topic Re: Singleton Class in Application Development and Automation Discussions

Singleton Class

Former Member — Fri, 20 Nov 2009 11:36:13 GMT

Hi all,

Any body please provide me information on singleton class and how can we created them in ABAP.

Thanks.

Anil.

Re: Singleton Class

Sm1tje — Fri, 20 Nov 2009 12:28:34 GMT

A singleton class is a class that cannot be instantiated more than once (in a single program that is). Of course you can do the same in other programs without facing any problems. You can do this by setting the flag final and create the class as private. Now the class can only be instantiated in one of its own methods.

I can't really think of a real life example in which you want to make sure that a class is only instantiated once.

Re: Singleton Class

Clemenss — Fri, 20 Nov 2009 12:33:54 GMT

Hi Anil,

is this an exam question? (looks like...)

[singleton class and how can we created them in ABAP|http://www.google.es/#hl=en&source=hp&q=singletonclassandhowcanwecreatedtheminABAP&btnG=GoogleSearch&aq=f&oq=singletonclassandhowcanwecreatedthemin+ABAP&fp=1&cad=b]

Regards,

Clemens

Re: Singleton Class

Former Member — Fri, 20 Nov 2009 12:39:05 GMT

I have a real life example. If getting married is your objective (Class), better it gets instatiated only once. Else it could land you in a lot of trouble

Re: Singleton Class

Former Member — Fri, 20 Nov 2009 15:25:02 GMT

Hi,

See following blog. It has all details about singlton.

http://help-abap.blogspot.com/2008/09/abap-object-design-patterns-singleton.html

rgds,