Questions tagged [webflux]
101 questions
2
votes
1 answer
What are the differences of Flux, Flux>, ResponseEntity> as return type in Spring WebFlux?
I often see three different response return types: Flux, ResponseEntity>, and Flux> in MVC style controllers using Spring WebFlux. The documentation explains the difference between ResponseEntity> and…
Buck
- 471
- 3
- 9
2
votes
1 answer
Is possible to convert a Flux to Mono
I playing around with r2dc for spring boot java application.
I was thinking if possible to convert a Flux to Mono for certain calculation.
Pseudo example:
static PseudoMagic calculate(List foos) {
return…
Dasma
- 1,023
- 13
- 34
2
votes
0 answers
Spring Boot + webflux: Could not resolve view with name
I need to response with image jpeg data
@Controller
@RequestMapping("/resource")
class ResourceController() {
@GetMapping("/thumbnail/{userFileId}/{group}/{index}", produces = [MediaType.IMAGE_JPEG_VALUE])
suspend fun getThumbnail(
…
Hett
- 3,484
- 2
- 34
- 51
2
votes
1 answer
put a "Data class" into Kafka using io.projectreactor.kafka:reactor-kafka jsonserializer problem
I could not find any json serializer in reactor-kafka, so i use org.springframework.kafka.support.serializer.JsonSerializer
I have also try to use com.fasterxml.jackson.databind.annotation.JsonSerialize instead but it didn't work.
can any body help…
Saman Sarem
- 76
- 6
2
votes
0 answers
Allowing a Slash Character In Spring WebFlux Get Requests
I have a spring WebFlux project and it turns out that I need to allow for a Slash in query parameters for a couple API calls.
In Spring MVC you would use the HttpServletRequest to handle that use case like in this example:
@PathVariable in…
SoftwareSavant
- 9,467
- 27
- 121
- 195
2
votes
1 answer
Spring security authorizeExchange and authorizeRequests difference
when use spring security web, we can use the antMathcers
http.authorizeRequests()
.antMatchers("/admin/**")
when use webflux, we use
http.authorizeExchange(exchanges->
exchanges
…
Jimmy Guo
- 1,288
- 1
- 9
- 24
2
votes
3 answers
Project reactor, Convert Flux into Map>
I have a list of Data object
public class Data{
private String id;
private String sharedId;
}
How to convert this list into Map>, collecting the data object sharing the same sharedId together
I have tried to use this line…
Melad Basilius
- 3,847
- 10
- 44
- 81
2
votes
1 answer
Error in Controller layer error handling in spring webflux
So I want to achieve the functionality of saving an user
for that first i check whether user is present
if present throw an exception
else save the user
But when I throw an exception from service layer .flatMap(user -> Mono.error(new…
Devbrat Dash
- 41
- 4
2
votes
1 answer
Example of error handling calling Restful services with WebFlux
I'm looking for a simple example of error handling with WebFlux. I've read lots of stuff online, but can't find something that fits what I want.
I'm running with Spring Boot 2.45
I am calling services like this:
Mono mono =…
Peter Kronenberg
- 878
- 10
- 32
2
votes
1 answer
Transforming a Flux into a Tree with Spring Webflux
We recently started to refactor our Spring WebMVC code to WebFlux, replacing RestTemplate's by WebClient.
From an external web server, we receive a flat list of objects (Product), each of which contains a reference to a parent object:
…
Jay
- 33
- 2
- 8
2
votes
2 answers
Set coroutine context from spring webflux WebFilter
How to set coroutine context from spring webflux WebFilter?
Is it possible?
I know I can use reactor context, but I'm not able to set coroutine context.
MORE DETAILS:
I want to use MDCContext to propagate MDC to slf4j. For example, I would like to…
Eugene Nacu
- 1,613
- 2
- 14
- 22
1
vote
1 answer
Spring: No converter for [class java.util.ArrayList] with preset Content-Type 'null'
I keep getting this error even if the obvious possible causes seems to be taken care of (missing public getters on Survey class, missing jackson from dependency...)
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw…
nicari
- 25
- 1
- 2
- 7
1
vote
2 answers
Handling checked exception in Mono flow
Not sure how to handle checked exception in the Mono flow.
return Mono.when(monoPubs)
.zipWhen((monos) -> repository.findById(...))
.map((tuple) -> tuple.getT2())
.zipWhen((org) -> createMap(org))
…
user1578872
- 7,808
- 29
- 108
- 206
1
vote
1 answer
how to merge the response of webClient call after calling 5 times and save the complete response in DB
i have scenario like:
i have to check the table if entry is available in DB then if available i need to call the same external api n times using webclient, collect all the response and save them in DB. if entry is not available in DB call the old…
user9990
- 93
- 1
- 1
- 6
1
vote
0 answers
Webflux collect errors from list?
I have a List myList. The code looks like:
Flux.fromIterable(myList)
.distinct()
.flatMap(id -> mysvc.getItem(id)
.switchIfEmpty(Mono.error(...))))
Note that mysvc is returning a Mono- and the .switchIfEmpty is attached to…
SledgeHammer
- 7,338
- 6
- 41
- 86