In a server system: an information holding unit holds information on one of
a plurality of processing units which should execute processing in
response to each of a plurality of types of processing requests; a
processing-request receiving unit receives a processing request; a
determining unit determines one of the plurality of processing units as a
processing unit which should execute the received processing request,
based on the information held by the information holding unit; and a
calling unit calls the determined one of the plurality of processing units
so that the one of the plurality of processing units executes the received
processing request.
