feat: Access to component gRPC clients in actions and workflows (#2296)

* feat: Access to component gRPC clients in actions and workflows

* formatting

Author: johanandren

sdk/java-sdk-protobuf/src/main/java/kalix/javasdk/action/ActionCreationContext.java

@@ -28,6 +28,13 @@ public interface ActionCreationContext extends Context {
    */
   <T> T getGrpcClient(Class<T> clientClass, String service);
 
+  /**
+   * Get an Akka gRPC client for the given component that is in the same service.
+   *
+   * <p>Lower level alternative to using the generated components. Prefer that when possible.
+   */
+  <T> T getComponentGrpcClient(Class<T> componentServiceClass);
+
   /**
    * Get an OpenTelemetry tracer for the current action. This will allow for building and automatic
    * exporting of spans.

sdk/java-sdk-protobuf/src/main/java/kalix/javasdk/workflow/WorkflowContext.java

@@ -26,4 +26,11 @@ public interface WorkflowContext extends Context {
    *     `akka.grpc.client.[service-name]` in `application.conf`.
    */
   <T> T getGrpcClient(Class<T> clientClass, String service);
+
+  /**
+   * Get an Akka gRPC client for the given component that is in the same service.
+   *
+   * <p>Lower level alternative to using the generated components. Prefer that when possible.
+   */
+  <T> T getComponentGrpcClient(Class<T> componentServiceClass);
 }

sdk/scala-sdk-protobuf/src/main/scala/kalix/scalasdk/action/ActionCreationContext.scala

@@ -23,6 +23,12 @@ trait ActionCreationContext extends Context {
    */
   def getGrpcClient[T](clientClass: Class[T], service: String): T
 
+  /**
+   * Get an Akka gRPC client for the given component that is in the same service. <p> Lower level alternative to using
+   * the generated components. Prefer that when possible.
+   */
+  def getComponentGrpcClient[T](componentServiceClass: Class[T]): T
+
   /**
    * Get an OpenTelemetry tracer for the current action. This will allow for building and automatic exporting of spans.
    *

sdk/scala-sdk-protobuf/src/main/scala/kalix/scalasdk/impl/action/ActionAdapters.scala

@@ -127,6 +127,9 @@ private[scalasdk] final case class ScalaActionCreationContextAdapter(
   override def getGrpcClient[T](clientClass: Class[T], service: String): T =
     javaSdkCreationContext.getGrpcClient(clientClass, service)
 
+  override def getComponentGrpcClient[T](componentServiceClass: Class[T]): T =
+    javaSdkCreationContext.getComponentGrpcClient(componentServiceClass)
+
   override def materializer(): Materializer = javaSdkCreationContext.materializer()
 
   override def getTracer: Tracer = javaSdkCreationContext.getTracer

sdk/scala-sdk-protobuf/src/main/scala/kalix/scalasdk/impl/workflow/WorkflowAdapters.scala

@@ -217,6 +217,9 @@ private[scalasdk] final class ScalaWorkflowContextAdapter(javaSdkContext: javasd
   override def getGrpcClient[T](clientClass: Class[T], service: String): T =
     javaSdkContext.getGrpcClient(clientClass, service)
 
+  override def getComponentGrpcClient[T](componentServiceClass: Class[T]): T =
+    javaSdkContext.getComponentGrpcClient(componentServiceClass)
+
   override def materializer(): Materializer = javaSdkContext.materializer()
 
   override def workflowId: String = javaSdkContext.workflowId()

sdk/scala-sdk-protobuf/src/main/scala/kalix/scalasdk/workflow/WorkflowContext.scala

@@ -30,4 +30,10 @@ trait WorkflowContext extends Context {
    */
   def getGrpcClient[T](clientClass: Class[T], service: String): T
 
+  /**
+   * Get an Akka gRPC client for the given component that is in the same service. <p> Lower level alternative to using
+   * the generated components. Prefer that when possible.
+   */
+  def getComponentGrpcClient[T](componentServiceClass: Class[T]): T
+
 }