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

[Geoffrey De Smet (JIRA)]

Support real-time problem modification during solving with utils for the single thread subsystem
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                 Key: JBRULES-680
                 URL: http://jira.jboss.com/jira/browse/JBRULES-680
             Project: JBoss Rules
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: Solver
            Reporter: Geoffrey De Smet
         Assigned To: Geoffrey De Smet


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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