Create an Observable that generates a Single on subscribe, but which stops and reuses a specific value
I'm using Retrofit to make an API call, which returns a Single, and I use onErrorReturn to convert any exceptions to a default object. I want consumers to see the current value, but if the current value is the default object, I want to try to requery the API and send that result out in addition. To complicate things, I might have multiple subscribers to this.
So, I know the Retrofit Single has to be converted to a proper Observable stream and not just an onNext/onComplete like a normal Single.toObservable would, but I don't know how to requery the API and push the value back out to my previous subscribers using only the Single from Retrofit.
Right now, I do:
fun request(): Observable<Foo> {
if (behaviorSubject.value == defaultObject) {
API
.request()
.onErrorReturn(defaultObject)
.subscribe(behaviorSubject)
}
return behaviorSubject
}
But I know that calling subscribe is violating Rx chaining, so I'm trying to figure out how to get rid of that.
retrofit2 rx-java2
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
add a comment |
I'm using Retrofit to make an API call, which returns a Single, and I use onErrorReturn to convert any exceptions to a default object. I want consumers to see the current value, but if the current value is the default object, I want to try to requery the API and send that result out in addition. To complicate things, I might have multiple subscribers to this.
So, I know the Retrofit Single has to be converted to a proper Observable stream and not just an onNext/onComplete like a normal Single.toObservable would, but I don't know how to requery the API and push the value back out to my previous subscribers using only the Single from Retrofit.
Right now, I do:
fun request(): Observable<Foo> {
if (behaviorSubject.value == defaultObject) {
API
.request()
.onErrorReturn(defaultObject)
.subscribe(behaviorSubject)
}
return behaviorSubject
}
But I know that calling subscribe is violating Rx chaining, so I'm trying to figure out how to get rid of that.
retrofit2 rx-java2
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
add a comment |
I'm using Retrofit to make an API call, which returns a Single, and I use onErrorReturn to convert any exceptions to a default object. I want consumers to see the current value, but if the current value is the default object, I want to try to requery the API and send that result out in addition. To complicate things, I might have multiple subscribers to this.
So, I know the Retrofit Single has to be converted to a proper Observable stream and not just an onNext/onComplete like a normal Single.toObservable would, but I don't know how to requery the API and push the value back out to my previous subscribers using only the Single from Retrofit.
Right now, I do:
fun request(): Observable<Foo> {
if (behaviorSubject.value == defaultObject) {
API
.request()
.onErrorReturn(defaultObject)
.subscribe(behaviorSubject)
}
return behaviorSubject
}
But I know that calling subscribe is violating Rx chaining, so I'm trying to figure out how to get rid of that.
retrofit2 rx-java2
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
I'm using Retrofit to make an API call, which returns a Single, and I use onErrorReturn to convert any exceptions to a default object. I want consumers to see the current value, but if the current value is the default object, I want to try to requery the API and send that result out in addition. To complicate things, I might have multiple subscribers to this.
So, I know the Retrofit Single has to be converted to a proper Observable stream and not just an onNext/onComplete like a normal Single.toObservable would, but I don't know how to requery the API and push the value back out to my previous subscribers using only the Single from Retrofit.
Right now, I do:
fun request(): Observable<Foo> {
if (behaviorSubject.value == defaultObject) {
API
.request()
.onErrorReturn(defaultObject)
.subscribe(behaviorSubject)
}
return behaviorSubject
}
But I know that calling subscribe is violating Rx chaining, so I'm trying to figure out how to get rid of that.
retrofit2 rx-java2
retrofit2 rx-java2
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
asked Nov 16 '18 at 20:42
Heath Borders
19.6k999192
19.6k999192
add a comment |
add a comment |
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