/**
    * 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
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  package org.apache.hadoop.hbase.rsgroup;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import com.google.common.collect.Lists;
  import java.util.List;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.MiniHBaseCluster;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.Waiter;
  import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
  import org.apache.hadoop.hbase.master.HMaster;
  import org.apache.hadoop.hbase.master.ServerManager;
  import org.apache.hadoop.hbase.util.compaction.TestMajorCompactorTTL;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  public class TestRSGroupMajorCompactionTTL extends TestMajorCompactorTTL {
  
    private final static int NUM_SLAVES_BASE = 6;
  
    @Before
    public void setUp() throws Exception {
      utility = new HBaseTestingUtility();
      Configuration conf = utility.getConfiguration();
      conf.set(HConstants.HBASE_MASTER_LOADBALANCER_CLASS, RSGroupBasedLoadBalancer.class.getName());
      conf.set(CoprocessorHost.MASTER_COPROCESSOR_CONF_KEY, RSGroupAdminEndpoint.class.getName());
      conf.setInt(ServerManager.WAIT_ON_REGIONSERVERS_MINTOSTART, NUM_SLAVES_BASE);
      conf.setInt("hbase.hfile.compaction.discharger.interval", 10);
      utility.startMiniCluster(NUM_SLAVES_BASE);
      MiniHBaseCluster cluster = utility.getHBaseCluster();
      final HMaster master = cluster.getMaster();
  
      //wait for balancer to come online
      utility.waitFor(60000, new Waiter.Predicate<Exception>() {
        @Override
        public boolean evaluate() {
          return master.isInitialized() &&
              ((RSGroupBasedLoadBalancer) master.getLoadBalancer()).isOnline();
        }
      });
      admin = utility.getHBaseAdmin();
    }
  
    @After
    public void tearDown() throws Exception {
      utility.shutdownMiniCluster();
    }
  
    @Test
    public void testCompactingTables() throws Exception {
      List<TableName> tableNames = Lists.newArrayList();
      for (int i = 0; i < 10; i++) {
        tableNames.add(createTable(name.getMethodName() + "___" + i));
      }
  
      // Delay a bit, so we can set the table TTL to 5 seconds
      Thread.sleep(10 * 1000);
  
      for (TableName tableName : tableNames) {
        int numberOfRegions = admin.getTableRegions(tableName).size();
        int numHFiles = utility.getNumHFiles(tableName, FAMILY);
        // we should have a table with more store files than we would before we major compacted.
        assertTrue(numberOfRegions < numHFiles);
        modifyTTL(tableName);
      }
  
      RSGroupMajorCompactionTTL compactor = new RSGroupMajorCompactionTTL();
      compactor.compactTTLRegionsOnGroup(utility.getConfiguration(),
          RSGroupInfo.DEFAULT_GROUP, 1, 200, -1, -1, false, false);
  
      for (TableName tableName : tableNames) {
        int numberOfRegions = admin.getTableRegions(tableName).size();
        int numHFiles = utility.getNumHFiles(tableName, FAMILY);
        assertEquals(numberOfRegions, numHFiles);
      }
    }
  }