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 */
022package org.granite.tide.spring;
023
024import java.util.Map;
025
026import javax.servlet.ServletContext;
027
028import org.granite.config.flex.Destination;
029import org.granite.context.GraniteContext;
030import org.granite.logging.Logger;
031import org.granite.messaging.service.ExtendedServiceExceptionHandler;
032import org.granite.messaging.service.ServiceException;
033import org.granite.messaging.service.ServiceFactory;
034import org.granite.messaging.service.ServiceInvoker;
035import org.granite.messaging.webapp.HttpGraniteContext;
036import org.granite.tide.TideServiceInvoker;
037import org.granite.tide.data.PersistenceExceptionConverter;
038import org.granite.util.TypeUtil;
039import org.granite.util.XMap;
040import org.springframework.context.ApplicationContext;
041import org.springframework.web.context.support.WebApplicationContextUtils;
042
043import flex.messaging.messages.RemotingMessage;
044
045
046/**
047 * @author Sebastien Deleuze
048 */
049public class SpringServiceFactory extends ServiceFactory {
050    
051        private static final Logger log = Logger.getLogger(SpringServiceFactory.class);
052    
053    public static final String PERSISTENCE_MANAGER_BEAN_NAME = "persistence-manager-bean-name";
054    public static final String ENTITY_MANAGER_FACTORY_BEAN_NAME = "entity-manager-factory-bean-name";
055    
056    private ApplicationContext springContext = null;
057    
058    public void setApplicationContext(ApplicationContext applicationContext) {
059        this.springContext = applicationContext;
060    }
061
062
063    @Override
064    public void configure(XMap properties) throws ServiceException {
065        String sServiceExceptionHandler = properties.get("service-exception-handler");
066        if (sServiceExceptionHandler == null) {
067            XMap props = new XMap(properties);
068            props.put("service-exception-handler", ExtendedServiceExceptionHandler.class.getName());
069            super.configure(props);
070        }
071        else
072            super.configure(properties);
073        
074        GraniteContext graniteContext = GraniteContext.getCurrentInstance();
075        try {
076                graniteContext.getGraniteConfig().registerExceptionConverter(PersistenceExceptionConverter.class);
077        }
078        catch (Throwable t) {
079                log.info(t, "JPA exception converter not registered (JPA not found on classpath)");
080        }
081    }
082
083
084    @Override
085    public ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException {
086        
087        String messageType = request.getClass().getName();
088        String destinationId = request.getDestination();
089
090        GraniteContext context = GraniteContext.getCurrentInstance();
091        Map<String, Object> cache = context.getSessionMap(false);
092        if (cache == null)
093                cache = context.getRequestMap();
094        Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
095        if (destination == null)
096            throw new ServiceException("No matching destination: " + destinationId);
097        
098        String key = TideServiceInvoker.class.getName() + '.' + destinationId;
099        
100        return getServiceInvoker(cache, destination, key);
101        
102    }
103
104    private ServiceInvoker<?> getServiceInvoker(Map<String, Object> cache, Destination destination, String key) {
105        GraniteContext context = GraniteContext.getCurrentInstance();
106        if (context.getSessionMap(false) == null)
107                return internalGetServiceInvoker(cache, destination, key);
108        
109        synchronized (context.getSessionLock()) {
110                return internalGetServiceInvoker(cache, destination, key);
111        }
112    }
113    
114    private ServiceInvoker<?> internalGetServiceInvoker(Map<String, Object> cache, Destination destination, String key) {
115        ServiceInvoker<?> invoker = (ServiceInvoker<?>)cache.get(key);
116        if (invoker == null) {
117            SpringServiceContext tideContext = null;
118            ServletContext sc = ((HttpGraniteContext)GraniteContext.getCurrentInstance()).getServletContext();
119            ApplicationContext springContext = this.springContext != null ? this.springContext : WebApplicationContextUtils.getRequiredWebApplicationContext(sc);
120            Map<String, ?> beans = springContext.getBeansOfType(SpringServiceContext.class);
121            if (beans.size() > 1)
122                throw new RuntimeException("More than one SpringServiceContext bean found");
123            else if (beans.size() == 1)
124                tideContext = (SpringServiceContext)beans.values().iterator().next();
125            else {
126                // Try to create Spring MVC context when Spring MVC available
127                String className = "org.granite.tide.spring.SpringMVCServiceContext";
128                try {
129                        Class<SpringServiceContext> clazz = TypeUtil.forName(className, SpringServiceContext.class);
130                        tideContext = clazz.getConstructor(ApplicationContext.class).newInstance(springContext);
131                }
132                catch (Exception e) {
133                        tideContext = new SpringServiceContext(springContext);
134                }
135            }
136            
137            String persistenceManagerBeanName = destination.getProperties().get(PERSISTENCE_MANAGER_BEAN_NAME);
138                tideContext.setPersistenceManagerBeanName(persistenceManagerBeanName);
139                
140                String entityManagerFactoryBeanName = destination.getProperties().get(ENTITY_MANAGER_FACTORY_BEAN_NAME);
141                tideContext.setEntityManagerFactoryBeanName(entityManagerFactoryBeanName);
142            
143            invoker = new TideServiceInvoker<SpringServiceFactory>(destination, this, tideContext);
144            cache.put(key, invoker);
145        }
146        return invoker;
147    }
148}