COBOL Software Modernization by Franck Barbier, Jean-Luc Recoussine

By Franck Barbier, Jean-Luc Recoussine

These days, billions of traces of code are within the COBOL programming language. This publication is an research, a prognosis, a technique, a MDD technique and a device to remodel legacy COBOL into modernized purposes that conform to web computing, Service-Oriented structure (SOA) and the Cloud. It serves as a blueprint for these in command of discovering options to this substantial problem.

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Currency’ program call: EXEC CICS LINK PROGRAM(‘Currency’). info Software Modernization: Technical Environment 29 From the code perspective, these COBOL lines are a statement suite. From the architectural viewpoint, this is a (calling) link to a packaged program named Currency. e. the business logic has two calculation precision rules: 1 or 2 digits. Unfortunately, we have to be aware that the structuring level of average COBOL programs is significantly lower, compared to the code above. This results in duplicated business functions and rules, whose codification is not uniform at all.

See also Chapter 1). This cultural rupture is a strong means of integrating mechanical/electronic/software components in order to differentiate a car product line from competitors. Car SOA is then the idea of easily pluggable services: park assistance, car-to-car communication, etc. The latter component is a palpable incarnation of the link to Internet computing. 4. 1. Re-engineering in action Nowadays, reverse and forward engineering have a consensus in terms of both definition and practice. To that extent, there exists a plethora of re-engineering methods and tools.

Later on, replacement includes an overlap phase where the old and the new (completed) system run, for comparison purposes, in parallel. The latter must be as functional and robust as the old one. There is a risk of degraded service. For business-critical applications like billing, this may correspond to non-encashment or litigation costs on bills, a nightmare for a company. This remark encompasses the vivid need of carrying out the full testing of the new system with respect to the old one. info Software Modernization: Technical Environment 25 functionalities, even the same quality of service.

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