Is there anything for `Channel` that works like Rx...
# coroutines
a
Is there anything for
Channel
that works like RxJava
Observable.sample()
operator? http://reactivex.io/RxJava/javadoc/io/reactivex/Observable.html#sample-io.reactivex.ObservableSource-boolean- Use case: I have a pair of 2
suspend
functions:
write()
and
read()
. Under the hood writing fires an action and the action's result gets pushed to a
Channel
that I consume using
receive()
in
read()
. I could as well combine them into a
writeForResult()
that just returns the value, but I don't think it makes a difference here. Problem is that while I can invoke
write()
many times in a short period (let's say 100/second),
read()
results are delayed by ~100ms each (so 10/second) in their
Channel
(which I consume). Example steps: 1. Call
write()
and
read()
one after the other. 2. Repeat above BEFORE ~100ms pass -
write()
called before
read()
in 1 returned a value, second
read()
should return
null
immediately. 3. Repeat above AFTER ~100ms pass -
write()
called after
read()
in 1 returned a value, second
read()
should return a normal non-null value. I guess I could achieve something similar with `wait()`/`notify()` on a Java object, but I'm trying to solve it using `Channel`s. And as in my initial question -
Observable.sample()
seems perfect for this case, but I don't want to import Rx just for this one issue. I tried various experiments with a proxy channel that uses
ConflatedChannel
(which always holds the latest value). There's also a thing called
Mutex
, but I'm not sure if it's right to use here. Any other ideas?
v
Hi,
sample
operator can be implemented using
select
with
onReceive
on two channels. Our idea is not to introduce dozens of Rx-like operators, but to provide building blocks which can be used to build any operator without much complexity
a
Hey, thanks for the reply. Yes, I agree it's good to keep the base library lightweight. I'm also sure with as the popularity of coroutines rises we'll see more and more external libraries/solutions. Anyway, turns out I was overcomplicating my case by trying to channel everything, while a combination of
Channel
, a regular collection and simple lock/flag was enough. But I'll still check what's possible with your suggestion. ­čÖé