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Subject [GitHub] dawidwys opened a new pull request #7280: [FLINK-10596][cep] Introduced PatternProcessFunction with access to timerService
Date Tue, 11 Dec 2018 16:22:30 GMT
dawidwys opened a new pull request #7280:  [FLINK-10596][cep] Introduced PatternProcessFunction
with access to timerService
URL: https://github.com/apache/flink/pull/7280
 
 
   ## What is the purpose of the change
   
   This PR introduces `PatternProcessFunction`, which implements `RichFunction`, gives access
to timestamp of match as well as access to `currentProcessingTime` from `TimerService`. There
was introduced an additional optional interface that user can implement, which enables handling
timed out partial matches as well (`TimedOutPartialMatchHandler`).
   
   Those features(rich interface, access to timer service) are needed for integration with
SQL to support UDFs and time operations.
   
   ## Brief change log
   
     - Introduced `PatternProcessFunction`
     - Introduced `TimedOutPartialMatchHandler`
     - mentioned interfaces have access to `TimerContext`
     - addded adapters from old interfaces to `PatternProcessFunction`
     - changed `CepOperator` to work only with process function
   
   ## Verifying this change
   
    - all existing tests pass - support for old interfaces
    - `org.apache.flink.cep.operator.CepOperatorContextTest`
   
   ## 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)
   

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