1   /**
    2    *  Licensed to the Apache Software Foundation (ASF) under one or more
    3    *  contributor license agreements.  See the NOTICE file distributed with
    4    *  this work for additional information regarding copyright ownership.
    5    *  The ASF licenses this file to You under the Apache License, Version 2.0
    6    *  (the "License"); you may not use this file except in compliance with
    7    *  the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    *  Unless required by applicable law or agreed to in writing, software
   12    *  distributed under the License is distributed on an "AS IS" BASIS,
   13    *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    *  See the License for the specific language governing permissions and
   15    *  limitations under the License.
   16    */
   17   package org.apache.geronimo.concurrent.impl.context;
   18   
   19   import java.util.List;
   20   
   21   import org.apache.geronimo.concurrent.ManagedContextHandler;
   22   import org.apache.geronimo.concurrent.ManagedContextHandlerChain;
   23   import org.apache.geronimo.concurrent.context.BasicContextService;
   24   import org.apache.geronimo.concurrent.impl.ContextHandlerUtils;
   25   import org.apache.geronimo.concurrent.naming.ModuleAwareResourceSource;
   26   import org.apache.geronimo.gbean.AbstractName;
   27   import org.apache.geronimo.gbean.GBeanInfo;
   28   import org.apache.geronimo.gbean.GBeanInfoBuilder;
   29   import org.apache.geronimo.kernel.Kernel;
   30   
   31   public class ContextServiceGBean implements ModuleAwareResourceSource {
   32   
   33       public static final GBeanInfo GBEAN_INFO;
   34       
   35       private ManagedContextHandlerChain mainContextHandler;
   36       private BasicContextService contextService;
   37   
   38       public ContextServiceGBean(Kernel kernel, 
   39                                  ClassLoader classLoader,
   40                                  AbstractName name,
   41                                  String[] contextHandlerClasses) {
   42           List<ManagedContextHandler> handlers = 
   43               ContextHandlerUtils.loadHandlers(classLoader, contextHandlerClasses);
   44           this.mainContextHandler = new ManagedContextHandlerChain(handlers);
   45       }
   46       
   47       private synchronized BasicContextService getContextService() {
   48           if (this.contextService == null) {
   49               this.contextService = new BasicContextService(this.mainContextHandler);            
   50           }
   51           return this.contextService;
   52       }
   53       
   54       public Object $getResource(AbstractName moduleID) {
   55           return new ContextServiceModuleFacade(getContextService(), moduleID);
   56       }
   57       
   58       static {
   59           GBeanInfoBuilder infoFactory = GBeanInfoBuilder.createStatic(ContextServiceGBean.class, "ContextService");
   60   
   61           infoFactory.addAttribute("classLoader", ClassLoader.class, false, false);
   62           infoFactory.addAttribute("abstractName", AbstractName.class, false, false);
   63           infoFactory.addAttribute("kernel", Kernel.class, false, false);
   64           
   65           infoFactory.addAttribute("contextHandlers", String[].class, true);
   66   
   67           infoFactory.setConstructor(new String[] {"kernel", 
   68                                                    "classLoader", 
   69                                                    "abstractName",
   70                                                    "contextHandlers"} );
   71           
   72           GBEAN_INFO = infoFactory.getBeanInfo();
   73       }
   74   
   75       public static GBeanInfo getGBeanInfo() {
   76           return GBEAN_INFO;
   77       }
   78            
   79   }