How should I use Mono.zipWith when including a function that returns a Mono?
I have a Mono that I want to combine with another Mono, as in:
val firstMono = Mono.just("thing");
val secondMono = Mono.just("other thing");
val thirdMono = firstMono.zipWith(secondMono, function);
But I want the function to also return a Mono, without ending up with a Mono<Mono<?>>
The best I can come up with is:
val thirdMono = firstMono.zipWith(secondMono, function)
.flatMap(identity());
but that seems like a bit of a hack.
I also thought of
val thirdMono = firstMono.zipWith(secondMono)
.flatMap(function);
but in that case, I have to have the function accept a Tuple2 instead of the individual arguments, which is uglier.
Any thoughts?
java spring-webflux project-reactor
asked Nov 12 '18 at 16:40
AndyB
9719
add a comment |
I have a Mono that I want to combine with another Mono, as in:
val firstMono = Mono.just("thing");
val secondMono = Mono.just("other thing");
val thirdMono = firstMono.zipWith(secondMono, function);
But I want the function to also return a Mono, without ending up with a Mono<Mono<?>>
The best I can come up with is:
val thirdMono = firstMono.zipWith(secondMono, function)
.flatMap(identity());
but that seems like a bit of a hack.
I also thought of
val thirdMono = firstMono.zipWith(secondMono)
.flatMap(function);
but in that case, I have to have the function accept a Tuple2 instead of the individual arguments, which is uglier.
Any thoughts?
java spring-webflux project-reactor
asked Nov 12 '18 at 16:40
AndyB
9719
val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2()));...
– Alex Shesterov
Nov 12 '18 at 16:58
Yeah, I had that as well - works, but makes theMonochain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with anotherMono..flatZipWithwould've been nice...
– AndyB
Nov 12 '18 at 17:10
I'd go withvar thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right)));but I guess it's arguable whether this is in any way "prettier".
– korolar
Nov 12 '18 at 17:49
add a comment |
I have a Mono that I want to combine with another Mono, as in:
val firstMono = Mono.just("thing");
val secondMono = Mono.just("other thing");
val thirdMono = firstMono.zipWith(secondMono, function);
But I want the function to also return a Mono, without ending up with a Mono<Mono<?>>
The best I can come up with is:
val thirdMono = firstMono.zipWith(secondMono, function)
.flatMap(identity());
but that seems like a bit of a hack.
I also thought of
val thirdMono = firstMono.zipWith(secondMono)
.flatMap(function);
but in that case, I have to have the function accept a Tuple2 instead of the individual arguments, which is uglier.
Any thoughts?
java spring-webflux project-reactor
asked Nov 12 '18 at 16:40
AndyB
9719
I have a Mono that I want to combine with another Mono, as in:
val firstMono = Mono.just("thing");
val secondMono = Mono.just("other thing");
val thirdMono = firstMono.zipWith(secondMono, function);
But I want the function to also return a Mono, without ending up with a Mono<Mono<?>>
The best I can come up with is:
val thirdMono = firstMono.zipWith(secondMono, function)
.flatMap(identity());
but that seems like a bit of a hack.
I also thought of
val thirdMono = firstMono.zipWith(secondMono)
.flatMap(function);
but in that case, I have to have the function accept a Tuple2 instead of the individual arguments, which is uglier.
Any thoughts?
java spring-webflux project-reactor
java spring-webflux project-reactor
asked Nov 12 '18 at 16:40
AndyB
9719
asked Nov 12 '18 at 16:40
AndyB
9719
asked Nov 12 '18 at 16:40
AndyB
9719
asked Nov 12 '18 at 16:40
AndyB
9719
asked Nov 12 '18 at 16:40
AndyB
9719
9719
val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2()));...
– Alex Shesterov
Nov 12 '18 at 16:58
Yeah, I had that as well - works, but makes theMonochain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with anotherMono..flatZipWithwould've been nice...
– AndyB
Nov 12 '18 at 17:10
I'd go withvar thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right)));but I guess it's arguable whether this is in any way "prettier".
– korolar
Nov 12 '18 at 17:49
add a comment |
val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2()));...
– Alex Shesterov
Nov 12 '18 at 16:58
Yeah, I had that as well - works, but makes theMonochain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with anotherMono..flatZipWithwould've been nice...
– AndyB
Nov 12 '18 at 17:10
I'd go withvar thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right)));but I guess it's arguable whether this is in any way "prettier".
