Github user ijokarumawak commented on a diff in the pull request:
https://github.com/apache/nifi/pull/3205#discussion_r239684255
--- Diff: nifi-docs/src/main/asciidoc/user-guide.adoc ---
@@ -1091,7 +1091,7 @@ The following prioritizers are available:
- *FirstInFirstOutPrioritizer*: Given two FlowFiles, the one that reached
the connection first will be processed first.
- *NewestFlowFileFirstPrioritizer*: Given two FlowFiles, the one that is
newest in the dataflow will be processed first.
- *OldestFlowFileFirstPrioritizer*: Given two FlowFiles, the one that is
oldest in the dataflow will be processed first. 'This is the default scheme
that is used if no prioritizers are selected'.
-- *PriorityAttributePrioritizer*: Given two FlowFiles that both have a
"priority" attribute, the one that has the highest priority value will be
processed first. Note that an UpdateAttribute processor should be used to add
the "priority" attribute to the FlowFiles before they reach a connection that
has this prioritizer set. Values for the "priority" attribute may be
alphanumeric, where "a" is a higher priority than "z", and "1" is a higher
priority than "9", for example.
+- *PriorityAttributePrioritizer*: Given two FlowFiles, an attribute called
âpriorityâ will be extracted. If only one has that attribute it will go
first. If the attributes can be parsed as a long, they will be ordered largest
number first. For example 9 will come before 1 and 100 will be selected before
99. If only one of them parses as a long that one will be considered to have
the higher priority. Otherwise, they will be ordered in alphanumeric order,
where "a" is a higher priority than "z", and "1" is a higher priority than "9",
for example.
--- End diff --
>If the attributes can be parsed as a long, they will be ordered largest
number first. For example 9 will come before 1 and 100 will be selected before
99
Is this true? As following test case shows, if `1` and `2` are compared,
`1` goes first.
https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-standard-prioritizers/src/test/java/org/apache/nifi/prioritizer/PriorityAttributePrioritizerTest.java#L91
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