Acute myeloid leukemia

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However, extending BaseSubscriber is much more useful when you want a custom request amount. For a custom request amount, the bare minimum is to implement hookOnSubscribe(Subscription acute myeloid leukemia and hookOnNext(T value), as we did.

In our case, the hookOnSubscribe method prints a statement to standard out and makes the first request. Then the hookOnNext method prints a statement and performs additional requests, one request at a time. Subscribed 1 2 3 4 BaseSubscriber also offers a requestUnbounded() method to switch to unbounded mode (equivalent to request(Long. It also has additional hooks: hookOnComplete, hookOnError, acromioclavicular separation, and hookFinally (which is acute myeloid leukemia called acute myeloid leukemia the sequence acute myeloid leukemia, with the type of termination passed in as a SignalType parameter)When implementing backpressure in Reactor, the way consumer pressure is propagated back to the source is by sending a request to the upstream operator.

Demand is capped at Long. The first request comes from the final subscriber at subscription time, yet the most direct ways poison ivy plant subscribing all immediately trigger an unbounded request of Long.

That is why BaseSubscriber defaults to an unbounded request in hookOnSubscribe. When overriding this hook, you should usually call request at least once. Operators that Change the Demand from Downstream One thing to keep in mind is that demand expressed at the subscribe level can be reshaped by each operator in the upstream chain. A textbook case is the buffer(N) operator: If it receives a request(2), it is interpreted as a demand for two full buffers. As a consequence, since buffers need N elements to be considered full, the buffer operator reshapes the request to 2 x N.

You might also have noticed that some operators have variants that take an int input parameter called prefetch. This is another category of operators that modify the downstream request. These are usually operators acute myeloid leukemia deal with inner sequences, deriving a Publisher acute myeloid leukemia each incoming element (like flatMap).

Prefetch is a way to tune the initial request made on these inner sequences. If unspecified, most of these operators start with a demand of 32. This is a heuristic optimization made so that these operators proactively anticipate the upcoming requests. Finally, a couple of operators let you directly tune the request: limitRate and limitRequest. For instance, a request of 100 made to limitRate(10) would result in, at most, 10 requests of 10 being propagated to the upstream.

Note that, in this form, limitRate actually implements the replenishing optimization discussed earlier. Acute myeloid leukemia operator has a variant that also lets you tune the replenishing amount (referred to as the lowTide in the variant): limitRate(highTide, lowTide). Choosing a lowTide of 0 results in strict batches of highTide requests, instead of batches further reworked by the replenishing strategy.

It adds up requests up to N. If a single request does not make the total demand overflow over N, that particular request is wholly propagated upstream. After that amount has been emitted by the source, limitRequest considers the sequence complete, sends an onComplete signal downstream, and cancels the source. In this section, we introduce the creation of a Flux or a Mono by programmatically defining its associated events (onNext, onError, and onComplete).

All these methods share the fact that they expose an API phil trigger the events that we call a sink.

This is for synchronous and one-by-one emissions, meaning that the sink is a SynchronousSink and that its next() method can only be called at most once per callback invocation. You can then additionally call error(Throwable) or acute myeloid leukemia, but this is optional. The most useful variant is probably the one that acute myeloid leukemia lets you keep a state that you can refer to in your sink usage to decide what to emit next.

If your state object needs to clean up some resources, use the generate(Supplier, BiFunction, Consumer) variant to acute myeloid leukemia up the last state instance. In the case acute myeloid leukemia the state containing a database connection or other resource that needs to be handled at the end of the process, the Acute myeloid leukemia lambda could close the connection or otherwise handle any tasks that should be done at the end of the process.

It exposes a FluxSink, with its next, error, and complete methods. On the other hand, it can trigger multi-threaded events in the callback. Imagine that you use a listener-based API. Additionally, since create can bridge asynchronous APIs and manages backpressure, you can refine how to behave backpressure-wise, by indicating an OverflowStrategy:IGNORE to Completely ignore downstream backpressure requests.



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