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https://issues.apache.org/jira/browse/FLINK-3414?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15403722#comment-15403722
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Till Rohrmann commented on FLINK-3414:
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Hi [~ivan.mushketyk],
I think it would be a good idea to first create a draft of the DSL before
investigating too much effort into the implementation. That way the community
can discuss whether the DSL makes sense and is useful without risking that you
have to make too big changes later on.
> Add Scala API for CEP's pattern definition
> ------------------------------------------
>
> Key: FLINK-3414
> URL: https://issues.apache.org/jira/browse/FLINK-3414
> Project: Flink
> Issue Type: Improvement
> Components: CEP
> Affects Versions: 1.0.0
> Reporter: Till Rohrmann
> Assignee: Ivan Mushketyk
> Priority: Minor
>
> Currently, the CEP library only supports a Java API to specify complex event
> patterns. In order to make it a bit less verbose for Scala users, it would be
> nice to also add a Scala API for the CEP library.
> A Scala API would also allow to pass Scala's anonymous functions as filter
> conditions or as a select function, for example, or to use partial functions
> to distinguish between different events.
> Furthermore, the Scala API could be designed to feel a bit more like a DSL:
> {code}
> begin "start" where _.id >= 42 -> "middle_1" as classOf[Subclass] ||
> "middle_2" where _.name equals "foobar" -> "end" where x => x.id <= x.volume
> {code}
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