/**
 * 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.broker;

import java.io.File;
import java.io.IOException;
import java.util.Set;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.TestSupport;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.broker.scheduler.JobSchedulerStore;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.ProducerId;
import org.apache.activemq.store.MessageStore;
import org.apache.activemq.store.PersistenceAdapter;
import org.apache.activemq.store.ProxyMessageStore;
import org.apache.activemq.store.ProxyTopicMessageStore;
import org.apache.activemq.store.TopicMessageStore;
import org.apache.activemq.store.TransactionStore;
import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter;
import org.apache.activemq.transport.tcp.TcpTransport;
import org.apache.activemq.usage.SystemUsage;
import org.junit.After;
import org.junit.Before;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class RedeliveryRestartWithExceptionTest extends TestSupport {

   private static final transient Logger LOG = LoggerFactory.getLogger(RedeliveryRestartWithExceptionTest.class);
   ActiveMQConnection connection;
   BrokerService broker = null;
   String queueName = "redeliveryRestartQ";

   @Override
   @Before
   public void setUp() throws Exception {
      super.setUp();
      broker = new BrokerService();
      configureBroker(broker, true);
      broker.setDeleteAllMessagesOnStartup(true);
      broker.start();
   }

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

   protected void configureBroker(BrokerService broker, boolean throwExceptionOnUpdate) throws Exception {
      PolicyMap policyMap = new PolicyMap();
      PolicyEntry policy = new PolicyEntry();
      policy.setPersistJMSRedelivered(true);
      policyMap.setDefaultEntry(policy);
      broker.setDestinationPolicy(policyMap);
      broker.setPersistenceAdapter(new KahaDBWithUpdateExceptionPersistenceAdapter(throwExceptionOnUpdate));
      broker.addConnector("tcp://0.0.0.0:0");
   }

   @org.junit.Test
   public void testValidateRedeliveryFlagAfterRestart() throws Exception {

      ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getPublishableConnectString() + "?jms.prefetchPolicy.all=0");
      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      Destination destination = session.createQueue(queueName);
      populateDestination(10, destination, connection, true);
      TextMessage msg = null;
      MessageConsumer consumer = session.createConsumer(destination);
      Exception expectedException = null;
      try {
         for (int i = 0; i < 5; i++) {
            msg = (TextMessage) consumer.receive(5000);
            LOG.info("not redelivered? got: " + msg);
            assertNotNull("got the message", msg);
            assertTrue("Should not receive the 5th message", i < 4);
            //The first 4 messages will be ok but the 5th one should hit an exception in updateMessage and should not be delivered
         }
      }
      catch (Exception e) {
         //Expecting an exception and disconnect on the 5th message
         LOG.info("Got expected:", e);
         expectedException = e;
      }
      assertNotNull("Expecting an exception when updateMessage fails", expectedException);

      consumer.close();
      connection.close();

      restartBroker();

      connectionFactory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getPublishableConnectString() + "?jms.prefetchPolicy.all=0");
      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      destination = session.createQueue(queueName);
      consumer = session.createConsumer(destination);

      // consume the messages that were previously delivered
      for (int i = 0; i < 4; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("redelivered? got: " + msg);
         assertNotNull("got the message again", msg);
         assertEquals("re delivery flag", true, msg.getJMSRedelivered());
         assertTrue("redelivery count survives restart", msg.getLongProperty("JMSXDeliveryCount") > 1);
         msg.acknowledge();
      }

      // consume the rest that were not redeliveries
      for (int i = 0; i < 6; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("not redelivered? got: " + msg);
         assertNotNull("got the message", msg);
         assertEquals("not a redelivery", false, msg.getJMSRedelivered());
         assertEquals("first delivery", 1, msg.getLongProperty("JMSXDeliveryCount"));
         msg.acknowledge();
      }
      connection.close();
   }

   @org.junit.Test
   public void testValidateRedeliveryFlagAfterTransientFailureConnectionDrop() throws Exception {

      ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getPublishableConnectString() + "?jms.prefetchPolicy.all=0");
      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      Destination destination = session.createQueue(queueName);
      populateDestination(10, destination, connection, true);
      TextMessage msg = null;
      MessageConsumer consumer = session.createConsumer(destination);
      Exception expectedException = null;
      try {
         for (int i = 0; i < 5; i++) {
            msg = (TextMessage) consumer.receive(5000);
            LOG.info("not redelivered? got: " + msg);
            assertNotNull("got the message", msg);
            assertTrue("Should not receive the 5th message", i < 4);
            //The first 4 messages will be ok but the 5th one should hit an exception in updateMessage and should not be delivered
         }
      }
      catch (Exception e) {
         //Expecting an exception and disconnect on the 5th message
         LOG.info("Got expected:", e);
         expectedException = e;
      }
      assertNotNull("Expecting an exception when updateMessage fails", expectedException);

      consumer.close();
      connection.close();

