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 * Gets the unique server name for this server. 48 * If a RegionServer, it returns a concatenation of hostname, port and 49 * startcode formatted as <code><hostname> ',' <port> ',' <startcode></code>. 50 * If the master, it returns <code><hostname> ':' <port>'. 51 * @return unique server name 52 */ 53 public String getServerName(); 54 }