/**
 * 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 java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
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 org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.apache.activemq.util.IOHelper;

public class AMQ2512Test extends EmbeddedBrokerTestSupport {

   private static Connection connection;
   private final static String QUEUE_NAME = "dee.q";
   private final static int INITIAL_MESSAGES_CNT = 1000;
   private final static int WORKER_INTERNAL_ITERATIONS = 100;
   private final static int TOTAL_MESSAGES_CNT = INITIAL_MESSAGES_CNT * WORKER_INTERNAL_ITERATIONS + INITIAL_MESSAGES_CNT;
   private final static byte[] payload = new byte[5 * 1024];
   private final static String TEXT = new String(payload);

   private final static String PRP_INITIAL_ID = "initial-id";
   private final static String PRP_WORKER_ID = "worker-id";

   private final static CountDownLatch LATCH = new CountDownLatch(TOTAL_MESSAGES_CNT);

   private final static AtomicInteger ON_MSG_COUNTER = new AtomicInteger();

   public void testKahaDBFailure() throws Exception {
      final ConnectionFactory fac = new ActiveMQConnectionFactory(this.bindAddress);
      connection = fac.createConnection();
      final Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      final Queue queue = session.createQueue(QUEUE_NAME);
      final MessageProducer producer = session.createProducer(queue);
      producer.setDeliveryMode(DeliveryMode.PERSISTENT);
      connection.start();

      final long startTime = System.nanoTime();

      final List<Consumer> consumers = new ArrayList<Consumer>();
      for (int i = 0; i < 20; i++) {
         consumers.add(new Consumer("worker-" + i));
      }

      for (int i = 0; i < INITIAL_MESSAGES_CNT; i++) {
         final TextMessage msg = session.createTextMessage(TEXT);
         msg.setStringProperty(PRP_INITIAL_ID, "initial-" + i);
         producer.send(msg);
      }

      LATCH.await();
      final long endTime = System.nanoTime();
      System.out.println("Total execution time = " + TimeUnit.MILLISECONDS.convert(endTime - startTime, TimeUnit.NANOSECONDS) + " [ms].");
      System.out.println("Rate = " + TOTAL_MESSAGES_CNT / TimeUnit.SECONDS.convert(endTime - startTime, TimeUnit.NANOSECONDS) + " [msg/s].");

      for (Consumer c : consumers) {
         c.close();
      }
      connection.close();
   }

   private final static class Consumer implements MessageListener {

      private final String name;
      private final Session session;
      private final MessageProducer producer;

      private Consumer(String name) {
         this.name = name;
         try {
            session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
            final Queue queue = session.createQueue(QUEUE_NAME + "?consumer.prefetchSize=10");
            producer = session.createProducer(queue);
            producer.setDeliveryMode(DeliveryMode.PERSISTENT);
            final MessageConsumer consumer = session.createConsumer(queue);
            consumer.setMessageListener(this);
         }
         catch (JMSException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
         }
      }

      public void onMessage(Message message) {
         final TextMessage msg = (TextMessage) message;
         try {
            if (!msg.propertyExists(PRP_WORKER_ID)) {
               for (int i = 0; i < WORKER_INTERNAL_ITERATIONS; i++) {
                  final TextMessage newMsg = session.createTextMessage(msg.getText());
                  newMsg.setStringProperty(PRP_WORKER_ID, name + "-" + i);
                  newMsg.setStringProperty(PRP_INITIAL_ID, msg.getStringProperty(PRP_INITIAL_ID));
                  producer.send(newMsg);
               }
            }
            msg.acknowledge();

         }
         catch (JMSException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
         }
         finally {
            final int onMsgCounter = ON_MSG_COUNTER.getAndIncrement();
            if (onMsgCounter % 1000 == 0) {
               System.out.println("message received: " + onMsgCounter);
            }
            LATCH.countDown();
         }
      }

      private void close() {
         if (session != null) {
            try {
               session.close();
            }
            catch (JMSException e) {
               e.printStackTrace();
               throw new RuntimeException(e);
            }
         }
      }
   }

   @Override
   protected void setUp() throws Exception {
      bindAddress = "tcp://0.0.0.0:61617";
      super.setUp();
   }

   @Override
   protected BrokerService createBroker() throws Exception {
      File dataFileDir = new File("target/test-amq-2512/datadb");
      IOHelper.mkdirs(dataFileDir);
      IOHelper.deleteChildren(dataFileDir);
      KahaDBStore kaha = new KahaDBStore();
      kaha.setDirectory(dataFileDir);
      BrokerService answer = new BrokerService();
      answer.setPersistenceAdapter(kaha);

      kaha.setEnableJournalDiskSyncs(false);
      //kaha.setIndexCacheSize(10);
      answer.setDataDirectoryFile(dataFileDir);
      answer.setUseJmx(false);
      answer.addConnector(bindAddress);
      return answer;
   }
}
