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.master.replication;
019
020import java.io.IOException;
021import org.apache.hadoop.hbase.exceptions.DeserializationException;
022import org.apache.hadoop.hbase.master.BooleanStateStore;
023import org.apache.hadoop.hbase.master.region.MasterRegion;
024import org.apache.yetus.audience.InterfaceAudience;
025import org.apache.zookeeper.KeeperException;
026
027import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
028import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;
029
030/**
031 * Store the peer modification state.
032 */
033@InterfaceAudience.Private
034public class ReplicationPeerModificationStateStore extends BooleanStateStore {
035
036  public static final String STATE_NAME = "replication_peer_modification_on";
037
038  public ReplicationPeerModificationStateStore(MasterRegion masterRegion)
039    throws DeserializationException, IOException, KeeperException {
040    super(masterRegion, STATE_NAME, null, null);
041  }
042
043  @Override
044  protected byte[] toByteArray(boolean on) {
045    ReplicationProtos.ReplicationPeerModificationState.Builder builder =
046      ReplicationProtos.ReplicationPeerModificationState.newBuilder();
047    builder.setOn(on);
048    return ProtobufUtil.prependPBMagic(builder.build().toByteArray());
049  }
050
051  @Override
052  protected boolean parseFrom(byte[] bytes) throws DeserializationException {
053    ProtobufUtil.expectPBMagicPrefix(bytes);
054    ReplicationProtos.ReplicationPeerModificationState.Builder builder =
055      ReplicationProtos.ReplicationPeerModificationState.newBuilder();
056    try {
057      int magicLen = ProtobufUtil.lengthOfPBMagic();
058      ProtobufUtil.mergeFrom(builder, bytes, magicLen, bytes.length - magicLen);
059    } catch (IOException e) {
060      throw new DeserializationException(e);
061    }
062    return builder.build().getOn();
063  }
064}