T- Type of the elements produced by the source function
CD- The type of the data stored in the checkpoint by the master that triggers
@PublicEvolving public interface ExternallyInducedSource<T,CD> extends SourceFunction<T>, WithMasterCheckpointHook<CD>
Since sources cannot simply create a new checkpoint on their own, this mechanism always goes
together with a
hook on the master side. In a typical setup, the
hook on the master tells the source system (for example the message queue) to prepare a
checkpoint. The exact point when the checkpoint is taken is then controlled by the event stream
received from the source, and triggered by the source function (implementing this interface) in
Flink when seeing the relevant events.
|Modifier and Type||Interface and Description|
|Modifier and Type||Method and Description|
Sets the checkpoint trigger through which the source can trigger the checkpoint.
void setCheckpointTrigger(ExternallyInducedSource.CheckpointTrigger checkpointTrigger)
checkpointTrigger- The checkpoint trigger to set
Copyright © 2014–2021 The Apache Software Foundation. All rights reserved.