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 java.util.Map;
025 import java.util.concurrent.locks.ReentrantLock;
026
027 import org.granite.config.flex.Destination;
028 import org.granite.config.flex.Factory;
029 import org.granite.context.GraniteContext;
030 import org.granite.logging.Logger;
031 import org.granite.util.TypeUtil;
032 import org.granite.util.XMap;
033
034 import flex.messaging.messages.RemotingMessage;
035
036 /**
037 * @author Franck WOLFF
038 */
039 public abstract class ServiceFactory {
040
041 private static final Logger log = Logger.getLogger(ServiceFactory.class);
042 private static final ReentrantLock lock = new ReentrantLock();
043
044 private ServiceExceptionHandler serviceExceptionHandler;
045
046 public static ServiceFactory getFactoryInstance(RemotingMessage request) throws ServiceException {
047
048 GraniteContext context = GraniteContext.getCurrentInstance();
049
050 String messageType = request.getClass().getName();
051 String destinationId = request.getDestination();
052
053 log.debug(">> Finding factoryId for messageType: %s and destinationId: %s", messageType, destinationId);
054
055 Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
056 if (destination == null)
057 throw new ServiceException("Destination not found: " + destinationId);
058 String factoryId = destination.getProperties().get("factory");
059
060 log.debug(">> Found factoryId: %s", factoryId);
061
062 Map<String, Object> cache = context.getApplicationMap();
063 String key = ServiceFactory.class.getName() + '.' + factoryId;
064
065 return getServiceFactory(cache, context, factoryId, key);
066 }
067
068 private static ServiceFactory getServiceFactory(Map<String, Object> cache, GraniteContext context, String factoryId, String key) {
069 lock.lock();
070 try {
071 ServiceFactory factory = (ServiceFactory)cache.get(key);
072 if (factory == null) {
073
074 log.debug(">> No cached factory for: %s", factoryId);
075
076 Factory config = context.getServicesConfig().findFactoryById(factoryId);
077 if (config == null)
078 config = getDefaultFactoryConfig();
079 try {
080 Class<? extends ServiceFactory> clazz = TypeUtil.forName(config.getClassName(), ServiceFactory.class);
081 factory = clazz.newInstance();
082 factory.configure(config.getProperties());
083 }
084 catch (Exception e) {
085 throw new ServiceException("Could not instantiate factory: " + factoryId + " of type " + config.getClassName(), e);
086 }
087 cache.put(key, factory);
088 }
089 else
090 log.debug(">> Found a cached factory for: %s", factoryId);
091
092 log.debug("<< Returning factory: %s", factory);
093
094 return factory;
095 } finally {
096 lock.unlock();
097 }
098 }
099
100 private static Factory getDefaultFactoryConfig() {
101 return Factory.DEFAULT_FACTORY;
102 }
103
104 public void configure(XMap properties) throws ServiceException {
105
106 log.debug(">> Configuring factory with: %s", properties);
107
108 // service exception handler
109 String sServiceExceptionHandler = properties.get("service-exception-handler");
110 String enableLogging = properties.get("enable-exception-logging");
111 if (sServiceExceptionHandler != null) {
112 try {
113 if (Boolean.TRUE.toString().equals(enableLogging) || Boolean.FALSE.toString().equals(enableLogging))
114 this.serviceExceptionHandler = (ServiceExceptionHandler)TypeUtil.newInstance(sServiceExceptionHandler.trim(),
115 new Class<?>[] { boolean.class }, new Object[] { Boolean.valueOf(enableLogging) });
116 else
117 this.serviceExceptionHandler = (ServiceExceptionHandler)TypeUtil.newInstance(sServiceExceptionHandler.trim());
118 }
119 catch (Exception e) {
120 throw new ServiceException("Could not instantiate service exception handler: " + sServiceExceptionHandler, e);
121 }
122 }
123 else {
124 if (Boolean.TRUE.toString().equals(enableLogging) || Boolean.FALSE.toString().equals(enableLogging))
125 this.serviceExceptionHandler = new DefaultServiceExceptionHandler(Boolean.valueOf(enableLogging));
126 else
127 this.serviceExceptionHandler = new DefaultServiceExceptionHandler();
128 }
129
130 log.debug("<< Configuring factory done: %s", this);
131 }
132
133 public abstract ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException;
134
135 public ServiceExceptionHandler getServiceExceptionHandler() {
136 return serviceExceptionHandler;
137 }
138
139 @Override
140 public String toString() {
141 return toString(null);
142 }
143
144 public String toString(String append) {
145 return super.toString() + " {" +
146 (append != null ? append : "") +
147 "\n serviceExceptionHandler: " + serviceExceptionHandler +
148 "\n}";
149 }
150 }