/**
* Copyright (C) 2011 JTalks.org 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
*/
package org.jtalks.jcommune.web.interceptors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* This interceptor simply breaks interceptor chain and forwards request to
* the handler directly. We need it, for example, when processing static
* resources. In this case we don't need all these complicated actions
* like database access or localization, which are performed by
* the other interceptors in a chain.
*
* @author Evgeniy Naumenko
*/
public class ChainBreakingInterceptor extends HandlerInterceptorAdapter {
private static final Logger LOGGER = LoggerFactory.getLogger(ChainBreakingInterceptor.class);
/**
* {@inheritDoc}
*/
@Override
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws IOException, ServletException {
if (handler instanceof HttpRequestHandler) {
HttpRequestHandler resourcehandler = ((HttpRequestHandler) handler);
resourcehandler.handleRequest(request, response);
//break interceptor chain
return false;
} else {
LOGGER.warn("handler can not be cast to HttpRequestHandler. It is of class " +
handler.getClass().getCanonicalName());
return true;
}
}
}