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.config.flex;
023
024import java.io.IOException;
025import java.io.InputStream;
026
027import javax.servlet.ServletContext;
028import javax.servlet.ServletException;
029
030import org.granite.config.GraniteConfig;
031import org.granite.config.ServletGraniteConfig;
032import org.granite.config.api.Configuration;
033import org.granite.util.ServletParams;
034 
035/**
036 * @author Franck WOLFF
037 */
038public class ServletServicesConfig {
039
040    ///////////////////////////////////////////////////////////////////////////
041    // Fields.
042
043    private static final String SERVICES_CONFIG_KEY = ServletServicesConfig.class.getName() + "_CACHE";
044
045
046    ///////////////////////////////////////////////////////////////////////////
047    // Instance fields.
048
049    private ServicesConfig config = null;
050
051    
052    private ServletServicesConfig(ServletContext context, ServicesConfig config) {
053        this.config = config;
054    }
055
056    public static synchronized ServletServicesConfig getServletConfig(ServletContext context) {
057        return (ServletServicesConfig)context.getAttribute(SERVICES_CONFIG_KEY);
058    }
059    
060    ///////////////////////////////////////////////////////////////////////////
061    // Static ServicesConfig loaders.
062
063    public static synchronized ServicesConfig loadConfig(ServletContext context) throws ServletException {
064        return loadConfig(context, false);
065    }
066
067    public static synchronized ServicesConfig loadConfig(ServletContext context, boolean skipScan) throws ServletException {
068        ServletServicesConfig servletServicesConfig = (ServletServicesConfig)context.getAttribute(SERVICES_CONFIG_KEY);
069
070        if (servletServicesConfig == null) {
071                String path = null;
072                
073                Configuration configuration = (Configuration)context.getAttribute(ServletGraniteConfig.GRANITE_CONFIG_CONFIGURATION_KEY);
074                if (configuration != null)
075                        path = configuration.getFlexServicesConfig();
076                
077                if (path == null)
078                        path = ServletParams.get(context, "servicesConfigPath", String.class, null);
079                
080            if (path == null)
081                path = "/WEB-INF/flex/services-config.xml";
082
083            InputStream is = context.getResourceAsStream(path);
084
085            try {
086                GraniteConfig graniteConfig = ServletGraniteConfig.loadConfig(context);
087                ServicesConfig servicesConfig = new ServicesConfig(is, configuration, skipScan ? false : graniteConfig.getScan());
088                
089                servletServicesConfig = loadConfig(context, servicesConfig);
090            }
091            catch (Exception e) {
092                throw new ServletException("Could not load custom services-config.xml", e);
093            }
094            finally {
095                try {
096                        if (is != null)
097                                is.close();
098                } catch (IOException e) {
099                        // Ignore...
100                }
101            }
102            
103            context.setAttribute(SERVICES_CONFIG_KEY, servletServicesConfig);
104        }
105
106        return servletServicesConfig.config;
107    }
108
109    public static synchronized ServletServicesConfig loadConfig(ServletContext context, ServicesConfig servicesConfig) {
110        ServletServicesConfig servletServicesConfig = new ServletServicesConfig(context, servicesConfig);
111        
112        context.setAttribute(SERVICES_CONFIG_KEY, servletServicesConfig);
113        
114        return servletServicesConfig;
115    }
116}