feature: update to support both scala 3 and scala 2.13

.github/workflows/release-publish.yml

@@ -3,6 +3,7 @@ name: Publish Package on Release
 on:
   release:
     types: [published]
+  workflow_dispatch:
 
 jobs:
   publish:
@@ -39,7 +40,12 @@ jobs:
           mkdir -p ~/.sbt/1.0
           echo "credentials += Credentials(\"GitHub Package Registry\", \"maven.pkg.github.com\", \"${{ github.actor }}\", \"${{ secrets.GITHUB_TOKEN }}\")" >> ~/.sbt/1.0/global.sbt
 
-      - name: Build and publish
-        run: sbt clean compile publish
+      - name: Build and publish for Scala 2.13
+        run: sbt ++2.13.12 clean compile publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and publish for Scala 3
+        run: sbt ++3.3.0 clean compile publish
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/scala.yml

@@ -1,15 +1,11 @@
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
 name: Scala CI
 
 on:
   push:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
+  workflow_dispatch:
 
 permissions:
   contents: read
@@ -23,17 +19,38 @@ jobs:
       pull-requests: write
       repository-projects: write
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK 11
-      uses: actions/setup-java@v3
-      with:
-        java-version: '11'
-        distribution: 'temurin'
-        cache: 'sbt'
-    - name: Run tests
-      run: sbt test
-      # Optional: This step uploads information to the GitHub dependency graph and unblocking Dependabot alerts for the repository
-    - name: Sbt Dependency Submission
-      uses: scalacenter/sbt-dependency-submission@v3.0.1
+      - uses: actions/checkout@v4
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'temurin'
+          cache: 'sbt'
+
+      - name: Cache sbt
+        uses: actions/cache@v2
+        with:
+          path: ~/.sbt
+          key: ${{ runner.os }}-sbt-${{ hashFiles('**/build.sbt') }}
+          restore-keys: |
+            ${{ runner.os }}-sbt-
+
+      - name: Cache Coursier
+        uses: actions/cache@v2
+        with:
+          path: ~/.coursier
+          key: ${{ runner.os }}-coursier-${{ hashFiles('**/build.sbt') }}
+          restore-keys: |
+            ${{ runner.os }}-coursier-
+
+      - name: Run tests for Scala 2.13
+        run: sbt ++2.13.12 clean compile test
+
+      - name: Run tests for Scala 3
+        run: sbt ++3.3.0 clean compile test
 
+      - name: Sbt Dependency Submission for Scala 2.13
+        uses: scalacenter/sbt-dependency-submission@v3.0.1
 
+      - name: Sbt Dependency Submission for Scala 3
+        uses: scalacenter/sbt-dependency-submission@v3.0.1

.gitignore

@@ -68,3 +68,5 @@ project/**/metals.sbt
 
 .bsp
 .history
+scala2/target
+scala3/target

README.md

@@ -88,7 +88,7 @@ Add the following to your `build.sbt`:
 ```scala
 resolvers += "jitpack" at "https://jitpack.io"
 
-libraryDependencies += "com.github.suprnation" % "cats-actors" % "2.0.0-RC1"
+libraryDependencies += "com.github.suprnation" &% "cats-actors" % "2.0.0-RC2"
 ```
 
