Adrian Kreuziger created FLINK-19283:
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Summary: Allow subclasses to override/extend
FlinkKafkaConsumerBase checkpoint methods
Key: FLINK-19283
URL: https://issues.apache.org/jira/browse/FLINK-19283
Project: Flink
Issue Type: Improvement
Components: Connectors / Kafka
Affects Versions: 1.11.1, 1.11.0
Reporter: Adrian Kreuziger
I'm working on a class that extends the FlinkKafkaConsumer to add some
additional functionality the first time the consumer runs. I'd like to be able
to store some additional state, but am unable to do so as the initializeState()
and snapshotState() are marked as final. Ideally I'd like to be able to do
something like
{code:java}
@Override public final void initializeState(FunctionInitializationContext
context) throws Exception {
super.initializeState(context);
// some additional initialization here
}
@Override public final void snapshotState(FunctionSnapshotContext
context) throws Exception {
super.snapshotState(context);
// set some additional state here
}{code}
I'm guessing it was marked final for a reason, is there a reason this would be
problematic? The restoredState and unionOffsetStates properties are still
private which would prevent subclasses from modifying the offset state.
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