spark技术分享StreamingQueryWrapper — Serializable StreamExecution
StreamingQueryWrapper is a serializable interface of a StreamExecution.
StreamingQueryWrapper has the same StreamExecution API and simply passes all the method calls along to the underlying StreamExecution.
StreamingQueryWrapper takes a single StreamExecution when created.
StreamingQueryWrapper is created when StreamingQueryManager is requested to create a streaming query (when DataStreamWriter is requested to start an execution of the streaming query).
