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.snapshot;
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.hadoop.hbase.zookeeper.ZKWatcher;
025import org.apache.yetus.audience.InterfaceAudience;
026import org.apache.zookeeper.KeeperException;
027
028import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
029import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotCleanupProtos;
030
031/**
032 * Store the snapshot cleanup enabled state.
033 */
034@InterfaceAudience.Private
035public class SnapshotCleanupStateStore extends BooleanStateStore {
036
037  public static final String STATE_NAME = "snapshot_cleanup_enabled";
038
039  @SuppressWarnings("deprecation")
040  public SnapshotCleanupStateStore(MasterRegion masterRegion, ZKWatcher watcher)
041    throws IOException, KeeperException, DeserializationException {
042    super(masterRegion, STATE_NAME, watcher, watcher.getZNodePaths().snapshotCleanupZNode);
043  }
044
045  @Override
046  protected byte[] toByteArray(boolean isSnapshotCleanupEnabled) {
047    SnapshotCleanupProtos.SnapshotCleanupState.Builder builder =
048      SnapshotCleanupProtos.SnapshotCleanupState.newBuilder();
049    builder.setSnapshotCleanupEnabled(isSnapshotCleanupEnabled);
050    return ProtobufUtil.prependPBMagic(builder.build().toByteArray());
051  }
052
053  @Override
054  protected boolean parseFrom(byte[] pbBytes) throws DeserializationException {
055    ProtobufUtil.expectPBMagicPrefix(pbBytes);
056    SnapshotCleanupProtos.SnapshotCleanupState.Builder builder =
057      SnapshotCleanupProtos.SnapshotCleanupState.newBuilder();
058    try {
059      int magicLen = ProtobufUtil.lengthOfPBMagic();
060      ProtobufUtil.mergeFrom(builder, pbBytes, magicLen, pbBytes.length - magicLen);
061    } catch (IOException e) {
062      throw new DeserializationException(e);
063    }
064    return builder.build().getSnapshotCleanupEnabled();
065  }
066}