[TOREE-554] Use Pekko instead of Akka (#222)

---------

Co-authored-by: Cheng Pan <[email protected]>

Author: pjfanning

build.sbt

@@ -203,7 +203,7 @@ enablePlugins(ScalaUnidocPlugin)
 (ScalaUnidoc / unidoc / scalacOptions) ++= Seq(
   "-Ymacro-expand:none",
   "-skip-packages", Seq(
-    "akka",
+    "org.apache.pekko",
     "scala"
   ).mkString(":"),
   "-no-link-warnings" // Suppresses problems with Scaladoc @throws links

client/build.sbt

@@ -19,7 +19,7 @@ scalacOptions += "-language:reflectiveCalls"
 
 // Main library dependencies to function
 libraryDependencies ++= Seq(
-  Dependencies.akkaActor,
-  Dependencies.akkaSlf4j,
-  Dependencies.akkaTestkit % "test"
+  Dependencies.pekkoActor,
+  Dependencies.pekkoSlf4j,
+  Dependencies.pekkoTestkit % "test"
 )

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/ActorLoader.scala

@@ -17,7 +17,7 @@
 
 package org.apache.toree.kernel.protocol.v5.client
 
-import akka.actor.{ActorRefFactory, ActorSelection}
+import org.apache.pekko.actor.{ActorRefFactory, ActorSelection}
 
 /**
  * This trait defines the interface for loading actors based on some value

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/SparkKernelClient.scala

@@ -17,9 +17,9 @@
 
 package org.apache.toree.kernel.protocol.v5.client
 
-import akka.actor.ActorSystem
-import akka.pattern.ask
-import akka.util.Timeout
+import org.apache.pekko.actor.ActorSystem
+import org.apache.pekko.pattern.ask
+import org.apache.pekko.util.Timeout
 import org.apache.toree.comm._
 import org.apache.toree.kernel.protocol.v5._
 import org.apache.toree.kernel.protocol.v5.client.execution.{DeferredExecution, ExecuteRequestTuple}

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/Utilities.scala

@@ -19,7 +19,7 @@ package org.apache.toree.kernel.protocol.v5.client
 
 import java.nio.charset.Charset
 
-import akka.util.{ByteString, Timeout}
+import org.apache.pekko.util.{ByteString, Timeout}
 import org.apache.toree.communication.ZMQMessage
 import org.apache.toree.kernel.protocol.v5._
 import org.apache.toree.kernel.protocol.v5.content.ExecuteRequest

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/boot/ClientBootstrap.scala

@@ -17,7 +17,7 @@
 
 package org.apache.toree.kernel.protocol.v5.client.boot
 
-import akka.actor.ActorSystem
+import org.apache.pekko.actor.ActorSystem
 import org.apache.toree.comm.{CommRegistrar, CommStorage}
 import org.apache.toree.kernel.protocol.v5.client.boot.layers._
 import org.apache.toree.kernel.protocol.v5.client.socket.{SocketConfig, SocketFactory}

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/boot/layers/HandlerInitialization.scala

@@ -17,7 +17,7 @@
 
 package org.apache.toree.kernel.protocol.v5.client.boot.layers
 
-import akka.actor.{ActorSystem, Props}
+import org.apache.pekko.actor.{ActorSystem, Props}
 import org.apache.toree.kernel.protocol.v5.client.ActorLoader
 import org.apache.toree.kernel.protocol.v5.MessageType
 import org.apache.toree.kernel.protocol.v5.MessageType.MessageType

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/boot/layers/SystemInitialization.scala

@@ -17,7 +17,7 @@
 
 package org.apache.toree.kernel.protocol.v5.client.boot.layers
 
-import akka.actor.{Props, ActorRef, ActorSystem}
+import org.apache.pekko.actor.{Props, ActorRef, ActorSystem}
 import org.apache.toree.comm.{CommRegistrar, CommStorage}
 import org.apache.toree.communication.security.{SecurityActorType, SignatureManagerActor}
 import org.apache.toree.kernel.protocol.v5.SocketType

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/handler/ExecuteHandler.scala

@@ -17,8 +17,8 @@
 
 package org.apache.toree.kernel.protocol.v5.client.handler
 
-import akka.actor.Actor
-import akka.util.Timeout
+import org.apache.pekko.actor.Actor
+import org.apache.pekko.util.Timeout
 import org.apache.toree.kernel.protocol.v5._
 import org.apache.toree.kernel.protocol.v5.client.{ActorLoader, Utilities}
 import org.apache.toree.kernel.protocol.v5.client.execution.{ExecuteRequestTuple, DeferredExecutionManager}

client/src/main/scala/org/apache/toree/kernel/protocol/v5/client/socket/HeartbeatClient.scala

@@ -17,10 +17,10 @@
 
 package org.apache.toree.kernel.protocol.v5.client.socket
 
-import akka.actor.{ActorRef, Actor}
-import akka.util.{ByteString, Timeout}
+import org.apache.pekko.actor.{ActorRef, Actor}
+import org.apache.pekko.util.{ByteString, Timeout}
 import org.apache.toree.communication.ZMQMessage
-import akka.pattern.ask
+import org.apache.pekko.pattern.ask
 import org.apache.toree.kernel.protocol.v5.client.ActorLoader
 import org.apache.toree.utils.LogLike
 import org.apache.toree.kernel.protocol.v5.UUID