refactor: Simplify ActorSystem layer

integration/src/test/scala/org/knora/webapi/core/ActorSystemTest.scala

@@ -5,11 +5,9 @@
 
 package org.knora.webapi.core
 
-import org.apache.pekko
+import org.apache.pekko.actor.ActorSystem
 import zio.*
 
 object ActorSystemTest {
-
-  def layer(sys: pekko.actor.ActorSystem): ZLayer[Any, Nothing, ActorSystem] =
-    ZLayer.scoped(ZIO.succeed(new ActorSystem { override val system: pekko.actor.ActorSystem = sys }))
+  def layer(sys: ActorSystem): ZLayer[Any, Nothing, ActorSystem] = ZLayer.succeed(sys)
 }

integration/src/test/scala/org/knora/webapi/core/LayersTest.scala

@@ -85,7 +85,11 @@ object LayersTest {
     with DspIngestTestContainer
     with SharedVolumes.Images
 
-  type CommonR0 = ActorSystem with AppConfigurationsTest with JwtService with SipiService with StringFormatter
+  type CommonR0 = pekko.actor.ActorSystem
+    with AppConfigurationsTest
+    with JwtService
+    with SipiService
+    with StringFormatter
   type CommonR =
     ApiRoutes
       with AdminApiEndpoints

integration/src/test/scala/org/knora/webapi/testservices/TestClientService.scala

@@ -19,6 +19,7 @@ import org.apache.http.impl.client.HttpClients
 import org.apache.http.impl.conn.PoolingHttpClientConnectionManager
 import org.apache.http.util.EntityUtils
 import org.apache.pekko
+import org.apache.pekko.actor.ActorSystem
 import spray.json.JsObject
 import spray.json.*
 import zio.*
@@ -33,7 +34,6 @@ import dsp.errors.AssertionException
 import dsp.errors.BadRequestException
 import dsp.errors.NotFoundException
 import org.knora.webapi.config.AppConfig
-import org.knora.webapi.core.ActorSystem
 import org.knora.webapi.messages.store.sipimessages.SipiUploadResponse
 import org.knora.webapi.messages.store.sipimessages.SipiUploadResponseJsonProtocol.*
 import org.knora.webapi.messages.store.sipimessages.SipiUploadWithoutProcessingResponse
@@ -65,11 +65,10 @@ final case class FileToUpload(path: Path, mimeType: ContentType)
  */
 final case class InputFile(fileToUpload: FileToUpload, width: Int, height: Int)
 
-final case class TestClientService(config: AppConfig, httpClient: CloseableHttpClient, sys: pekko.actor.ActorSystem)
+final case class TestClientService(config: AppConfig, httpClient: CloseableHttpClient)(implicit system: ActorSystem)
     extends TriplestoreJsonProtocol
     with RequestBuilding {
 
-  implicit val system: pekko.actor.ActorSystem    = sys
   implicit val executionContext: ExecutionContext = system.dispatchers.lookup(KnoraDispatchers.KnoraBlockingDispatcher)
 
   case class TestClientTimeoutException(msg: String) extends Exception
@@ -356,7 +355,7 @@ object TestClientService {
   /**
    * Releases the httpClient, freeing all resources.
    */
-  private def release(httpClient: CloseableHttpClient)(implicit system: pekko.actor.ActorSystem) = ZIO.attemptBlocking {
+  private def release(httpClient: CloseableHttpClient)(implicit system: ActorSystem) = ZIO.attemptBlocking {
     pekko.http.scaladsl.Http().shutdownAllConnectionPools()
     httpClient.close()
   }.tap(_ => ZIO.logDebug(">>> Release Test Client Service <<<")).orDie
@@ -366,8 +365,8 @@ object TestClientService {
       for {
         sys        <- ZIO.service[ActorSystem]
         config     <- ZIO.service[AppConfig]
-        httpClient <- ZIO.acquireRelease(acquire)(release(_)(sys.system))
-      } yield TestClientService(config, httpClient, sys.system)
+        httpClient <- ZIO.acquireRelease(acquire)(release(_)(sys))
+      } yield TestClientService(config, httpClient)(sys)
     }
 
 }

webapi/src/main/scala/org/knora/webapi/core/ActorSystem.scala

@@ -5,47 +5,27 @@
 
 package org.knora.webapi.core
 
-import org.apache.pekko
+import org.apache.pekko.actor
 import zio.*
-import zio.macros.accessible
 
 import scala.concurrent.ExecutionContext
 
-import pekko.actor
-
-@accessible
-trait ActorSystem {
-  val system: pekko.actor.ActorSystem
-}
-
 object ActorSystem {
 
   private def acquire(executionContext: ExecutionContext): URIO[Any, actor.ActorSystem] =
     ZIO
-      .attempt(
-        pekko.actor.ActorSystem(
-          name = "webapi",
-          config = None,
-          classLoader = None,
-          defaultExecutionContext = Some(executionContext),
-        ),
-      )
+      .attempt(actor.ActorSystem("webapi", None, None, Some(executionContext)))
       .zipLeft(ZIO.logInfo(">>> Acquire Actor System <<<"))
       .orDie
 
