abstract class StreamingQueryListener extends Serializable
Interface for listening to events related to StreamingQueries.
- Annotations
- @Evolving()
- Source
- StreamingQueryListener.scala
- Since
2.0.0
- Note
The methods are not thread-safe as they may be called from different threads.
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- StreamingQueryListener
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- new StreamingQueryListener()
Abstract Value Members
-
abstract
def
onQueryProgress(event: QueryProgressEvent): Unit
Called when there is some status update (ingestion rate updated, etc.)
Called when there is some status update (ingestion rate updated, etc.)
- Since
2.0.0
- Note
This method is asynchronous. The status in StreamingQuery will always be latest no matter when this method is called. Therefore, the status of StreamingQuery may be changed before/when you process the event. E.g., you may find StreamingQuery is terminated when you are processing
QueryProgressEvent
.
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abstract
def
onQueryStarted(event: QueryStartedEvent): Unit
Called when a query is started.
Called when a query is started.
- Since
2.0.0
- Note
This is called synchronously with
DataStreamWriter.start()
, that is,onQueryStart
will be called on all listeners beforeDataStreamWriter.start()
returns the corresponding StreamingQuery. Please don't block this method as it will block your query.
-
abstract
def
onQueryTerminated(event: QueryTerminatedEvent): Unit
Called when a query is stopped, with or without error.
Called when a query is stopped, with or without error.
- Since
2.0.0
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!=(arg0: Any): Boolean
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notify(): Unit
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def
notifyAll(): Unit
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def
onQueryIdle(event: QueryIdleEvent): Unit
Called when the query is idle and waiting for new data to process.
Called when the query is idle and waiting for new data to process.
- Since
3.5.0
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