      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      destination = session.createQueue(queueName);
      consumer = session.createConsumer(destination);

      // consume the messages that were previously delivered
      for (int i = 0; i < 4; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("redelivered? got: " + msg);
         assertNotNull("got the message again", msg);
         assertEquals("re delivery flag on:" + i, true, msg.getJMSRedelivered());
         assertTrue("redelivery count survives reconnect for:" + i, msg.getLongProperty("JMSXDeliveryCount") > 1);
         msg.acknowledge();
      }

      // consume the rest that were not redeliveries
      for (int i = 0; i < 6; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("not redelivered? got: " + msg);
         assertNotNull("got the message", msg);
         assertEquals("not a redelivery", false, msg.getJMSRedelivered());
         assertEquals("first delivery", 1, msg.getLongProperty("JMSXDeliveryCount"));
         msg.acknowledge();
      }
      connection.close();
   }

   @org.junit.Test
   public void testValidateRedeliveryFlagOnNonPersistentAfterTransientFailureConnectionDrop() throws Exception {

      ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(broker.getTransportConnectors().get(0).getPublishableConnectString() + "?jms.prefetchPolicy.all=0");
      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      Destination destination = session.createQueue(queueName);
      populateDestination(10, destination, connection, false);
      TextMessage msg = null;
      MessageConsumer consumer = session.createConsumer(destination);
      for (int i = 0; i < 5; i++) {
         msg = (TextMessage) consumer.receive(5000);
         assertNotNull("got the message", msg);
         assertFalse("not redelivered", msg.getJMSRedelivered());
      }

      connection.getTransport().narrow(TcpTransport.class).getTransportListener().onException(new IOException("Die"));

      connection = (ActiveMQConnection) connectionFactory.createConnection();
      connection.start();

      session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      destination = session.createQueue(queueName);
      consumer = session.createConsumer(destination);

      // consume the messages that were previously delivered
      for (int i = 0; i < 5; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("redelivered? got: " + msg);
         assertNotNull("got the message again", msg);
         assertEquals("redelivery flag set on:" + i, true, msg.getJMSRedelivered());
         assertTrue("redelivery count survives reconnect for:" + i, msg.getLongProperty("JMSXDeliveryCount") > 1);
         msg.acknowledge();
      }

      // consume the rest that were not redeliveries
      for (int i = 0; i < 5; i++) {
         msg = (TextMessage) consumer.receive(4000);
         LOG.info("not redelivered? got: " + msg);
         assertNotNull("got the message", msg);
         assertEquals("not a redelivery", false, msg.getJMSRedelivered());
         assertEquals("first delivery", 1, msg.getLongProperty("JMSXDeliveryCount"));
         msg.acknowledge();
      }
      connection.close();
   }

   private void restartBroker() throws Exception {
      broker.stop();
      broker.waitUntilStopped();
      broker = createRestartedBroker();
      broker.start();
   }

   private BrokerService createRestartedBroker() throws Exception {
      broker = new BrokerService();
      configureBroker(broker, false);
      return broker;
   }

   private void populateDestination(final int nbMessages,
                                    final Destination destination,
                                    javax.jms.Connection connection,
                                    boolean persistent) throws JMSException {
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer producer = session.createProducer(destination);
      producer.setDeliveryMode(persistent ? DeliveryMode.PERSISTENT : DeliveryMode.NON_PERSISTENT);
      for (int i = 1; i <= nbMessages; i++) {
         producer.send(session.createTextMessage("<hello id='" + i + "'/>"));
      }
      producer.close();
      session.close();
   }

   private class KahaDBWithUpdateExceptionPersistenceAdapter implements PersistenceAdapter {

      private KahaDBPersistenceAdapter kahaDB = new KahaDBPersistenceAdapter();
      private boolean throwExceptionOnUpdate;

      public KahaDBWithUpdateExceptionPersistenceAdapter(boolean throwExceptionOnUpdate) {
         this.throwExceptionOnUpdate = throwExceptionOnUpdate;
      }

      @Override
      public void start() throws Exception {
         kahaDB.start();
      }

      @Override
      public void stop() throws Exception {
         kahaDB.stop();
      }

