Broken Example Code Due to Missing Module in crates.io Version

[arthurgubaidullin]

Bug Report

Version

0.12.3

Platform

aarch64 GNU/Linux

Crates

https://crates.io/crates/tonic

Description

I tried running the example code from this repository, but it doesn't work because a required module is missing, and it isn't available in the version on crates.io. I spent hours troubleshooting and found that the latest release was in September 2024. It turns out that the examples are using a version that isn't from crates.io.

I expect the example code to be functional and up to date. The links in the documentation lead to non-working examples. Please update the examples or provide guidance on how to resolve the issue.

error[E0432]: unresolved import `tonic::service::LayerExt`
 --> experiments/grpc-server/src/main.rs:1:13
  |
1 | use tonic::{service::LayerExt as _, transport::Server, Request, Response, Status};
  |             ^^^^^^^^^^^^^^^^^^^^^^ no `LayerExt` in `service`

error[E0599]: no method named `named_layer` found for struct `Stack` in the current scope
  --> experiments/grpc-server/src/main.rs:42:10
   |
38 |       let greeter = tower::ServiceBuilder::new()
   |  ___________________-
39 | |         .layer(tower_http::cors::CorsLayer::new())
40 | |         .layer(tonic_web::GrpcWebLayer::new())
41 | |         .into_inner()
42 | |         .named_layer(GreeterServer::new(greeter));
   | |         -^^^^^^^^^^^ method not found in `Stack<GrpcWebLayer, Stack<CorsLayer, Identity>>`
   | |_________|
   |

Some errors have detailed explanations: E0432, E0599.
For more information about an error, try `rustc --explain E0432`.

Related PR: #1966