/**
* Vosao CMS. Simple CMS for Google App Engine.
*
* Copyright (C) 2009-2010 Vosao development team.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* email: vosao.dev@gmail.com
*/
package org.vosao.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.jabsorb.JSONRPCBridge;
import org.vosao.common.VosaoContext;
import org.vosao.service.BackService;
import org.vosao.service.FrontService;
public class ServiceFilter extends AbstractFilter implements Filter {
public ServiceFilter() {
super();
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpSession session = httpRequest.getSession(true);
VosaoContext ctx = VosaoContext.getInstance();
boolean backService = isLoggedIn(httpRequest)
&& ctx.getUser() != null
&& !ctx.getUser().isSiteUser();
enableFrontService(session);
if (backService) {
enableBackService(session);
}
chain.doFilter(request, response);
disableFrontService(session);
if (backService) {
disableBackService(session);
}
}
private void enableBackService(HttpSession session) {
JSONRPCBridge bridge = getJSONRPCBridge(session);
getBackService().register(bridge);
}
private void enableFrontService(HttpSession session) {
JSONRPCBridge bridge = getJSONRPCBridge(session);
getFrontService().register(bridge);
}
private void disableBackService(HttpSession session) {
JSONRPCBridge bridge = getJSONRPCBridge(session);
getBackService().unregister(bridge);
}
private void disableFrontService(HttpSession session) {
JSONRPCBridge bridge = getJSONRPCBridge(session);
getFrontService().unregister(bridge);
}
private JSONRPCBridge getJSONRPCBridge(HttpSession session) {
if (session.getAttribute("JSONRPCBridge") == null) {
session.setAttribute("JSONRPCBridge", new JSONRPCBridge());
}
return (JSONRPCBridge) session.getAttribute("JSONRPCBridge");
}
private FrontService getFrontService() {
return VosaoContext.getInstance().getFrontService();
}
private BackService getBackService() {
return VosaoContext.getInstance().getBackService();
}
}