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Figure 108 depicts the functional flow of a
typical DACS service provider. The exact nature of a provider depends
on the specific application, but the overall structure is the same for
all providers.
Figure 108:
Functional flow diagram of a typical DACS service provider.
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When the service is instantiated, it initializes itself and
establishes itself as a TCP/IP server. Upon proper contact from the
client, q2q, the program enters a loop, waiting for commands
from the client and servicing requests. This loop continues until the
client drops the connection. When the connection is dropped, service
providers should return to the state in which they wait for a
connection from a client. All running functions should stop and
return to a default state if this happens.
Steve Richardson
2000-07-06
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