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How to get org.apache.catalina.connector.Request object in Tomcat?

I need to write a Servlet or Filter class that can access the org.apache.catalina.connector.Request object, which is wrapped in the RequestFacade object specified for my servlet. Casting does not work because RequestFacade is not a subclass of Request.

I need this because I'm trying to call the setRequestedSessionId () Request method, and this does not seem to be part of the Http servlet specification. The reason I need to do this is because the session identifier is included in the URL under a different name than JSESSIONID. I cannot change the URL or parameter name, so I am trying to associate the request with the correct session by retrieving the session ID and calling Request.setRequestedSessionId ().

I really solved the problem using the Valve subclass, but I don't like using Valve because, as far as I can tell, I need to install the Valve subclass in the Tomcat / server / classes directory instead of packing it with the rest of my webapp. If there was a portable way to do this in different servlet containers, that would be great, but for now, I have come to terms with making this Tomcat-specific.

Here is the valve code:

public class SessionSetter extends ValveBase {
public void invoke( Request request, Response response ) throws IOException, ServletException {
    String sessionId = request.getParameter( "whatever" );
    request.setRequestedSessionId( sessionId );
}

}

Is there a way to do the same in a servlet or in a filter? Or is there some way to package the Valve class in my .war application file?

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2 answers

(this is my comment updated to the answer)

Tomcat 5.5 6, , : http://tomcat.apache.org/tomcat-6.0-doc/config/systemprops.html#Sessions. , , . Tomcat 7, , ( , , tc7, ).

Tomcat webapp ( ), , . , - , RequestFacade , , webapp Tomcat.

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Tomcat RequestFacade, ( JSP) :

import java.lang.reflect.Field;
import org.apache.catalina.connector.Request;

...

Field f = request.getClass().getDeclaredField("request");
f.setAccessible(true); // grant access to (protected) field
Request realRequest = (Request)f.get(request);
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