/*
 * 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.geode.internal.cache.ha;

import org.apache.geode.cache.Cache;
import org.apache.geode.cache.CacheException;
import org.apache.geode.cache.CacheFactory;
import org.apache.geode.distributed.DistributedSystem;
import org.apache.geode.internal.Assert;
import org.apache.geode.internal.cache.GemFireCacheImpl;
import org.apache.geode.internal.cache.RegionQueue;
import org.apache.geode.test.junit.categories.ClientSubscriptionTest;
import org.apache.geode.test.junit.categories.IntegrationTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.io.IOException;
import java.util.Properties;

import static org.apache.geode.distributed.ConfigurationProperties.LOCATORS;
import static org.apache.geode.distributed.ConfigurationProperties.MCAST_PORT;
import static org.junit.Assert.fail;

/**
 *
 */
@Category({IntegrationTest.class, ClientSubscriptionTest.class})
public class HARegionQueueStartStopJUnitTest {

  /**
   * Creates the cache instance for the test
   * 
   * @return the cache instance
   * @throws CacheException - thrown if any exception occurs in cache creation
   */
  private Cache createCache() throws CacheException {
    final Properties props = new Properties();
    props.setProperty(LOCATORS, "");
    props.setProperty(MCAST_PORT, "0");
    return CacheFactory.create(DistributedSystem.connect(props));
  }

  /**
   * Creates HA region-queue object
   * 
   * @return HA region-queue object
   * @throws IOException
   * @throws ClassNotFoundException
   * @throws CacheException
   * @throws InterruptedException
   */
  private RegionQueue createHARegionQueue(String name, Cache cache)
      throws IOException, ClassNotFoundException, CacheException, InterruptedException {
    RegionQueue regionqueue = HARegionQueue.getHARegionQueueInstance(name, cache,
        HARegionQueue.NON_BLOCKING_HA_QUEUE, false);
    return regionqueue;
  }

  @Test
  public void testStartStop() {
    try {
      boolean exceptionOccured = false;
      Cache cache = createCache();
      createHARegionQueue("test", cache);
      Assert.assertTrue(HARegionQueue.getDispatchedMessagesMapForTesting() != null);
      HARegionQueue.stopHAServices();
      try {
        HARegionQueue.getDispatchedMessagesMapForTesting();
      } catch (NullPointerException e) {
        exceptionOccured = true;
      }
      if (!exceptionOccured) {
        fail("Expected exception to occur but did not occur");
      }
      HARegionQueue.startHAServices((GemFireCacheImpl) cache);
      Assert.assertTrue(HARegionQueue.getDispatchedMessagesMapForTesting() != null);
      cache.close();
      try {
        HARegionQueue.getDispatchedMessagesMapForTesting();
      } catch (NullPointerException e) {
        exceptionOccured = true;
      }
      if (!exceptionOccured) {
        fail("Expected exception to occur but did not occur");
      }

      cache = createCache();

      try {
        HARegionQueue.getDispatchedMessagesMapForTesting();
      } catch (NullPointerException e) {
        exceptionOccured = true;
      }
      if (!exceptionOccured) {
        fail("Expected exception to occur but did not occur");
      }

    } catch (Exception e) {
      e.printStackTrace();
      fail("Test failed due to " + e);
    }

  }


}