Create MVP of nRPC codegen
This commit is contained in:
commit
56ed5b6d31
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.gitignore
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.gitignore
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/target
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Cargo.lock
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Cargo.lock
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[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.42.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.48.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
|
||||
2
Cargo.toml
Normal file
2
Cargo.toml
Normal file
|
|
@ -0,0 +1,2 @@
|
|||
[workspace]
|
||||
members = [ "nrpc", "nrpc-*" ]
|
||||
6
README.md
Normal file
6
README.md
Normal file
|
|
@ -0,0 +1,6 @@
|
|||
[](https://crates.io/crates/nrpc)
|
||||
[](https://crates.io/crates/nrpc-build)
|
||||
|
||||
# nRPC
|
||||
|
||||
NG's custom spin of gRPC. Intended to be decoupled from the network layer for use with websockets.
|
||||
19
nrpc-build/Cargo.toml
Normal file
19
nrpc-build/Cargo.toml
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
[package]
|
||||
name = "nrpc-build"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
# gRPC/protobuf
|
||||
protox = "0.3"
|
||||
prost-build = "0.11"
|
||||
|
||||
# code gen
|
||||
prettyplease = "0.2"
|
||||
quote = "1.0"
|
||||
syn = "2.0"
|
||||
proc-macro2 = "1.0"
|
||||
|
||||
nrpc = { version = "0.1", path = "../nrpc" }
|
||||
39
nrpc-build/src/builder.rs
Normal file
39
nrpc-build/src/builder.rs
Normal file
|
|
@ -0,0 +1,39 @@
|
|||
use std::path::Path;
|
||||
use std::convert::AsRef;
|
||||
use std::iter::IntoIterator;
|
||||
|
||||
use prost_build::Config;
|
||||
|
||||
/// Compile proto files into Rust with server and client implementations
|
||||
pub fn compile(
|
||||
files: impl IntoIterator<Item = impl AsRef<Path>>,
|
||||
includes: impl IntoIterator<Item = impl AsRef<Path>>
|
||||
) {
|
||||
let file_descriptors = protox::compile(files, includes).unwrap();
|
||||
Config::new()
|
||||
.service_generator(Box::new(super::ProtobufServiceGenerator::all()))
|
||||
.compile_fds(file_descriptors)
|
||||
.unwrap();
|
||||
}
|
||||
|
||||
pub fn compile_clients(
|
||||
files: impl IntoIterator<Item = impl AsRef<Path>>,
|
||||
includes: impl IntoIterator<Item = impl AsRef<Path>>,
|
||||
) {
|
||||
let file_descriptors = protox::compile(files, includes).unwrap();
|
||||
Config::new()
|
||||
.service_generator(Box::new(super::ProtobufServiceGenerator::client()))
|
||||
.compile_fds(file_descriptors)
|
||||
.unwrap();
|
||||
}
|
||||
|
||||
pub fn compile_servers(
|
||||
files: impl IntoIterator<Item = impl AsRef<Path>>,
|
||||
includes: impl IntoIterator<Item = impl AsRef<Path>>,
|
||||
) {
|
||||
let file_descriptors = protox::compile(files, includes).unwrap();
|
||||
Config::new()
|
||||
.service_generator(Box::new(super::ProtobufServiceGenerator::server()))
|
||||
.compile_fds(file_descriptors)
|
||||
.unwrap();
|
||||
}
|
||||
5
nrpc-build/src/lib.rs
Normal file
5
nrpc-build/src/lib.rs
Normal file
|
|
@ -0,0 +1,5 @@
|
|||
mod builder;
|
||||
mod service_gen;
|
||||
|
||||
pub use builder::{compile, compile_servers, compile_clients};
|
||||
pub(crate) use service_gen::ProtobufServiceGenerator;
|
||||
210
nrpc-build/src/service_gen.rs
Normal file
210
nrpc-build/src/service_gen.rs
Normal file
|
|
@ -0,0 +1,210 @@
|
|||
use prost_build::{Service, ServiceGenerator};
