/*
* Copyright 2007 The Fornax Project Team, including the original
* author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.sculptor.framework.accessimpl.mongodb;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.filter.OncePerRequestFilter;
/**
* This Servlet Filter should be placed in front of Servlets to facilitate lazy
* loading of DomainObject associations in view.
*
* @author Patrik Nordwall
*
*/
public class DbManagerFilter extends OncePerRequestFilter {
public DbManagerFilter() {
}
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
DbManager dbManager = null;
try {
dbManager = lookupDbManager();
DbManager.setThreadInstance(dbManager);
dbManager.requestStart();
filterChain.doFilter(request, response);
} finally {
if (dbManager != null) {
dbManager.requestDone();
DbManager.setThreadInstance(null);
}
}
}
protected DbManager lookupDbManager() {
WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
return (DbManager) wac.getBean("mongodbManager", DbManager.class);
}
}