[jboss-jira] [JBoss JIRA] (DROOLS-1021) Allow to retrieve the KieBase and KieSession models from the KieContainer

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco updated DROOLS-1021:
--------------------------------
    Summary: Allow to retrieve the KieBase and KieSession models from the KieContainer  (was: Add method on KieContainer to get the KieBase for an ksessionName (without instantiating the KieSession))


> Allow to retrieve the KieBase and KieSession models from the KieContainer
> -------------------------------------------------------------------------
>
>                 Key: DROOLS-1021
>                 URL: https://issues.jboss.org/browse/DROOLS-1021
>             Project: Drools
>          Issue Type: Enhancement
>          Components: core engine
>    Affects Versions: 6.3.0.Final
>            Reporter: Geoffrey De Smet
>            Assignee: Mario Fusco
>
> OptaPlanner is switching from using KieBase (with a drl classpath resource to retrieve the rules) to KContainer (with ksessionName to retrieve the rules), so it can function as part of a kjar.
> During bootstrap, it needs to check the rules if a specific Global is defined.
> Currently *it needs to instantiate a throwaway KieSession* to do that which is bad:
> {code}
>         KieSession kieSession = kieContainer.newKieSession(ksessionName); // BAD
>         KieBase kieBase = kieSession.getKieBase();
>         checkIfGlobalScoreHolderExists(kieBase);
> {code}
> It would be much nicer if we could do this instead:
> {code}
>         KieBase kieBase = kieContainer.getKieBaseForKsessionName(ksessionName);
>         checkIfGlobalScoreHolderExists(kieBase);
> {code}
> So the proposal is to add that new method  kieContainer.getKieBaseForKsessionName(String ksessionName)
> For the record, here's that check method that's being called at bootstrap:
> {code}
>     protected void checkIfGlobalScoreHolderExists(KieBase kieBase) {
>         boolean hasGlobalScoreHolder = false;
>         for (KiePackage kiePackage : kieBase.getKiePackages()) {
>             for (Global global : kiePackage.getGlobalVariables()) {
>                 if (DroolsScoreDirector.GLOBAL_SCORE_HOLDER_KEY.equals(global.getName())) {
>                     hasGlobalScoreHolder = true;
>                     break;
>                 }
>             }
>         }
>         if (!hasGlobalScoreHolder) {
>             throw new IllegalArgumentException("The kieBase with kiePackages (" + kieBase.getKiePackages()
>                     + ") has no global field called " + DroolsScoreDirector.GLOBAL_SCORE_HOLDER_KEY + ".\n"
>                     + "Check if the rule files are found and if the global field is spelled correctly.");
>         }
>     }
> {code}



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