– korolar
Nov 12 '18 at 17:49
val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2())); ...– Alex Shesterov
Nov 12 '18 at 16:58
val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2())); ...– Alex Shesterov
Nov 12 '18 at 16:58
Yeah, I had that as well - works, but makes the
Mono chain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with another Mono. .flatZipWith would've been nice...– AndyB
Nov 12 '18 at 17:10
Yeah, I had that as well - works, but makes the
Mono chain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with another Mono. .flatZipWith would've been nice...– AndyB
Nov 12 '18 at 17:10
I'd go with
var thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right))); but I guess it's arguable whether this is in any way "prettier".– korolar
Nov 12 '18 at 17:49
I'd go with
var thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right))); but I guess it's arguable whether this is in any way "prettier".– korolar
Nov 12 '18 at 17:49
add a comment |
1 Answer
1
active
oldest
votes
I think your solution is good enough.
If you think that it seems like hack, you could place it in a separate utility method and change it when you find the better solution. Something like:
private static <T1, T2, O> Function<Mono<T1>, Publisher<O>> flatZipTransformer(
Mono<T2> p2, BiFunction<T1, T2, Mono<O>> function)
return p1 -> Mono.zip(p1, p2, function).flatMap(Function.identity());
Now you could use it like:
firstMono.transform(flatZipTransformer(secondMono, function))
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
Thanks - I think I’ll stick with myflatMap(identity())solution then - just wanted to know if I was missing something...
– AndyB
Nov 14 '18 at 7:56
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I think your solution is good enough.
If you think that it seems like hack, you could place it in a separate utility method and change it when you find the better solution. Something like:
private static <T1, T2, O> Function<Mono<T1>, Publisher<O>> flatZipTransformer(
Mono<T2> p2, BiFunction<T1, T2, Mono<O>> function)
return p1 -> Mono.zip(p1, p2, function).flatMap(Function.identity());
Now you could use it like:
firstMono.transform(flatZipTransformer(secondMono, function))
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
Thanks - I think I’ll stick with myflatMap(identity())solution then - just wanted to know if I was missing something...
– AndyB
Nov 14 '18 at 7:56
add a comment |
I think your solution is good enough.
If you think that it seems like hack, you could place it in a separate utility method and change it when you find the better solution. Something like:
private static <T1, T2, O> Function<Mono<T1>, Publisher<O>> flatZipTransformer(
Mono<T2> p2, BiFunction<T1, T2, Mono<O>> function)
return p1 -> Mono.zip(p1, p2, function).flatMap(Function.identity());
Now you could use it like:
firstMono.transform(flatZipTransformer(secondMono, function))
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
Thanks - I think I’ll stick with myflatMap(identity())solution then - just wanted to know if I was missing something...
– AndyB
Nov 14 '18 at 7:56
add a comment |
I think your solution is good enough.
If you think that it seems like hack, you could place it in a separate utility method and change it when you find the better solution. Something like:
private static <T1, T2, O> Function<Mono<T1>, Publisher<O>> flatZipTransformer(
Mono<T2> p2, BiFunction<T1, T2, Mono<O>> function)
return p1 -> Mono.zip(p1, p2, function).flatMap(Function.identity());
Now you could use it like:
firstMono.transform(flatZipTransformer(secondMono, function))
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
I think your solution is good enough.
If you think that it seems like hack, you could place it in a separate utility method and change it when you find the better solution. Something like:
private static <T1, T2, O> Function<Mono<T1>, Publisher<O>> flatZipTransformer(
Mono<T2> p2, BiFunction<T1, T2, Mono<O>> function)
return p1 -> Mono.zip(p1, p2, function).flatMap(Function.identity());
Now you could use it like:
firstMono.transform(flatZipTransformer(secondMono, function))
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
answered Nov 13 '18 at 12:19
Alexander Pankin
63126
63126
Thanks - I think I’ll stick with myflatMap(identity())solution then - just wanted to know if I was missing something...
– AndyB
Nov 14 '18 at 7:56
add a comment |
Thanks - I think I’ll stick with myflatMap(identity())solution then - just wanted to know if I was missing something...
– AndyB
Nov 14 '18 at 7:56
Thanks - I think I’ll stick with my
flatMap(identity()) solution then - just wanted to know if I was missing something...– AndyB
Nov 14 '18 at 7:56
Thanks - I think I’ll stick with my
flatMap(identity()) solution then - just wanted to know if I was missing something...– AndyB
Nov 14 '18 at 7:56
add a comment |
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val thirdMono = firstMono.zipWith(secondMono).flatMap(pair -> function(pair.getT1(), pair.getT2()));...– Alex Shesterov
Nov 12 '18 at 16:58
Yeah, I had that as well - works, but makes the
Monochain uglier... Likely, I'm looking for something that doesn't exist - some operator that recognises that I'm working with anotherMono..flatZipWithwould've been nice...– AndyB
Nov 12 '18 at 17:10
I'd go with
var thirdMono = firstMono.flatMap(left -> secondMono.flatMap(right -> function(left, right)));but I guess it's arguable whether this is in any way "prettier".– korolar
Nov 12 '18 at 17:49