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

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?