August 2018
Intermediate to advanced
372 pages
9h 29m
English
Content preview from Software Architecture with Spring 5.0
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Back pressure
Back pressure is a mechanism that allows us to specify the required number of elements to be read at once. It is used when you're interested in chunks of data with a defined quantity of n elements. The data is delivered in chunks until the whole dataset is reached.
Suppose that you want chunks of data with three elements, from a Flux object with ten elements. In this case, you will retrieve the data four times, as shown in the following example:
@Testpublic void givenAFluxWith10Elements_WhenBackPressureAsksForChunksOf3Elements_ThenYouHave4Chunks()throws Exception { List<Integer> digitsArray = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 0); Flux<Integer> fluxWithDigits = Flux.fromIterable (digitsArray); fluxWithDigits.buffer(Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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