/**
 * 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.region;

import javax.jms.Connection;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import java.util.concurrent.TimeUnit;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.EmbeddedBrokerTestSupport;
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.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.util.Wait;
import org.apache.activemq.util.Wait.Condition;

public class DestinationGCTest extends EmbeddedBrokerTestSupport {

   ActiveMQQueue queue = new ActiveMQQueue("TEST");
   ActiveMQQueue otherQueue = new ActiveMQQueue("TEST-OTHER");

   @Override
   protected BrokerService createBroker() throws Exception {
      BrokerService broker = super.createBroker();
      broker.setDestinations(new ActiveMQDestination[]{queue});
      broker.setSchedulePeriodForDestinationPurge(1000);
      broker.setMaxPurgedDestinationsPerSweep(1);
      PolicyEntry entry = new PolicyEntry();
      entry.setGcInactiveDestinations(true);
      entry.setInactiveTimeoutBeforeGC(3000);
      PolicyMap map = new PolicyMap();
      map.setDefaultEntry(entry);
      broker.setDestinationPolicy(map);
      return broker;
   }

   public void testDestinationGCWithActiveConsumers() throws Exception {
      assertEquals(1, broker.getAdminView().getQueues().length);

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost?create=false");
      Connection connection = factory.createConnection();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      session.createProducer(otherQueue).close();
      MessageConsumer consumer = session.createConsumer(queue);
      consumer.setMessageListener(new MessageListener() {

         @Override
         public void onMessage(Message message) {
         }
      });
      connection.start();

      TimeUnit.SECONDS.sleep(5);

      assertTrue("After GC runs there should be one Queue.", Wait.waitFor(new Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return broker.getAdminView().getQueues().length == 1;
         }
      }));

      connection.close();
   }

   public void testDestinationGc() throws Exception {
      assertEquals(1, broker.getAdminView().getQueues().length);
      assertTrue("After GC runs the Queue should be empty.", Wait.waitFor(new Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return broker.getAdminView().getQueues().length == 0;
         }
      }));
   }

   public void testDestinationGcLimit() throws Exception {

      broker.getAdminView().addQueue("TEST1");
      broker.getAdminView().addQueue("TEST2");
      broker.getAdminView().addQueue("TEST3");
      broker.getAdminView().addQueue("TEST4");

      assertEquals(5, broker.getAdminView().getQueues().length);
      Thread.sleep(7000);
      int queues = broker.getAdminView().getQueues().length;
      assertTrue(queues > 0 && queues < 5);
      assertTrue("After GC runs the Queue should be empty.", Wait.waitFor(new Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return broker.getAdminView().getQueues().length == 0;
         }
      }));
   }
}
