001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.regionserver; 019 020import java.util.List; 021import java.util.Map; 022import org.apache.hadoop.hbase.wal.AbstractWALRoller; 023import org.apache.hadoop.hbase.wal.WAL; 024import org.apache.yetus.audience.InterfaceAudience; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028/** 029 * Runs periodically to determine if the WAL should be rolled. NOTE: This class extends Thread 030 * rather than Chore because the sleep time can be interrupted when there is something to do, rather 031 * than the Chore sleep time which is invariant. TODO: change to a pool of threads 032 */ 033@InterfaceAudience.Private 034public class LogRoller extends AbstractWALRoller<RegionServerServices> { 035 private static final Logger LOG = LoggerFactory.getLogger(LogRoller.class); 036 037 public LogRoller(RegionServerServices services) { 038 super("LogRoller", services.getConfiguration(), services); 039 } 040 041 protected void scheduleFlush(String encodedRegionName, List<byte[]> families) { 042 RegionServerServices services = this.abortable; 043 HRegion r = (HRegion) services.getRegion(encodedRegionName); 044 if (r == null) { 045 LOG.warn("Failed to schedule flush of {}, because it is not online on us", encodedRegionName); 046 return; 047 } 048 FlushRequester requester = services.getFlushRequester(); 049 if (requester == null) { 050 LOG.warn("Failed to schedule flush of {}, region={}, because FlushRequester is null", 051 encodedRegionName, r); 052 return; 053 } 054 // flush specified stores to clean old logs 055 requester.requestFlush(r, families, FlushLifeCycleTracker.DUMMY); 056 } 057 058 Map<WAL, RollController> getWalNeedsRoll() { 059 return this.wals; 060 } 061}