/**
 * 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.usecases;

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.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.apache.activemq.test.TestSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

/**
 *
 */
public class DurableConsumerCloseAndReconnectTest extends TestSupport {

   protected static final long RECEIVE_TIMEOUT = 5000L;
   private static final Logger LOG = LoggerFactory.getLogger(DurableConsumerCloseAndReconnectTest.class);

   BrokerService brokerService;

   protected Connection connection;
   private Session session;
   private MessageConsumer consumer;
   private MessageProducer producer;
   private Destination destination;
   private int messageCount;

   private String vmConnectorURI;

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

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

   protected ActiveMQConnectionFactory createConnectionFactory() throws Exception {
      return new ActiveMQConnectionFactory(vmConnectorURI);
   }

   protected void createBroker() throws Exception {
      brokerService = new BrokerService();
      brokerService.setUseJmx(false);
      brokerService.setPersistent(false);
      KahaDBPersistenceAdapter store = new KahaDBPersistenceAdapter();
      brokerService.setPersistenceAdapter(store);
      brokerService.start();
      brokerService.waitUntilStarted();
      vmConnectorURI = brokerService.getVmConnectorURI().toString();
   }

   protected void stopBroker() throws Exception {
      brokerService.stop();
      brokerService.waitUntilStopped();
   }

   public void testDurableSubscriberReconnectMultipleTimes() throws Exception {
      Connection dummyConnection = createConnection();
      dummyConnection.start();

      makeConsumer(Session.AUTO_ACKNOWLEDGE);
      closeConsumer();

      publish(30);

      int counter = 1;
      for (int i = 0; i < 15; i++) {
         makeConsumer(Session.AUTO_ACKNOWLEDGE);
         Message message = consumer.receive(RECEIVE_TIMEOUT);
         assertTrue("Should have received a message!", message != null);
         LOG.info("Received message " + counter++);
         message = consumer.receive(RECEIVE_TIMEOUT);
         assertTrue("Should have received a message!", message != null);
         LOG.info("Received message " + counter++);
         closeConsumer();
      }

      dummyConnection.close();
   }

   public void testCreateDurableConsumerCloseThenReconnect() throws Exception {
      // force the server to stay up across both connection tests
      Connection dummyConnection = createConnection();
      dummyConnection.start();

      consumeMessagesDeliveredWhileConsumerClosed();

      dummyConnection.close();

      // now lets try again without one connection open
      consumeMessagesDeliveredWhileConsumerClosed();
   }

   protected void consumeMessagesDeliveredWhileConsumerClosed() throws Exception {
      // default to client ack for consumer
      makeConsumer();
      closeConsumer();

      publish(1);

      // wait a few moments for the close to really occur
      Thread.sleep(1000);

      makeConsumer();

      Message message = consumer.receive(RECEIVE_TIMEOUT);
      assertTrue("Should have received a message!", message != null);

      closeConsumer();

      LOG.info("Now lets create the consumer again and because we didn't ack, we should get it again");
      makeConsumer();

      message = consumer.receive(RECEIVE_TIMEOUT);
      assertTrue("Should have received a message!", message != null);
      message.acknowledge();

      closeConsumer();

      LOG.info("Now lets create the consumer again and because we did ack, we should not get it again");
      makeConsumer();

      message = consumer.receive(2000);
      assertTrue("Should have no more messages left!", message == null);

      closeConsumer();

      LOG.info("Lets publish one more message now");
      publish(1);

      makeConsumer();
      message = consumer.receive(RECEIVE_TIMEOUT);
      assertTrue("Should have received a message!", message != null);
      message.acknowledge();

      closeConsumer();
   }

   protected void publish(int numMessages) throws Exception {
      connection = createConnection();
      connection.start();

      session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      destination = createDestination();

      producer = session.createProducer(destination);
      producer.setDeliveryMode(DeliveryMode.PERSISTENT);
      for (int i = 0; i < numMessages; i++) {
         TextMessage msg = session.createTextMessage("This is a test: " + messageCount++);
         producer.send(msg);
      }

      producer.close();
      producer = null;
      closeSession();
   }

   protected Destination createDestination() throws JMSException {
      if (isTopic()) {
         return session.createTopic(getSubject());
      }
      else {
         return session.createQueue(getSubject());
      }
   }

   protected boolean isTopic() {
      return true;
   }

   protected void closeConsumer() throws JMSException {
      LOG.info("Closing the consumer");
      consumer.close();
      consumer = null;
      closeSession();
   }

   protected void closeSession() throws JMSException {
      session.close();
      session = null;
      connection.close();
      connection = null;
   }

   protected void makeConsumer() throws Exception {
      makeConsumer(Session.CLIENT_ACKNOWLEDGE);
   }

   protected void makeConsumer(int ackMode) throws Exception {
      String durableName = getName();
      String clientID = getSubject();
      LOG.info("Creating a durable subscriber for clientID: " + clientID + " and durable name: " + durableName);
      createSession(clientID, ackMode);
      consumer = createConsumer(durableName);
   }

   private MessageConsumer createConsumer(String durableName) throws JMSException {
      if (destination instanceof Topic) {
         return session.createDurableSubscriber((Topic) destination, durableName);
      }
      else {
         return session.createConsumer(destination);
      }
   }

   protected void createSession(String clientID, int ackMode) throws Exception {
      connection = createConnection();
      connection.setClientID(clientID);
      connection.start();

      session = connection.createSession(false, ackMode);
      destination = createDestination();
   }
}
