ZIO is a zero-dependency Scala library for asynchronous and concurrent programming with similar features as Cats IO or Monix.
ZIO — A type-safe, zero-dependency library for asynchronous and concurrent programming in Scala.
Homepage: https://zio.dev/
Questions tagged [zio]
241 questions
5
votes
1 answer
Zio run blocking backwardscompatible code
(Hopefully) simple question on Scalaz Zio.
I have some old code that I refactored to Zio. I want one path of that code to keep behaving exactly as it was:
synchronous
blocking
on the current thread (this is a hard requirement)
How can I run an…
Lodewijk Bogaards
- 19,777
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5
votes
2 answers
Scalajs & scala ZIO
Does scala.js work with scala ZIO?
I'm looking to use scala ZIO with scala.js I only know how to use scala ZIO in normal apps does anyone know how to use it with scala.js?
NaseemMahasneh
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4
votes
2 answers
zio-http (ZIO 2.x) application not starting with Scala 3
I have this simple application:
import zhttp.http.*
import zhttp.http.Method.GET
import zhttp.service.Server
import zio.*
object HexAppApplication extends ZIOAppDefault {
// Create HTTP route
val app: HttpApp[Any, Nothing] =…
codependent
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4
votes
0 answers
How can i build batch the request and understand the response with help ZStream (ZIO)?
I have api that gets such request:
case class UsersRequest(ids: List[Long])
and returns such response:
case class UsersInfoResponse(info: List[Info])
case class Info(userId: Long, info: String)
also, i have methods that send this request and…
Vlad
- 41
- 1
4
votes
2 answers
How do I assert that an Option contains something in zio-test?
I tried
assert(anOption)(contains("x"))
But that only works for Iterables such as List or Seq.
Thilo
- 257,207
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4
votes
2 answers
Integration testing an HTTP server with ZIO test suite
I am trying to figure out the idiom for writing an integration test for an Http4s app that supports two end points.
I'm starting the Main app class in a ZManaged by forking it on a new fiber and then doing interruptFork on release of the ZManaged.
I…
arinray
- 178
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4
votes
1 answer
Building a ZIO and http4s app, works with sbt, fails with Bazel: missing an implicit
I'm attempting to build a service that integrates ZIO and http4s.
The starting point is this example (it uses zio 1.0.1, http4s 0.21.3, scala 2.12.11)
I was able to build the code below without any problems using sbt, but am running into trouble…
Shastick
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4
votes
1 answer
What do parameters to throttleShape mean?
zio-streams provides throttleShape which
/**
* Delays the chunks of this stream according to the given bandwidth parameters using the token bucket
* algorithm. Allows for burst in the processing of elements by allowing the token bucket to…
Mario Galic
- 47,285
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4
votes
1 answer
How to ignore a Suite or a Test in ZIO Test?
I could not find anything on how to ignore a Suite or a Test with ZIO Test.
Whether in an example nor in the documentation (https://zio.dev/docs/usecases/usecases_testing)
There is an ignored in the test package object:
/**
* Creates an ignored…
pme
- 14,156
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4
votes
2 answers
How can I implement loops that don't use potentially very large amounts of heapspace in ZIO
I know that ZIO is maintains its own stack, namely zio.internal.FiberContext#stack, which protects recursive functions like
def getNameFromUser(askForName: UIO[String]): UIO[String] =
for {
resp <- askForName
name <- if (resp.isEmpty)…
Matthias Langer
- 994
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- 22
4
votes
1 answer
Scala ZIO.bracket: handling errors of releasing resource
I want to create a directory, then do something with the directory and finally delete it. I'm using a bracket idiom for that.
val fs: FileSystem = ???
val path = ???
ZIO.bracket[Any, Throwable, Path, Unit](
acquire = ZIO{fs.mkdirs(path); path},
…
simpadjo
- 3,947
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4
votes
2 answers
ZIO : How to compute only once?
I am using ZIO: https://github.com/zio/zio
in my build.sbt:
"dev.zio" %% "zio" % "1.0.0-RC9"
No matter what I tried, my results are always being computed each time I need them:
val t = Task {
println(s"Compute")
12
}
val r = unsafeRun(for…
Wonay
- 1,160
- 13
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3
votes
0 answers
How to merge two stream and sort them in zio streams
Like akka-stream's mergeSorted.
It's very useful when process history data and keep the time order.
What's the replacement in zio-streams?
Lin Lee
- 213
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- 8
3
votes
2 answers
Collect all of the successes and failures of a sequence of ZIOs together?
I have a bunch of IOs, all of which may have either succeeded or failed:
val result: Seq[IO[MyFailure, MySuccess]] = ...
I need to summarize the results such that I can examine all the failures and all the successes together:
case class…
Cory Klein
- 51,188
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3
votes
2 answers
How can I encode None to missing json field using zio-json instead of null?
Let's say I have a case class with the optional field nickName and codec like this:
final case class Person(name: String, nickName: Option[String])
object Person {
implicit val personCodec: JsonCodec[Person] = DeriveJsonCodec.gen
}
I want to…
mkUltra
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