to the Web with Gen – EDGE EMEA 2007
Kale Consultants presented a case study of a recent migration (seems to be a recurring theme!) – this time, a migration to the web using Gen 7.0.
The system in question is CBD-based , with some 30 models comprising approximately 37 million objects.
The target was to get “to the web”, and various approaches were considered, including rewrites, but as so often occurs in Gen environments, a total Gen solution was chosen, deploying to EJBs.
Technology and paradigm changes mean that Gen interfaces need to change – such as:
- Security issues
- Non-supported events
- C EABs to JAVA EABs
- Replacement of Active/X and OLE controls
Many issues in changing technology bring other, less obvious challenges, as are mentioned in other posts, for example database behaviour changes and functionality being different in different releases of the product and platform.
Of particular interest in this presentaton was a discussion of deployent platforms and issues with those platforms. On one application server, such as Weblogic, there will be one set of performance and deployment issues, and on other platforms, such as WebSphere, there will be others,but the choice of deployment platform can change the course, and ultimately the success or failure of a project. Kale Consulting showed that by proper and effective performance testing and deployment tuning, the project can be implemented with a deployment mechanism which will be effective.
Consideration has to be given to the target infrastructure and architecture BEFORE selection of the re-engineering mechansim ?
Yes ? No ? – neither !
They should be done in tandem and be prepared to change half way through when the first choice seems not to be correct.
