[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1430) Improve Function feature

Wed Mar 12 00:14:57 EDT 2008

    [ http://jira.jboss.com/jira/browse/JBRULES-1430?page=comments#action_12402333 ] 

Mark Proctor commented on JBRULES-1430:
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If you can provide a patch we'll consider it. However this requires text mangling, which is hard to do and as users can just pass the workingmemory themselves it's low on our priority.

By this I mean in the consequence how do you detect a function call and how do you mangle the text to insert the workingmemory parameter at the end. This isn't something that can be done simply with some regular expression.

> Improve Function feature
> ------------------------
>
>                 Key: JBRULES-1430
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1430
>             Project: JBoss Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: All
>    Affects Versions: 4.0.4
>         Environment: all
>            Reporter: longDuck dong
>            Priority: Minor
>
> The current design of the Function is a bit limiting. for example, if I want to write a function to insert, update or retract facts, the current design does not support it. According to the docs http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html/ch06s04.html, functions are just helper methods. It would be more powerful if the function always passes the workingmemory to the function. This way, the functions can easily access the globals or access the rule engine. Basically, something similar to JESS funcall http://herzberg.ca.sandia.gov/docs/70/api/jess/Funcall.html.
> It also makes it easier for developers to encapsulate common actions in the consequence in a function and use it easily from a DSL. The pattern is well proven in CLIPS, JESS and haley.

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