
               LOG.info("dlq " + message.getJMSMessageID());
            } catch (JMSException e) {
               e.printStackTrace();
            }
            remoteDLQCount.incrementAndGet();
         }
      });

      // allow for consumer infos to perculate around
      Thread.sleep(2000);
      long done = System.currentTimeMillis() + (MESSAGE_COUNT * 6000);
      int i = 0;
      while (MESSAGE_COUNT > roundTripComplete.get() + remoteDLQCount.get() + replyToNonExistDest.get() && done > System.currentTimeMillis()) {
         if (i < MESSAGE_COUNT) {
            String payload = "test msg " + i;
            i++;
            TextMessage msg = localSession.createTextMessage(payload);
            msg.setJMSReplyTo(tempQueue);
            requestProducer.send(msg);
            LOG.info("Sent: " + msg.getJMSMessageID() + ", Failing over");
            ((FailoverTransport) ((TransportFilter) ((TransportFilter) ((ActiveMQConnection) localConnection).getTransport()).getNext()).getNext()).handleTransportFailure(new IOException("Forcing failover from test"));
         }
         TextMessage result = (TextMessage) requestConsumer.receive(5000);
         if (result != null) {
            LOG.info("Got reply: " + result.getJMSMessageID() + ", " + result.getText());
            roundTripComplete.incrementAndGet();
         }
      }

      LOG.info("complete: " + roundTripComplete.get() + ", remoteDLQCount: " + remoteDLQCount.get() + ", replyToNonExistDest: " + replyToNonExistDest.get());
      assertEquals("complete:" + roundTripComplete.get() + ", remoteDLQCount: " + remoteDLQCount.get() + ", replyToNonExistDest: " + replyToNonExistDest.get(), MESSAGE_COUNT, roundTripComplete.get() + remoteDLQCount.get() + replyToNonExistDest.get());
   }

   @Override
   protected void setUp() throws Exception {
      super.setUp();
      doSetUp(true);
   }

   @Override
   protected void tearDown() throws Exception {
      doTearDown();
      super.tearDown();
   }

   protected void doTearDown() throws Exception {
      try {
         localConnection.close();
         remoteConnection.close();
      } catch (Exception ex) {
      }

      try {
         localBroker.stop();
      } catch (Exception ex) {
      }
      try {
         remoteBroker.stop();
      } catch (Exception ex) {
      }
   }

   protected void doSetUp(boolean deleteAllMessages) throws Exception {

      remoteBroker = createRemoteBroker();
      remoteBroker.setDeleteAllMessagesOnStartup(deleteAllMessages);
      remoteBroker.setCacheTempDestinations(true);
      remoteBroker.start();

      localBroker = createLocalBroker();
      localBroker.setDeleteAllMessagesOnStartup(deleteAllMessages);
      localBroker.setCacheTempDestinations(true);
      localBroker.start();

      String localURI = "tcp://localhost:61616";
      String remoteURI = "tcp://localhost:61617";
      ActiveMQConnectionFactory fac = new ActiveMQConnectionFactory("failover:(" + localURI + "," + remoteURI + ")?randomize=false&backup=false&trackMessages=true");
      localConnection = fac.createConnection();
      localConnection.setClientID("local");
      localConnection.start();
      fac = new ActiveMQConnectionFactory("failover:(" + remoteURI + "," + localURI + ")?randomize=false&backup=false&trackMessages=true");
      fac.setWatchTopicAdvisories(false);
      remoteConnection = fac.createConnection();
      remoteConnection.setClientID("remote");
      remoteConnection.start();

      localSession = localConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      remoteSession = remoteConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
   }

   protected String getRemoteBrokerURI() {
      return "org/apache/activemq/network/remoteBroker.xml";
   }

   protected String getLocalBrokerURI() {
      return "org/apache/activemq/network/localBroker.xml";
   }

   protected BrokerService createBroker(String uri) throws Exception {
      Resource resource = new ClassPathResource(uri);
      BrokerFactoryBean factory = new BrokerFactoryBean(resource);
      resource = new ClassPathResource(uri);
      factory = new BrokerFactoryBean(resource);
      factory.afterPropertiesSet();
      BrokerService result = factory.getBroker();
      return result;
   }

   protected BrokerService createLocalBroker() throws Exception {
      return createBroker(getLocalBrokerURI());
   }

   protected BrokerService createRemoteBroker() throws Exception {
      return createBroker(getRemoteBrokerURI());
   }
}
