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.replication.regionserver;
019
020import org.apache.hadoop.hbase.executor.EventType;
021import org.apache.hadoop.hbase.procedure2.RSProcedureCallable;
022import org.apache.hadoop.hbase.regionserver.HRegionServer;
023import org.apache.log4j.Logger;
024import org.apache.yetus.audience.InterfaceAudience;
025
026import org.apache.hbase.thirdparty.com.google.protobuf.InvalidProtocolBufferException;
027
028import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.PeerModificationType;
029import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RefreshPeerParameter;
030
031/**
032 * The callable executed at RS side to refresh the peer config/state. <br/>
033 */
034@InterfaceAudience.Private
035public class RefreshPeerCallable implements RSProcedureCallable {
036
037  private static final Logger LOG = Logger.getLogger(RefreshPeerCallable.class);
038  private HRegionServer rs;
039
040  private String peerId;
041
042  private PeerModificationType type;
043
044  private Exception initError;
045
046  @Override
047  public Void call() throws Exception {
048    if (initError != null) {
049      throw initError;
050    }
051
052    LOG.info("Received a peer change event, peerId=" + peerId + ", type=" + type);
053    PeerProcedureHandler handler = rs.getReplicationSourceService().getPeerProcedureHandler();
054    switch (type) {
055      case ADD_PEER:
056        handler.addPeer(this.peerId);
057        break;
058      case REMOVE_PEER:
059        handler.removePeer(this.peerId);
060        break;
061      case ENABLE_PEER:
062        handler.enablePeer(this.peerId);
063        break;
064      case DISABLE_PEER:
065        handler.disablePeer(this.peerId);
066        break;
067      case UPDATE_PEER_CONFIG:
068        handler.updatePeerConfig(this.peerId);
069        break;
070      default:
071        throw new IllegalArgumentException("Unknown peer modification type: " + type);
072    }
073    return null;
074  }
075
076  @Override
077  public void init(byte[] parameter, HRegionServer rs) {
078    this.rs = rs;
079    try {
080      RefreshPeerParameter param = RefreshPeerParameter.parseFrom(parameter);
081      this.peerId = param.getPeerId();
082      this.type = param.getType();
083    } catch (InvalidProtocolBufferException e) {
084      initError = e;
085    }
086  }
087
088  @Override
089  public EventType getEventType() {
090    return EventType.RS_REFRESH_PEER;
091  }
092}