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.regionserver; 21 22 /** 23 * Implementations are stoppable. 24 */ 25 interface Stoppable { 26 // Starting small, just doing a stoppable/stop for now and keeping it package 27 // protected for now. Needed so don't have to pass RegionServer instance 28 // everywhere. Doing Lifecycle seemed a stretch since none of our servers 29 // do natural start/stop, etc. RegionServer is hosted in a Thread (can't do 30 // 'stop' on a Thread and 'start' has special meaning for Threads) and then 31 // Master is implemented differently again (it is a Thread itself). We 32 // should move to redoing Master and RegionServer servers to use Spring or 33 // some such container but for now, I just need stop -- St.Ack. 34 /** 35 * Stop service. 36 */ 37 public void stop(); 38 }