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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;
21  
22  import org.apache.hadoop.conf.Configuration;
23  import org.apache.hadoop.hbase.catalog.CatalogTracker;
24  import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
25  
26  /**
27   * Defines the set of shared functions implemented by HBase servers (Masters
28   * and RegionServers).
29   */
30  public interface Server extends Abortable, Stoppable {
31    /**
32     * Gets the configuration object for this server.
33     */
34    public Configuration getConfiguration();
35  
36    /**
37     * Gets the ZooKeeper instance for this server.
38     */
39    public ZooKeeperWatcher getZooKeeper();
40  
41    /**
42     * @return Master's instance of {@link CatalogTracker}
43     */
44    public CatalogTracker getCatalogTracker();
45  
46    /**
47     * @return The unique server name for this server.
48     */
49    public ServerName getServerName();
50  }