Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/2871#discussion_r90639653
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/functions/source/FromElementsFunction.java
---
@@ -62,6 +73,9 @@
/** Flag to make the source cancelable */
private volatile boolean isRunning = true;
+ private transient ListState<Integer> checkpointedState;
+
+ private static final String FROM_ELEMENT_STATE_NAME =
"from-element-state";
--- End diff --
Instead of this you could also have
```
private static final ListStateDescriptor<Integer> STATE_DESCRIPTOR =
new ListStateDescriptor<>("from-elements-state",
IntSerializer.INSTANCE);
```
and then use this descriptor later directly instead of initialising with
this field.
That's just a personal style nitpick. Your version is also fine. ð
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