| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.commons.proxy.provider.remoting; |
| |
| import org.apache.commons.proxy.ObjectProvider; |
| import org.apache.commons.proxy.ProxyUtils; |
| import org.apache.commons.proxy.exception.ObjectProviderException; |
| |
| import javax.naming.InitialContext; |
| import javax.naming.NamingException; |
| import javax.rmi.PortableRemoteObject; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.Properties; |
| |
| /** |
| * Provides a reference to a session bean by looking up the home object and calling (via reflection) the no-argument |
| * create() method. This will work for both local and remote session beans. |
| * |
| * @author James Carman |
| * @since 1.0 |
| */ |
| public class SessionBeanProvider<T> implements ObjectProvider<T> |
| { |
| //********************************************************************************************************************** |
| // Fields |
| //********************************************************************************************************************** |
| |
| private final String jndiName; |
| private final Class homeInterface; |
| private final Properties properties; |
| |
| //********************************************************************************************************************** |
| // Constructors |
| //********************************************************************************************************************** |
| |
| public SessionBeanProvider( String jndiName, Class homeInterface ) |
| { |
| this.jndiName = jndiName; |
| this.homeInterface = homeInterface; |
| this.properties = null; |
| } |
| |
| public SessionBeanProvider( String jndiName, Class homeInterface, Properties properties ) |
| { |
| this.jndiName = jndiName; |
| this.homeInterface = homeInterface; |
| this.properties = properties; |
| } |
| |
| //********************************************************************************************************************** |
| // ObjectProvider Implementation |
| //********************************************************************************************************************** |
| |
| @SuppressWarnings("unchecked") |
| public T getObject() |
| { |
| try |
| { |
| final InitialContext initialContext = properties == null ? new InitialContext() : |
| new InitialContext(properties); |
| Object homeObject = PortableRemoteObject.narrow(initialContext.lookup(jndiName), homeInterface); |
| final Method createMethod = homeObject.getClass().getMethod("create", ProxyUtils.EMPTY_ARGUMENT_TYPES); |
| return (T)createMethod.invoke(homeObject, ProxyUtils.EMPTY_ARGUMENTS); |
| } |
| catch( NoSuchMethodException e ) |
| { |
| throw new ObjectProviderException( |
| "Unable to find no-arg create() method on home interface " + homeInterface.getName() + ".", e); |
| } |
| catch( IllegalAccessException e ) |
| { |
| throw new ObjectProviderException( |
| "No-arg create() method on home interface " + homeInterface.getName() + " is not accessible.", |
| e); // Should never happen! |
| } |
| catch( NamingException e ) |
| { |
| throw new ObjectProviderException("Unable to lookup EJB home object in JNDI.", e); |
| } |
| catch( InvocationTargetException e ) |
| { |
| throw new ObjectProviderException( |
| "No-arg create() method on home interface " + homeInterface.getName() + " threw an exception.", e); |
| } |
| } |
| } |
| |