/*
* $Header: /home/cvs/jakarta-tomcat-catalina/modules/cluster/src/share/org/apache/catalina/cluster/tcp/ReplicationValve.java,v 1.1 2003/02/19 20:32:11 fhanik Exp $
* $Revision: 1.1 $
* $Date: 2003/02/19 20:32:11 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
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* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
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* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
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* Foundation" must not be used to endorse or promote products derived
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package org.apache.catalina.cluster.tcp;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Container;
import org.apache.catalina.HttpRequest;
import org.apache.catalina.HttpResponse;
import org.apache.catalina.Logger;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Valve;
import org.apache.catalina.ValveContext;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.valves.*;
import org.apache.catalina.cluster.session.SimpleTcpReplicationManager;
import org.apache.catalina.cluster.session.SessionMessage;
import org.apache.catalina.cluster.tcp.SimpleTcpCluster;
/**
* <p>Implementation of a Valve that logs interesting contents from the
* specified Request (before processing) and the corresponding Response
* (after processing). It is especially useful in debugging problems
* related to headers and cookies.</p>
*
* <p>This Valve may be attached to any Container, depending on the granularity
* of the logging you wish to perform.</p>
*
* @author Craig R. McClanahan
* @version $Revision: 1.1 $ $Date: 2003/02/19 20:32:11 $
*/
public class ReplicationValve
extends ValveBase {
// ----------------------------------------------------- Instance Variables
/**
* The descriptive information related to this implementation.
*/
private static final String info =
"org.apache.catalina.cluster.tcp.ReplicationValve/1.0";
/**
* The StringManager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
/**
* holds file endings to not call for like images and others
*/
protected java.util.regex.Pattern[] reqFilters = new java.util.regex.Pattern[0];
protected int debug = 0;
// ------------------------------------------------------------- Properties
public ReplicationValve() {
}
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
// --------------------------------------------------------- Public Methods
/**
* Log the interesting request parameters, invoke the next Valve in the
* sequence, and log the interesting response parameters.
*
* @param request The servlet request to be processed
* @param response The servlet response to be created
* @param context The valve context used to invoke the next valve
* in the current processing pipeline
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void invoke(Request request, Response response,
ValveContext context)
throws IOException, ServletException
{
//this happens before the request
context.invokeNext(request, response);
//this happens after the request
try
{
HttpRequest hrequest = (HttpRequest) request;
HttpServletRequest hreq = (HttpServletRequest) hrequest.getRequest();
HttpSession session = hreq.getSession(false);
String id = null;
if ( session != null )
id = session.getId();
else
return;
if ( id == null )
return;
if ( (request.getContext().getManager()==null) ||
(!(request.getContext().getManager() instanceof SimpleTcpReplicationManager)))
return;
String uri = hrequest.getDecodedRequestURI();
boolean filterfound = false;
for ( int i=0; (i<reqFilters.length) && (!filterfound); i++ )
{
java.util.regex.Matcher matcher = reqFilters[i].matcher(uri);
filterfound = matcher.matches();
}//for
if ( filterfound )
return;
if ( debug > 4 ) log("Invoking replication request on "+uri,4);
SimpleTcpReplicationManager manager = (SimpleTcpReplicationManager)request.getContext().getManager();
SessionMessage msg = manager.requestCompleted(id);
if ( msg == null ) return;
SimpleTcpCluster cluster = (SimpleTcpCluster)getContainer().getCluster();
if ( cluster == null ) {
log("No cluster configured for this request.",2);
return;
}
cluster.send(msg);
}catch (Exception x)
{
log("Unable to perform replication request.",x,2);
}
}
/**
* Return a String rendering of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("RequestDumperValve[");
if (container != null)
sb.append(container.getName());
sb.append("]");
return (sb.toString());
}
public void setFilter(String filter)
{
log("Loading request filters="+filter,3);
java.util.StringTokenizer t = new java.util.StringTokenizer(filter,";");
this.reqFilters = new java.util.regex.Pattern[t.countTokens()];
int i = 0;
while ( t.hasMoreTokens() )
{
String s = t.nextToken();
log("Request filter="+s,3);
try
{
reqFilters[i++] = java.util.regex.Pattern.compile(s);
}catch ( Exception x )
{
log("Unable to compile filter "+s,x,3);
}
}
}
public void setDebug(int debug)
{
this.debug = debug;
}
// ------------------------------------------------------ Protected Methods
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
*/
protected void log(String message,int level) {
if ( debug < level ) return;
Logger logger = null;
if ( container != null ) logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message);
else
System.out.println(this.toString() + ": " + message);
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
* @param throwable Associated exception
*/
protected void log(String message, Throwable throwable,int level) {
if ( debug < level ) return;
Logger logger = null;
if ( container != null ) logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message, throwable);
else {
System.out.println(this.toString() + ": " + message);
throwable.printStackTrace(System.out);
}
}
}