flink cep result DataStream no data print

[Zhou Zach]

code:


val inpurtDS = 
streamTableEnv.toAppendStream[BehaviorInfo](behaviorTable)inpurtDS.print()val 
pattern = Pattern.begin[BehaviorInfo]("start")
  .where(_.clickCount > 7)val patternStream = CEP.pattern(inpurtDS, pattern)
val result: DataStream[BehaviorInfo] = patternStream.process(
  new PatternProcessFunction[BehaviorInfo, BehaviorInfo]() {
    override def processMatch(
                               matchPattern: util.Map[String, 
util.List[BehaviorInfo]],
                               ctx: PatternProcessFunction.Context,
                               out: Collector[BehaviorInfo]): Unit = {
      try {
        println(
          s"""
             |matchPattern: $matchPattern
             |util.List[BehaviorInfo]: ${matchPattern.get("start")}
             |""".stripMargin)
        out.collect(matchPattern.get("start").get(0))
      } catch {
        case exception: Exception =>
          println(exception)
      }
    }
  })
result.print()



??????inpurtDS.print()????????????????????????????pattern??????result.print()????????PatternProcessFunction????processMatch??????????????????????????????????????????????????????????


Thanks a lot!