[jira] [Created] (NIFI-4810) Improve Extensibility of WriteAheadProvenanceRepository

["Mao Ito (JIRA)" <ji...@apache.org>]

Mao Ito created NIFI-4810:
-----------------------------

             Summary: Improve Extensibility of WriteAheadProvenanceRepository
                 Key: NIFI-4810
                 URL: https://issues.apache.org/jira/browse/NIFI-4810
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
            Reporter: Mao Ito


If we want to create some new ProvenanceRepository extending WriteAheadProvenanceRepository, we have some issues.

The scenarios is that the new ProvenanceRepsoitory just intercept event without losing the functionality of WriteAheadProvenanceRepository (i.e. allow writing message into the disk).

In this scenario, 

We can just override the method of "registerEvents".
And, the issue is that we want to get "eventId" assigned by WriteAheadProvenanceRepository.

However, there is no efficient and easy way to get these eventIds as far as I see.

We have the below options to improve it:

1. change "private" to "protected" for fields of WriteAheadProvenanceRepository
2. return "StorageResult" for "registerEvents" method

StorageResult includes "eventIds" assigned by WriteAheadProvenanceRepository

If there is actually an easy way to do, give us some comments.

 



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)