/**
 * 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.store.kahadb;

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

import java.io.File;
import java.io.FilenameFilter;

import javax.jms.Connection;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 */
public class KahaDBIndexLocationTest {

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

   @Rule
   public TestName name = new TestName();

   private BrokerService broker;

   private final File testDataDir = new File("target/activemq-data/QueuePurgeTest");
   private final File kahaDataDir = new File(testDataDir, "kahadb");
   private final File kahaIndexDir = new File(testDataDir, "kahadb/index");

   /**
    * @throws java.lang.Exception
    */
   @Before
   public void setUp() throws Exception {
      startBroker();
   }

   @After
   public void tearDown() throws Exception {
      stopBroker();
   }

   private void startBroker() throws Exception {
      createBroker();
      broker.start();
      broker.waitUntilStarted();
   }

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

   private void restartBroker() throws Exception {
      stopBroker();
      createBroker();
      broker.start();
      broker.waitUntilStarted();
   }

   private void createBroker() throws Exception {
      broker = new BrokerService();

      KahaDBPersistenceAdapter persistenceAdapter = new KahaDBPersistenceAdapter();
      persistenceAdapter.setDirectory(kahaDataDir);
      persistenceAdapter.setIndexDirectory(kahaIndexDir);

      broker.setDataDirectoryFile(testDataDir);
      broker.setUseJmx(false);
      broker.setAdvisorySupport(false);
      broker.setSchedulerSupport(false);
      broker.setDeleteAllMessagesOnStartup(true);
      broker.setPersistenceAdapter(persistenceAdapter);
   }

   @Test
   public void testIndexDirExists() throws Exception {
      LOG.info("Index dir is configured as: {}", kahaIndexDir);
      assertTrue(kahaDataDir.exists());
      assertTrue(kahaIndexDir.exists());

      String[] index = kahaIndexDir.list(new FilenameFilter() {

         @Override
         public boolean accept(File dir, String name) {
            LOG.info("Testing filename: {}", name);
            return name.endsWith("data") || name.endsWith("redo");
         }
      });

      String[] journal = kahaDataDir.list(new FilenameFilter() {

         @Override
         public boolean accept(File dir, String name) {
            LOG.info("Testing filename: {}", name);
            return name.endsWith("log") || name.equals("lock");
         }
      });

      produceMessages();

      // Should be db.data and db.redo and nothing else.
      assertNotNull(index);
      assertEquals(2, index.length);

      // Should contain the initial log for the journal and the lock.
      assertNotNull(journal);
      assertEquals(2, journal.length);
   }

   @Test
   public void testRestartWithDeleteWorksWhenIndexIsSeparate() throws Exception {
      produceMessages();
      restartBroker();

      ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost?create=false");
      Connection connection = cf.createConnection();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue(name.getMethodName());
      MessageConsumer consumer = session.createConsumer(queue);
      assertNull(consumer.receive(2000));
   }

   private void produceMessages() throws Exception {
      ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory("vm://localhost?create=false");
      Connection connection = cf.createConnection();
      Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      Queue queue = session.createQueue(name.getMethodName());
      MessageProducer producer = session.createProducer(queue);
      for (int i = 0; i < 5; ++i) {
         producer.send(session.createTextMessage("test:" + i));
      }
      connection.close();
   }
}
