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2.4. USE CASES 7<br />
Figure 2.3: Use Case Diagram<br />
ˆ SQL7 database<br />
ˆ remote gateway interface<br />
included use case:<br />
ˆ update measurement transfer status table<br />
ˆ log system information<br />
pre-conditions: none<br />
basic flow of events:<br />
The data manager wants to send a test result message to the remote gateway interface. The<br />
data manager has to query the SQL7 database for unsent test results, generate an HL7 message<br />
embedded in XML and establish a socket connection to the remote gateway interface.<br />
After sending the message, the data manager waits for a configurable period of time to receive an<br />
acknowledgement message from the remote gateway interface during the same socket connection.<br />
After successfully receiving the acknowledgement message, type and timestamp of this message<br />
are logged in the measurement status transfer database table and the socket connection will be<br />
closed.<br />
post-conditions: none<br />
alternatives: none
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