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1   /**
2    * Copyright 2010 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.io.IOException;
23  
24  import org.apache.hadoop.hbase.TableNotDisabledException;
25  import org.apache.hadoop.hbase.TableNotFoundException;
26  import org.apache.hadoop.hbase.executor.ExecutorService;
27  
28  /**
29   * Services Master supplies
30   */
31  public interface MasterServices {
32    /**
33     * @return Master's instance of the {@link AssignmentManager}
34     */
35    public AssignmentManager getAssignmentManager();
36  
37    /**
38     * @return Master's filesystem {@link MasterFileSystem} utility class.
39     */
40    public MasterFileSystem getMasterFileSystem();
41  
42    /**
43     * @return Master's {@link ServerManager} instance.
44     */
45    public ServerManager getServerManager();
46  
47    /**
48     * @return Master's instance of {@link ExecutorService}
49     */
50    public ExecutorService getExecutorService();
51  
52    /**
53     * Check table is modifiable; i.e. exists and is offline.
54     * @param tableName Name of table to check.
55     * @throws TableNotDisabledException
56     * @throws TableNotFoundException 
57     */
58    public void checkTableModifiable(final byte [] tableName) throws IOException;
59  }