Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/2871#discussion_r90641362
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/MessageAcknowledgingSourceBase.java
---
@@ -73,27 +76,31 @@
* }
* }
* }</pre>
- *
+ *
+ * <b>NOTE:</b> This source has a parallelism of {@code 1}.
+ *
* @param <Type> The type of the messages created by the source.
* @param <UId> The type of unique IDs which may be used to acknowledge
elements.
*/
@PublicEvolving
public abstract class MessageAcknowledgingSourceBase<Type, UId>
extends RichSourceFunction<Type>
- implements Checkpointed<SerializedCheckpointData[]>, CheckpointListener
{
+ implements CheckpointedFunction, CheckpointListener {
private static final long serialVersionUID = -8689291992192955579L;
private static final Logger LOG =
LoggerFactory.getLogger(MessageAcknowledgingSourceBase.class);
+ private static final String MESSAGE_ACKNOWLEDGING_SOURCE_STATE =
"message-acknowledging-source-state";
--- End diff --
See comments on the other functions, I'm not writing it again ... ð
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