System Design
Rather than designing an entire system, we are actually designing a data pipeline that will permit information to flow to and from the existing legacy COBOL applications. Figure 17.1 shows the flow of information between the Internet ordering system and the legacy mainframe applications.
Figure 17.1. The Internet/legacy order processing data flow.
Based on this data flow, these are the items that need to be designed and developed:
The daily order XML to flat-file conversion process.
The mainframe inventory XML export process.
Also, because there is no real “mainframe” in our scenario, we will develop utilities to simulate the actions ...
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