 #### Using Maven
@@ -110,6 +110,8 @@ Add the following to your `pom.xml`:
 <dependency>
     <groupId>com.github.suprnation</groupId>
     <artifactId>cats-actors_2.13</artifactId>
+    or
+    <artifactId>cats-actors_3</artifactId>
     <version>2.0.0-RC1</version>
 </dependency>
 ```

build.sbt

@@ -1,41 +1,68 @@
-ThisBuild / version := "2.0.0-RC1"
-
-ThisBuild / scalaVersion := "2.13.12"
-
-addCompilerPlugin("org.typelevel" % "kind-projector" % "0.13.2" cross CrossVersion.full)
-
 ThisBuild / organization := "com.suprnation"
 ThisBuild / name := "cats-actors"
+ThisBuild / version := "2.0.0-RC2"
+ThisBuild / organizationName := "SuprNation"
+ThisBuild / startYear := Some(2024)
+ThisBuild / licenses += ("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0.txt"))
 
-organizationName := "SuprNation"
-startYear := Some(2024)
-licenses += ("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0.txt"))
+ThisBuild / crossScalaVersions := Seq("2.13.12", "3.3.0")
+ThisBuild / scalaVersion := crossScalaVersions.value.head
 
-Test / parallelExecution := false
+lazy val commonSettings = Seq(
+  Test / parallelExecution := false,
+  libraryDependencies ++= Seq(
+    "org.typelevel" %% "cats-effect" % "3.5.2",
+    "org.scalatest" %% "scalatest" % "3.2.19" % Test
+  ),
+  publishTo := {
+    val owner = "suprnation"
+    val repo = "cats-actors"
+    if (isSnapshot.value)
+      Some("GitHub Package Registry".at(s"https://maven.pkg.github.com/$owner/$repo"))
+    else
+      Some("GitHub Package Registry".at(s"https://maven.pkg.github.com/$owner/$repo"))
+  }
+
+)
 
-scalacOptions ++= Seq( // use ++= to add to existing options
-  "-deprecation",
-  "-encoding",
-  "utf8", // if an option takes an arg, supply it on the same line
-  "-feature", // then put the next option on a new line for easy editing
-  "-language:implicitConversions",
-  "-language:existentials",
-  "-unchecked",
-  "-Werror",
-  "-Xlint" // exploit "trailing comma" syntax so you can add an option without editing this line
+lazy val scala2Settings = Seq(
+  libraryDependencies += "org.typelevel" %% "kind-projector" % "0.13.2" cross CrossVersion.full,
+  scalacOptions ++= Seq(
+    "-language:implicitConversions",
+    "-language:existentials"
+  )
 )
 
-libraryDependencies ++= Seq(
-  "org.typelevel" %% "cats-effect" % "3.5.2", // if needed for other dependencies
-  "org.typelevel" %% "cats-effect" % "3.5.0",
-  "org.scalatest" %% "scalatest" % "3.2.18" % Test
+lazy val scala3Settings = Seq(
+  // Scala 3 specific settings can be added here
 )
 
-publishTo := {
-  val owner = "suprnation"
-  val repo = "cats-actors"
-  if (isSnapshot.value)
-    Some("GitHub Package Registry".at(s"https://maven.pkg.github.com/$owner/$repo"))
-  else
-    Some("GitHub Package Registry".at(s"https://maven.pkg.github.com/$owner/$repo"))
-}
+lazy val root = (project in file("."))
+  .settings(commonSettings)
+  .settings(
+    name := "cats_actors",
+    // Conditionally apply settings based on Scala version
+    libraryDependencies ++= (scalaVersion.value match {
+      case v if v.startsWith("2.") => Seq("org.typelevel" %% "kind-projector" % "0.13.2" cross CrossVersion.full)
+      case _ => Seq()
+    }),
+    scalacOptions ++= (scalaVersion.value match {
+      case v if v.startsWith("2.") => Seq(
+        "-deprecation",
+        "-encoding", "utf8",
+        "-feature",
+        "-unchecked",
+        "-Werror",
+        "-language:implicitConversions",
+        "-language:existentials",
+        "-Xlint"
+    )
+      case _ => Seq()
+    }),
+    Compile / unmanagedSourceDirectories ++= Seq(
+      baseDirectory.value / "src" / "main" / "scala"
+    ),
+    Test / unmanagedSourceDirectories ++= Seq(
+      baseDirectory.value / "src" / "test" / "scala"
+    )
+  )

src/main/scala/com/suprnation/EscalatingReplyingActor.scala

@@ -17,8 +17,8 @@
 package com.suprnation
 
 import cats.Parallel
-import cats.effect.std.Console
-import cats.effect.{Async, Concurrent, Sync, Temporal}
+import cats.effect._
+import cats.effect.std._
 import cats.implicits._
 import com.suprnation.actor.Actor.ReplyingReceive
