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.spring;
023
024import java.io.IOException;
025import java.util.Map;
026import java.util.Map.Entry;
027
028import javax.servlet.ServletContext;
029
030import org.granite.config.AbstractFrameworkGraniteConfig;
031import org.granite.logging.Logger;
032import org.granite.messaging.service.ExceptionConverter;
033import org.granite.messaging.service.security.SecurityService;
034import org.granite.util.TypeUtil;
035import org.springframework.beans.factory.InitializingBean;
036import org.springframework.beans.factory.annotation.Autowired;
037import org.springframework.context.ApplicationContext;
038import org.springframework.context.ApplicationContextAware;
039import org.springframework.web.context.ServletContextAware;
040import org.xml.sax.SAXException;
041
042
043public class SpringGraniteConfig extends AbstractFrameworkGraniteConfig implements InitializingBean, ServletContextAware, ApplicationContextAware {
044        
045        private static final Logger log = Logger.getLogger(SpringGraniteConfig.class);
046
047        @Autowired(required=false)
048    private ServletContext servletContext = null;
049    private ApplicationContext applicationContext = null;
050
051    
052        // Determine Spring Security version
053    public static boolean isSpringSecurity3Present() {
054        try {
055                SpringGraniteConfig.class.getClassLoader().loadClass("org.springframework.security.access.AccessDeniedException");
056                return true;
057        }
058        catch (ClassNotFoundException e) {
059        }
060        return false;
061    }
062    public static boolean isSpringSecurity2Present() {
063        try {
064                SpringGraniteConfig.class.getClassLoader().loadClass("org.springframework.security.context.SecurityContext");
065                return true;
066        }
067        catch (ClassNotFoundException e) {
068        }
069        return false;
070    }
071    
072    public void afterPropertiesSet() throws IOException, SAXException {
073        init(servletContext, "org/granite/spring/granite-config-spring.xml");
074        
075        Map<String, ExceptionConverter> exceptionConvertersMap = applicationContext.getBeansOfType(ExceptionConverter.class);
076        for (ExceptionConverter exceptionConverter : exceptionConvertersMap.values())
077            getGraniteConfig().registerExceptionConverter(exceptionConverter, true);
078        
079        if (getGraniteConfig().getSecurityService() == null) {
080                Map<String, ?> servicesMap = applicationContext.getBeansOfType(SecurityService.class);
081                if (servicesMap.size() == 1) {
082                        Entry<String, ?> se = servicesMap.entrySet().iterator().next();
083                        log.info("Found security service %s in Spring context", se.getKey());
084                        getGraniteConfig().setSecurityService((SecurityService)se.getValue());
085                }
086                else {
087                        if (servicesMap.size() > 1)
088                                log.warn("Multiple security services found in Spring context, will use default config");
089                        
090                        // Autodetect and configure Spring Security service
091                        // Load dynamically to avoid runtime dependency on SS
092                        try {
093                                if (isSpringSecurity3Present())
094                                        getGraniteConfig().setSecurityService(TypeUtil.newInstance("org.granite.spring.security.SpringSecurity3Service", SecurityService.class));
095                                else if (isSpringSecurity2Present())
096                                        getGraniteConfig().setSecurityService(TypeUtil.newInstance("org.granite.messaging.service.security.SpringSecurityService", SecurityService.class));
097                        }
098                        catch (Exception e) {
099                                log.error(e, "Could not configure Spring Security service");
100                        }
101                }
102        }
103    }
104    
105    public void setServletContext(ServletContext servletContext) {
106        this.servletContext = servletContext;
107    }
108    
109    public void setApplicationContext(ApplicationContext applicationContext) {
110        this.applicationContext = applicationContext;
111    }
112}