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;
019
020import java.io.IOException;
021import java.util.concurrent.CountDownLatch;
022import org.apache.hadoop.hbase.client.RegionInfo;
023import org.apache.hadoop.hbase.master.procedure.AbstractStateMachineRegionProcedure;
024import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
025import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;
026import org.apache.hadoop.hbase.procedure2.ProcedureYieldException;
027
028public class DummyRegionProcedure
029  extends AbstractStateMachineRegionProcedure<DummyRegionProcedureState> {
030
031  private final CountDownLatch arrive = new CountDownLatch(1);
032
033  private final CountDownLatch resume = new CountDownLatch(1);
034
035  public DummyRegionProcedure() {
036  }
037
038  public DummyRegionProcedure(MasterProcedureEnv env, RegionInfo hri) {
039    super(env, hri);
040  }
041
042  @Override
043  public TableOperationType getTableOperationType() {
044    return TableOperationType.REGION_EDIT;
045  }
046
047  @Override
048  protected Flow executeFromState(MasterProcedureEnv env, DummyRegionProcedureState state)
049    throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException {
050    arrive.countDown();
051    resume.await();
052    return Flow.NO_MORE_STATE;
053  }
054
055  @Override
056  protected void rollbackState(MasterProcedureEnv env, DummyRegionProcedureState state)
057    throws IOException, InterruptedException {
058  }
059
060  @Override
061  protected DummyRegionProcedureState getState(int stateId) {
062    return DummyRegionProcedureState.STATE;
063  }
064
065  @Override
066  protected int getStateId(DummyRegionProcedureState state) {
067    return 0;
068  }
069
070  @Override
071  protected DummyRegionProcedureState getInitialState() {
072    return DummyRegionProcedureState.STATE;
073  }
074
075  public void waitUntilArrive() throws InterruptedException {
076    arrive.await();
077  }
078
079  public void resume() {
080    resume.countDown();
081  }
082}