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
021package org.granite.tide.spring;
022
023import java.util.Map;
024
025import javax.servlet.ServletContext;
026
027import org.granite.config.flex.Destination;
028import org.granite.context.GraniteContext;
029import org.granite.logging.Logger;
030import org.granite.messaging.service.ExtendedServiceExceptionHandler;
031import org.granite.messaging.service.ServiceException;
032import org.granite.messaging.service.ServiceFactory;
033import org.granite.messaging.service.ServiceInvoker;
034import org.granite.messaging.webapp.HttpGraniteContext;
035import org.granite.tide.TideServiceInvoker;
036import org.granite.tide.data.PersistenceExceptionConverter;
037import org.granite.util.TypeUtil;
038import org.granite.util.XMap;
039import org.springframework.context.ApplicationContext;
040import org.springframework.web.context.support.WebApplicationContextUtils;
041
042import flex.messaging.messages.RemotingMessage;
043
044
045/**
046 * @author Sebastien Deleuze
047 */
048public class SpringServiceFactory extends ServiceFactory {
049    
050        private static final Logger log = Logger.getLogger(SpringServiceFactory.class);
051    
052    public static final String PERSISTENCE_MANAGER_BEAN_NAME = "persistence-manager-bean-name";
053    public static final String ENTITY_MANAGER_FACTORY_BEAN_NAME = "entity-manager-factory-bean-name";
054    
055    private ApplicationContext springContext = null;
056    
057    public void setApplicationContext(ApplicationContext applicationContext) {
058        this.springContext = applicationContext;
059    }
060
061
062    @Override
063    public void configure(XMap properties) throws ServiceException {
064        String sServiceExceptionHandler = properties.get("service-exception-handler");
065        if (sServiceExceptionHandler == null) {
066            XMap props = new XMap(properties);
067            props.put("service-exception-handler", ExtendedServiceExceptionHandler.class.getName());
068            super.configure(props);
069        }
070        else
071            super.configure(properties);
072        
073        GraniteContext graniteContext = GraniteContext.getCurrentInstance();
074        try {
075                graniteContext.getGraniteConfig().registerExceptionConverter(PersistenceExceptionConverter.class);
076        }
077        catch (Throwable t) {
078                log.info(t, "JPA exception converter not registered (JPA not found on classpath)");
079        }
080    }
081
082
083    @Override
084    public ServiceInvoker<?> getServiceInstance(RemotingMessage request) throws ServiceException {
085        
086        String messageType = request.getClass().getName();
087        String destinationId = request.getDestination();
088
089        GraniteContext context = GraniteContext.getCurrentInstance();
090        Map<String, Object> cache = context.getSessionMap(false);
091        if (cache == null)
092                cache = context.getRequestMap();
093        Destination destination = context.getServicesConfig().findDestinationById(messageType, destinationId);
094        if (destination == null)
095            throw new ServiceException("No matching destination: " + destinationId);
096        
097        String key = TideServiceInvoker.class.getName() + '.' + destinationId;
098        
099        return getServiceInvoker(cache, destination, key);
100        
101    }
102
103    private ServiceInvoker<?> getServiceInvoker(Map<String, Object> cache, Destination destination, String key) {
104        GraniteContext context = GraniteContext.getCurrentInstance();
105        if (context.getSessionMap(false) == null)
106                return internalGetServiceInvoker(cache, destination, key);
107        
108        synchronized (context.getSessionLock()) {
109                return internalGetServiceInvoker(cache, destination, key);
110        }
111    }
112    
113    private ServiceInvoker<?> internalGetServiceInvoker(Map<String, Object> cache, Destination destination, String key) {
114        ServiceInvoker<?> invoker = (ServiceInvoker<?>)cache.get(key);
115        if (invoker == null) {
116            SpringServiceContext tideContext = null;
117            ServletContext sc = ((HttpGraniteContext)GraniteContext.getCurrentInstance()).getServletContext();
118            ApplicationContext springContext = this.springContext != null ? this.springContext : WebApplicationContextUtils.getRequiredWebApplicationContext(sc);
119            Map<String, ?> beans = springContext.getBeansOfType(SpringServiceContext.class);
120            if (beans.size() > 1)
121                throw new RuntimeException("More than one SpringServiceContext bean found");
122            else if (beans.size() == 1)
123                tideContext = (SpringServiceContext)beans.values().iterator().next();
124            else {
125                // Try to create Spring MVC context when Spring MVC available
126                String className = "org.granite.tide.spring.SpringMVCServiceContext";
127                try {
128                        Class<SpringServiceContext> clazz = TypeUtil.forName(className, SpringServiceContext.class);
129                        tideContext = clazz.getConstructor(ApplicationContext.class).newInstance(springContext);
130                }
131                catch (Exception e) {
132                        tideContext = new SpringServiceContext(springContext);
133                }
134            }
135            
136            String persistenceManagerBeanName = destination.getProperties().get(PERSISTENCE_MANAGER_BEAN_NAME);
137                tideContext.setPersistenceManagerBeanName(persistenceManagerBeanName);
138                
139                String entityManagerFactoryBeanName = destination.getProperties().get(ENTITY_MANAGER_FACTORY_BEAN_NAME);
140                tideContext.setEntityManagerFactoryBeanName(entityManagerFactoryBeanName);
141            
142            invoker = new TideServiceInvoker<SpringServiceFactory>(destination, this, tideContext);
143            cache.put(key, invoker);
144        }
145        return invoker;
146    }
147}