/**
 * 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.bugs;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

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.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.QueueViewMBean;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AMQ3145Test {

   private static final Logger LOG = LoggerFactory.getLogger(AMQ3145Test.class);
   private final String MESSAGE_TEXT = new String(new byte[1024]);
   BrokerService broker;
   ConnectionFactory factory;
   Connection connection;
   Session session;
   Queue queue;
   MessageConsumer consumer;

   @Before
   public void createBroker() throws Exception {
      createBroker(true);
   }

   public void createBroker(boolean deleteAll) throws Exception {
      broker = new BrokerService();
      broker.setDeleteAllMessagesOnStartup(deleteAll);
      broker.setDataDirectory("target/AMQ3145Test");
      broker.setUseJmx(true);
      broker.getManagementContext().setCreateConnector(false);
      broker.addConnector("tcp://localhost:0");
      broker.start();
      broker.waitUntilStarted();
      factory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getConnectUri().toString());
      connection = factory.createConnection();
      connection.start();
      session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
   }

   @After
   public void tearDown() throws Exception {
      if (consumer != null) {
         consumer.close();
      }
      session.close();
      connection.stop();
      connection.close();
      broker.stop();
   }

   @Test
   public void testCacheDisableReEnable() throws Exception {
      createProducerAndSendMessages(1);
      QueueViewMBean proxy = getProxyToQueueViewMBean();
      assertTrue("cache is enabled", proxy.isCacheEnabled());
      tearDown();
      createBroker(false);
      proxy = getProxyToQueueViewMBean();
      assertEquals("one pending message", 1, proxy.getQueueSize());
      assertTrue("cache is disabled when there is a pending message", !proxy.isCacheEnabled());

      createConsumer(1);
      createProducerAndSendMessages(1);
      assertTrue("cache is enabled again on next send when there are no messages", proxy.isCacheEnabled());
   }

   private QueueViewMBean getProxyToQueueViewMBean() throws MalformedObjectNameException, JMSException {
      ObjectName queueViewMBeanName = new ObjectName("org.apache.activemq" + ":destinationType=Queue,destinationName=" + queue.getQueueName() + ",type=Broker,brokerName=localhost");
      QueueViewMBean proxy = (QueueViewMBean) broker.getManagementContext().newProxyInstance(queueViewMBeanName, QueueViewMBean.class, true);
      return proxy;
   }

   private void createProducerAndSendMessages(int numToSend) throws Exception {
      queue = session.createQueue("test1");
      MessageProducer producer = session.createProducer(queue);
      for (int i = 0; i < numToSend; i++) {
         TextMessage message = session.createTextMessage(MESSAGE_TEXT + i);
         if (i != 0 && i % 50000 == 0) {
            LOG.info("sent: " + i);
         }
         producer.send(message);
      }
      producer.close();
   }

   private void createConsumer(int numToConsume) throws Exception {
      consumer = session.createConsumer(queue);
      // wait for buffer fill out
      for (int i = 0; i < numToConsume; ++i) {
         Message message = consumer.receive(2000);
         message.acknowledge();
      }
      consumer.close();
   }
}
