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https://issues.apache.org/jira/browse/FLINK-9538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16504348#comment-16504348
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ASF GitHub Bot commented on FLINK-9538:
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GitHub user yanghua opened a pull request:
https://github.com/apache/flink/pull/6134
[FLINK-9538] Make KeyedStateFunction an interface
## What is the purpose of the change
*This pull request makes KeyedStateFunction an interface*
## Brief change log
- *Change abstract class `KeyedStateFunction` to be an interface*
- *Change abstract method `process` to be an interface method*
## Verifying this change
This change is already covered by existing tests, such as
*StateBackendTestBase*.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes /
**no** / don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (not applicable / docs /
JavaDocs / **not documented**)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yanghua/flink FLINK-9538
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/6134.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 #6134
----
commit c6e4cb6cef99306f402e6e7e50c066f8a60e41f4
Author: yanghua <yanghua1127@...>
Date: 2018-06-07T07:27:25Z
[FLINK-9538] Make KeyedStateFunction an interface
----
> Make KeyedStateFunction an interface
> ------------------------------------
>
> Key: FLINK-9538
> URL: https://issues.apache.org/jira/browse/FLINK-9538
> Project: Flink
> Issue Type: Improvement
> Reporter: Dawid Wysakowicz
> Assignee: vinoyang
> Priority: Major
>
> I suggest to change the KeyedStateFunction from abstract class to interface
> (FunctionalInterface in particular) to enable passing lambdas.
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