001 package org.apache.fulcrum.servicemanager;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements. See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership. The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License. You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied. See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022 import org.apache.avalon.framework.activity.Disposable;
023 import org.apache.avalon.framework.context.Context;
024 import org.apache.avalon.framework.context.ContextException;
025 import org.apache.avalon.framework.context.Contextualizable;
026 import org.apache.avalon.framework.logger.Logger;
027 import org.apache.avalon.framework.logger.LogEnabled;
028 import org.apache.avalon.framework.parameters.ParameterException;
029 import org.apache.avalon.framework.parameters.Parameterizable;
030 import org.apache.avalon.framework.parameters.Parameters;
031 import org.apache.avalon.framework.service.ServiceException;
032 import org.apache.avalon.framework.service.ServiceManager;
033 import org.apache.avalon.framework.service.Serviceable;
034 import org.apache.avalon.framework.configuration.Configuration;
035 import org.apache.avalon.framework.configuration.ConfigurationException;
036 import org.apache.avalon.framework.configuration.Reconfigurable;
037
038 /**
039 * This is a sort of "edelhack" to solve the problem of accessing
040 * the Avalon infrastructure without having an instance of the
041 * container. The implementation stores the very first instance
042 * of itself in a static variable which can be accessed using
043 * getInstance().
044 *
045 * This allows access to the various Avalon artifacts.
046 *
047 * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
048 */
049
050 public class ServiceManagerServiceImpl
051 implements ServiceManagerService, LogEnabled, Contextualizable, Reconfigurable, Parameterizable, Serviceable, Disposable
052 {
053 /** The one and only instance */
054 private static ServiceManagerServiceImpl instance;
055
056 /** Store the Avalon logger */
057 private Logger logger;
058
059 /** Store the ServiceContainer on a per instance base */
060 private ServiceManager serviceManager;
061
062 /** Store the passed parameters on a per instance base */
063 private Parameters parameters;
064
065 /** Store the passed context on a per instance base */
066 private Context context;
067
068 /** Store the passed configuration on a per instance base */
069 private Configuration configuration;
070
071 /**
072 * Constructor
073 */
074 public ServiceManagerServiceImpl()
075 {
076 setInstance(this);
077 }
078
079 /////////////////////////////////////////////////////////////////////////
080 // Avalon Lifecycle Implementation
081 /////////////////////////////////////////////////////////////////////////
082
083 /**
084 * @see org.apache.avalon.framework.logger.LogEnabled#enableLogging(org.apache.avalon.framework.logger.Logger)
085 */
086 public void enableLogging(Logger logger)
087 {
088 this.logger = logger;
089 }
090
091 /**
092 * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
093 */
094 public void service(ServiceManager serviceManager) throws ServiceException
095 {
096 this.serviceManager = serviceManager;
097 }
098
099 /**
100 * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
101 */
102 public void contextualize(Context context) throws ContextException
103 {
104 this.context = context;
105 }
106
107 /**
108 * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
109 */
110 public void configure(Configuration configuration) throws ConfigurationException
111 {
112 this.configuration = configuration;
113 }
114
115 /**
116 * @see org.apache.avalon.framework.configuration.Reconfigurable#reconfigure(org.apache.avalon.framework.configuration.Configuration)
117 */
118 public void reconfigure(Configuration configuration) throws ConfigurationException
119 {
120 this.configuration = configuration;
121 }
122
123 /**
124 * @see org.apache.avalon.framework.parameters.Parameterizable#parameterize(org.apache.avalon.framework.parameters.Parameters)
125 */
126 public void parameterize(Parameters parameters) throws ParameterException
127 {
128 this.parameters = parameters;
129 }
130
131 /**
132 * @see org.apache.avalon.framework.activity.Disposable#dispose()
133 */
134 public void dispose()
135 {
136 this.serviceManager = null;
137 this.parameters = null;
138 this.context = null;
139 this.configuration = null;
140 this.logger = null;
141 ServiceManagerServiceImpl.instance = null;
142 }
143
144 /////////////////////////////////////////////////////////////////////////
145 // Service Interface Implementation
146 /////////////////////////////////////////////////////////////////////////
147
148 /**
149 * @see org.apache.avalon.framework.service.ServiceManager#hasService(java.lang.String)
150 */
151 public boolean hasService(String name)
152 {
153 return this.serviceManager.hasService(name);
154 }
155
156 /**
157 * @see org.apache.avalon.framework.service.ServiceManager#lookup(java.lang.String)
158 */
159 public Object lookup(String name) throws ServiceException
160 {
161 return this.serviceManager.lookup(name);
162 }
163
164 /**
165 * @see org.apache.avalon.framework.service.ServiceManager#release(java.lang.Object)
166 */
167 public void release(Object object)
168 {
169 this.serviceManager.release(object);
170 }
171
172 /**
173 * @return the ServiceManager for the container
174 */
175 public ServiceManager getServiceManager()
176 {
177 return this.serviceManager;
178 }
179
180 /**
181 * @return the Parameters for the container
182 */
183 public Parameters getParameters()
184 {
185 return this.parameters;
186 }
187
188 /**
189 * @return the Context for the container
190 */
191 public Context getContext()
192 {
193 return this.context;
194 }
195
196 /**
197 * @see org.apache.fulcrum.servicemanager.ServiceManagerService#getLogger()
198 */
199 public Logger getLogger()
200 {
201 return this.logger;
202 }
203
204 /**
205 * @see org.apache.fulcrum.servicemanager.ServiceManagerService#getConfiguration()
206 */
207 public Configuration getConfiguration()
208 {
209 return this.configuration;
210 }
211
212 /////////////////////////////////////////////////////////////////////////
213 // Service Implementation
214 /////////////////////////////////////////////////////////////////////////
215
216 /**
217 * @return the one and only instance of this class
218 */
219 public static synchronized ServiceManagerService getInstance()
220 {
221 return instance;
222 }
223
224 /**
225 * Create the one and only instance
226 * @param instance the instance
227 */
228 protected static synchronized void setInstance( ServiceManagerServiceImpl instance )
229 {
230 ServiceManagerServiceImpl.instance = instance;
231 }
232 }