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.spring;
022    
023    import java.io.IOException;
024    import java.util.Map;
025    import java.util.Map.Entry;
026    
027    import javax.servlet.ServletContext;
028    
029    import org.granite.config.AbstractFrameworkGraniteConfig;
030    import org.granite.logging.Logger;
031    import org.granite.messaging.service.security.SecurityService;
032    import org.granite.util.ClassUtil;
033    import org.springframework.beans.factory.InitializingBean;
034    import org.springframework.beans.factory.annotation.Autowired;
035    import org.springframework.context.ApplicationContext;
036    import org.springframework.context.ApplicationContextAware;
037    import org.springframework.web.context.ServletContextAware;
038    import org.xml.sax.SAXException;
039    
040    
041    public class SpringGraniteConfig extends AbstractFrameworkGraniteConfig implements InitializingBean, ServletContextAware, ApplicationContextAware {
042            
043            private static final Logger log = Logger.getLogger(SpringGraniteConfig.class);
044    
045            @Autowired(required=false)
046        private ServletContext servletContext = null;
047        private ApplicationContext applicationContext = null;
048    
049        
050            // Determine Spring Security version
051        public static boolean isSpringSecurity3Present() {
052            try {
053                    SpringGraniteConfig.class.getClassLoader().loadClass("org.springframework.security.access.AccessDeniedException");
054                    return true;
055            }
056            catch (ClassNotFoundException e) {
057            }
058            return false;
059        }
060        public static boolean isSpringSecurity2Present() {
061            try {
062                    SpringGraniteConfig.class.getClassLoader().loadClass("org.springframework.security.context.SecurityContext");
063                    return true;
064            }
065            catch (ClassNotFoundException e) {
066            }
067            return false;
068        }
069        
070        public void afterPropertiesSet() throws IOException, SAXException {
071            init(servletContext, "org/granite/spring/granite-config-spring.xml");
072            
073            if (getGraniteConfig().getSecurityService() == null) {
074                    Map<String, ?> servicesMap = applicationContext.getBeansOfType(SecurityService.class);
075                    if (servicesMap.size() == 1) {
076                            Entry<String, ?> se = servicesMap.entrySet().iterator().next();
077                            log.info("Found security service %s in Spring context", se.getKey());
078                            getGraniteConfig().setSecurityService((SecurityService)se.getValue());
079                    }
080                    else {
081                            if (servicesMap.size() > 1)
082                                    log.warn("Multiple security services found in Spring context, will use default config");
083                            
084                            // Autodetect and configure Spring Security service
085                            // Load dynamically to avoid runtime dependency on SS
086                            try {
087                                    if (isSpringSecurity3Present())
088                                            getGraniteConfig().setSecurityService(ClassUtil.newInstance("org.granite.spring.security.SpringSecurity3Service", SecurityService.class));
089                                    else if (isSpringSecurity2Present())
090                                            getGraniteConfig().setSecurityService(ClassUtil.newInstance("org.granite.messaging.service.security.SpringSecurityService", SecurityService.class));
091                            }
092                            catch (Exception e) {
093                                    throw new IOException("Could not configure Spring Security service");
094                            }
095                    }
096            }
097        }
098        
099        public void setServletContext(ServletContext servletContext) {
100            this.servletContext = servletContext;
101        }
102        
103        public void setApplicationContext(ApplicationContext applicationContext) {
104            this.applicationContext = applicationContext;
105        }
106    }