August 2018
Intermediate to advanced
372 pages
9h 29m
English
Content preview from Software Architecture with Spring 5.0
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Mono
Mono represents the asynchronous result of a single or empty value (0...1).
The following diagram was taken from the Project Reactor documentation, and it indicates how an item is emitted by a Mono object:
Item emitted by a Mono object
The preceding diagram illustrates the following flow:
- A new value is produced
- An operator is applied to the produced value
- The result is delivered
The following example shows how to work using an empty value:
@Testpublic void givenAnEmptyMono_WhenTheDefaultIfEmptyOperatorIsUsed_ ThenTheDefaultValueIsDeliveredAsResult() throws Exception { String defaultMessage = "Hello world"; Mono<String> emptyMonoMessageProduced ...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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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.