[rules-users] Drools Flow :Persistence Problem : Restore StatefulKnowledgeSession from databse

[Pardeep . Ruhil]

Hi,

I have a query regarding Drools Persistence.

I have a scenario in which I want to know whether drool persistence will work or not.

 

Lets say I am in between a workflow and suddenly my server creashes.

Suppose my workFlow was completed upto 3 steps with lets say 2 more steps to go.

As I am using drools-persistence Api methods so my data regarding the session , variable and process will go into the database specified by me in the tables 'SessionInfo', VaraibleInstanceInfo', and ProcessInstanceInfo and 'WorkItemInfo' tables of the database.

 

Now as my server crashed and I restarted my application.

So now I will restore the session object as my applicaiton got crashed from the database using the below code.

this.ksession = JPAKnowledgeService.loadStatefulKnowledgeSession(id, kbase, null, env);

Now as I have restarted the server, KnowledgeBase object i.e. 'kbase' will become null and so as Enviorment Class object  'env'. 

Are KnowledgeBase object are stored as well in the database ???

or I have to create a new KnowledgeBase to load the previous StatefulKnowledgeSession object.

So in short how can I restore the previous session or If I cann't restore it can I do that by storing the Knowledgebase object and Enviorment Object in the database as well.

Please help me how can this be achieved.

Thanks & Regards

Pardeep Ruhil

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