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Aaron B. wrote:
So how does that architecture work for an Internet app where there are
going
to be thousands of users? I guess that is where I was going with the
idea
of doing threads on the RPG side.
Threading doesn't apply under that architecture. The J2EE application
server is running in one job, and the RPG program is in another, and
they communicate over a socket. It's similar to the CGI interface
running under a named activation group. It wouldn't make sense to add
RPG code for serialized access. Job startup costs occur only once, when
the connection is first established.
Contrast that architecture with the one where an HTTP Server thread
calls an RPG procedure and all the code is running within a single
process. I ran into this when I wrote an HTTP server plug-in. In that
case you might need to add code to the RPG module to serialize access,
because multiple HTTP server threads are calling the same RPG procedure
concurrently.
Nathan.
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