 import com.suprnation.actor.SupervisorStrategy.Escalate

src/main/scala/com/suprnation/actor/Actor.scala

@@ -67,7 +67,7 @@ object ReplyingActor {
   ): Actor[F, Request] =
     withReceive(Behaviour.ignoringBehaviour(name))
 
-  def withReceive[F[+_]: Parallel: Concurrent: Temporal, Request, Response](
+  private def withReceive[F[+_]: Parallel: Concurrent: Temporal, Request, Response](
       _receive: PartialFunction[Request, F[Response]]
   ): ReplyingActor[F, Request, Response] = new ReplyingActor[F, Request, Response] {
     override def receive: ReplyingReceive[F, Request, Response] = _receive
@@ -112,7 +112,7 @@ abstract class ReplyingActor[F[+_]: Concurrent: Parallel: Temporal, Request, Res
   // We do this because we do not want a Ref for the context to make the DX easier.
   // We also do not want a Ref on self to make the DX easier.
   implicit val context: ActorContext[F, Request, Response] = null
-  final val self: ReplyingActorRef[F, Request, Response] = null
+  val self: ReplyingActorRef[F, Request, Response] = null
   implicit def implicitSelf: Option[ReplyingActorRef[F, Request, Response]] = Option(self)
 
   def init: F[Unit] = Concurrent[F].unit
@@ -149,7 +149,8 @@ abstract class ReplyingActor[F[+_]: Concurrent: Parallel: Temporal, Request, Res
   /** User overridable callback. <p/> Is called when a message isn't handled by the current behaviour of the actor by default it fails with either [[com.suprnation.actor.DeathPactException]] (in case of an unhandled [[com.suprnation.actor.Terminated]] message) or publishes an [[com.suprnation.actor.UnhandledMessage]] to the actor system's event stream.
     */
   def unhandled(message: Any): F[Any] = message match {
-    case Terminated(dead, _) => MonadThrow[F].raiseError(DeathPactException(dead))
+    case Terminated(dead, _) =>
+      MonadThrow[F].raiseError(DeathPactException[F](dead.asInstanceOf[NoSendActorRef[F]]))
     case _ =>
       context.system.eventStream
         .offer(UnhandledMessage(message, context.sender, self).toString)

src/main/scala/com/suprnation/actor/ActorContext.scala

@@ -79,10 +79,6 @@ object ActorContext {
         // Here we will call the parent to handle this..
         _self match {
           case local: InternalActorRef[F, ?, ?] => local.stop
-          case unexpected =>
-            MonadThrow[F].raiseError(
-              new IllegalArgumentException(s"ActorRef is not internal: $unexpected")
-            )
         }
       } else {
         Concurrent[F].raiseError(
@@ -97,41 +93,26 @@ object ActorContext {
       self match {
         case local: InternalActorRef[F, ?, ?] =>
           local.assertCellActiveAndDo(_.watch(actorRef, onTerminated))
-        case unexpected =>
-          MonadThrow[F].raiseError(
-            new IllegalArgumentException(s"ActorRef is not internal: $unexpected")
-          ) // Done for completeness
       }
 
     def unwatch(actorRef: NoSendActorRef[F]): F[NoSendActorRef[F]] =
       self match {
         case local: InternalActorRef[F, ?, ?] =>
           local.assertCellActiveAndDo(_.unwatch(actorRef))
-        case unexpected =>
-          MonadThrow[F].raiseError(
-            new IllegalArgumentException(s"ActorRef is not internal: $unexpected")
-          ) // Done for completeness
       }
 
     override def setReceiveTimeout(timeout: FiniteDuration, onTimeout: => Request): F[Unit] =
       self match {
         case local: InternalActorRef[F, ?, ?] =>
           local.assertCellActiveAndDo(_.setReceiveTimeout(timeout, onTimeout))
-        case unexpected =>
-          MonadThrow[F].raiseError(
-            new IllegalArgumentException(s"ActorRef is not internal: $unexpected")
-          ) // Done for completeness
       }
 
     override val cancelReceiveTimeout: F[Unit] =
-      Temporal[F].delay(self).flatMap {
-        case local: InternalActorRef[F, ?, ?] =>
+      Temporal[F]
+        .delay(self)
+        .flatMap((local: InternalActorRef[F, ?, ?]) =>
           local.assertCellActiveAndDo(_.cancelReceiveTimeout)
-        case unexpected =>
-          MonadThrow[F].raiseError(
