/**
 * 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.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import junit.framework.TestCase;

import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.transport.tcp.TcpTransportFactory;

public class ExclusiveConsumerTest extends TestCase {

   private static final String VM_BROKER_URL = "vm://localhost?broker.persistent=false&broker.useJmx=true";

   public ExclusiveConsumerTest(String name) {
      super(name);
   }

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

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

   private Connection createConnection(final boolean start) throws JMSException {
      ConnectionFactory cf = new ActiveMQConnectionFactory(VM_BROKER_URL);
      Connection conn = cf.createConnection();
      if (start) {
         conn.start();
      }
      return conn;
   }

   public void testExclusiveConsumerSelectedCreatedFirst() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE1?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE1");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE1");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         // TODO need two send a 2nd message - bug AMQ-1024
         // producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer.receive(100));
         assertNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }

   public void testExclusiveConsumerSelectedCreatedAfter() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE5");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE5?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE5");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer.receive(100));
         assertNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }

   public void testFailoverToAnotherExclusiveConsumerCreatedFirst() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession1 = null;
      Session exclusiveSession2 = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession1 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         exclusiveSession2 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         // This creates the exclusive consumer first which avoids AMQ-1024
         // bug.
         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE2?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer1 = exclusiveSession1.createConsumer(exclusiveQueue);
         MessageConsumer exclusiveConsumer2 = exclusiveSession2.createConsumer(exclusiveQueue);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE2");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE2");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer1.receive(100));
         assertNull(exclusiveConsumer2.receive(100));
         assertNull(fallbackConsumer.receive(100));

         // Close the exclusive consumer to verify the non-exclusive consumer
         // takes over
         exclusiveConsumer1.close();

         producer.send(msg);
         producer.send(msg);

         assertNotNull(exclusiveConsumer2.receive(100));
         assertNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }

   public void testFailoverToAnotherExclusiveConsumerCreatedAfter() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession1 = null;
      Session exclusiveSession2 = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession1 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         exclusiveSession2 = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         // This creates the exclusive consumer first which avoids AMQ-1024
         // bug.
         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE6?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer1 = exclusiveSession1.createConsumer(exclusiveQueue);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE6");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         MessageConsumer exclusiveConsumer2 = exclusiveSession2.createConsumer(exclusiveQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE6");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer1.receive(100));
         assertNull(exclusiveConsumer2.receive(100));
         assertNull(fallbackConsumer.receive(100));

         // Close the exclusive consumer to verify the non-exclusive consumer
         // takes over
         exclusiveConsumer1.close();

         producer.send(msg);
         producer.send(msg);

         assertNotNull(exclusiveConsumer2.receive(1000));
         assertNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }

   public void testFailoverToNonExclusiveConsumer() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         // This creates the exclusive consumer first which avoids AMQ-1024
         // bug.
         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE3?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE3");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE3");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer.receive(100));
         assertNull(fallbackConsumer.receive(100));

         // Close the exclusive consumer to verify the non-exclusive consumer
         // takes over
         exclusiveConsumer.close();

         producer.send(msg);

         assertNotNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }

   public void testFallbackToExclusiveConsumer() throws JMSException, InterruptedException {
      Connection conn = createConnection(true);

      Session exclusiveSession = null;
      Session fallbackSession = null;
      Session senderSession = null;

      try {

         exclusiveSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         fallbackSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
         senderSession = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);

         // This creates the exclusive consumer first which avoids AMQ-1024
         // bug.
         ActiveMQQueue exclusiveQueue = new ActiveMQQueue("TEST.QUEUE4?consumer.exclusive=true");
         MessageConsumer exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

         ActiveMQQueue fallbackQueue = new ActiveMQQueue("TEST.QUEUE4");
         MessageConsumer fallbackConsumer = fallbackSession.createConsumer(fallbackQueue);

         ActiveMQQueue senderQueue = new ActiveMQQueue("TEST.QUEUE4");

         MessageProducer producer = senderSession.createProducer(senderQueue);

         Message msg = senderSession.createTextMessage("test");
         producer.send(msg);
         Thread.sleep(100);

         // Verify exclusive consumer receives the message.
         assertNotNull(exclusiveConsumer.receive(100));
         assertNull(fallbackConsumer.receive(100));

         // Close the exclusive consumer to verify the non-exclusive consumer
         // takes over
         exclusiveConsumer.close();

         producer.send(msg);

         // Verify other non-exclusive consumer receices the message.
         assertNotNull(fallbackConsumer.receive(100));

         // Create exclusive consumer to determine if it will start receiving
         // the messages.
         exclusiveConsumer = exclusiveSession.createConsumer(exclusiveQueue);

         producer.send(msg);
         assertNotNull(exclusiveConsumer.receive(100));
         assertNull(fallbackConsumer.receive(100));

      } finally {
         fallbackSession.close();
         senderSession.close();
         conn.close();
      }

   }
}
