Github user dawidwys commented on a diff in the pull request:
https://github.com/apache/flink/pull/3963#discussion_r118050667
--- Diff:
flink-libraries/flink-cep-scala/src/main/scala/org/apache/flink/cep/scala/PatternStream.scala
---
@@ -296,25 +294,94 @@ class PatternStream[T](jPatternStream:
JPatternStream[T]) {
* timeout events wrapped in a [[Either]] type.
*/
def flatSelect[L: TypeInformation, R: TypeInformation](
- patternFlatTimeoutFunction: (mutable.Map[String, JList[T]], Long,
Collector[L]) => Unit) (
- patternFlatSelectFunction: (mutable.Map[String, JList[T]],
Collector[R]) => Unit)
+ patternFlatTimeoutFunction: (Map[String, Iterable[T]], Long,
Collector[L]) => Unit) (
+ patternFlatSelectFunction: (Map[String, Iterable[T]], Collector[R])
=> Unit)
: DataStream[Either[L, R]] = {
val cleanSelectFun = cleanClosure(patternFlatSelectFunction)
val cleanTimeoutFun = cleanClosure(patternFlatTimeoutFunction)
val patternFlatSelectFun = new PatternFlatSelectFunction[T, R] {
- override def flatSelect(pattern: JMap[String, JList[T]], out:
Collector[R]): Unit = {
- cleanSelectFun(pattern.asScala, out)
+ override def flatSelect(pattern: JMap[String, JList[T]], out:
Collector[R]): Unit =
+ cleanSelectFun(mapToScala(pattern), out)
+ }
+
+ val patternFlatTimeoutFun = new PatternFlatTimeoutFunction[T, L] {
+ override def timeout(
+ pattern: JMap[String, JList[T]],
+ timeoutTimestamp: Long, out: Collector[L])
+ : Unit = {
+ cleanTimeoutFun(mapToScala(pattern), timeoutTimestamp, out)
}
}
--- End diff --
This is the scala way of applying `flatFunction`. We also provide both of
those alternatives for e.g. `DataStream#flatMap`.
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