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From: gslt@gslweb.de
To: <users@tomcat.apache.org>
Subject: Re: Servlet inter-communication
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Date: Wed, 03 May 2006 14:15:42 +0200

>> From: Samuli Elomaa [mailto:samuli.elomaa@pp.inet.fi] 
>> Is there any otherway for two servlets in same tomcat to communicate  
>> together except by http requests? Eg. could two servlets use 
>> somekind of shared memory? or send signals to each other?
>
>Both could in theory rendezvous at a common filename.  However, it may
>be easier to put a singleton class in shared/lib.  

I think the standard way would be to use a a session bean,
if the communication is limited to a session, or an 
application bean if not. This is sort of shared memory, but
beware of concurrent access and synchronise. Both ways work 
only if the servlets are in the same webapp. I would refrain 
from using files in any case.

If the servlets are not in the same webapp, then IMHO
the only clean way is HTTP.

Georg

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