/**
 * 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.usecases;

import java.io.File;

import javax.jms.Connection;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.Destination;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.store.kahadb.KahaDBPersistenceAdapter;

public class DurableSubscriptionActivationTest extends org.apache.activemq.TestSupport {

   private BrokerService broker;
   private Connection connection;
   private ActiveMQTopic topic;

   protected ActiveMQConnectionFactory createConnectionFactory() throws Exception {
      return new ActiveMQConnectionFactory("vm://" + getName());
   }

   protected Connection createConnection() throws Exception {
      Connection rc = super.createConnection();
      rc.setClientID(getName());
      return rc;
   }

   protected void setUp() throws Exception {
      topic = (ActiveMQTopic) createDestination();
      createBroker(true);
      super.setUp();
   }

   protected void tearDown() throws Exception {
      super.tearDown();
      destroyBroker();
   }

   protected void restartBroker() throws Exception {
      destroyBroker();
      createBroker(false);
   }

   private void createBroker(boolean delete) throws Exception {
      broker = BrokerFactory.createBroker("broker:(vm://localhost)");
      broker.setKeepDurableSubsActive(true);
      broker.setPersistent(true);
      broker.setDeleteAllMessagesOnStartup(delete);
      KahaDBPersistenceAdapter kahadb = new KahaDBPersistenceAdapter();
      kahadb.setDirectory(new File("activemq-data/" + getName() + "-kahadb"));
      kahadb.setJournalMaxFileLength(500 * 1024);
      broker.setPersistenceAdapter(kahadb);
      broker.setBrokerName(getName());

      // only if we pre-create the destinations
      broker.setDestinations(new ActiveMQDestination[]{topic});

      broker.start();
      broker.waitUntilStarted();

      connection = createConnection();
   }

   private void destroyBroker() throws Exception {
      if (connection != null)
         connection.close();
      if (broker != null) {
         broker.stop();
         broker.waitUntilStopped();
      }
   }

   public void testActivateWithExistingTopic() throws Exception {
      // create durable subscription
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      session.createDurableSubscriber(topic, "SubsId");

      Destination d = broker.getDestination(topic);
      assertTrue("More than one consumer found: " + d.getConsumers().size(), d.getConsumers().size() == 1);

      // restart the broker
      restartBroker();

      d = broker.getDestination(topic);
      assertTrue("More than one consumer found: " + d.getConsumers().size(), d.getConsumers().size() == 1);

      // activate
      session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      session.createDurableSubscriber(topic, "SubsId");

      assertTrue("More than one consumer found: " + d.getConsumers().size(), d.getConsumers().size() == 1);

      // re-activate
      connection.close();
      connection = createConnection();
      session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      session.createDurableSubscriber(topic, "SubsId");

      assertTrue("More than one consumer found: " + d.getConsumers().size(), d.getConsumers().size() == 1);
   }

}
