CleanOldTransactionsChore.java

/**
 * Copyright 2009 The Apache Software Foundation 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.regionserver.transactional;

import java.io.IOException;

import org.apache.hadoop.hbase.Chore;
import org.apache.hadoop.hbase.HRegionInfo;

/**
 * Cleans up committed transactions when they are no longer needed to verify
 * pending transactions.
 */
class CleanOldTransactionsChore extends Chore {

  private static final String SLEEP_CONF = "hbase.transaction.clean.sleep";
  private static final int DEFAULT_SLEEP = 60 * 1000;

  private final TransactionalRegionServer regionServer;

  /**
   * @param regionServer
   * @param stopRequest
   */
  public CleanOldTransactionsChore(final TransactionalRegionServer regionServer) {
    super("CleanOldTransactions", regionServer.getConfiguration().getInt(
        SLEEP_CONF, DEFAULT_SLEEP), regionServer);
    this.regionServer = regionServer;
  }

  @Override
  protected void chore() {
    try {
		for (HRegionInfo regionInfo : regionServer.getOnlineRegions()) {
		  TransactionalRegion region = (TransactionalRegion) regionServer
		      .getOnlineRegion(regionInfo.getRegionName());
		  region.removeUnNeededCommitedTransactions();
		}
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
  }
}