How to create Drools rule file for each user using Apache Storm?

Question

We are making Storm application, there we need to create rule file for each user.it is possible or not?

score 1 · Accepted Answer · answered Dec 02 '16 at 11:57

Yes , you can create the rule file based on user.

Me also done some R&D on this user based rule generation , in my scenario i have created the rule file as same as device_id , whenever i am getting the packet with that user i am loading the rule file with that name in the bolt.

Bolt:

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
                try {
                    kbuilder.add(ResourceFactory.newInputStreamResource(new FileInputStream(new File("C:/IotHub/conf/"+deviceID))), ResourceType.DRL );
                } catch (FileNotFoundException e) {
                }
                KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
                kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
               // 
               StatelessKnowledgeSession  ksession = kbase.newStatelessKnowledgeSession();

                ksession.execute(bean);

In my scenario , deviceId is the rule file name of that device

bean - is your java bean

yes i got idea but my question is there is no device id.where i need to call rule file in Storm in spout,bolt or topology? — Rahul Pandey, Dec 02 '16 at 12:06
Not spout , there are two way is there:1.you can load the drl in the bolt constructor 2.You can load in the bolt class as i mentioned above. — Mahabaleshwar, Dec 02 '16 at 12:23
thanks a lot sir for giving reply now i got idea, i will do it. — Rahul Pandey, Dec 02 '16 at 12:57

How to create Drools rule file for each user using Apache Storm?

1 Answers1