/**
 * 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.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.ResourceAllocationException;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.ActiveMQPrefetchPolicy;
import org.apache.activemq.TestSupport;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.store.kahadb.plist.PListStoreImpl;
import org.apache.activemq.usage.MemoryUsage;
import org.apache.activemq.usage.StoreUsage;
import org.apache.activemq.usage.SystemUsage;
import org.apache.activemq.usage.TempUsage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TempStorageBlockedBrokerTest extends TestSupport {

   public int deliveryMode = DeliveryMode.PERSISTENT;

   private static final Logger LOG = LoggerFactory.getLogger(TempStorageBlockedBrokerTest.class);
   private static final int MESSAGES_COUNT = 1000;
   private static byte[] buf = new byte[4 * 1024];
   private BrokerService broker;
   AtomicInteger messagesSent = new AtomicInteger(0);
   AtomicInteger messagesConsumed = new AtomicInteger(0);

   protected long messageReceiveTimeout = 10000L;

   Destination destination = new ActiveMQTopic("FooTwo");

   private String connectionUri;

   public void testRunProducerWithHungConsumer() throws Exception {

      final long origTempUsage = broker.getSystemUsage().getTempUsage().getUsage();

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(connectionUri);
      // ensure messages are spooled to disk for this consumer
      ActiveMQPrefetchPolicy prefetch = new ActiveMQPrefetchPolicy();
      prefetch.setTopicPrefetch(10);
      factory.setPrefetchPolicy(prefetch);
      Connection consumerConnection = factory.createConnection();
      consumerConnection.start();

      Session consumerSession = consumerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageConsumer consumer = consumerSession.createConsumer(destination);

      final Connection producerConnection = factory.createConnection();
      producerConnection.start();

      final CountDownLatch producerHasSentTenMessages = new CountDownLatch(10);
      Thread producingThread = new Thread("Producing thread") {
         @Override
         public void run() {
            try {
               Session session = producerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
               MessageProducer producer = session.createProducer(destination);
               producer.setDeliveryMode(deliveryMode);
               for (int idx = 0; idx < MESSAGES_COUNT; ++idx) {
                  Message message = session.createTextMessage(new String(buf) + idx);

                  producer.send(message);
                  messagesSent.incrementAndGet();
                  producerHasSentTenMessages.countDown();
                  Thread.sleep(10);
                  if (idx != 0 && idx % 100 == 0) {
                     LOG.info("Sent Message " + idx);
                     LOG.info("Temp Store Usage " + broker.getSystemUsage().getTempUsage().getUsage());
                  }
               }
               producer.close();
               session.close();
            }
            catch (Throwable ex) {
               ex.printStackTrace();
            }
         }
      };
      producingThread.start();

      assertTrue("producer has sent 10 in a reasonable time", producerHasSentTenMessages.await(30, TimeUnit.SECONDS));

      int count = 0;

      Message m = null;
      while ((m = consumer.receive(messageReceiveTimeout)) != null) {
         count++;
         if (count != 0 && count % 10 == 0) {
            LOG.info("Received Message (" + count + "):" + m);
         }
         messagesConsumed.incrementAndGet();
         try {
            Thread.sleep(100);
         }
         catch (Exception e) {
            LOG.info("error sleeping");
         }
      }

      LOG.info("Connection Timeout: Retrying.. count: " + count);

      while ((m = consumer.receive(messageReceiveTimeout)) != null) {
         count++;
         if (count != 0 && count % 100 == 0) {
            LOG.info("Received Message (" + count + "):" + m);
         }
         messagesConsumed.incrementAndGet();
         try {
            Thread.sleep(100);
         }
         catch (Exception e) {
            LOG.info("error sleeping");
         }
      }

      LOG.info("consumer session closing: consumed count: " + count);

      consumerSession.close();

      producingThread.join();

      final long tempUsageBySubscription = broker.getSystemUsage().getTempUsage().getUsage();
      LOG.info("Orig Usage: " + origTempUsage + ", currentUsage: " + tempUsageBySubscription);

      producerConnection.close();
      consumerConnection.close();

