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.assignment;
019
020import java.io.IOException;
021import java.util.Optional;
022import org.apache.hadoop.hbase.ServerName;
023import org.apache.hadoop.hbase.exceptions.UnexpectedStateException;
024import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
025import org.apache.hadoop.hbase.procedure2.ProcedureMetrics;
026import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;
027import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;
028import org.apache.hadoop.hbase.procedure2.RemoteProcedureDispatcher.RemoteOperation;
029import org.apache.yetus.audience.InterfaceAudience;
030
031import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
032import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.AssignRegionStateData;
033import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RegionTransitionState;
034import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;
035
036/**
037 * Leave here only for checking if we can successfully start the master.
038 * @deprecated Do not use any more.
039 * @see TransitRegionStateProcedure
040 */
041@Deprecated
042@InterfaceAudience.Private
043public class AssignProcedure extends RegionTransitionProcedure {
044
045  private boolean forceNewPlan = false;
046
047  protected volatile ServerName targetServer;
048
049  public AssignProcedure() {
050  }
051
052  @Override
053  public TableOperationType getTableOperationType() {
054    return TableOperationType.REGION_ASSIGN;
055  }
056
057  @Override
058  protected boolean isRollbackSupported(final RegionTransitionState state) {
059    switch (state) {
060      case REGION_TRANSITION_QUEUE:
061        return true;
062      default:
063        return false;
064    }
065  }
066
067  @Override
068  protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {
069    final AssignRegionStateData.Builder state =
070      AssignRegionStateData.newBuilder().setTransitionState(getTransitionState())
071        .setRegionInfo(ProtobufUtil.toRegionInfo(getRegionInfo()));
072    if (forceNewPlan) {
073      state.setForceNewPlan(true);
074    }
075    if (this.targetServer != null) {
076      state.setTargetServer(ProtobufUtil.toServerName(this.targetServer));
077    }
078    if (getAttempt() > 0) {
079      state.setAttempt(getAttempt());
080    }
081    serializer.serialize(state.build());
082  }
083
084  @Override
085  protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {
086    final AssignRegionStateData state = serializer.deserialize(AssignRegionStateData.class);
087    setTransitionState(state.getTransitionState());
088    setRegionInfo(ProtobufUtil.toRegionInfo(state.getRegionInfo()));
089    forceNewPlan = state.getForceNewPlan();
090    if (state.hasTargetServer()) {
091      this.targetServer = ProtobufUtil.toServerName(state.getTargetServer());
092    }
093    if (state.hasAttempt()) {
094      setAttempt(state.getAttempt());
095    }
096  }
097
098  @Override
099  protected boolean startTransition(final MasterProcedureEnv env, final RegionStateNode regionNode)
100    throws IOException {
101    return true;
102  }
103
104  @Override
105  protected boolean updateTransition(final MasterProcedureEnv env, final RegionStateNode regionNode)
106    throws IOException, ProcedureSuspendedException {
107    return true;
108  }
109
110  @Override
111  protected void finishTransition(final MasterProcedureEnv env, final RegionStateNode regionNode)
112    throws IOException {
113  }
114
115  @Override
116  protected void reportTransition(final MasterProcedureEnv env, final RegionStateNode regionNode,
117    final TransitionCode code, final long openSeqNum) throws UnexpectedStateException {
118  }
119
120  @Override
121  public Optional<RemoteOperation> remoteCallBuild(final MasterProcedureEnv env,
122    final ServerName serverName) {
123    return Optional.empty();
124  }
125
126  @Override
127  protected boolean remoteCallFailed(final MasterProcedureEnv env, final RegionStateNode regionNode,
128    final IOException exception) {
129    return true;
130  }
131
132  @Override
133  public void toStringClassDetails(StringBuilder sb) {
134    super.toStringClassDetails(sb);
135    if (this.targetServer != null) sb.append(", target=").append(this.targetServer);
136  }
137
138  @Override
139  protected ProcedureMetrics getProcedureMetrics(MasterProcedureEnv env) {
140    return env.getAssignmentManager().getAssignmentManagerMetrics().getAssignProcMetrics();
141  }
142
143  @Override
144  public void setProcId(long procId) {
145    super.setProcId(procId);
146  }
147}