      @Override
      public Set<ActiveMQDestination> getDestinations() {
         return kahaDB.getDestinations();
      }

      @Override
      public MessageStore createQueueMessageStore(ActiveMQQueue destination) throws IOException {
         MessageStore proxyMessageStoreWithException = new ProxyMessageStoreWithUpdateException(kahaDB.createQueueMessageStore(destination), throwExceptionOnUpdate);
         return proxyMessageStoreWithException;
      }

      @Override
      public TopicMessageStore createTopicMessageStore(ActiveMQTopic destination) throws IOException {
         TopicMessageStore proxyMessageStoreWithException = new ProxyTopicMessageStoreWithUpdateException(kahaDB.createTopicMessageStore(destination), throwExceptionOnUpdate);
         return proxyMessageStoreWithException;
      }

      @Override
      public JobSchedulerStore createJobSchedulerStore() throws IOException, UnsupportedOperationException {
         return kahaDB.createJobSchedulerStore();
      }

      @Override
      public void removeQueueMessageStore(ActiveMQQueue destination) {
         kahaDB.removeQueueMessageStore(destination);
      }

      @Override
      public void removeTopicMessageStore(ActiveMQTopic destination) {
         kahaDB.removeTopicMessageStore(destination);
      }

      @Override
      public TransactionStore createTransactionStore() throws IOException {
         return kahaDB.createTransactionStore();
      }

      @Override
      public void beginTransaction(ConnectionContext context) throws IOException {
         kahaDB.beginTransaction(context);
      }

      @Override
      public void commitTransaction(ConnectionContext context) throws IOException {
         kahaDB.commitTransaction(context);
      }

      @Override
      public void rollbackTransaction(ConnectionContext context) throws IOException {
         kahaDB.rollbackTransaction(context);
      }

      @Override
      public long getLastMessageBrokerSequenceId() throws IOException {
         return kahaDB.getLastMessageBrokerSequenceId();
      }

      @Override
      public void deleteAllMessages() throws IOException {
         kahaDB.deleteAllMessages();
      }

      @Override
      public void setUsageManager(SystemUsage usageManager) {
         kahaDB.setUsageManager(usageManager);
      }

      @Override
      public void setBrokerName(String brokerName) {
         kahaDB.setBrokerName(brokerName);
      }

      @Override
      public void setDirectory(File dir) {
         kahaDB.setDirectory(dir);
      }

      @Override
      public File getDirectory() {
         return kahaDB.getDirectory();
      }

      @Override
      public void checkpoint(boolean sync) throws IOException {
         kahaDB.checkpoint(sync);
      }

      @Override
      public long size() {
         return kahaDB.size();
      }

      @Override
      public long getLastProducerSequenceId(ProducerId id) throws IOException {
         return kahaDB.getLastProducerSequenceId(id);
      }

   }

   private class ProxyMessageStoreWithUpdateException extends ProxyMessageStore {

      private boolean throwExceptionOnUpdate;
      private int numBeforeException = 4;

      public ProxyMessageStoreWithUpdateException(MessageStore delegate, boolean throwExceptionOnUpdate) {
         super(delegate);
         this.throwExceptionOnUpdate = throwExceptionOnUpdate;
      }

      @Override
      public void updateMessage(Message message) throws IOException {
         if (throwExceptionOnUpdate) {
            if (numBeforeException > 0) {
               numBeforeException--;
               super.updateMessage(message);
            }
            else {
               // lets only do it once so we can validate transient store failure
               throwExceptionOnUpdate = false;

               //A message that has never been delivered will hit this exception
               throw new IOException("Hit our simulated exception writing the update to disk");
            }
         }
         else {
            super.updateMessage(message);
         }
      }
   }

   private class ProxyTopicMessageStoreWithUpdateException extends ProxyTopicMessageStore {

      private boolean throwExceptionOnUpdate;
      private int numBeforeException = 4;

      public ProxyTopicMessageStoreWithUpdateException(TopicMessageStore delegate, boolean throwExceptionOnUpdate) {
         super(delegate);
         this.throwExceptionOnUpdate = throwExceptionOnUpdate;
      }

      @Override
      public void updateMessage(Message message) throws IOException {
         if (throwExceptionOnUpdate) {
            if (numBeforeException > 0) {
               numBeforeException--;
               super.updateMessage(message);
            }
            else {
               //A message that has never been delivered will hit this exception
               throw new IOException("Hit our simulated exception writing the update to disk");
            }
         }
         else {
            super.updateMessage(message);
         }
      }
   }
}