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https://issues.apache.org/jira/browse/NIFI-4262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16126104#comment-16126104
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ASF GitHub Bot commented on NIFI-4262:
--------------------------------------
Github user mattyb149 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2056#discussion_r133019133
--- Diff:
nifi-nar-bundles/nifi-extension-utils/nifi-processor-utils/src/main/java/org/apache/nifi/processor/util/bin/Bin.java
---
@@ -173,4 +174,19 @@ public long getBinAge() {
final long ageInNanos = System.nanoTime() - creationMomentEpochNs;
return TimeUnit.MILLISECONDS.convert(ageInNanos,
TimeUnit.NANOSECONDS);
}
+
+ /**
+ * @return the UUID of the flow file generated by the merge of this
bin's content
+ */
+ public String getUuid() {
+ return uuid;
+ }
+
+ /**
+ * Set the UUID of the flow file generated by the merge of this bin's
content
+ * @param uuid UUID to set
+ */
+ public void setUuid(String uuid) {
--- End diff --
Is this the only place the association can be done? Would be nicer if the
UUID could be added at transfer time rather than extending the Bin API.
> MergeContent - option to add merged uuid in original flow files
> ---------------------------------------------------------------
>
> Key: NIFI-4262
> URL: https://issues.apache.org/jira/browse/NIFI-4262
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Reporter: Pierre Villard
> Assignee: Pierre Villard
>
> With the apparition of Wait/Notify processors it is now possible tackle new
> challenges when it comes to synchronize the execution of different parts of
> the workflow.
> The objective here is the following:
> Flow files are sent to a MergeContent processor. Merged flow files are then
> sent to a processor A while original flow files are sent to a processor B. I
> want to trigger processor B when and only when processor A has completed.
> To use the Wait/Notify approach, a common attribute must be available to be
> used as a signal in the distributed cache. This JIRA is about adding a
> processor property allowing a user to add the UUID of the merged flow file as
> a new attribute of all the original flow files that are constituting the
> merged flow file.
> The template attached to NIFI-4028 can be used for this use case. Note that
> the fix for NIFI-4028 is needed to solve the use case described in this JIRA.
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