This implementation of this scenario can be considered as two sets of application services that need to be loosely connected:
The Web middleware includes the Web server and the associate business logic to handle interactive requests from employees. Associated with this building block is a local MSMQ outgoing queue where messages destined for the SAP system are stored until the messages are successfully delivered. In our scenario, all of the Web middleware services could be implemented on a single Windows 2000 server system.
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