/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.master;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ServerName;
/**
* Stores the plan for the move of an individual region.
*
* Contains info for the region being moved, info for the server the region
* should be moved from, and info for the server the region should be moved
* to.
*
* The comparable implementation of this class compares only the region
* information and not the source/dest server info.
*/
public class RegionPlan implements Comparable<RegionPlan> {
private final HRegionInfo hri;
private final ServerName source;
private ServerName dest;
/**
* Instantiate a plan for a region move, moving the specified region from
* the specified source server to the specified destination server.
*
* Destination server can be instantiated as null and later set
* with {@link #setDestination(ServerName)}.
*
* @param hri region to be moved
* @param source regionserver region should be moved from
* @param dest regionserver region should be moved to
*/
public RegionPlan(final HRegionInfo hri, ServerName source, ServerName dest) {
this.hri = hri;
this.source = source;
this.dest = dest;
}
/**
* Set the destination server for the plan for this region.
*/
public void setDestination(ServerName dest) {
this.dest = dest;
}
/**
* Get the source server for the plan for this region.
* @return server info for source
*/
public ServerName getSource() {
return source;
}
/**
* Get the destination server for the plan for this region.
* @return server info for destination
*/
public ServerName getDestination() {
return dest;
}
/**
* Get the encoded region name for the region this plan is for.
* @return Encoded region name
*/
public String getRegionName() {
return this.hri.getEncodedName();
}
public HRegionInfo getRegionInfo() {
return this.hri;
}
/**
* Compare the region info.
* @param o region plan you are comparing against
*/
@Override
public int compareTo(RegionPlan o) {
return getRegionName().compareTo(o.getRegionName());
}
@Override
public String toString() {
return "hri=" + this.hri.getRegionNameAsString() + ", src=" +
(this.source == null? "": this.source.toString()) +
", dest=" + (this.dest == null? "": this.dest.toString());
}
}