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Mono and Flux

Pragya Keshap answered on February 11, 2023 Popularity 6/10 Helpfulness 1/10

answer Mono and Flux

Mono and Flux

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Mono is a special type of Publisher. A Mono object represents a single or empty value. This means it can emit only one value at most for the onNext() request and then terminates with the onComplete() signal. In case of failure, it only emits a single onError() signal.

Flux is a standard Publisher that represents 0 to N asynchronous sequence values. This means that it can emit 0 to many values, possibly infinite values for onNext() requests, and then terminates with either a completion or an error signal.

public class PushPipeline {
    private HotelPriceConsumer hotelPriceConsumer;
    private PriceBatchCreator priceBatchCreator;
    private PriceBatchToTransactionConverter priceBatchToTransactionConverter;
    private HttpClient httpClient;
    private PriceLogger priceLogger;

    private Disposable mainPipeline;

    @PostConstruct
    void initMainPipeline() {
        // For bootstrapping the pipeline with Spring
        // subscribe() does not block the calling thread here!
        mainPipeline: mainPipeline().subscribe();
    }

    private Flux<Void> mainPipeline() {
        hotelPriceConsumer
            .consumeKafkaTopic()
            .transformDeferred(priceBatchCreator::createBatches)
            .transformDeferred(priceBatchToTransactionConverter::convert)
            .flatMap(transaction -> httpClient
                .send(transaction)
                .then(priceLogger.log(transaction)))
            .onErrorContinue((t, o) -> {/* Some logging + metrics */}));
    }
}

https://www.baeldung.com/java-reactor-flux-vs-mono

Popularity 6/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: flux java mono

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Contributed on Feb 11 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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