/**
 * 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.usage;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.Session;
import java.io.File;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.EmbeddedBrokerTestSupport;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.util.IOHelper;
import org.apache.activemq.util.ProducerThread;
import org.apache.activemq.util.Wait;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JobSchedulerStoreUsageTest extends EmbeddedBrokerTestSupport {

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

   final int WAIT_TIME_MILLS = 20 * 1000;

   @Override
   protected BrokerService createBroker() throws Exception {
      File schedulerDirectory = new File("target/scheduler");

      IOHelper.mkdirs(schedulerDirectory);
      IOHelper.deleteChildren(schedulerDirectory);

      BrokerService broker = super.createBroker();
      broker.setSchedulerSupport(true);
      broker.setSchedulerDirectoryFile(schedulerDirectory);
      broker.getSystemUsage().getJobSchedulerUsage().setLimit(7 * 1024);
      broker.deleteAllMessages();
      return broker;
   }

   @Override
   protected boolean isPersistent() {
      return true;
   }

   public void testJmx() throws Exception {

      LOG.info("Initial scheduler usage: {}", broker.getAdminView().getJobSchedulerStorePercentUsage());

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("vm://localhost");
      Connection conn = factory.createConnection();
      conn.start();
      Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Destination dest = sess.createQueue(this.getClass().getName());
      final ProducerThread producer = new ProducerThread(sess, dest) {
         @Override
         protected Message createMessage(int i) throws Exception {
            Message message = super.createMessage(i);
            message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, WAIT_TIME_MILLS / 2);
            return message;
         }
      };
      producer.setMessageCount(100);
      producer.start();

      assertEquals(7 * 1024, broker.getAdminView().getJobSchedulerStoreLimit());

      // wait for the producer to block
      Thread.sleep(WAIT_TIME_MILLS / 2);

      assertTrue(broker.getAdminView().getJobSchedulerStorePercentUsage() > 100);

      broker.getAdminView().setJobSchedulerStoreLimit(1024 * 1024 * 33);

      Thread.sleep(WAIT_TIME_MILLS);

      Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return producer.getSentCount() == producer.getMessageCount();
         }
      }, WAIT_TIME_MILLS * 2);

      assertEquals("Producer didn't send all messages", producer.getMessageCount(), producer.getSentCount());

      LOG.info("Final scheduler usage: {}", broker.getAdminView().getJobSchedulerStorePercentUsage());

      assertTrue(broker.getAdminView().getJobSchedulerStorePercentUsage() < 100);
   }
}
