[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2700) Allow setting a global variable (for example a service) which can be used by the score rules

[Geoffrey De Smet (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-2700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12617610#comment-12617610 ] 

Geoffrey De Smet commented on JBRULES-2700:
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One resolution would be the ability to hook in a WorkingMemoryPreperator, which is a class that would be run every time a new memory is created. The problem is you 'll probably want to be able to fetch those constants from some service that you need to inject in that Preperator, which would be hard...

I am not yet convinced that simply putting some InstitutionWeightings instance like in Examination example doesn't suffice :/

> Allow setting a global variable (for example a service) which can be used by the score rules
> --------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-2700
>                 URL: https://issues.jboss.org/browse/JBRULES-2700
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: drools-planner
>            Reporter: Wouter Horré
>            Assignee: Geoffrey De Smet
>
> Currently, it is not possible to set a global variable in the working memory used by the solver. If a scoring rule needs an external helper for calculating scores (e.g. a dependency injected with OSGi DS), a workaround using a static variable in some class accessible by the scoring rules is needed.
> The easiest implementation is probably a new method in the Solver interface:
> public WorkingMemory getWorkingMemory();
> which provides access to the working memory used by the solver.

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