Calling into Servlet Container without HTTP

[Kelly Chen <ke...@tumbleweed.com>]

Hi, there:

I am looking for a way to invoke a Servlet without going through HTTP. I 
understand that this has to be container specific logic, so I would like 
to do this on Tomcat 4.1.18.

The idea is to use JSP as a template system, but JSP has be to run 
inside a Servlet Container. So I would like to be able to invoke JSP 
through Tomcat and get result directly without going through HTTP.

I just wonder if anyone has attempt the similar task  or has some points 
to share.

Thanks.

-- 
Kelly Chen                       Tumbleweed Communication Corp.
T:650-216-2043                   700 Saginaw Drive
F:650-216-2565                   Redwood City, CA 94063





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Re: Calling into Servlet Container without HTTP

[Remy Maucherat <re...@apache.org>]

Kelly Chen wrote:
> Hi, there:
> 
> I am looking for a way to invoke a Servlet without going through HTTP. I 
> understand that this has to be container specific logic, so I would like 
> to do this on Tomcat 4.1.18.
> 
> The idea is to use JSP as a template system, but JSP has be to run 
> inside a Servlet Container. So I would like to be able to invoke JSP 
> through Tomcat and get result directly without going through HTTP.
> 
> I just wonder if anyone has attempt the similar task  or has some points 
> to share.

I don't see that much benefit in avoiding HTTP, as there's a lot of code 
there already, and the code is fast. What should be avoided are the 
socket operations, which are expensive.

If you take a look at Coyote, you could write a new protocol handler 
which would read/write HTTP stuff in memory, while reusing the 
Http11Processor class.

Alternately, you can create a brand new protocol handler. That would be 
the most efficient, and it's not that hard. You can use the JK and 
HTTP/1.1 handlers as examples (but no, there are no docs right now).

Remy



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