1 package org.apache.turbine.services; 2 3 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one 6 * or more contributor license agreements. See the NOTICE file 7 * distributed with this work for additional information 8 * regarding copyright ownership. The ASF licenses this file 9 * to you under the Apache License, Version 2.0 (the 10 * "License"); you may not use this file except in compliance 11 * with the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, 16 * software distributed under the License is distributed on an 17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18 * KIND, either express or implied. See the License for the 19 * specific language governing permissions and limitations 20 * under the License. 21 */ 22 23 24 import org.apache.turbine.pipeline.PipelineData; 25 import org.apache.turbine.util.RunData; 26 27 /** 28 * <p>This class provides a <code>Service</code> implementation that 29 * Services used in Turbine are required to extend. The 30 * functionality provided in addition to <code>BaseService</code> 31 * functionality is recognizing objects used in early initialization 32 * of <code>Services</code> in Turbine, and passing them to 33 * appropriate convenience methods. These methods should be overridden 34 * to provide desired initialization functionality.</p> 35 * 36 * <p><strong>Note!</strong><br>Remember to call 37 * <code>setInit(true)</code> after successful initialization.</p> 38 * 39 * <p><strong>Note!</strong><br>If you need to use another 40 * <code>Service</code> inside your early initialization, remember to 41 * request initialization of that <code>Service</code> before using 42 * it:</p> 43 * 44 * <pre> 45 * getServiceBroker().initClass("OtherService",data); 46 * OtherService service = 47 * (OtherService)getServiceBroker().getService("OtherService"); 48 * </pre> 49 * 50 * @author <a href="mailto:greg@shwoop.com">Greg Ritter</a> 51 * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a> 52 * @author <a href="mailto:burton@apache.org">Kevin Burton</a> 53 * @author <a href="mailto:krzewski@e-point.pl">Rafal Krzewski</a> 54 * @author <a href="mailto:jon@latchkey.com">Jon S. Stevens</a> 55 * @author <a href="mailto:jvanzyl@periapt.com">Jason van Zyl</a> 56 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> 57 * @version $Id: TurbineBaseService.java 1773378 2016-12-09 13:19:59Z tv $ 58 */ 59 public abstract class TurbineBaseService 60 extends BaseService 61 { 62 /** 63 * Performs early initialization. Overrides init() method in 64 * BaseService to detect objects used in Turbine's Service 65 * initialization and pass them to appropriate init() methods. 66 * 67 * @param data An Object to use for initialization activities. 68 * @throws InitializationException if initialization of this 69 * class was not successful. 70 */ 71 @Override 72 public void init(Object data) 73 throws InitializationException 74 { 75 if (data instanceof RunData) 76 { 77 init((RunData) data); 78 } 79 else if (data instanceof PipelineData) 80 { 81 init((PipelineData) data); 82 } 83 } 84 85 /** 86 * Performs early initialization. 87 * 88 * @param pipelineData A PipelineData to use for initialization activities. 89 * @throws InitializationException if initialization of this 90 * class was not successful. 91 */ 92 public void init(PipelineData pipelineData) throws InitializationException 93 { 94 // empty 95 } 96 97 /** 98 * Performs late initialization. 99 * 100 * If your class relies on early initialization, and the object it 101 * expects was not received, you can use late initialization to 102 * throw an exception and complain. 103 * 104 * @throws InitializationException if initialization of this 105 * class was not successful. 106 */ 107 @Override 108 public void init() throws InitializationException 109 { 110 setInit(true); 111 } 112 113 /** 114 * Returns to uninitialized state. 115 * 116 * You can use this method to release resources that your Service 117 * allocated when Turbine shuts down. 118 */ 119 @Override 120 public void shutdown() 121 { 122 setInit(false); 123 } 124 }