/*
    * 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.hadoop.hbase.master;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.MiniHBaseCluster;
  import org.apache.hadoop.hbase.Stoppable;
  import org.apache.hadoop.hbase.testclassification.MasterTests;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  /**
   * Test for Regions Recovery Config Manager
   */
  @Category({MasterTests.class, MediumTests.class})
  public class TestRegionsRecoveryConfigManager {
  
    private static final HBaseTestingUtility HBASE_TESTING_UTILITY = new HBaseTestingUtility();
  
    private MiniHBaseCluster cluster;
  
    private HMaster hMaster;
  
    private RegionsRecoveryChore regionsRecoveryChore;
  
    private RegionsRecoveryConfigManager regionsRecoveryConfigManager;
  
    private Configuration conf;
  
    @Before
    public void setup() throws Exception {
      conf = HBASE_TESTING_UTILITY.getConfiguration();
      conf.unset("hbase.regions.recovery.store.file.ref.count");
      conf.unset("hbase.master.regions.recovery.check.interval");
      HBASE_TESTING_UTILITY.startMiniCluster(1, 1);
      cluster = HBASE_TESTING_UTILITY.getMiniHBaseCluster();
    }
  
    @After
    public void tearDown() throws Exception {
      HBASE_TESTING_UTILITY.shutdownMiniCluster();
    }
  
    @Test
    public void testChoreSchedule() throws Exception {
  
      this.hMaster = cluster.getMaster();
  
      Stoppable stoppable = new StoppableImplementation();
      this.regionsRecoveryChore = new RegionsRecoveryChore(stoppable, conf, hMaster);
  
      this.regionsRecoveryConfigManager = new RegionsRecoveryConfigManager(this.hMaster);
      // not yet scheduled
      Assert.assertFalse(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
  
      this.regionsRecoveryConfigManager.onConfigurationChange(conf);
      // not yet scheduled
      Assert.assertFalse(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
  
      conf.setInt("hbase.master.regions.recovery.check.interval", 10);
      this.regionsRecoveryConfigManager.onConfigurationChange(conf);
      // not yet scheduled - missing config: hbase.regions.recovery.store.file.ref.count
      Assert.assertFalse(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
  
      conf.setInt("hbase.regions.recovery.store.file.ref.count", 10);
      this.regionsRecoveryConfigManager.onConfigurationChange(conf);
      // chore scheduled
      Assert.assertTrue(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
  
      conf.setInt("hbase.regions.recovery.store.file.ref.count", 20);
      this.regionsRecoveryConfigManager.onConfigurationChange(conf);
      // chore re-scheduled
      Assert.assertTrue(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
  
      conf.setInt("hbase.regions.recovery.store.file.ref.count", 20);
      this.regionsRecoveryConfigManager.onConfigurationChange(conf);
      // chore scheduling untouched
      Assert.assertTrue(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
 
     conf.unset("hbase.regions.recovery.store.file.ref.count");
     this.regionsRecoveryConfigManager.onConfigurationChange(conf);
     // chore un-scheduled
     Assert.assertFalse(hMaster.getChoreService().isChoreScheduled(regionsRecoveryChore));
   }
 
   /**
    * Simple helper class that just keeps track of whether or not its stopped.
    */
   private static class StoppableImplementation implements Stoppable {
 
     private boolean stop = false;
 
     @Override
     public void stop(String why) {
       this.stop = true;
     }
 
     @Override
     public boolean isStopped() {
       return this.stop;
     }
 
   }
 }