|
||||
use quote::quote;
|
||||
|
||||
pub(crate) struct ProtobufServiceGenerator {
|
||||
generate_server: bool,
|
||||
generate_client: bool,
|
||||
}
|
||||
|
||||
impl ProtobufServiceGenerator {
|
||||
pub fn all() -> Self {
|
||||
Self {
|
||||
generate_server: true,
|
||||
generate_client: true,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn client() -> Self {
|
||||
Self {
|
||||
generate_server: false,
|
||||
generate_client: true,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn server() -> Self {
|
||||
Self {
|
||||
generate_server: true,
|
||||
generate_client: false,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn trait_methods_server(descriptors: &Vec<prost_build::Method>) -> proc_macro2::TokenStream {
|
||||
let mut gen_methods = Vec::with_capacity(descriptors.len());
|
||||
let mut gen_method_match_arms = Vec::with_capacity(descriptors.len());
|
||||
for descriptor in descriptors {
|
||||
match (descriptor.client_streaming, descriptor.server_streaming) {
|
||||
(false, false) => { // no streaming; 1->1
|
||||
let input_ty = quote::format_ident!("{}", descriptor.input_type);
|
||||
let output_ty = quote::format_ident!("{}", descriptor.output_type);
|
||||
let fn_name = quote::format_ident!("{}", descriptor.name);
|
||||
let method_name = &descriptor.name;
|
||||
gen_methods.push(
|
||||
quote! {
|
||||
async fn #fn_name(&mut self, input: #input_ty) -> Result<#output_ty, Box<dyn std::error::Error>>;
|
||||
}
|
||||
);
|
||||
|
||||
gen_method_match_arms.push(
|
||||
quote! {
|
||||
#method_name => {
|
||||
Ok(self.#fn_name(#input_ty::decode(payload)?).await?.encode(buffer)?)
|
||||
}
|
||||
}
|
||||
);
|
||||
},
|
||||
(true, false) => { // client streaming; 1 -> many
|
||||
todo!("streaming not supported")
|
||||
},
|
||||
(false, true) => { // server streaming; many -> 1
|
||||
todo!("streaming not supported")
|
||||
}
|
||||
(true, true) => { // all streaming; many -> many
|
||||
todo!("streaming not supported")
|
||||
},
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
quote! {
|
||||
#(#gen_methods)*
|
||||
|
||||
async fn call(&mut self, method: &str, payload: ::nrpc::_helpers::bytes::Bytes, buffer: &mut ::nrpc::_helpers::bytes::BytesMut) -> Result<(), ::nrpc::ServiceError> {
|
||||
match method {
|
||||
#(#gen_method_match_arms)*
|
||||
_ => Err(::nrpc::ServiceError::MethodNotFound)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn struct_methods_client(service_name: &str, descriptors: &Vec<prost_build::Method>) -> proc_macro2::TokenStream {
|
||||
let mut gen_methods = Vec::with_capacity(descriptors.len());
|
||||
for descriptor in descriptors {
|
||||
match (descriptor.client_streaming, descriptor.server_streaming) {
|
||||
(false, false) => { // no streaming; 1->1
|
||||
let input_ty = quote::format_ident!("{}", descriptor.input_type);
|
||||
let output_ty = quote::format_ident!("{}", descriptor.output_type);
|
||||
let fn_name = quote::format_ident!("{}", descriptor.name);
|
||||
let method_name = &descriptor.name;
|
||||
gen_methods.push(
|
||||
quote! {
|
||||
pub async fn #fn_name(&mut self, input: #input_ty) -> Result<#output_ty, ::nrpc::ServiceError> {
|
||||
let mut in_buf = ::nrpc::_helpers::bytes::BytesMut::new();
|
||||
input.encode(&mut in_buf)?;
|
||||
let mut out_buf = ::nrpc::_helpers::bytes::BytesMut::new();
|
||||
self.inner.call(#service_name, #method_name, in_buf.into(), &mut out_buf).await?;
|
||||
Ok(#output_ty::decode(out_buf)?)
