/**
    * 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.util.compaction;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.HColumnDescriptor;
  import org.apache.hadoop.hbase.HTableDescriptor;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.client.Connection;
  import org.apache.hadoop.hbase.client.Table;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.testclassification.MiscTests;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.TestName;
  
  @Category({ MiscTests.class, MediumTests.class })
  public class TestMajorCompactorTTL extends MajorCompactorTest {
  
    @Rule
    public TestName name = new TestName();
  
    @Before
    public void setUp() throws Exception {
      utility = new HBaseTestingUtility();
      utility.getConfiguration().setInt("hbase.hfile.compaction.discharger.interval", 10);
      utility.startMiniCluster();
      admin = utility.getHBaseAdmin();
    }
  
    @After
    public void tearDown() throws Exception {
      utility.shutdownMiniCluster();
    }
  
    @Test
    public void testCompactingATable() throws Exception {
      TableName tableName = createTable(name.getMethodName());
  
      // Delay a bit, so we can set the table TTL to 5 seconds
      Thread.sleep(10 * 1000);
  
      int numberOfRegions = utility.getHBaseAdmin().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);
  
      MajorCompactorTTL compactor = new MajorCompactorTTL(utility.getConfiguration(),
          admin.getTableDescriptor(tableName), 1, 200);
      compactor.initializeWorkQueues();
      compactor.compactAllRegions();
      compactor.shutdown();
  
      // verify that the store has been completely major compacted.
      numberOfRegions = utility.getHBaseAdmin().getTableRegions(tableName).size();
      numHFiles = utility.getNumHFiles(tableName, FAMILY);
      assertEquals(numberOfRegions, numHFiles);
    }
  
    protected void modifyTTL(TableName tableName) throws IOException, InterruptedException {
      // Set the TTL to 5 secs, so all the files just written above will get cleaned up on compact.
      admin.disableTable(tableName);
      utility.waitTableDisabled(tableName.getName());
      HTableDescriptor descriptor = admin.getTableDescriptor(tableName);
      HColumnDescriptor colDesc = descriptor.getFamily(FAMILY);
      colDesc.setTimeToLive(5);
      admin.modifyColumn(tableName, colDesc);
      admin.enableTable(tableName);
      utility.waitTableEnabled(tableName);
    }
  
    protected TableName createTable(String name) throws IOException, InterruptedException {
      TableName tableName = TableName.valueOf(name);
      utility.createMultiRegionTable(tableName, FAMILY, 5);
      utility.waitTableAvailable(tableName);
     Connection connection = utility.getConnection();
     Table table = connection.getTable(tableName);
     // write data and flush multiple store files:
     for (int i = 0; i < 5; i++) {
       loadRandomRows(table, FAMILY, 50, 100);
       utility.flush(tableName);
     }
     table.close();
     return tableName;
   }
 }