The reactor design pattern is an event handling pattern for handling service requests delivered concurrently to a service handler by one or more inputs. The service handler demultiplexes the incoming requests and dispatches them synchronously to the associated request handlers.
Questions tagged [reactor]
735 questions
129
votes
1 answer
Correct way of throwing exceptions with Reactor
I'm new to project Reactor and reactive programming in general.
I'm currently working on a piece of code similar to this:
Mono.just(userId)
.map(repo::findById)
.map(user-> {
if(user == null){
throw new…
davioooh
- 23,742
- 39
- 159
- 250
100
votes
3 answers
Akka or Reactor
I am in the process of starting a new project (java-based). I need to build it as a modular, distributed and resilient architecture.
Therefore I would like to have the business processes to communicate among themselves, be interoperable, but also…
David Riccitelli
- 7,491
- 5
- 42
- 56
49
votes
14 answers
Spring Webflux : Webclient : Get body on error
I am using the webclient from spring webflux, like this :
WebClient.create()
.post()
.uri(url)
.syncBody(body)
.accept(MediaType.APPLICATION_JSON)
.headers(headers)
.exchange()
…
adrien le roy
- 823
- 2
- 7
- 12
41
votes
1 answer
Netflix RxJava vs Spring Reactor
I am evaluating reactor library for using it in our project. I googled a lot but couldn't find the difference(pros /cons) between Netflix's RxJava and Spring's Reactor API. can someone please help me in deciding or provide some pointers?
Thanks.
Roy
- 569
- 1
- 4
- 6
31
votes
10 answers
How to set a timeout in Spring 5 WebFlux WebClient
I'm trying to set timeout on my WebClient, here is the current code :
SslContext sslContext = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
ClientHttpConnector httpConnector = new…
Seb
- 3,602
- 8
- 36
- 52
30
votes
2 answers
What are worker threads, and what is their role in the reactor pattern?
I'm trying to understand the Reactor pattern (concurrent), but in many examples they are talking about 'worker threads'. What are worker threads? In what way do they differ from 'normal' threads? And what is their role in the reactor pattern?
Jon
- 457
- 1
- 5
- 11
26
votes
1 answer
How does backpressure work in Project Reactor?
I've been working in Spring Reactor and had some previous testing that made me wonder how Fluxes handle backpressure by default. I know that onBackpressureBuffer and such exist, and I have also read that RxJava defaults to unbounded until you define…
James Gan
- 407
- 1
- 6
- 11
26
votes
2 answers
How does Python's Twisted Reactor work?
Recently, I've been diving into the Twisted docs. From what I gathered, the basis of Twisted's functionality is the result of it's event loop called the "Reactor". The reactor listens for certain events and dispatches them to registered callback…
deadlock
- 7,048
- 14
- 67
- 115
22
votes
2 answers
Stop twisted reactor on a condition
Is there a way to stop the twisted reactor when a certain condition is reached. For example, if a variable is set to certain value, then the reactor should stop?
gmemon
- 2,573
- 5
- 32
- 37
19
votes
2 answers
Mono> difference with Flux in Spring webflux
My understand is Mono> is a synchronized Flux
and Flux could not be a rest api response.
Am I right?
If not, what's the different between Mono> and Flux
or could a Flux could be a rest api response in some where ?
zhuochen shen
- 1,673
- 4
- 16
- 24
19
votes
2 answers
Multiple reactors (main loops) in one application through threading (or alternative means)
I've got an idea for an app I'd like to work on to learn a bit more about Twisted and WebSockets. I was thinking of integrating a previously written IRC Bot into a web application. As far as I can see it, I would need three reactors to make it…
Mike Trpcic
- 25,305
- 8
- 78
- 114
18
votes
1 answer
How are Mono and Mono.empty() different
As per my understanding, in Spring WebFlux reactor
Mono refers for a void Mono
Mono.empty() refers to void, as calling anything over this gives a null pointer.
How do these stand different in their usage ?
Aditya Rewari
- 2,343
- 2
- 23
- 36
17
votes
2 answers
15
votes
2 answers
Difference between Infinite Java Stream and Reactor Flux
I am trying to figure out the conceptual differences between an infinite Stream and an infinite Flux respectively (if there are any).
For that matter, I have come up with the following examples for an infinite Stream/Flux
@Test
public void…
Felix
- 171
- 1
- 5
12
votes
2 answers
Why Reactor Mono is recognized as an empty Mono?
Here is the piece of code
@Test
public void test_mono_void_mono_empty() {
Mono.just("DATA")
.flatMap(s -> Mono.just(s.concat("-")
.concat(s))
.doOnNext(System.out::println)
…
Serhii Povísenko
- 3,352
- 1
- 30
- 48