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https://issues.apache.org/jira/browse/FLINK-1977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14532539#comment-14532539
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ASF GitHub Bot commented on FLINK-1977:
---------------------------------------
GitHub user aljoscha opened a pull request:
https://github.com/apache/flink/pull/659
[FLINK-1977] Rework Stream Operators to always be push based
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/flink event-time
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/659.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #659
----
commit 2e2abbd4afb6f058abb7b5d4a287349cdef5d8f6
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2015-05-04T13:53:36Z
[FLINK-1977] Rework Stream Operators to always be push based
commit 58843949102c0506b30c80cfb36065d303a64cda
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2015-05-06T16:11:52Z
Change StreamOperator to be an Interface
This introduces new AbstractOperator classes for UDF operators and
operators without UDFs.
commit 4e0fadd4c4069817362382dbe8c7287f3b0150ff
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2015-05-07T07:39:54Z
Change StreamOperator to take Output instead of Collector
Output is a richer Interface that extends Collector. Right now it does
not contain additional methods. But this will be extended to support
forwarding of Low Watermarks/Barriers.
commit f0d2c3bb47a63ed50f543732665a8b88872d839d
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2015-05-07T09:06:52Z
Simplify StreamTask and derived classes
commit a4be5138c6262e104d83263d6e4800e416d6fd4a
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2015-05-07T09:19:44Z
Remove unused imports
----
> Rework Stream Operators to always be push based
> -----------------------------------------------
>
> Key: FLINK-1977
> URL: https://issues.apache.org/jira/browse/FLINK-1977
> Project: Flink
> Issue Type: Improvement
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> This is a result of the discussion on the mailing list. This is an excerpt
> from the mailing list that gives the basic idea of the change:
> I propose to change all streaming operators to be push based, with a
> slightly improved interface: In addition to collect(), which I would
> call receiveElement() I would add receivePunctuation() and
> receiveBarrier(). The first operator in the chain would also get data
> from the outside invokable that reads from the input iterator and
> calls receiveElement() for the first operator in a chain.
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