|
||||
}
|
||||
}
|
||||
);
|
||||
},
|
||||
(true, false) => { // client streaming; 1 -> many
|
||||
todo!("streaming not supported")
|
||||
},
|
||||
(false, true) => { // server streaming; many -> 1
|
||||
todo!("streaming not supported")
|
||||
}
|
||||
(true, true) => { // all streaming; many -> many
|
||||
todo!("streaming not supported")
|
||||
},
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
quote! {
|
||||
#(#gen_methods)*
|
||||
}
|
||||
}
|
||||
|
||||
impl ServiceGenerator for ProtobufServiceGenerator {
|
||||
fn generate(&mut self, service: Service, buf: &mut String) {
|
||||
if self.generate_server {
|
||||
let service_mod_name = quote::format_ident!("{}_mod_server", service.name.to_lowercase());
|
||||
let service_trait_name = quote::format_ident!("{}Service", service.name);
|
||||
let service_trait_methods = trait_methods_server(&service.methods);
|
||||
let service_struct_name = quote::format_ident!("{}ServiceImpl", service.name);
|
||||
let descriptor_str = format!("{}.{}", service.package, service.name);
|
||||
let gen_service = quote! {
|
||||
mod #service_mod_name {
|
||||
use super::*;
|
||||
use ::nrpc::_helpers::async_trait::async_trait;
|
||||
use ::nrpc::_helpers::prost::Message;
|
||||
|
||||
#[async_trait]
|
||||
pub trait #service_trait_name: Send {
|
||||
#service_trait_methods
|
||||
}
|
||||
|
||||
pub struct #service_struct_name<T: #service_trait_name> {
|
||||
inner: T,
|
||||
}
|
||||
|
||||
impl <T: #service_trait_name> #service_struct_name<T> {
|
||||
pub fn new(inner: T) -> Self {
|
||||
Self {
|
||||
inner,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[async_trait]
|
||||
impl<T: #service_trait_name> ::nrpc::ServerService for #service_struct_name<T> {
|
||||
fn descriptor(&self) -> &'static str {
|
||||
#descriptor_str
|
||||
}
|
||||
|
||||
async fn call(&mut self, method: &str, payload: ::nrpc::_helpers::bytes::Bytes, buffer: &mut ::nrpc::_helpers::bytes::BytesMut) -> Result<(), ::nrpc::ServiceError> {
|
||||
self.inner.call(method, payload, buffer).await
|
||||
}
|
||||
}
|
||||
}
|
||||
pub mod server {
|
||||
pub use super::#service_mod_name::{#service_struct_name, #service_trait_name};
|
||||
}
|
||||
};
|
||||
let gen_code: syn::File = syn::parse2(gen_service).expect("invalid tokenstream");
|
||||
let code_str = prettyplease::unparse(&gen_code);
|
||||
buf.push_str(&code_str);
|
||||
}
|
||||
if self.generate_client {
|
||||
let service_mod_name = quote::format_ident!("{}_mod_client", service.name.to_lowercase());
|
||||
let service_methods = struct_methods_client(&service.name, &service.methods);
|
||||
let service_struct_name = quote::format_ident!("{}Service", service.name);
|
||||
let descriptor_str = format!("{}.{}", service.package, service.name);
|
||||
let gen_client = quote! {
|
||||
mod #service_mod_name {
|
||||
use super::*;
|
||||
use ::nrpc::_helpers::prost::Message;
|
||||
|
||||
//#[derive(core::any::Any)]
|
||||
pub struct #service_struct_name<T: ::nrpc::ClientHandler> {
|
||||
inner: T,
|
||||
}
|
||||
|
||||
impl <T: ::nrpc::ClientHandler> ::nrpc::ClientService for #service_struct_name<T> {
|
||||
fn descriptor(&self) -> &'static str {
|
||||
#descriptor_str
|
||||
}
|
||||
}
|
||||
|
||||
impl <T: ::nrpc::ClientHandler> #service_struct_name<T> {
|
||||
pub fn new(inner: T) -> Self {
|
||||
Self {
|
||||
inner,
|
||||
}
|
||||
}
|
||||
|
||||
#service_methods
|
||||
}
|
||||
}
|
||||
pub mod client {
|
||||
pub use super::#service_mod_name::#service_struct_name;
|
||||
}
|
||||
};
|
||||
let gen_code: syn::File = syn::parse2(gen_client).expect("invalid tokenstream");
|
||||
let code_str = prettyplease::unparse(&gen_code);
|
||||
buf.push_str(&code_str);
|
||||
}
|
||||
}
|
||||
}
|
||||
16
nrpc-codegen-test/Cargo.toml
Normal file
16
nrpc-codegen-test/Cargo.toml
Normal file
|
|
@ -0,0 +1,16 @@
|
|||
[package]
|
||||
name = "nrpc-codegen-test"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
prost = "0.11"
|
||||
nrpc = { version = "0.1", path = "../nrpc" }
|
||||
bytes = "1"
|
||||
async-trait = "0.1"
|
||||
tokio = { version = "*", features = [ "full" ] }
|
||||
|
||||
[build-dependencies]
|
||||
nrpc-build = { version = "0.1", path = "../nrpc-build" }
|
||||
3
nrpc-codegen-test/build.rs
Normal file
3
nrpc-codegen-test/build.rs
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
fn main() {
|
||||
nrpc_build::compile(["./proto/helloworld.proto"], ["."])
