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https://issues.apache.org/jira/browse/FLINK-5851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16071572#comment-16071572
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mingleizhang commented on FLINK-5851:
-------------------------------------
They are often used interchangeably, but has small differences. Promise is the
function that set the value (return as a Future) of a async function, a promise
from Wiki. I probably work on this soon.
> Renaming AsyncCollector into ResultPromise/ResultFuture
> -------------------------------------------------------
>
> Key: FLINK-5851
> URL: https://issues.apache.org/jira/browse/FLINK-5851
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API
> Affects Versions: 1.2.0, 1.3.0
> Reporter: Till Rohrmann
> Fix For: 1.4.0
>
>
> Currently, the async I/O API gives an {{AsyncCollector}} to an
> {{AsyncFunction}} implementation. The name does not really reflect what the
> {{AsyncCollector}} does since it does not collect but is actually a one time
> completable future. Therefore, I propose to rename the {{AsyncCollector}}
> into {{ResultPromise}} or {{ResultFuture}}. This is API changing.
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