-  private def release(system: pekko.actor.ActorSystem): URIO[Any, actor.Terminated] =
-    ZIO
-      .fromFuture(_ => system.terminate())
-      .zipLeft(ZIO.logInfo(">>> Release Actor System <<<"))
-      .orDie
+  private def release(system: actor.ActorSystem): URIO[Any, actor.Terminated] =
+    ZIO.fromFuture(_ => system.terminate()).zipLeft(ZIO.logInfo(">>> Release Actor System <<<")).orDie
 
-  val layer: ZLayer[Any, Nothing, ActorSystem] =
-    ZLayer.scoped {
+  val layer: ZLayer[Any, Nothing, actor.ActorSystem] =
+    ZLayer.scoped(
       for {
-        context     <- ZIO.executor.map(_.asExecutionContext)
-        actorSystem <- ZIO.acquireRelease(acquire(context))(release)
-      } yield new ActorSystem {
-        override val system: pekko.actor.ActorSystem = actorSystem
-      }
-    }
+        context <- ZIO.executor.map(_.asExecutionContext)
+        system  <- ZIO.acquireRelease(acquire(context))(release)
+      } yield system,
+    )
 }

webapi/src/main/scala/org/knora/webapi/core/AppRouter.scala

@@ -32,22 +32,22 @@
 
 object AppRouter {
   val layer: ZLayer[
-    core.ActorSystem & CardinalityHandler & CardinalityService & ConstructResponseUtilV2 & MessageRelay &
+    pekko.actor.ActorSystem & CardinalityHandler & CardinalityService & ConstructResponseUtilV2 & MessageRelay &
       OntologyCache & OntologyHelpers & OntologyRepo & PermissionUtilADM & ResourceUtilV2 & StandoffTagUtilV2,
     Nothing,
     AppRouter,
   ] =
     ZLayer {
       for {
-        as           <- ZIO.service[core.ActorSystem]
+        as           <- ZIO.service[pekko.actor.ActorSystem]
         messageRelay <- ZIO.service[MessageRelay]
         runtime <-
           ZIO.runtime[
             CardinalityHandler & CardinalityService & ConstructResponseUtilV2 & OntologyCache & OntologyHelpers &
               OntologyRepo & PermissionUtilADM & ResourceUtilV2 & StandoffTagUtilV2,
           ]
       } yield new AppRouter {
-        implicit val system: org.apache.pekko.actor.ActorSystem = as.system
+        implicit val system: org.apache.pekko.actor.ActorSystem = as
 
         val ref: ActorRef = system.actorOf(
           Props(

webapi/src/main/scala/org/knora/webapi/core/AppServer.scala

@@ -5,6 +5,7 @@
 
 package org.knora.webapi.core
 
+import org.apache.pekko.actor
 import zio.*
 
 import org.knora.webapi.config.AppConfig
@@ -26,7 +27,7 @@
   state: State,
   ts: TriplestoreService,
   ru: RepositoryUpdater,
-  as: ActorSystem,
+  as: actor.ActorSystem,
   ontologyCache: OntologyCache,
   sipiService: SipiService,
   hs: HttpServer,
@@ -136,7 +137,7 @@
 object AppServer {
 
   private type AppServerEnvironment =
-    State & TriplestoreService & RepositoryUpdater & ActorSystem & OntologyCache & SipiService & HttpServer & AppConfig
+    State & TriplestoreService & RepositoryUpdater & actor.ActorSystem & OntologyCache & SipiService & HttpServer & AppConfig
 
   /**
    * Initializes the AppServer instance with the required services
@@ -146,7 +147,7 @@
       state    <- ZIO.service[State]
       ts       <- ZIO.service[TriplestoreService]
       ru       <- ZIO.service[RepositoryUpdater]
-      as       <- ZIO.service[ActorSystem]
+      as       <- ZIO.service[actor.ActorSystem]
       oc       <- ZIO.service[OntologyCache]
       iiifs    <- ZIO.service[SipiService]
       hs       <- ZIO.service[HttpServer]

webapi/src/main/scala/org/knora/webapi/core/HttpServer.scala

@@ -5,15 +5,13 @@
 
 package org.knora.webapi.core
 
-import org.apache.pekko
+import org.apache.pekko.actor.ActorSystem
+import org.apache.pekko.http.scaladsl.Http
 import zio.*
 
 import org.knora.webapi.config.AppConfig
-import org.knora.webapi.core
 import org.knora.webapi.routing.ApiRoutes
 