|
||||
}
|
||||
37
nrpc-codegen-test/proto/helloworld.proto
Normal file
37
nrpc-codegen-test/proto/helloworld.proto
Normal file
|
|
@ -0,0 +1,37 @@
|
|||
// Copyright 2015 gRPC authors.
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
syntax = "proto3";
|
||||
|
||||
option java_multiple_files = true;
|
||||
option java_package = "io.grpc.examples.helloworld";
|
||||
option java_outer_classname = "HelloWorldProto";
|
||||
|
||||
package helloworld;
|
||||
|
||||
// The greeting service definition.
|
||||
service Greeter {
|
||||
// Sends a greeting
|
||||
rpc SayHello (HelloRequest) returns (HelloReply) {}
|
||||
}
|
||||
|
||||
// The request message containing the user's name.
|
||||
message HelloRequest {
|
||||
string name = 1;
|
||||
}
|
||||
|
||||
// The response message containing the greetings
|
||||
message HelloReply {
|
||||
string message = 1;
|
||||
}
|
||||
61
nrpc-codegen-test/src/main.rs
Normal file
61
nrpc-codegen-test/src/main.rs
Normal file
|
|
@ -0,0 +1,61 @@
|
|||
use std::error::Error;
|
||||
|
||||
use prost::Message;
|
||||
use nrpc::ServerService;
|
||||
|
||||
pub mod helloworld {
|
||||
include!(concat!(env!("OUT_DIR"), "/helloworld.rs"));
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() {
|
||||
let req = helloworld::HelloRequest {
|
||||
name: "World".into(),
|
||||
};
|
||||
let resp = helloworld::HelloReply {
|
||||
message: "Hello World".into(),
|
||||
};
|
||||
// server
|
||||
let mut service_impl = helloworld::server::GreeterServiceImpl::new(GreeterService);
|
||||
let mut input_buf = bytes::BytesMut::new();
|
||||
let mut output_buf = bytes::BytesMut::new();
|
||||
req.encode(&mut input_buf).unwrap();
|
||||
service_impl.call("say_hello", input_buf.into(), &mut output_buf).await.unwrap();
|
||||
let actual_resp = helloworld::HelloReply::decode(output_buf).unwrap();
|
||||
assert_eq!(resp, actual_resp);
|
||||
|
||||
// client
|
||||
let mut client_impl = helloworld::client::GreeterService::new(ClientHandler);
|
||||
let resp = client_impl.say_hello(req).await.unwrap();
|
||||
assert_eq!(resp, actual_resp);
|
||||
}
|
||||
|
||||
struct GreeterService;
|
||||
|
||||
#[async_trait::async_trait]
|
||||
impl helloworld::server::GreeterService for GreeterService {
|
||||
async fn say_hello(&mut self, input: helloworld::HelloRequest) -> Result<helloworld::HelloReply, Box<dyn Error>> {
|
||||
let result = helloworld::HelloReply {
|
||||
message: format!("Hello {}", input.name),
|
||||
};
|
||||
println!("{}", result.message);
|
||||
Ok(result)
|
||||
}
|
||||
}
|
||||
|
||||
struct ClientHandler;
|
||||
|
||||
#[async_trait::async_trait]
|
||||
impl nrpc::ClientHandler for ClientHandler {
|
||||
async fn call(&mut self,
|
||||
service: &str,
|
||||
method: &str,
|
||||
input: bytes::Bytes,
|
||||
output: &mut bytes::BytesMut) -> Result<(), nrpc::ServiceError> {
|
||||
println!("call {}/{} with data {:?}", service, method, input);
|
||||
// This is ok to hardcode ONLY because it's for testing
|
||||
Ok(helloworld::HelloReply {
|
||||
message: "Hello World".into(),
|
||||
}.encode(output)?)
