| /** |
| * 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 java.io.Serializable; |
| import java.util.Comparator; |
| |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceStability; |
| 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. |
| */ |
| @InterfaceAudience.LimitedPrivate("Coprocessors") |
| @InterfaceStability.Evolving |
| public class RegionPlan implements Comparable<RegionPlan> { |
| private final HRegionInfo hri; |
| private final ServerName source; |
| private ServerName dest; |
| |
| public static class RegionPlanComparator implements Comparator<RegionPlan>, Serializable { |
| |
| private static final long serialVersionUID = 4213207330485734853L; |
| |
| @Override |
| public int compare(RegionPlan l, RegionPlan r) { |
| long diff = r.getRegionInfo().getRegionId() - l.getRegionInfo().getRegionId(); |
| if (diff < 0) return -1; |
| if (diff > 0) return 1; |
| return 0; |
| } |
| } |
| |
| /** |
| * 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 int hashCode() { |
| return getRegionName().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| RegionPlan other = (RegionPlan) obj; |
| return compareTo(other) == 0; |
| } |
| |
| @Override |
| public String toString() { |
| return "hri=" + this.hri.getRegionNameAsString() + ", src=" + |
| (this.source == null? "": this.source.toString()) + |
| ", dest=" + (this.dest == null? "": this.dest.toString()); |
| } |
| } |