      LOG.info("Subscrition Usage: " + tempUsageBySubscription + ", endUsage: " + broker.getSystemUsage().getTempUsage().getUsage());

      // do a cleanup
      ((PListStoreImpl) broker.getTempDataStore()).run();
      LOG.info("Subscrition Usage: " + tempUsageBySubscription + ", endUsage: " + broker.getSystemUsage().getTempUsage().getUsage());

      assertEquals("Incorrect number of Messages Sent: " + messagesSent.get(), messagesSent.get(), MESSAGES_COUNT);
      assertEquals("Incorrect number of Messages Consumed: " + messagesConsumed.get(), messagesConsumed.get(), MESSAGES_COUNT);
   }

   public void testFillTempAndConsume() throws Exception {

      broker.getSystemUsage().setSendFailIfNoSpace(true);
      destination = new ActiveMQQueue("Foo");

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(connectionUri);
      final ActiveMQConnection producerConnection = (ActiveMQConnection) factory.createConnection();
      // so we can easily catch the ResourceAllocationException on send
      producerConnection.setAlwaysSyncSend(true);
      producerConnection.start();

      Session session = producerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer producer = session.createProducer(destination);
      producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);

      try {
         while (true) {
            Message message = session.createTextMessage(new String(buf) + messagesSent.toString());
            producer.send(message);
            messagesSent.incrementAndGet();
            if (messagesSent.get() % 100 == 0) {
               LOG.info("Sent Message " + messagesSent.get());
               LOG.info("Temp Store Usage " + broker.getSystemUsage().getTempUsage().getUsage());
            }
         }
      }
      catch (ResourceAllocationException ex) {
         LOG.info("Got resource exception : " + ex + ", after sent: " + messagesSent.get());
      }

      // consume all sent
      Connection consumerConnection = factory.createConnection();
      consumerConnection.start();

      Session consumerSession = consumerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageConsumer consumer = consumerSession.createConsumer(destination);

      while (consumer.receive(messageReceiveTimeout) != null) {
         messagesConsumed.incrementAndGet();
         if (messagesConsumed.get() % 1000 == 0) {
            LOG.info("received Message " + messagesConsumed.get());
            LOG.info("Temp Store Usage " + broker.getSystemUsage().getTempUsage().getUsage());
         }
      }

      assertEquals("Incorrect number of Messages Consumed: " + messagesConsumed.get(), messagesConsumed.get(), messagesSent.get());
   }

   @Override
   public void setUp() throws Exception {

      broker = new BrokerService();
      broker.setDataDirectory("target" + File.separator + "activemq-data");
      broker.setPersistent(true);
      broker.setUseJmx(true);
      broker.setAdvisorySupport(false);
      broker.setDeleteAllMessagesOnStartup(true);

      setDefaultPersistenceAdapter(broker);
      SystemUsage sysUsage = broker.getSystemUsage();
      MemoryUsage memUsage = new MemoryUsage();
      memUsage.setLimit((1024 * 1024));
      StoreUsage storeUsage = new StoreUsage();
      storeUsage.setLimit((1024 * 1024) * 38);
      TempUsage tmpUsage = new TempUsage();
      tmpUsage.setLimit((1024 * 1024) * 38);

      PolicyEntry defaultPolicy = new PolicyEntry();
      // defaultPolicy.setTopic("FooTwo");
      defaultPolicy.setProducerFlowControl(false);
      defaultPolicy.setMemoryLimit(10 * 1024);

      PolicyMap policyMap = new PolicyMap();
      policyMap.setDefaultEntry(defaultPolicy);

      sysUsage.setMemoryUsage(memUsage);
      sysUsage.setStoreUsage(storeUsage);
      sysUsage.setTempUsage(tmpUsage);

      broker.setDestinationPolicy(policyMap);
      broker.setSystemUsage(sysUsage);

      broker.addConnector("tcp://localhost:0").setName("Default");
      broker.start();

      connectionUri = broker.getTransportConnectors().get(0).getPublishableConnectString();
   }

   @Override
   public void tearDown() throws Exception {
      if (broker != null) {
         broker.stop();
      }
   }

}