|
||||
}
|
||||
}
|
||||
11
nrpc/Cargo.toml
Normal file
11
nrpc/Cargo.toml
Normal file
|
|
@ -0,0 +1,11 @@
|
|||
[package]
|
||||
name = "nrpc"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
prost = "0.11"
|
||||
bytes = "1"
|
||||
async-trait = "0.1"
|
||||
9
nrpc/src/lib.rs
Normal file
9
nrpc/src/lib.rs
Normal file
|
|
@ -0,0 +1,9 @@
|
|||
mod service;
|
||||
|
||||
pub use service::{ServerService, ServiceError, ClientService, ClientHandler};
|
||||
|
||||
pub mod _helpers {
|
||||
pub use async_trait;
|
||||
pub use bytes;
|
||||
pub use prost;
|
||||
}
|
||||
63
nrpc/src/service.rs
Normal file
63
nrpc/src/service.rs
Normal file
|
|
@ -0,0 +1,63 @@
|
|||
#[async_trait::async_trait]
|
||||
pub trait ServerService {
|
||||
fn descriptor(&self) -> &'static str;
|
||||
|
||||
async fn call(&mut self,
|
||||
method: &str,
|
||||
input: bytes::Bytes,
|
||||
output: &mut bytes::BytesMut) -> Result<(), ServiceError>;
|
||||
}
|
||||
|
||||
#[async_trait::async_trait]
|
||||
pub trait ClientHandler {
|
||||
async fn call(&mut self,
|
||||
service: &str,
|
||||
method: &str,
|
||||
input: bytes::Bytes,
|
||||
output: &mut bytes::BytesMut) -> Result<(), ServiceError>;
|
||||
}
|
||||
|
||||
pub trait ClientService {
|
||||
fn descriptor(&self) -> &'static str;
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum ServiceError {
|
||||
Encode(prost::EncodeError),
|
||||
Decode(prost::DecodeError),
|
||||
MethodNotFound,
|
||||
ServiceNotFound,
|
||||
Method(Box<dyn std::error::Error>),
|
||||
}
|
||||
|
||||
impl std::fmt::Display for ServiceError {
|
||||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||
match self {
|
||||
Self::Encode(en) => write!(f, "Encode error: {}", en),
|
||||
Self::Decode(de) => write!(f, "Decode error: {}", de),
|
||||
Self::MethodNotFound => write!(f, "Method not found error"),
|
||||
Self::ServiceNotFound => write!(f, "Service not found error"),
|
||||
Self::Method(e) => write!(f, "Method error: {}", e),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl std::convert::From<prost::EncodeError> for ServiceError {
|
||||
fn from(value: prost::EncodeError) -> Self {
|
||||
Self::Encode(value)
|
||||
}
|
||||
}
|
||||
|
||||
impl std::convert::From<prost::DecodeError> for ServiceError {
|
||||
fn from(value: prost::DecodeError) -> Self {
|
||||
Self::Decode(value)
|
||||
}
|
||||
}
|
||||
|
||||
impl std::convert::From<Box<dyn std::error::Error>> for ServiceError {
|
||||
fn from(value: Box<dyn std::error::Error>) -> Self {
|
||||
Self::Method(value)
|
||||
}
|
||||
}
|
||||
|
||||
impl std::error::Error for ServiceError {}
|
||||
Loading…
Reference in a new issue