The deserialization schema describes how to turn the PubsubMessages into data types (Java/Scala objects) that are processed by Flink.
A factory class to create a
This class contains a checkpointId and a List of AcknowledgementIds.
|AcknowledgeOnCheckpoint<ACKID extends Serializable>||
Helper class for SourceFunctions to acknowledge messages to external systems after a successful checkpoint.
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