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.gravity.adapters;
022
023 import java.io.Serializable;
024 import java.util.ArrayList;
025 import java.util.List;
026 import java.util.Map;
027 import java.util.concurrent.ConcurrentHashMap;
028 import java.util.concurrent.locks.ReentrantLock;
029
030 import org.granite.config.flex.Adapter;
031 import org.granite.config.flex.Destination;
032 import org.granite.context.GraniteContext;
033 import org.granite.gravity.Gravity;
034 import org.granite.logging.Logger;
035 import org.granite.messaging.service.ServiceException;
036 import org.granite.util.ClassUtil;
037
038 import flex.messaging.messages.AsyncMessage;
039 import flex.messaging.messages.CommandMessage;
040 import flex.messaging.messages.Message;
041
042 /**
043 * @author William DRAI
044 */
045 public class AdapterFactory implements Serializable {
046
047 private static final long serialVersionUID = 1L;
048
049
050 private static final Logger log = Logger.getLogger(AdapterFactory.class);
051 private static final ReentrantLock lock = new ReentrantLock();
052
053 private Gravity gravity;
054 private Map<String, ServiceAdapter> adaptersCache = new ConcurrentHashMap<String, ServiceAdapter>();
055 private List<ServiceAdapter> adapters = new ArrayList<ServiceAdapter>();
056 private static Class<SimpleServiceAdapter> defaultAdapterClass = SimpleServiceAdapter.class;
057
058
059 public AdapterFactory(Gravity gravity) {
060 this.gravity = gravity;
061 }
062
063
064 public ServiceAdapter getServiceAdapter(Message request) throws ServiceException {
065
066 String messageType = request.getClass().getName();
067 if (request instanceof CommandMessage)
068 messageType = ((CommandMessage)request).getMessageRefType();
069 if (messageType == null)
070 messageType = AsyncMessage.class.getName();
071 String destinationId = request.getDestination();
072
073 return getServiceAdapter(messageType, destinationId);
074 }
075
076 public ServiceAdapter getServiceAdapter(String messageType, String destinationId) throws ServiceException {
077 GraniteContext context = GraniteContext.getCurrentInstance();
078
079 log.debug(">> Finding serviceAdapter for messageType: %s and destinationId: %s", messageType, destinationId);
080
081 Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
082 if (destination == null) {
083 log.debug(">> No destination found: %s", destinationId);
084 return null;
085 }
086 Adapter adapter = destination.getAdapter();
087
088 String key = null;
089
090 if (adapter != null) {
091 log.debug(">> Found adapterRef: %s", adapter.getId());
092 key = AdapterFactory.class.getName() + '@' + destination.getId() + '.' + adapter.getId();
093 }
094 else
095 key = defaultAdapterClass.getName() + '@' + destination.getId();
096
097 return getServiceAdapter(adaptersCache, context, destination, key, adapter != null ? adapter.getId() : null);
098 }
099
100 private ServiceAdapter getServiceAdapter(Map<String, ServiceAdapter> cache, GraniteContext context, Destination destination, String key, String adapterId) {
101 lock.lock();
102 try {
103 ServiceAdapter serviceAdapter = cache.get(key);
104 if (serviceAdapter == null) {
105 log.debug(">> No cached factory for: %s", adapterId);
106
107 Adapter config = destination.getAdapter();
108 try {
109 Class<? extends ServiceAdapter> clazz = (adapterId != null)
110 ? ClassUtil.forName(config.getClassName(), ServiceAdapter.class)
111 : defaultAdapterClass;
112 serviceAdapter = clazz.newInstance();
113 serviceAdapter.setId(adapterId);
114 serviceAdapter.setGravity(gravity);
115 serviceAdapter.configure(config.getProperties(), destination.getProperties());
116 serviceAdapter.start();
117
118 adapters.add(serviceAdapter);
119 }
120 catch (ServiceException e) {
121 throw e;
122 }
123 catch (Exception e) {
124 throw new ServiceException("Could not instantiate serviceAdapter: " + config, e);
125 }
126 cache.put(key, serviceAdapter);
127 }
128 else
129 log.debug(">> Found a cached serviceAdapter for ref: %s", destination.getAdapter());
130
131 log.debug("<< Returning serviceAdapter: %s", serviceAdapter);
132
133 serviceAdapter.setDestination(destination);
134 return serviceAdapter;
135 } finally {
136 lock.unlock();
137 }
138 }
139
140
141 public void stopAll() {
142 for (ServiceAdapter adapter : adapters) {
143 adapter.stop();
144 }
145 }
146
147
148 @Override
149 public String toString() {
150 return toString(null);
151 }
152
153 public String toString(String append) {
154 return super.toString() + " {" +
155 (append != null ? append : "") +
156 "\n}";
157 }
158 }