/**
 * 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.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.util.Vector;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

import javax.jms.BytesMessage;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ConnectionControl;
import org.junit.After;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AMQ4157Test {

   static final Logger LOG = LoggerFactory.getLogger(AMQ4157Test.class);
   private BrokerService broker;
   private ActiveMQConnectionFactory connectionFactory;
   private final Destination destination = new ActiveMQQueue("Test");
   private final String payloadString = new String(new byte[8 * 1024]);
   private final boolean useBytesMessage = true;
   private final int parallelProducer = 20;
   private final int parallelConsumer = 100;

   private final Vector<Exception> exceptions = new Vector<Exception>();
   long toSend = 1000;

   @Test
   public void testPublishCountsWithRollbackConsumer() throws Exception {

      startBroker(true);

      final AtomicLong sharedCount = new AtomicLong(toSend);
      ExecutorService executorService = Executors.newCachedThreadPool();

      for (int i = 0; i < parallelConsumer; i++) {
         executorService.execute(new Runnable() {
            @Override
            public void run() {
               try {
                  consumeOneAndRollback();
               }
               catch (Exception e) {
                  exceptions.add(e);
               }
            }
         });
      }

      for (int i = 0; i < parallelProducer; i++) {
         executorService.execute(new Runnable() {
            @Override
            public void run() {
               try {
                  publishMessages(sharedCount, 0);
               }
               catch (Exception e) {
                  exceptions.add(e);
               }
            }
         });
      }

      executorService.shutdown();
      executorService.awaitTermination(30, TimeUnit.MINUTES);
      assertTrue("Producers done in time", executorService.isTerminated());
      assertTrue("No exceptions: " + exceptions, exceptions.isEmpty());

      restartBroker(500);

      LOG.info("Attempting consume of {} messages", toSend);

      consumeMessages(toSend);
   }

   private void consumeOneAndRollback() throws Exception {
      ActiveMQConnection connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();
      Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
      MessageConsumer consumer = session.createConsumer(destination);
      Message message = null;
      while (message == null) {
         message = consumer.receive(1000);
      }
      session.rollback();
      connection.close();
   }

   private void consumeMessages(long count) throws Exception {
      ActiveMQConnection connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageConsumer consumer = session.createConsumer(destination);
      for (int i = 0; i < count; i++) {
         assertNotNull("got message " + i, consumer.receive(20000));
      }
      assertNull("none left over", consumer.receive(2000));
   }

   private void restartBroker(int restartDelay) throws Exception {
      stopBroker();
      TimeUnit.MILLISECONDS.sleep(restartDelay);
      startBroker(false);
   }

   @After
   public void stopBroker() throws Exception {
      if (broker != null) {
         broker.stop();
         broker.waitUntilStopped();
      }
   }

   private void publishMessages(AtomicLong count, int expiry) throws Exception {
      ActiveMQConnection connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.setWatchTopicAdvisories(false);
      connection.start();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

      MessageProducer producer = session.createProducer(destination);
      while ((count.getAndDecrement()) > 0) {
         Message message = null;
         if (useBytesMessage) {
            message = session.createBytesMessage();
            ((BytesMessage) message).writeBytes(payloadString.getBytes());
         }
         else {
            message = session.createTextMessage(payloadString);
         }
         producer.send(message, DeliveryMode.PERSISTENT, 5, expiry);
      }
      connection.syncSendPacket(new ConnectionControl());
      connection.close();
   }

   public void startBroker(boolean deleteAllMessages) throws Exception {
      broker = new BrokerService();
      broker.setDeleteAllMessagesOnStartup(deleteAllMessages);
      broker.addConnector("tcp://0.0.0.0:0");
      broker.start();

      String options = "?jms.redeliveryPolicy.maximumRedeliveries=-1&jms.prefetchPolicy.all=1000&jms.watchTopicAdvisories=false&jms.useAsyncSend=true&jms.alwaysSessionAsync=false&jms.dispatchAsync=false&socketBufferSize=131072&ioBufferSize=16384&wireFormat.tightEncodingEnabled=false&wireFormat.cacheSize=8192";
      connectionFactory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getConnectUri() + options);
   }
}