AHeise commented on a change in pull request #17536:
URL: https://github.com/apache/flink/pull/17536#discussion_r735863018
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File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/sink/ForwardCommittingHandler.java
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@@ -17,15 +17,19 @@
package org.apache.flink.streaming.runtime.operators.sink;
+import org.apache.flink.api.connector.sink.Committer;
+
import java.io.IOException;
import java.util.List;
/**
* This committer handler simply forwards all committables downstream. It's
used in {@link
* SinkOperator} without committers but with downstream operators (in
streaming, only global
* committer on sink; in batch, committer or global committer present).
+ *
+ * @param <CommT> The input and output type of the {@link Committer}.
*/
-class ForwardCommittingHandler<CommT> extends AbstractCommitterHandler<CommT,
CommT, CommT> {
+class ForwardCommittingHandler<CommT> extends AbstractCommitterHandler<CommT,
Void> {
Review comment:
They are still needed in the current `SinkOperator`:
- In batch with committer, we need `ForwardingCommittingHandler`.
- In stream/batch without any committer, we need `NoopCommittingHandler`.
We could replace them by booleans but it's getting a bit ugly:
- In streaming, we only emit on `notifyCheckpointCompleted`.
- In batch, we only emit on `preSnapshotBarrier`.
So you'd need two booleans afaik. It's certainly less code but I'm not sure
if it's easier to understand.
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