/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.webapp;
import com.caucho.server.http.AbstractHttpRequest;
import com.caucho.server.http.AbstractHttpResponse;
import com.caucho.transaction.TransactionImpl;
import com.caucho.transaction.TransactionManagerImpl;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.transaction.Status;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Represents the next filter in a filter chain. The final filter will
* be the servlet itself.
*/
public class ContextFilterChain implements FilterChain {
private static final Logger log
= Logger.getLogger(ContextFilterChain.class.getName());
// Next filter chain
private FilterChain _next;
// class loader
private ClassLoader _classLoader;
// transaction manager
private TransactionManagerImpl _tm;
// error page manager
private ErrorPageManager _errorPageManager;
/**
* Creates a new FilterChainFilter.
*
* @param next the next filterChain
* @param filter the user's filter
*/
public ContextFilterChain(FilterChain next)
{
_next = next;
_classLoader = Thread.currentThread().getContextClassLoader();
try {
_tm = TransactionManagerImpl.getInstance();
} catch (Throwable e) {
log.log(Level.WARNING, e.toString(), e);
}
}
/**
* Sets the error page manager.
*/
public void setErrorPageManager(ErrorPageManager errorPageManager)
{
_errorPageManager = errorPageManager;
}
/**
* Invokes the next filter in the chain or the final servlet at
* the end of the chain.
*
* @param request the servlet request
* @param response the servlet response
* @since Servlet 2.3
*/
@Override
public void doFilter(ServletRequest request,
ServletResponse response)
throws ServletException, IOException
{
Thread thread = Thread.currentThread();
ClassLoader oldLoader = thread.getContextClassLoader();
try {
thread.setContextClassLoader(_classLoader);
_next.doFilter(request, response);
} catch (ServletException e) {
if (_errorPageManager != null)
_errorPageManager.sendServletError(e, request, response);
else
throw e;
} catch (IOException e) {
if (_errorPageManager != null)
_errorPageManager.sendServletError(e, request, response);
else
throw e;
} catch (RuntimeException e) {
if (_errorPageManager != null)
_errorPageManager.sendServletError(e, request, response);
else
throw e;
} finally {
// needed for things like closing the session
if (request instanceof AbstractHttpRequest)
((AbstractHttpRequest) request).finishInvocation();
if (_tm != null) {
try {
TransactionImpl transaction = _tm.getCurrent();
if (transaction.getStatus() != Status.STATUS_NO_TRANSACTION) {
log.warning("Transaction not properly closed for " + ((HttpServletRequest) request).getRequestURL());
}
transaction.close();
} catch (Throwable e) {
log.log(Level.WARNING, e.getMessage(), e);
}
}
if (response instanceof AbstractHttpResponse)
((AbstractHttpResponse) response).finishInvocation();
thread.setContextClassLoader(oldLoader);
}
}
public String toString()
{
return getClass().getSimpleName() + "[" + _next + "]";
}
}