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.balancer;
019
020import org.apache.yetus.audience.InterfaceAudience;
021
022@InterfaceAudience.Private
023public class SwapRegionsAction extends BalanceAction {
024  private final int fromServer;
025  private final int fromRegion;
026  private final int toServer;
027  private final int toRegion;
028
029  SwapRegionsAction(int fromServer, int fromRegion, int toServer, int toRegion) {
030    super(Type.SWAP_REGIONS);
031    this.fromServer = fromServer;
032    this.fromRegion = fromRegion;
033    this.toServer = toServer;
034    this.toRegion = toRegion;
035  }
036
037  public int getFromServer() {
038    return fromServer;
039  }
040
041  public int getFromRegion() {
042    return fromRegion;
043  }
044
045  public int getToServer() {
046    return toServer;
047  }
048
049  public int getToRegion() {
050    return toRegion;
051  }
052
053  @Override
054  public BalanceAction undoAction() {
055    return new SwapRegionsAction(fromServer, toRegion, toServer, fromRegion);
056  }
057
058  @Override
059  public String toString() {
060    return getType() + ": " + fromRegion + ":" + fromServer + " <-> " + toRegion + ":" + toServer;
061  }
062}