gRPC Controllers
In Sword, a gRPC controller is a struct annotated with #[controller(kind = Controller::Grpc, ...)] that implements the trait generated by tonic.
Defining a Controller
rust
use sword::grpc::*;
use sword::prelude::*;
#[controller(kind = Controller::Grpc, service = UserGrpcServiceServer)]
pub struct UsersController;
#[sword::grpc::async_trait]
impl UserGrpcService for UsersController {
async fn list_users(
&self,
req: Request<ListUsersRequest>,
) -> GrpcResult<ListUsersReply> {
tracing::info!("ListUsers gRPC method called");
Ok(Response::new(ListUsersReply { users: vec![] }))
}
}The trait (UserGrpcService) is generated by tonic from a .proto file and must be imported to implement the controller.
Registering in a Module
rust
use sword::prelude::*;
pub struct UsersModule;
impl Module for UsersModule {
fn register_controllers(controllers: &ControllerRegistry) {
controllers.register::<UsersController>();
}
}