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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  
19  package org.apache.hadoop.hbase.master.balancer;
20  
21  import org.apache.hadoop.hbase.classification.InterfaceAudience;
22  import org.apache.hadoop.hbase.Chore;
23  import org.apache.hadoop.hbase.master.HMaster;
24  import org.apache.hadoop.hbase.master.LoadBalancer;
25  
26  /**
27   * Chore that will feed the balancer the cluster status.
28   */
29  @InterfaceAudience.Private
30  public class ClusterStatusChore extends Chore {
31  
32    private final HMaster master;
33    private final LoadBalancer balancer;
34  
35    public ClusterStatusChore(HMaster master, LoadBalancer balancer) {
36      super(master.getServerName() + "-ClusterStatusChore",
37            master.getConfiguration().getInt("hbase.balancer.statusPeriod", 60000),
38            master);
39      this.master = master;
40      this.balancer = balancer;
41    }
42  
43    @Override
44    protected void chore() {
45       balancer.setClusterStatus(master.getClusterStatus());
46    }
47  }