[jboss-jira] [JBoss JIRA] (JBRULES-680) Support real-time problem modification during solving with utils for the single thread subsystem

[Geoffrey De Smet (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet resolved JBRULES-680.
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    Fix Version/s: 5.3.0.Final
       Resolution: Done


Fixed a long time ago, as part of real-time planning.
                
> Support real-time problem modification during solving with utils for the single thread subsystem
> ------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-680
>                 URL: https://issues.jboss.org/browse/JBRULES-680
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: drools-planner
>            Reporter: Geoffrey De Smet
>            Assignee: Geoffrey De Smet
>            Priority: Optional
>             Fix For: 5.3.0.Final
>
>
> Rete/Drools is single threaded, and so is the current implementation of the localsearchsolver,
> but this single thread subsystem should be documented
> and utils should be provided to allow for real-time problem modification
> A simple way would be to use a producer-consumer pattern with a non blocking queue which holds "problem moves".
> Each step the problem moves could be used.
> Problems:
> - bestsolutionrecalled also needs it's score adjusted. so we'll need a 2th working memory:
> -- EITHER temporary, just for the problem move (or set of problem moves)
> -- EITHER all the time, but then we'd have to hold a chain of moves, some of which might not be doable at the end
> - cached selectors must be notified of refreshing their cache
> - solution cloning normally doesn't clone the problem facts, just the proposed solution references. Do we need a full clone now?

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