/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) frentix GmbH<br>
* http://www.frentix.com<br>
* <p>
*/
package org.olat.core.servlets;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.olat.core.commons.persistence.DBFactory;
import org.olat.core.dispatcher.DispatcherAction;
import org.olat.core.logging.OLog;
import org.olat.core.logging.Tracing;
/**
* Description:<br>
* Use this servlet filter to prepare the servlet request and cleanup database
* related stuff after the request finished.
*
* <P>
* Initial Date: 29.06.2009 <br>
*
* @author gnaegi
*/
public class ServletWrapperFilter implements Filter {
private static final OLog log = Tracing.createLoggerFor(ServletWrapperFilter.class);
/**
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
public void init(FilterConfig config) throws ServletException {
// no configuration
}
/**
* @see javax.servlet.Filter#destroy()
*/
public void destroy() {
// nothing to destroy
}
/**
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
* javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain target) throws IOException,
ServletException {
if (!(servletRequest instanceof HttpServletRequest)) {
// don't know what to do, just execute target and quitt
target.doFilter(servletRequest, servletResponse);
return;
}
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
Tracing.setUreq(request);
boolean success = false;
try {
// execute other filters or request
target.doFilter(request, response);
DBFactory.getInstance(false).commitAndCloseSession();
success = true;
} catch (Throwable e) {
log.error("Exception in ServletWrapperFilter", e);
DispatcherAction.sendBadRequest(request.getPathInfo(), response);
} finally {
// execute the cleanup code for this request
Tracing.setUreq(null);
if (!success) {
DBFactory.getInstance().rollbackAndCloseSession();
}
}
}
}