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.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 }