C++ worker API refactoring (#9053)

cpp/include/ray/api/actor_handle.h

@@ -0,0 +1,52 @@
+
+#pragma once
+
+#include "ray/core.h"
+
+namespace ray {
+namespace api {
+
+#include <ray/api/generated/actor_funcs.generated.h>
+
+/// A handle to an actor which can be used to invoke a remote actor method, with the
+/// `Call` method.
+/// \param ActorType The type of the concrete actor class.
+/// Note, the `Call` method is defined in actor_call.generated.h.
+template <typename ActorType>
+class ActorHandle {
+ public:
+  ActorHandle();
+
+  ActorHandle(const ActorID &id);
+
+  /// Get a untyped ID of the actor
+  const ActorID &ID() const;
+
+  /// Include the `Call` methods for calling remote functions.
+#include <ray/api/generated/actor_call.generated.h>
+
+  /// Make ActorHandle serializable
+  MSGPACK_DEFINE(id_);
+
+ private:
+  ActorID id_;
+};
+
+// ---------- implementation ----------
+
+template <typename ActorType>
+ActorHandle<ActorType>::ActorHandle() {}
+
+template <typename ActorType>
+ActorHandle<ActorType>::ActorHandle(const ActorID &id) {
+  id_ = id;
+}
+
+template <typename ActorType>
+const ActorID &ActorHandle<ActorType>::ID() const {
+  return id_;
+}
+
+#include <ray/api/generated/actor_call_impl.generated.h>
+}  // namespace api
+}  // namespace ray