/**
 * 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.scheduler;

import javax.jms.Connection;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.io.File;
import java.io.IOException;
import java.security.ProtectionDomain;
import java.util.concurrent.TimeUnit;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.store.kahadb.scheduler.JobSchedulerStoreImpl;
import org.apache.activemq.util.IOHelper;
import org.apache.activemq.util.Wait;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

public class KahaDBSchedulerIndexRebuildTest {

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

   private BrokerService broker = null;
   private final int NUM_JOBS = 50;

   static String basedir;

   static {
      try {
         ProtectionDomain protectionDomain = SchedulerDBVersionTest.class.getProtectionDomain();
         basedir = new File(new File(protectionDomain.getCodeSource().getLocation().getPath()), "../.").getCanonicalPath();
      } catch (IOException e) {
         basedir = ".";
      }
   }

   private final File schedulerStoreDir = new File(basedir, "activemq-data/store/scheduler");
   private final File storeDir = new File(basedir, "activemq-data/store/");

   @Before
   public void setUp() throws Exception {
      LOG.info("Test Dir = {}", schedulerStoreDir);
   }

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

   @Test
   public void testIndexRebuilds() throws Exception {
      IOHelper.deleteFile(schedulerStoreDir);

      JobSchedulerStoreImpl schedulerStore = createScheduler();
      broker = createBroker(schedulerStore);
      broker.start();
      ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost");
      Connection connection = cf.createConnection();
      connection.start();
      for (int i = 0; i < NUM_JOBS; ++i) {
         scheduleRepeating(connection);
      }
      connection.close();

      JobScheduler scheduler = schedulerStore.getJobScheduler("JMS");
      assertNotNull(scheduler);
      assertEquals(NUM_JOBS, scheduler.getAllJobs().size());

      broker.stop();

      IOHelper.delete(new File(schedulerStoreDir, "scheduleDB.data"));

      schedulerStore = createScheduler();
      broker = createBroker(schedulerStore);
      broker.start();

      scheduler = schedulerStore.getJobScheduler("JMS");
      assertNotNull(scheduler);
      assertEquals(NUM_JOBS, scheduler.getAllJobs().size());
   }

   @Test
   public void testIndexRebuildsAfterSomeJobsExpire() throws Exception {
      IOHelper.deleteFile(schedulerStoreDir);

      JobSchedulerStoreImpl schedulerStore = createScheduler();
      broker = createBroker(schedulerStore);
      broker.start();
      ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost");
      Connection connection = cf.createConnection();
      connection.start();
      for (int i = 0; i < NUM_JOBS; ++i) {
         scheduleRepeating(connection);
         scheduleOneShot(connection);
      }
      connection.close();

      JobScheduler scheduler = schedulerStore.getJobScheduler("JMS");
      assertNotNull(scheduler);
      assertEquals(NUM_JOBS * 2, scheduler.getAllJobs().size());

      final JobScheduler awaitingOneShotTimeout = scheduler;
      assertTrue("One shot jobs should time out", Wait.waitFor(new Wait.Condition() {

         @Override
         public boolean isSatisified() throws Exception {
            return awaitingOneShotTimeout.getAllJobs().size() == NUM_JOBS;
         }
      }, TimeUnit.MINUTES.toMillis(2)));

      broker.stop();

      IOHelper.delete(new File(schedulerStoreDir, "scheduleDB.data"));

      schedulerStore = createScheduler();
      broker = createBroker(schedulerStore);
      broker.start();

      scheduler = schedulerStore.getJobScheduler("JMS");
      assertNotNull(scheduler);
      assertEquals(NUM_JOBS, scheduler.getAllJobs().size());
   }

   private void scheduleRepeating(Connection connection) throws Exception {
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue("test.queue");
      MessageProducer producer = session.createProducer(queue);

      TextMessage message = session.createTextMessage("test msg");
      long time = 360 * 1000;
      message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, time);
      message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_PERIOD, 500);
      message.setIntProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT, -1);
      producer.send(message);
      producer.close();
   }

   private void scheduleOneShot(Connection connection) throws Exception {
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue("test.queue");
      MessageProducer producer = session.createProducer(queue);

      TextMessage message = session.createTextMessage("test msg");
      long time = TimeUnit.SECONDS.toMillis(30);
      message.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY, time);
      message.setIntProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT, 0);
      producer.send(message);
      producer.close();
   }

   protected JobSchedulerStoreImpl createScheduler() {
      JobSchedulerStoreImpl scheduler = new JobSchedulerStoreImpl();
      scheduler.setDirectory(schedulerStoreDir);
      scheduler.setJournalMaxFileLength(10 * 1024);
      return scheduler;
   }

   protected BrokerService createBroker(JobSchedulerStoreImpl scheduler) throws Exception {
      BrokerService answer = new BrokerService();
      answer.setJobSchedulerStore(scheduler);
      answer.setPersistent(true);
      answer.setDataDirectory(storeDir.getAbsolutePath());
      answer.setSchedulerSupport(true);
      answer.setUseJmx(false);
      return answer;
   }
}
