001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.messaging.service;
023
024 import javax.ejb.NoSuchEJBException;
025 import javax.naming.NamingException;
026
027 import org.granite.config.flex.Destination;
028 import org.granite.logging.Logger;
029
030 /**
031 * @author Franck WOLFF
032 */
033 public class EjbServiceInvoker extends ServiceInvoker<EjbServiceFactory> {
034
035 private static final Logger log = Logger.getLogger(EjbServiceInvoker.class);
036
037 public static final String CAPITALIZED_DESTINATION_ID = "{capitalized.destination.id}";
038 public static final String DESTINATION_ID = "{destination.id}";
039
040 private final EjbServiceMetadata metadata;
041
042 public EjbServiceInvoker(Destination destination, EjbServiceFactory factory) throws ServiceException {
043 super(destination, factory);
044
045 String lookup = factory.getLookup();
046 if (destination.getProperties().containsKey("lookup"))
047 lookup = destination.getProperties().get("lookup");
048
049 // Compute EJB JNDI binding.
050 String name = destination.getId();
051 if (lookup != null) {
052 name = lookup;
053 if (lookup.contains(CAPITALIZED_DESTINATION_ID))
054 name = lookup.replace(CAPITALIZED_DESTINATION_ID, capitalize(destination.getId()));
055 if (lookup.contains(DESTINATION_ID))
056 name = lookup.replace(DESTINATION_ID, destination.getId());
057 }
058
059 log.debug(">> New EjbServiceInvoker looking up: %s", name);
060
061 try {
062 invokee = factory.lookup(name);
063 } catch (NamingException e) {
064 throw new ServiceException("Could not lookup for: " + name, e);
065 }
066
067 this.metadata = destination.getScannedClass() != null ?
068 new EjbServiceMetadata(destination.getScannedClass(), invokee.getClass()) :
069 new EjbServiceMetadata(destination.getProperties(), invokee.getClass());
070 }
071
072 public EjbServiceMetadata getMetadata() {
073 return metadata;
074 }
075
076 @Override
077 protected void afterInvocationError(ServiceInvocationContext context, Throwable error) {
078 // "A NoSuchEJBException is thrown if an attempt is made to invoke a method
079 // on an object that no longer exists" (javadoc on NoSuchEJBException).
080 if (error instanceof NoSuchEJBException || (
081 metadata.isStateful() &&
082 metadata.isRemoveMethod(context.getMethod()) &&
083 !metadata.getRetainIfException(context.getMethod())
084 ))
085 factory.removeFromCache(destination.getId());
086 }
087
088 @Override
089 protected Object afterInvocation(ServiceInvocationContext context, Object result) {
090 if (metadata.isStateful() && metadata.isRemoveMethod(context.getMethod()))
091 factory.removeFromCache(destination.getId());
092 return result;
093 }
094
095 private String capitalize(String s) {
096 if (s == null || s.length() == 0)
097 return s;
098 if (s.length() == 1)
099 return s.toUpperCase();
100 return s.substring(0, 1).toUpperCase() + s.substring(1);
101 }
102 }