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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.master.balancer;
19  
20  import java.io.Serializable;
21  
22  import org.apache.hadoop.classification.InterfaceAudience;
23  import org.apache.hadoop.hbase.ServerName;
24  
25  /**
26   * Data structure that holds servername and 'load'.
27   */
28  @InterfaceAudience.Private
29  class ServerAndLoad implements Comparable<ServerAndLoad>, Serializable {
30    private static final long serialVersionUID = 2735470854607296965L;
31    private final ServerName sn;
32    private final int load;
33  
34    ServerAndLoad(final ServerName sn, final int load) {
35      this.sn = sn;
36      this.load = load;
37    }
38  
39    ServerName getServerName() {
40      return this.sn;
41    }
42  
43    int getLoad() {
44      return this.load;
45    }
46  
47    @Override
48    public int compareTo(ServerAndLoad other) {
49      int diff = this.load - other.load;
50      return diff != 0 ? diff : this.sn.compareTo(other.getServerName());
51    }
52  
53    @Override
54    public int hashCode() {
55      int result = load;
56      result = 31 * result + ((sn == null) ? 0 : sn.hashCode());
57      return result;
58    }
59  
60    @Override
61    public boolean equals(Object o) {
62      if (o instanceof ServerAndLoad) {
63        ServerAndLoad sl = (ServerAndLoad) o;
64        return this.compareTo(sl) == 0;
65      }
66      return false;
67    }
68  }