class SparkConnectStreamingQueryListenerHandler extends Logging
Handle long-running streaming query listener events.
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- new SparkConnectStreamingQueryListenerHandler(executeHolder: ExecuteHolder)
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- def handleListenerCommand(command: StreamingQueryListenerBusCommand, responseObserver: StreamObserver[ExecutePlanResponse]): Unit
The handler logic.
The handler logic. The handler of ADD_LISTENER_BUS_LISTENER uses the streamingQueryListenerLatch to block the handling thread, preventing it from sending back the final ResultComplete response.
The handler of REMOVE_LISTENER_BUS_LISTENER cleans up the server side listener resources and count down the latch, allowing the handling thread of the original ADD_LISTENER_BUS_LISTENER to proceed to send back the final ResultComplete response.
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(Since version 9)