IBM E02HMLL-I Implementation Guide - Page 16
InterChange, Server, Express, implementation
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performs its processes on the business object and responds, and that response is transformed back into the specific data format that was used at the beginning of the process. To accept calls from external processes and send the calls as business objects to a collaboration, the Server Access Interface requires the following: v A web server that uses a servlet or other process to send data to the Server Access Interface. The data must be in a MIME type for which data handlers have been configured in the InterChange Server Express. The servlet uses the Server Access Interface to call a data handler that converts the data into a business object format, and then uses the Server Access Interface to send the business object as a call into a collaboration. v A collaboration that has been configured to handle requests that are received as calls through the Server Access Interface. In the example shown in Figure 2,, at a site that has not implemented either the IBM WebSphere Business Integration Server Express system or a connector, a customer representative uses a web browser to obtain the status of a purchase order over the Internet from an ERP application (SAP in the example) that resides at a site that has implemented the IBM WebSphere Business Integration Server Express system. To enable this, the IBM WebSphere Business Integration Server Express uses the Server Access Interface, together with a collaboration (hypothetical in this example) for purchase-order business logic, an SAP connector, and definitions of business objects that represent purchase-order status information. Collaboration Server Access Interface SAP Connector START Servlet Web Server Browser SAP Application POstatus data POstatus Business Object Figure 2. Execution of a call through the Server Access Interface Data flow in an InterChange Server Express implementation A data flow is initiated by either of two types of interactions: publish-andsubscribe interactions or service call interactions. Both types of interaction supply triggers that start the execution of a collaboration's business processes. The collaboration then uses a third type of interaction-request/response -to complete the exchange of data with the intended destination. 4 IBM WebSphere Business Integration Server Express and Express Plus: System Implementation Guide
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