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OO COBOL Application Development
Danny Maijer
Kees Tieleman
Sogeti Netherlands
World Trade Centre, Amsterdam
20 April 2006
Agenda
• Benefits of OO COBOL in .Net
• Learning curve OO COBOL in .Net
• Application Development
Framework (ADF)
• Personal experience with ADF
> By Kees Tieleman
Benefits of OO Cobol in .Net
• No need to transform COBOL to
another programming language
• All business logic remains intact
• OO concepts can be adopted easily
• Programming languages can be
mixed
Learning curve to .Net
COBOL
Java
C++
VB.Net
0
3
6
9
12
Months
Academic
Source: Gartner (nov. 2005)
Productive
Proficient
15
18
A mainframe developer in .Net
Feels like an Englishman in New York
ADF makes life easy
Developers write familiar COBOL code
COBOL
business
logic
ADF
GUI
ADF provides the GUI mechanism
utilizing the .Net classes
Usage of ADF
• Migration of existing applications
(Mikado™)
• Extending migrated applications
• Building new applications
Benefits of ADF
•
•
•
•
Consistent GUI
Fast application development
Simplified maintenance
Concentrate on business rules, not
technology
• No need to (re)train current staff
intensively
Hands-on experience
Kees Tieleman
Learning curve OO COBOL in .Net
COBOL
Java
C++
VB.Net
0
3
6
9
12
Months
Academic
Source: Gartner (nov. 2005)
Productive
Proficient
15
18
Learning curve using ADF
Visual Studio 2005 IDE
Learning curve using ADF
Visual Studio 2005 IDE
Some OO Cobol
2 days
Some OO Cobol additions
• OO Cobol equivalent of MOVE for
objects:
set Boek-ISBN
to self::"textISBN"::"Text"
• OO Cobol equivalent of CALL for
sending messages:
invoke Error-Control::"SetError"(self::"textISBN",
"ISBN has to be entered.")
Learning curve using ADF
Visual Studio 2005 IDE
2 days
Some OO Cobol
1 day
Application Development Framework
A simple maintenance form
ADF: example
• Validate
********************************************************************
set ReturnValue
to true
method-id. ValidateRecord as "ValidateRecord" override public.
********************************************************************
linkage
section.
if
Boek-Title
= spaces
01 ReturnValue object reference class-boolean.
set ReturnValue
to false
procedure
division returning ReturnValue.
*> invoke
Validate data
values. return True or False.
Error-Control::"SetError"(self::"textTitle",
set ReturnValue
to true
"Title has to be entered.")
elseif Boek-Title = spaces
set ReturnValue
to false
invoke
Error-Control::"SetError"(self::"textTitel",
invoke Error-Control::"SetError"(self::"textTitle",
"")
"Title has to be entered.")
else
end-if
invoke Error-Control::"SetError"(self::"textTitel", "")
. end-if
.
end method ValidateRecord.
Learning curve using ADF
Visual Studio 2005 IDE
2 days
Some OO Cobol
1 day
Application Development Framework 2 days
+
Grand total
5 days
Learning curve OO COBOL in .Net
COBOL
Java
C++
VB.Net
0
3
6
9
12
Months
Academic
Source: Gartner (nov. 2005)
Productive
Proficient
15
18
Summary
• OO COBOL in .Net
> many advantages
> one significant disadvantage
• ADF
> eliminates long learning curve
> enables you to retain current staff
> bridges the gap between your application
and .Net
With help of the ADF
Visit the Sogeti stand for more
information about the ADF and a demo
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