Valve (Catalina Internal API Documentation)
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A Valve is a request processing component associated with a
particular Container. A series of Valves are generally associated with
each other into a Pipeline. The detailed contract for a Valve is included
in the description of the invoke()
method below.
Method Summary | |
java.lang.String |
getInfo()
Return descriptive information about this Valve implementation. |
void |
invoke(Request request,
Response response,
ValveContext context)
Perform request processing as required by this Valve. |
Method Detail |
public java.lang.String getInfo()
public void invoke(Request request, Response response, ValveContext context) throws java.io.IOException, javax.servlet.ServletException
Perform request processing as required by this Valve.
An individual Valve MAY perform the following actions, in the specified order:
context.invokeNext()
.
A Valve MUST NOT do any of the following things:
invokeNext()
method has returned.
invokeNext()
method has
returned.
request
- The servlet request to be processedresponse
- The servlet response to be createdcontext
- The valve context used to invoke the next valve
in the current processing pipeline
java.io.IOException
- if an input/output error occurs, or is thrown
by a subsequently invoked Valve, Filter, or Servlet
javax.servlet.ServletException
- if a servlet error occurs, or is thrown
by a subsequently invoked Valve, Filter, or Servlet
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