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https://issues.apache.org/jira/browse/FLINK-3216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125524#comment-15125524
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ASF GitHub Bot commented on FLINK-3216:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1557#issuecomment-177622750
Super nice!
Has documentation, tests, JavaDocs. Very good all in all!
The builds fail on Scala 2.11 build profiles in different maven projects.
Errors look like there may be mixups with Scala versions. However, I cannot see
how this pull request could have caused that...
If the Scala errors can be resolved with a rebase to the latest master, +1
from my side
> Define pattern specification
> ----------------------------
>
> Key: FLINK-3216
> URL: https://issues.apache.org/jira/browse/FLINK-3216
> Project: Flink
> Issue Type: Sub-task
> Reporter: Till Rohrmann
>
> In order to detect event patterns we first have to define the pattern. This
> issue tracks the progress of implementing a user facing API to define event
> patterns.
> Patterns should support the following operations
> * next(): The given event has to follow directly after the preceding event
> followedBy(): The given event has to follow the preceding event. There might
> occur other events in-between
> * every(): In a follow-by relationship a starting event can be matched with
> multiple successive events. Consider the pattern a → b where → denotes the
> follow-by relationship. The event sequence a, b, b can be matched as a, b or
> a, (b), b where the first b is left out. The essential question is whether a
> is allowed to match multiple times or only the first time. The method every
> specifies exactly that. Every events in a pattern can match with multiple
> successive events. This makes only sense in a follow-by relationship, though.
> * followedByEvery(): Similar to followedBy just that the specified element
> can be matched with multiple successive events
> * or(): Alternative event which can be matched instead of the original event:
> every(“e1”).where().or(“e2”).where()
> * within(): Defines a time interval in which the pattern has to be completed,
> otherwise an incomplete pattern can be emitted (timeout case)
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