Github user satishd commented on a diff in the pull request:
https://github.com/apache/storm/pull/2241#discussion_r129517427
--- Diff: storm-client/src/jvm/org/apache/storm/task/IOutputCollector.java
---
@@ -30,4 +31,5 @@
void ack(Tuple input);
void fail(Tuple input);
void resetTimeout(Tuple input);
+ void flush();
--- End diff --
It is kind of external facing API as it is given to bolt implementors in
prepare
[API](https://github.com/apache/storm/blob/master/storm-client/src/jvm/org/apache/storm/task/IBolt.java#L55).
`IOutputCollector` can be wrapped by users to do any custom processing before
they are emitted to target tasks.
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