org.apache.catalina

Interface ValveContext

Known Implementing Classes:
StandardValveContext

public interface ValveContext

A ValveContext is the mechanism by which a Valve can trigger the execution of the next Valve in a Pipeline, without having to know anything about the internal implementation mechanisms. An instance of a class implementing this interface is passed as a parameter to the Valve.invoke() method of each executed Valve.

IMPLEMENTATION NOTE: It is up to the implementation of ValveContext to ensure that simultaneous requests being processed (by separate threads) through the same Pipeline do not interfere with each other's flow of control.

Version:
$Revision: 1.2 $ $Date: 2004/02/27 14:58:39 $

Authors:
Craig R. McClanahan
Gunnar Rjnning
Peter Donald

Method Summary

String
getInfo()
Return descriptive information about this ValveContext implementation.
void
invokeNext(Request request, Response response)
Cause the invoke() method of the next Valve that is part of the Pipeline currently being processed (if any) to be executed, passing on the specified request and response objects plus this ValveContext instance.

Method Details

getInfo

public String getInfo()
Return descriptive information about this ValveContext implementation.


invokeNext

public void invokeNext(Request request,
                       Response response)
            throws IOException,
                   ServletException
Cause the invoke() method of the next Valve that is part of the Pipeline currently being processed (if any) to be executed, passing on the specified request and response objects plus this ValveContext instance. Exceptions thrown by a subsequently executed Valve (or a Filter or Servlet at the application level) will be passed on to our caller. If there are no more Valves to be executed, an appropriate ServletException will be thrown by this ValveContext.

Parameters:
request - The request currently being processed
response - The response currently being created


Copyright B) 2000-2003 Apache Software Foundation. All Rights Reserved.