/**
    * 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 java.lang.reflect.Field;
  
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.ScheduledChore;
  import org.apache.hadoop.hbase.master.balancer.BalancerChore;
  import org.apache.hadoop.hbase.master.balancer.ClusterStatusChore;
  import org.apache.hadoop.hbase.master.cleaner.HFileCleaner;
  import org.apache.hadoop.hbase.master.cleaner.LogCleaner;
  import org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore;
  import org.apache.hadoop.hbase.testclassification.MasterTests;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  /**
   * Tests to validate if HMaster default chores are scheduled
   */
  @Category({MasterTests.class, MediumTests.class})
  public class TestMasterChoreScheduled {
  
    private static HMaster hMaster;
  
    private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
  
    @BeforeClass
    public static void setUp() throws Exception {
      UTIL.startMiniCluster(1, 1);
      hMaster = UTIL.getMiniHBaseCluster().getMaster();
    }
  
    @AfterClass
    public static void tearDown() throws Exception {
      UTIL.shutdownMiniCluster();
    }
  
    @Test
    public void testDefaultScheduledChores() throws Exception {
      // test if logCleaner chore is scheduled by default in HMaster init
      TestChoreField<LogCleaner> logCleanerTestChoreField = new TestChoreField<>();
      LogCleaner logCleaner = logCleanerTestChoreField.getChoreObj("logCleaner");
      logCleanerTestChoreField.testIfChoreScheduled(logCleaner);
  
      // test if hfileCleaner chore is scheduled by default in HMaster init
      TestChoreField<HFileCleaner> hFileCleanerTestChoreField = new TestChoreField<>();
      HFileCleaner hFileCleaner = hFileCleanerTestChoreField.getChoreObj("hfileCleaner");
      hFileCleanerTestChoreField.testIfChoreScheduled(hFileCleaner);
  
      // test if clusterStatusChore chore is scheduled by default in HMaster init
      TestChoreField<ClusterStatusChore> clusterStatusChoreTestChoreField = new TestChoreField<>();
      ClusterStatusChore clusterStatusChore = clusterStatusChoreTestChoreField
        .getChoreObj("clusterStatusChore");
      clusterStatusChoreTestChoreField.testIfChoreScheduled(clusterStatusChore);
  
      // test if balancerChore chore is scheduled by default in HMaster init
      TestChoreField<BalancerChore> balancerChoreTestChoreField = new TestChoreField<>();
      BalancerChore balancerChore = balancerChoreTestChoreField.getChoreObj("balancerChore");
      balancerChoreTestChoreField.testIfChoreScheduled(balancerChore);
  
      // test if normalizerChore chore is scheduled by default in HMaster init
      TestChoreField<RegionNormalizerChore> regionNormalizerChoreTestChoreField =
        new TestChoreField<>();
      RegionNormalizerChore regionNormalizerChore = regionNormalizerChoreTestChoreField
        .getChoreObj("normalizerChore");
      regionNormalizerChoreTestChoreField.testIfChoreScheduled(regionNormalizerChore);
  
      // test if catalogJanitorChore chore is scheduled by default in HMaster init
      TestChoreField<CatalogJanitor> catalogJanitorTestChoreField = new TestChoreField<>();
      CatalogJanitor catalogJanitor = catalogJanitorTestChoreField
        .getChoreObj("catalogJanitorChore");
      catalogJanitorTestChoreField.testIfChoreScheduled(catalogJanitor);
  
    }
  
  
    private static class TestChoreField<E extends ScheduledChore> {
  
     private E getChoreObj(String fieldName) throws NoSuchFieldException,
         IllegalAccessException {
       Field masterField = HMaster.class.getDeclaredField(fieldName);
       masterField.setAccessible(true);
       E choreFieldVal = (E) masterField.get(hMaster);
       return choreFieldVal;
     }
 
     private void testIfChoreScheduled(E choreObj) {
       Assert.assertNotNull(choreObj);
       Assert.assertTrue(hMaster.getChoreService().isChoreScheduled(choreObj));
     }
 
   }
 
 }