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1   /**
2    * Copyright 2011 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  package org.apache.hadoop.hbase.master;
21  
22  import java.util.concurrent.Callable;
23  
24  import org.apache.hadoop.hbase.HRegionInfo;
25  
26  /**
27   * A callable object that invokes the corresponding action that needs to be
28   * taken for assignment of a region in transition. 
29   * Implementing as future callable we are able to act on the timeout
30   * asynchronously.
31   */
32  public class AssignCallable implements Callable<Object> {
33    private AssignmentManager assignmentManager;
34  
35    private HRegionInfo hri;
36  
37    public AssignCallable(AssignmentManager assignmentManager, HRegionInfo hri) {
38      this.assignmentManager = assignmentManager;
39      this.hri = hri;
40    }
41  
42    @Override
43    public Object call() throws Exception {
44      assignmentManager.assign(hri, true, true, true);
45      return null;
46    }
47  }