VAX COBOL Migration
VAX dialect of COBOL is fairly close to ANSI COBOL 74/85 Standards.
The main differences is the extensions to COBOL language, Screens definitions, use of DBMS32 (Codasyl) Database and API.
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VAX DBMS32 Database Migration
VAX COBOL programs typically utilise DBMS32 database system and API. DBMS32 is a CODASYL designs, which support Master-Child type relationships.
SoftwareMining Translation Toolkit can use the exported DBMS32 schemas to regenerate the database as a Relational Database. The Master-Child relationships are translated to "foreign-key" relationships. The system will also generate Object-Relational data access classes for each of the tables. These classes will continue to represent the Master-Child relationships as associations in Object-Oriented classes.
The following diagram outlines the artifacts genrated from translation of DBMS32 tables
Click here for further information on DBMS32 and CODASYL database design.
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VAX Screens Definition
VAX Screens definitions are typically defined in external files. VAX COBOL screens tend to be used within Conversational programs, designed for a "client-server" type deployment. SoftwareMining converts such Conversational applications to a Application-Server architecture.
The screen definitions are tranlated to XML/XSLT architecture which works with an Web-Server, to produce HTML screens at run-time. Although in HTML, The translated screens would still have a "green-screen" look and feel. As a part of an application modernization project, many sites redesign the screens to benefit from a new look and feel.
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VAX DBMS32 COBOL Migration, Modernization and Rehosting Project Phases
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The translation of to Java or C# applications involve
- Asset Management: Identify all the artifacts required for translation .
- (Optional) Business Rule Extraction.
- Translate to target language
- Database and Data Migratation
- Migrate JCL / WFL / CL
- Creation and Population of Test Database
- System acceptance testing
- System acceptance testing
- User Acceptance Testing
- (Client): Interation 2 Improvements: Screen Redesign, SOA Integration, Cloud Deployments, Coding Improvements and cleanup
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VAX DBMS32 Migration, Modernization and Re-hosting References
VAX
CODASYL Database designs
SoftwareMining on Wikipedia
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