001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.messaging.service;
022
023 import java.util.Map;
024 import java.util.concurrent.locks.ReentrantLock;
025
026 import org.granite.config.flex.Destination;
027 import org.granite.config.flex.Factory;
028 import org.granite.context.GraniteContext;
029 import org.granite.logging.Logger;
030 import org.granite.util.ClassUtil;
031 import org.granite.util.XMap;
032
033 import flex.messaging.messages.RemotingMessage;
034
035 /**
036 * @author Franck WOLFF
037 */
038 public abstract class ServiceFactory {
039
040 private static final Logger log = Logger.getLogger(ServiceFactory.class);
041 private static final ReentrantLock lock = new ReentrantLock();
042
043 private ServiceExceptionHandler serviceExceptionHandler;
044
045 public static ServiceFactory getFactoryInstance(RemotingMessage request) throws ServiceException {
046
047 GraniteContext context = GraniteContext.getCurrentInstance();
048
049 String messageType = request.getClass().getName();
050 String destinationId = request.getDestination();
051
052 log.debug(">> Finding factoryId for messageType: %s and destinationId: %s", messageType, destinationId);
053
054 Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
055 if (destination == null)
056 throw new ServiceException("Destination not found: " + destinationId);
057 String factoryId = destination.getProperties().get("factory");
058
059 log.debug(">> Found factoryId: %s", factoryId);
060
061 Map<String, Object> cache = context.getApplicationMap();
062 String key = ServiceFactory.class.getName() + '.' + factoryId;
063
064 return getServiceFactory(cache, context, factoryId, key);
065 }
066
067 private static ServiceFactory getServiceFactory(Map<String, Object> cache, GraniteContext context, String factoryId, String key) {
068 lock.lock();
069 try {
070 ServiceFactory factory = (ServiceFactory)cache.get(key);
071 if (factory == null) {
072
073 log.debug(">> No cached factory for: %s", factoryId);
074
075 Factory config = context.getServicesConfig().findFactoryById(factoryId);
076 if (config == null)
077 config = getDefaultFactoryConfig();
078 try {
079 Class<? extends ServiceFactory> clazz = ClassUtil.forName(config.getClassName(), ServiceFactory.class);
080 factory = clazz.newInstance();
081 factory.configure(config.getProperties());
082 } catch (Exception e) {
083 throw new ServiceException("Could not instantiate factory: " + factory, e);
084 }
085 cache.put(key, factory);
086 }
087 else
088 log.debug(">> Found a cached factory for: %s", factoryId);
089
090 log.debug("<< Returning factory: %s", factory);
091
092 return factory;
093 } finally {
094 lock.unlock();
095 }
096 }
097
098 private static Factory getDefaultFactoryConfig() {
099 return Factory.DEFAULT_FACTORY;
100 }
101
102 public void configure(XMap properties) throws ServiceException {
103
104 log.debug(">> Configuring factory with: %s", properties);
105
106 // service exception handler
107 String sServiceExceptionHandler = properties.get("service-exception-handler");
108 String enableLogging = properties.get("enable-exception-logging");
109 if (sServiceExceptionHandler != null) {
110 try {
111 if (Boolean.TRUE.toString().equals(enableLogging) || Boolean.FALSE.toString().equals(enableLogging))
112 this.serviceExceptionHandler = (ServiceExceptionHandler)ClassUtil.newInstance(sServiceExceptionHandler.trim(),
113 new Class<?>[] { boolean.class }, new Object[] { Boolean.valueOf(enableLogging) });
114 else
115 this.serviceExceptionHandler = (ServiceExceptionHandler)ClassUtil.newInstance(sServiceExceptionHandler.trim());
116 } catch (Exception e) {
117 throw new ServiceException("Could not instantiate service exception handler: " + sServiceExceptionHandler, e);
118 }
119 }
120 else {
121 if (Boolean.TRUE.toString().equals(enableLogging) || Boolean.FALSE.toString().equals(enableLogging))
122 this.serviceExceptionHandler = new DefaultServiceExceptionHandler(Boolean.valueOf(enableLogging));
123 else
124 this.serviceExceptionHandler = new DefaultServiceExceptionHandler();
125 }
126
127 log.debug("<< Configuring factory done: %s", this);
128 }
129
130 public abstract ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException;
131
132 public ServiceExceptionHandler getServiceExceptionHandler() {
133 return serviceExceptionHandler;
134 }
135
136 @Override
137 public String toString() {
138 return toString(null);
139 }
140
141 public String toString(String append) {
142 return super.toString() + " {" +
143 (append != null ? append : "") +
144 "\n serviceExceptionHandler: " + serviceExceptionHandler +
145 "\n}";
146 }
147 }