Github user joewitt commented on a diff in the pull request:
https://github.com/apache/nifi/pull/771#discussion_r73173007
--- Diff:
nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/PersistentProvenanceRepository.java
---
@@ -2166,6 +2171,28 @@ private Lineage computeLineage(final
Collection<String> flowFileUuids, final NiF
}
@Override
+ public ComputeLineageSubmission submitLineageComputation(final long
eventId, final NiFiUser user) {
+ final ProvenanceEventRecord event;
+ try {
+ event = getEvent(eventId);
+ } catch (final Exception e) {
+ logger.error("Failed to retrieve Provenance Event with ID " +
eventId + " to calculate data lineage due to: " + e, e);
+ final AsyncLineageSubmission result = new
AsyncLineageSubmission(LineageComputationType.FLOWFILE_LINEAGE, eventId,
Collections.<String> emptySet(), 1, user.getIdentity());
+ result.getResult().setError("Failed to retrieve Provenance
Event with ID " + eventId + ". See logs for more information.");
+ return result;
+ }
+
+ if (event == null) {
+ final AsyncLineageSubmission result = new
AsyncLineageSubmission(LineageComputationType.FLOWFILE_LINEAGE, eventId,
Collections.<String> emptySet(), 1, user.getIdentity());
+ result.getResult().setError("Could not find Provenance Event
with ID " + eventId);
+ lineageSubmissionMap.put(result.getLineageIdentifier(),
result);
+ return result;
+ }
+
+ return
submitLineageComputation(Collections.singleton(event.getFlowFileUuid()), user,
LineageComputationType.FLOWFILE_LINEAGE, eventId, event.getLineageStartDate(),
Long.MAX_VALUE);
--- End diff --
so first we search on the eventId then we search on the flowfile itself.
Can you describe why/what is happening there? Why isn't the first query
sufficient?
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