Tandem COBOL to Java / C# Migration

See Tandem COBOL to Java case study

Famous for their fault tolerant system, Tandem / Tandem Non-Stop dialect of COBOL is fairly close to ANSI COBOL 74/85 Standards.
The main differences are the extensions to COBOL language, screen definitions and database API. SoftwareMining has experience with migration of several Tandem applications, and can migrate this dialect of COBOL to either Java or C#.

Tandem Screen Definition

Tandem Screens definitions are typically defined in external files. Tandem 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.

Julian Date/Time handling

Tandom provides specific Date Time handling routines which deal with Julian Date format. E.g

   ENTER TAL "JULIANTIMESTAMP"
   ENTER TAL "CONVERTTIMESTAMP"
   ENTER TAL "INTERPRETTIMESTAMP"

For performance reasons these are best translated to Java/C# default date-time handling.

Embedded SQL

Embedded SQL can be used for access to databases. The SQL embedded within the programs can be externalized - to ease future migration between datebases.

Tandem COBOL to Java/C# Migration Project Phases

The Migration of COBOL applications to Java or C# involves:

Asset Management: Identify all the artefacts required for translation .
Translate to target language
Database and Data Migration
Migrate JCL
Create and Populate of Test Database
System acceptance testing
User Acceptance Testing
(Optional): Other Improvements: Screen Redesign, SOA Integration, Cloud Deployments, Coding Improvements and clean up

Comparing COBOL to translated code

Comparison of Converted code: COBOL to Java
Comparison of Converted code: COBOL to C#
COBOL to Java / C# Conversion Tool - Download Trial (Release 2021-05-21)

Related White Papers

Managing COBOL to Java / C# Conversion Projects
Gradual migration of COBOL applications to Java: one piece at a time - reducing costs and risks.

Tandem Migration, Modernization and Re-hosting References

Tandem

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