[FLINK-18429][DataStream API] Make CheckpointListener.notifyCheckpointAborted(checkpointId) a default method.

StephanEwen · StephanEwen · commit 4776813cc335 · 2020-06-24T19:07:50.000+02:00
This avoid breaking many user programs that use this interface. This closes apache#12767
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/state/CheckpointListener.java b/flink-runtime/src/main/java/org/apache/flink/runtime/state/CheckpointListener.java
@@ -45,5 +45,5 @@ public interface CheckpointListener {
 	 * @param checkpointId The ID of the checkpoint that has been aborted.
 	 * @throws Exception
 	 */
-	void notifyCheckpointAborted(long checkpointId) throws Exception;
+	default void notifyCheckpointAborted(long checkpointId) throws Exception {};
 }

Original file line number	Diff line number	Diff line change
`@@ -45,5 +45,5 @@ public interface CheckpointListener {`
`45`	`45`	`* @param checkpointId The ID of the checkpoint that has been aborted.`
`46`	`46`	`* @throws Exception`
`47`	`47`	`*/`
`48`		`- void notifyCheckpointAborted(long checkpointId) throws Exception;`
	`48`	`+ default void notifyCheckpointAborted(long checkpointId) throws Exception {};`
`49`	`49`	`}`