/**
 * 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.transport.discovery;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;

import javax.jms.DeliveryMode;

import junit.framework.Test;

import org.apache.activemq.broker.StubConnection;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ConnectionInfo;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.command.ProducerInfo;
import org.apache.activemq.command.SessionInfo;
import org.apache.activemq.network.NetworkTestSupport;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.transport.failover.FailoverTransport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DiscoveryTransportBrokerTest extends NetworkTestSupport {

   private static final Logger LOG = LoggerFactory.getLogger(DiscoveryTransportBrokerTest.class);

   String groupName;

   public void setUp() throws Exception {
      super.setAutoFail(true);
      super.setUp();
   }

   public void testPublisherFailsOver() throws Exception {
      ActiveMQDestination destination = new ActiveMQQueue("TEST");
      int deliveryMode = DeliveryMode.NON_PERSISTENT;

      // Start a normal consumer on the local broker
      StubConnection connection1 = createConnection();
      ConnectionInfo connectionInfo1 = createConnectionInfo();
      SessionInfo sessionInfo1 = createSessionInfo(connectionInfo1);
      ConsumerInfo consumerInfo1 = createConsumerInfo(sessionInfo1, destination);
      connection1.send(connectionInfo1);
      connection1.send(sessionInfo1);
      connection1.request(consumerInfo1);

      // Start a normal consumer on a remote broker
      StubConnection connection2 = createRemoteConnection();
      ConnectionInfo connectionInfo2 = createConnectionInfo();
      SessionInfo sessionInfo2 = createSessionInfo(connectionInfo2);
      ConsumerInfo consumerInfo2 = createConsumerInfo(sessionInfo2, destination);
      connection2.send(connectionInfo2);
      connection2.send(sessionInfo2);
      connection2.request(consumerInfo2);

      // Start a failover publisher.
      StubConnection connection3 = createFailoverConnection();
      ConnectionInfo connectionInfo3 = createConnectionInfo();
      SessionInfo sessionInfo3 = createSessionInfo(connectionInfo3);
      ProducerInfo producerInfo3 = createProducerInfo(sessionInfo3);
      connection3.send(connectionInfo3);
      connection3.send(sessionInfo3);
      connection3.send(producerInfo3);

      // Send the message using the fail over publisher.
      connection3.request(createMessage(producerInfo3, destination, deliveryMode));

      // The message will be sent to one of the brokers.
      FailoverTransport ft = (FailoverTransport) connection3.getTransport().narrow(FailoverTransport.class);

      // See which broker we were connected to.
      StubConnection connectionA;
      StubConnection connectionB;
      TransportConnector serverA;
      if (connector.getServer().getConnectURI().getPort() == ft.getConnectedTransportURI().getPort()) {
         connectionA = connection1;
         connectionB = connection2;
         serverA = connector;
      }
      else {
         connectionA = connection2;
         connectionB = connection1;
         serverA = remoteConnector;
      }

      assertNotNull(receiveMessage(connectionA));
      assertNoMessagesLeft(connectionB);

      // Dispose the server so that it fails over to the other server.
      LOG.info("Disconnecting active server");
      serverA.stop();

      LOG.info("Sending request that should failover");
      connection3.request(createMessage(producerInfo3, destination, deliveryMode));

      assertNotNull(receiveMessage(connectionB));
      assertNoMessagesLeft(connectionA);

   }

   protected String getLocalURI() {
      return "tcp://localhost:0?wireFormat.tcpNoDelayEnabled=true";
   }

   protected String getRemoteURI() {
      return "tcp://localhost:0?wireFormat.tcpNoDelayEnabled=true";
   }

   protected TransportConnector createConnector() throws Exception, IOException, URISyntaxException {
      TransportConnector x = super.createConnector();
      x.setDiscoveryUri(new URI(getDiscoveryUri()));
      return x;
   }

   protected String getDiscoveryUri() {
      if (groupName == null) {
         groupName = "group-" + System.currentTimeMillis();
      }
      return "multicast://default?group=" + groupName;
   }

   protected TransportConnector createRemoteConnector() throws Exception, IOException, URISyntaxException {
      TransportConnector x = super.createRemoteConnector();
      x.setDiscoveryUri(new URI(getDiscoveryUri()));
      return x;
   }

   protected StubConnection createFailoverConnection() throws Exception {
      URI failoverURI = new URI("discovery:(" + getDiscoveryUri() + ")?startupMaxReconnectAttempts=10&initialReconnectDelay=1000");
      Transport transport = TransportFactory.connect(failoverURI);
      StubConnection connection = new StubConnection(transport);
      connections.add(connection);
      return connection;
   }

   public static Test suite() {
      return suite(DiscoveryTransportBrokerTest.class);
   }

   public static void main(String[] args) {
      junit.textui.TestRunner.run(suite());
   }

}