-import pekko.http.scaladsl.Http
-
 /**
  * The Akka based HTTP server
  */
@@ -25,11 +23,11 @@
   val layer: ZLayer[ActorSystem & AppConfig & ApiRoutes, Nothing, HttpServer] =
     ZLayer.scoped {
       for {
-        as        <- ZIO.service[core.ActorSystem]
+        as        <- ZIO.service[ActorSystem]
         config    <- ZIO.service[AppConfig]
         apiRoutes <- ZIO.service[ApiRoutes]
         binding <- {
-          implicit val system: pekko.actor.ActorSystem = as.system
+          implicit val system: ActorSystem = as
 
           ZIO.acquireRelease {
             ZIO

webapi/src/main/scala/org/knora/webapi/core/LayersLive.scala

@@ -5,6 +5,7 @@
 
 package org.knora.webapi.core
 
+import org.apache.pekko.actor.ActorSystem
 import zio.ULayer
 import zio.ZLayer
 
@@ -93,7 +94,7 @@ object LayersLive {
    */
   val dspLayersLive: ULayer[DspEnvironmentLive] =
     ZLayer.make[DspEnvironmentLive](
-      ActorSystem.layer,
+      org.knora.webapi.core.ActorSystem.layer,
       AdminApiEndpoints.layer,
       AdminApiRoutes.layer,
       ApiRoutes.layer,

webapi/src/main/scala/org/knora/webapi/routing/ApiRoutes.scala

@@ -5,7 +5,7 @@
 
 package org.knora.webapi.routing
 
-import org.apache.pekko.actor
+import org.apache.pekko.actor.ActorSystem
 import org.apache.pekko.http.cors.scaladsl.CorsDirectives
 import org.apache.pekko.http.cors.scaladsl.settings.CorsSettings
 import org.apache.pekko.http.scaladsl.model.HttpMethods.*
@@ -15,7 +15,6 @@
 
 import org.knora.webapi.config.AppConfig
 import org.knora.webapi.core
-import org.knora.webapi.core.ActorSystem
 import org.knora.webapi.core.AppRouter
 import org.knora.webapi.core.MessageRelay
 import org.knora.webapi.http.directives.DSPApiDirectives
@@ -61,7 +60,7 @@
         resourceInfoRoutes <- ZIO.service[ResourceInfoRoutes]
         searchApiRoutes    <- ZIO.service[SearchApiRoutes]
         managementRoutes   <- ZIO.service[ManagementRoutes]
-        routeData          <- ZIO.succeed(KnoraRouteData(sys.system, router.ref, appConfig))
+        routeData          <- ZIO.succeed(KnoraRouteData(sys, router.ref, appConfig))
         runtime <-
           ZIO.runtime[
             AppConfig & AuthorizationRestService & core.State & IriConverter & KnoraProjectRepo & MessageRelay & ProjectADMRestService & RestCardinalityService & RestResourceInfoService & routing.Authenticator & SearchApiRoutes & SearchResponderV2 & SipiService & StringFormatter & UserService & ValuesResponderV2,
@@ -98,7 +97,7 @@
 ) extends ApiRoutes
     with AroundDirectives {
 
-  private implicit val system: actor.ActorSystem = routeData.system
+  private implicit val system: ActorSystem = routeData.system
 
   val routes: Route =
     logDuration {

webapi/src/main/scala/org/knora/webapi/slice/common/api/TapirToPekkoInterpreter.scala

@@ -5,6 +5,7 @@
 
 package org.knora.webapi.slice.common.api
 
+import org.apache.pekko.actor.ActorSystem
 import org.apache.pekko.http.scaladsl.server.Route
 import sttp.capabilities.WebSockets
 import sttp.capabilities.pekko.PekkoStreams
@@ -22,10 +23,8 @@
 import scala.concurrent.ExecutionContext
 import scala.concurrent.Future
 
-import org.knora.webapi.core.ActorSystem
-
-final case class TapirToPekkoInterpreter()(actorSystem: ActorSystem) {
-  implicit val executionContext: ExecutionContext = actorSystem.system.dispatcher
+final case class TapirToPekkoInterpreter()(system: ActorSystem) {
+  implicit val executionContext: ExecutionContext = system.dispatcher
   private case class GenericErrorResponse(error: String)
   private object GenericErrorResponse {
     implicit val codec: JsonCodec[GenericErrorResponse] = DeriveJsonCodec.gen[GenericErrorResponse]