pnowojski commented on a change in pull request #8124: [FLINK-11877] Implement
the runtime handling of the InputSelectable interface
URL: https://github.com/apache/flink/pull/8124#discussion_r274820408
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/UnionInputGate.java
##########
@@ -197,22 +217,23 @@ public void requestPartitions() throws IOException,
InterruptedException {
return Optional.of(bufferOrEvent);
}
- @Override
- public Optional<BufferOrEvent> pollNextBufferOrEvent() throws
UnsupportedOperationException {
- throw new UnsupportedOperationException();
- }
-
- private InputGateWithData waitAndGetNextInputGate() throws IOException,
InterruptedException {
+ private InputGateWithData waitAndGetNextInputGate(boolean blocking)
throws IOException, InterruptedException {
Review comment:
I doubt there would be a measurable difference. You can use existing network
stack benchmarks to check for that. When I was introducing `Optional` in
`getNextBufferOrEvent`, there was none. Furthermore since `getNextBufferOrEvent
` is already using and constructing `Optional`, I'm pretty sure that `Optional`
in `waitAndGetNextInputGate` would JIT inline to a no-op.
But sure, if you can show that `@Nullable` is faster, then +1 from my side
for it. Otherwise `Optional` is safer than `@Nullable`.
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