1 /** 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.hadoop.hbase.regionserver; 19 20 import java.io.IOException; 21 22 import org.apache.hadoop.hbase.classification.InterfaceAudience; 23 import org.apache.hadoop.hbase.HRegionInfo; 24 import org.apache.hadoop.hbase.Server; 25 import org.apache.hadoop.hbase.regionserver.wal.HLog; 26 27 @InterfaceAudience.Private 28 class MetaLogRoller extends LogRoller { 29 public MetaLogRoller(Server server, RegionServerServices services) { 30 super(server, services); 31 } 32 @Override 33 protected HLog getWAL() throws IOException { 34 //The argument to getWAL below could either be HRegionInfo.FIRST_META_REGIONINFO or 35 //HRegionInfo.ROOT_REGIONINFO. Both these share the same WAL. 36 return services.getWAL(HRegionInfo.FIRST_META_REGIONINFO); 37 } 38 }