Difference Between Flux.create and Flux.generate

Question

What is the difference between Flux.create and Flux.generate? I am looking--ideally with an example use case--to understand when I should use one or the other.

Answer 1

Create

• Accepts a Consumer>
• Consumer is invoked only once per subscriber
• Consumer can emit 0..N elements immediately
• Publisher is not aware of downstream state. So we need to provide Overflow strategy as an additional parameter
• We can get the reference of FluxSink using which we could keep on emitting elements as and when required using multiple threads.

Generate:

• Accepts a Consumer>
• Consumer is invoked again and again based on the downstream demand
• Consumer can emit only one element at the max with an optional complete/error signal.
• Publisher produces elements based on the downstream demand
• We can get the reference of SynchronousSink. But it might not be really useful as we could emit only one element

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