如何在Scala 3中使用akka ?

Question

如何在Scala 3中使用akka ?我不能找到akka依赖，而使用scala 3

sbt errors:

[error]   not found: /Users/admin/.ivy2/localcom.typesafe.akka/akka-actor-typed_3/2.6.15/ivys/ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/akka/akka-actor-typed_3/2.6.15/akka-actor-typed_3-2.6.15.pom
[error] (ssExtractDependencies) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.akka:akka-actor-typed_3:2.6.15
[error]   Not found
[error]   Not found
[error]   not found: /Users/admin/.ivy2/localcom.typesafe.akka/akka-actor-typed_3/2.6.15/ivys/ivy.xml
[error]   not found: https://repo1.maven.org/maven2/com/typesafe/akka/akka-actor-typed_3/2.6.15/akka-actor-typed_3-2.6.15.pom

Answer 1

akka-actor-typed是针对Scala 2.12, 2.13发布的，不针对Scala 3

https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor-typed

尝试兼容模式

lazy val foo = project.in(file("foo"))
.settings(
scalaVersion := "3.0.0",
libraryDependencies += 
("com.typesafe.akka" %% "akka-actor-typed" % "2.6.15")
.cross(CrossVersion.for3Use2_13)
)

https://docs.scala-lang.org/scala3/guides/migration/compatibility-classpath.html

---

更新。akka-actor-typed从2.6.17版本开始为Scala 3发布

libraryDependencies += "com.typesafe.akka" %% "akka-actor-typed" % "2.6.17"

Answer 2

为了在Scala 3中使用akka，例如akka-actor-typed，您可以将akka-actor-typed 2.6.18作为依赖项。

提供的示例使用akka-actor类型的2.6.15，其目标是scala 2.13和2.12。
Scala 3仅从akka-actor-typed 2.6.17开始作为目标包含。

包含scala 3作为目标的akka-actor-typed最新版本是akka-actor-typed 2.6.18。