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.config.flex;
022
023import java.io.IOException;
024import java.io.InputStream;
025
026import javax.servlet.ServletContext;
027import javax.servlet.ServletException;
028
029import org.granite.config.GraniteConfig;
030import org.granite.config.ServletGraniteConfig;
031import org.granite.config.api.Configuration;
032import org.granite.util.ServletParams;
033 
034/**
035 * @author Franck WOLFF
036 */
037public class ServletServicesConfig {
038
039    ///////////////////////////////////////////////////////////////////////////
040    // Fields.
041
042    private static final String SERVICES_CONFIG_KEY = ServletServicesConfig.class.getName() + "_CACHE";
043
044
045    ///////////////////////////////////////////////////////////////////////////
046    // Instance fields.
047
048    private ServicesConfig config = null;
049
050    
051    private ServletServicesConfig(ServletContext context, ServicesConfig config) {
052        this.config = config;
053    }
054
055    public static synchronized ServletServicesConfig getServletConfig(ServletContext context) {
056        return (ServletServicesConfig)context.getAttribute(SERVICES_CONFIG_KEY);
057    }
058    
059    ///////////////////////////////////////////////////////////////////////////
060    // Static ServicesConfig loaders.
061    
062    public static synchronized ServicesConfig loadConfig(ServletContext context) throws ServletException {
063        ServletServicesConfig servletServicesConfig = (ServletServicesConfig)context.getAttribute(SERVICES_CONFIG_KEY);
064
065        if (servletServicesConfig == null) {
066                String path = null;
067                
068                Configuration configuration = (Configuration)context.getAttribute(ServletGraniteConfig.GRANITE_CONFIG_CONFIGURATION_KEY);
069                if (configuration != null)
070                        path = configuration.getFlexServicesConfig();
071                
072                if (path == null)
073                        path = ServletParams.get(context, "servicesConfigPath", String.class, null);
074                
075            if (path == null)
076                path = "/WEB-INF/flex/services-config.xml";
077
078            InputStream is = context.getResourceAsStream(path);
079
080            try {
081                GraniteConfig graniteConfig = ServletGraniteConfig.loadConfig(context);
082                ServicesConfig servicesConfig = new ServicesConfig(is, configuration, graniteConfig.getScan());
083                
084                servletServicesConfig = loadConfig(context, servicesConfig);
085            }
086            catch (Exception e) {
087                throw new ServletException("Could not load custom services-config.xml", e);
088            }
089            finally {
090                try {
091                        if (is != null)
092                                is.close();
093                } catch (IOException e) {
094                        // Ignore...
095                }
096            }
097            
098            context.setAttribute(SERVICES_CONFIG_KEY, servletServicesConfig);
099        }
100
101        return servletServicesConfig.config;
102    }
103
104    public static synchronized ServletServicesConfig loadConfig(ServletContext context, ServicesConfig servicesConfig) {
105        ServletServicesConfig servletServicesConfig = new ServletServicesConfig(context, servicesConfig);
106        
107        context.setAttribute(SERVICES_CONFIG_KEY, servletServicesConfig);
108        
109        return servletServicesConfig;
110    }
111}