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https://issues.apache.org/jira/browse/STORM-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15311928#comment-15311928
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ASF GitHub Bot commented on STORM-1873:
---------------------------------------
Github user arunmahadevan commented on a diff in the pull request:
https://github.com/apache/storm/pull/1453#discussion_r65500739
--- Diff:
storm-core/src/jvm/org/apache/storm/topology/base/BaseWindowedBolt.java ---
@@ -255,6 +255,17 @@ public BaseWindowedBolt withTimestampField(String
fieldName) {
}
/**
+ * Turns on or off, on a per component basis, the emission of late
tuples on a stream
+ * called _late.
+ *
+ * @param flag the flag to indicate whether to emit late tuples
+ */
+ public BaseWindowedBolt withLateTupleEmission(Boolean flag) {
+ windowConfiguration.put(Config.TOPOLOGY_BOLTS_EMIT_LATE_TUPLE,
flag);
--- End diff --
good to add validation to ensure this is used with timestamp field (like
you had in your earlier patch).
> Reemit late tuples in windowed mode
> -----------------------------------
>
> Key: STORM-1873
> URL: https://issues.apache.org/jira/browse/STORM-1873
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Balazs Kossovics
>
> Currently late tuples are just logged (and acknowledged in the coming 1.0.2),
> but in our use-case it would be desirable to emit them on a different stream
> than the default.
> I implemented a first version, where every windowed bolt are going to have a
> '_late' stream by default, and component-specific parameter
> (Config.TOPOLOGY_BOLTS_EMIT_LATE_TUPLE) the definer of the bolt could turn on
> or off the emission of the late tuples on this stream.
> One could turn on the emission of late tuples with a builder method like this:
> {code:title=MyWindowedBolt.java|borderStyle=solid}
> new MyWindowedBolt()
> .withTimestampField("timestamp")
> .withLateTupleEmission(true)
> .withWindow(
> new BaseWindowedBolt.Duration(1, TimeUnit.MINUTES),
> new BaseWindowedBolt.Duration(1, TimeUnit.SECONDS)
> );
> {code}
> What do you think about it?
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