-            new IllegalArgumentException(s"ActorRef is not internal: $unexpected")
-          ) // Done for completeness
-      }
+        )
 
     override def replyingActorOf[ChildRequest, ChildResponse](
         props: F[ReplyingActor[F, ChildRequest, ChildResponse]],

src/main/scala/com/suprnation/actor/ChildStats.scala

@@ -51,8 +51,8 @@ final case class ChildRestartStats[F[+_]](
      */
     val retriesDone = maxNrOfRetriesCount + 1
     val now = System.nanoTime
-    val windowStart =
-      if (restartTimeWindowStartNanos == 0) {
+    val windowStart: Long =
+      if (restartTimeWindowStartNanos == 0L) {
         restartTimeWindowStartNanos = now
         now
       } else restartTimeWindowStartNanos

src/main/scala/com/suprnation/actor/Exceptions.scala

@@ -120,11 +120,11 @@ final case class PostRestartException[F[+_]](
 
 /** InvalidMessageException is thrown when an invalid message is sent to an Actor; Currently only `null` is an invalid message.
   */
-final case class InvalidMessageException private (message: String) extends AkkaException(message)
+final case class InvalidMessageException(message: String) extends AkkaException(message)
 
 /** A DeathPactException is thrown by an Actor that receives a Terminated(someActor) message that it doesn't handle itself, effectively crashing the Actor and escalating to the supervisor.
   */
-final case class DeathPactException[F[+_]] private (dead: NoSendActorRef[F])
+final case class DeathPactException[F[+_]](dead: NoSendActorRef[F])
     extends AkkaException("Monitored actor [" + dead + "] terminated")
     with NoStackTrace
 

src/main/scala/com/suprnation/actor/FiberActorRefProvider.scala

@@ -18,7 +18,7 @@ package com.suprnation.actor
 import cats.effect.std.{Console, Supervisor}
 import cats.effect.{Async, Deferred, Temporal}
 import cats.implicits._
-import cats.{Applicative, Parallel}
+import cats.Applicative
 import com.suprnation.actor.Actor.Actor
 import com.suprnation.actor.ActorRef.{ActorRef, NoSendActorRef}
 import com.suprnation.actor.engine.ActorCell
@@ -121,7 +121,7 @@ trait ActorRefProvider[F[+_]] {
   ): F[ReplyingActorRef[F, Request, Response]]
 }
 
-class LocalActorRefProvider[F[+_]: Parallel: Async: Temporal: Console](
+class LocalActorRefProvider[F[+_]: Async: Temporal: Console](
     supervisor: Supervisor[F],
     systemShutdownSignal: Deferred[F, Unit],
     system: ActorSystem[F],

src/main/scala/com/suprnation/actor/ReplyingActorRef.scala

@@ -19,7 +19,7 @@ package com.suprnation.actor
 import cats.effect._
 import cats.effect.std.{Console, Supervisor}
 import cats.syntax.all._
-import cats.{Monad, Parallel}
+import cats.Monad
 import com.suprnation.actor.ActorRef.{ActorRef, NoSendActorRef}
 import com.suprnation.actor.engine.ActorCell
 
@@ -170,7 +170,7 @@ trait ReplyingActorRef[F[+_], -Request, +Response] {
 }
 
 object InternalActorRef {
-  def apply[F[+_]: Parallel: Async: Temporal: Console, Request, Response](
+  def apply[F[+_]: Async: Temporal: Console, Request, Response](
       supervisor: Supervisor[F],
       systemShutdownSignal: Deferred[F, Unit],
       name: String,
@@ -204,7 +204,7 @@ object InternalActorRef {
     } yield localActorRef
 }
 
-case class InternalActorRef[F[+_]: Parallel: Async: Temporal: Console, Request, Response](
+case class InternalActorRef[F[+_]: Async: Temporal: Console, Request, Response](
     supervisor: Supervisor[F],
     systemShutdownSignal: Deferred[F, Unit],
     name: String,

src/main/scala/com/suprnation/actor/dungeon/Children.scala

@@ -16,7 +16,6 @@
 
 package com.suprnation.actor.dungeon
 
-import cats.Parallel
 import cats.effect.std.{Semaphore, Supervisor}
 import cats.effect.{Concurrent, Deferred, Ref}
 import cats.implicits._
@@ -47,9 +46,6 @@ object Children {
 
 trait Children[F[+_], Request, Response] {
   self: ActorCell[F, Request, Response] =>
-
-  implicit val parallelF: Parallel[F]
-  implicit val concurrentF: Concurrent[F]
   implicit val childrenContext: ChildrenContext[F]
 
   def resumeChildren(causedByFailure: Option[Throwable], perp: Option[NoSendActorRef[F]]): F[Unit] =