[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2554) Adding a StatefulKnowledgeSessionAware Interface

[Anatoly Polinsky (JIRA)]

    [ https://jira.jboss.org/browse/JBRULES-2554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12536734#action_12536734 ] 

Anatoly Polinsky commented on JBRULES-2554:
-------------------------------------------

This can be used by developers implementing custom behavior, but one frequent usage for this is when registering WorkItemHandler
{code}
	if ( wih instanceof StatefulKnowledgeSessionAware ) {
		(  (  StatefulKnowledgeSessionAware ) wih ).setStatefulKnowledgeSession( ksession );
	}
{code}
which would make more sense to be done by the framework itself, because the case is quite common where a work item handler need an access to a session for various reasons.

so, the above code snippet would belong to XyzWorkItemManager:
{code}
	public void registerWorkItemHandler(String workItemName, WorkItemHandler handler) {
 
                       // HERE
 
                       this.workItemHandlers.put(workItemName, handler);
	}
{code}

/Anatoly

> Adding a StatefulKnowledgeSessionAware Interface
> ------------------------------------------------
>
>                 Key: JBRULES-2554
>                 URL: https://jira.jboss.org/browse/JBRULES-2554
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: drools-api
>    Affects Versions: 5.1.0.M2
>         Environment: N/A
>            Reporter: Anatoly Polinsky
>            Assignee: Mark Proctor
>            Priority: Minor
>         Attachments: StatefulKnowledgeSessionAware.java
>
>   Original Estimate: 1 hour
>  Remaining Estimate: 1 hour
>
> Interface to be implemented by any object that wishes to be notified of the {@link org.drools.runtime.StatefulKnowledgeSession} that it runs in.
> Implementing this interface makes sense for example when an object requires access to session artifacts/details such as rule facts, sessionID, etc.
>  
> This interface can be implemented by a custom {@link org.drools.process.instance.WorkItemHandler} in case, for example, it needs to access a session to insert / retract some facts before proceeding further to the process node that fires rules ( groups, agendas, etc.. ).

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