/*
* 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 Sam
*/
package com.caucho.tools.profiler;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Creates a {@link ProfilerPoint} for each invocation of {@link #doFilter}.
*/
public class ProfilerFilter
implements Filter
{
private static final L10N L = new L10N(ProfilerFilter.class);
private static final Logger log
= Logger.getLogger(ProfilerFilter.class.getName());
// can do this because an instance of Filter is created for each environment
private final ProfilerManager _profilerManager = ProfilerManager.getLocal();
private boolean _isUseQuery = false;
public ProfilerFilter()
{
}
/**
* If true, use the query portion of the url to distinguish requests, default
* is false.
*/
public void setUseQuery(boolean useQuery)
{
_isUseQuery = useQuery;
}
public boolean isUseQuery()
{
return _isUseQuery;
}
public void init(FilterConfig filterConfig)
throws ServletException
{
}
public void doFilter(ServletRequest servletRequest,
ServletResponse servletResponse,
FilterChain chain)
throws ServletException, IOException
{
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
String uri = request.getRequestURI();
String servletPath = (String) request.getAttribute(
RequestDispatcher.INCLUDE_SERVLET_PATH);
String pathInfo;
String queryString;
if (servletPath == null) {
servletPath = request.getServletPath();
pathInfo = request.getPathInfo();
if (isUseQuery())
queryString = request.getQueryString();
else
queryString = null;
}
else {
pathInfo
= (String) request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO);
if (isUseQuery())
queryString = (String) request.getAttribute(
RequestDispatcher.INCLUDE_QUERY_STRING);
else
queryString = null;
}
String name;
if (pathInfo == null && queryString == null)
name = servletPath;
else {
CharBuffer nameBuilder = new CharBuffer();
nameBuilder.append(servletPath);
if (pathInfo != null)
nameBuilder.append(pathInfo);
if (queryString != null) {
nameBuilder.append('?');
nameBuilder.append(queryString);
}
name = nameBuilder.toString();
}
ProfilerPoint profilerPoint = _profilerManager.getProfilerPoint(name);
if (log.isLoggable(Level.FINEST))
log.finest(profilerPoint.toString());
Profiler profiler = profilerPoint.start();
try {
chain.doFilter(request, response);
}
finally {
profiler.finish();
}
}
public void destroy()
{
}
}