你好,我在使用广播流的时候定义了一个MapState,并在逻辑处理中往其中放数据,但是我始终没法成功更新其值,忘解惑。 

定义:
private val carEfenceState: MapState[String, Boolean] = new
MapStateDescriptor[String, Boolean]("carEfenceState", classOf[String],
classOf[Boolean])

存值:
carEfenceState.put(mapKey, true)

取值:
carEfenceState.get(mapKey)

取到的值始终为 false.

Thanks in advance!



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