enable scala3 build for more google connectors (#165)

* enable scala3 build for more google connectors

* implicits

* disable part of scala3 build

* try full build again

* Update GooglePubSub.scala

* refactor suggested by @mdedetrich

* remove interim variables

* add comments

* Update GooglePubSub.scala

google-cloud-pub-sub-grpc/src/main/scala/org/apache/pekko/stream/connectors/googlecloud/pubsub/grpc/javadsl/GooglePubSub.scala

@@ -69,7 +69,11 @@ object GooglePubSub {
                 Source
                   .tick(Duration.ZERO, pollInterval, subsequentRequest)
                   .mapMaterializedValue(cancellable.complete(_))))
-          .mapConcat(_.getReceivedMessagesList)
+          .mapConcat(
+            // TODO uptake any fix suggested for https://contributors.scala-lang.org/t/better-type-inference-for-scala-send-us-your-problematic-cases/2410/183
+            ((response: StreamingPullResponse) =>
+                  response.getReceivedMessagesList): pekko.japi.function.Function[StreamingPullResponse,
+              java.util.List[ReceivedMessage]])
           .mapMaterializedValue(_ => cancellable)
       }
       .mapMaterializedValue(flattenCs(_))
@@ -95,7 +99,11 @@ object GooglePubSub {
         Source
           .tick(Duration.ZERO, pollInterval, request)
           .mapAsync(1, client.pull(_))
-          .mapConcat(_.getReceivedMessagesList)
+          .mapConcat(
+            // TODO uptake any fix suggested for https://contributors.scala-lang.org/t/better-type-inference-for-scala-send-us-your-problematic-cases/2410/183
+            ((response: PullResponse) =>
+                  response.getReceivedMessagesList): pekko.japi.function.Function[PullResponse,
+              java.util.List[ReceivedMessage]])
           .mapMaterializedValue(cancellable.complete(_))
           .mapMaterializedValue(_ => cancellable)
       }

google-cloud-pub-sub-grpc/src/main/scala/org/apache/pekko/stream/connectors/googlecloud/pubsub/grpc/javadsl/GrpcPublisher.scala

@@ -74,7 +74,7 @@ object GrpcPublisher {
  * An extension that manages a single gRPC java publisher client per actor system.
  */
 final class GrpcPublisherExt private (sys: ExtendedActorSystem) extends Extension {
-  implicit val publisher = GrpcPublisher.create(sys)
+  implicit val publisher: GrpcPublisher = GrpcPublisher.create(sys)
 }
 
 object GrpcPublisherExt extends ExtensionId[GrpcPublisherExt] with ExtensionIdProvider {

google-cloud-pub-sub-grpc/src/main/scala/org/apache/pekko/stream/connectors/googlecloud/pubsub/grpc/javadsl/GrpcSubscriber.scala

@@ -75,7 +75,7 @@ object GrpcSubscriber {
  * An extension that manages a single gRPC java subscriber client per actor system.
  */
 final class GrpcSubscriberExt private (sys: ExtendedActorSystem) extends Extension {
-  implicit val subscriber = GrpcSubscriber.create(sys)
+  implicit val subscriber: GrpcSubscriber = GrpcSubscriber.create(sys)
 }
 
 object GrpcSubscriberExt extends ExtensionId[GrpcSubscriberExt] with ExtensionIdProvider {

google-cloud-pub-sub-grpc/src/main/scala/org/apache/pekko/stream/connectors/googlecloud/pubsub/grpc/scaladsl/GrpcPublisher.scala

@@ -65,7 +65,7 @@ object GrpcPublisher {
  * An extension that manages a single gRPC scala publisher client per actor system.
  */
 final class GrpcPublisherExt private (sys: ExtendedActorSystem) extends Extension {
-  implicit val publisher = GrpcPublisher(sys: ActorSystem)
+  implicit val publisher: GrpcPublisher = GrpcPublisher(sys: ActorSystem)
 }
 
 object GrpcPublisherExt extends ExtensionId[GrpcPublisherExt] with ExtensionIdProvider {

google-cloud-pub-sub-grpc/src/main/scala/org/apache/pekko/stream/connectors/googlecloud/pubsub/grpc/scaladsl/GrpcSubscriber.scala

@@ -65,7 +65,7 @@ object GrpcSubscriber {
  * An extension that manages a single gRPC scala subscriber client per actor system.
  */
 final class GrpcSubscriberExt private (sys: ExtendedActorSystem) extends Extension {
-  implicit val subscriber = GrpcSubscriber(sys: ActorSystem)
+  implicit val subscriber: GrpcSubscriber = GrpcSubscriber(sys: ActorSystem)
 }
 
 object GrpcSubscriberExt extends ExtensionId[GrpcSubscriberExt] with ExtensionIdProvider {

google-cloud-pub-sub-grpc/src/test/scala/docs/scaladsl/IntegrationSpec.scala

@@ -52,7 +52,7 @@ class IntegrationSpec
 
   implicit val system: ActorSystem = ActorSystem("IntegrationSpec")
 
-  implicit val defaultPatience = PatienceConfig(timeout = 15.seconds, interval = 50.millis)
+  implicit val defaultPatience: PatienceConfig = PatienceConfig(timeout = 15.seconds, interval = 50.millis)
 
   "connector" should {
 

google-common/src/main/scala/org/apache/pekko/stream/connectors/google/ResumableUpload.scala

@@ -14,7 +14,6 @@
 package org.apache.pekko.stream.connectors.google
 
 import org.apache.pekko
-import pekko.actor.ActorSystem
 import pekko.NotUsed
 import pekko.annotation.InternalApi
 import pekko.http.scaladsl.model.HttpMethods.{ POST, PUT }

project/Dependencies.scala

@@ -217,7 +217,6 @@ object Dependencies {
       "io.specto" % "hoverfly-java" % hoverflyVersion % Test // ApacheV2
     ) ++ Mockito)
   val GoogleBigQueryStorage = Seq(
-    crossScalaVersions -= Scala3,
     // see Pekko gRPC version in plugins.sbt
     libraryDependencies ++= Seq(
       // https://github.com/googleapis/java-bigquerystorage/tree/master/proto-google-cloud-bigquerystorage-v1
@@ -240,7 +239,6 @@ object Dependencies {
     ) ++ Mockito)
 
   val GooglePubSubGrpc = Seq(
-    crossScalaVersions -= Scala3,
     // see Pekko gRPC version in plugins.sbt
     libraryDependencies ++= Seq(
       // https://github.com/googleapis/java-pubsub/tree/master/proto-google-cloud-pubsub-v1/