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// Copyright 2019-2020 Parity Technologies (UK) Ltd.
//
// Permission is hereby granted, free of charge, to any
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the
// Software without restriction, including without
// limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
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//! Example of using proc macro to generate working client and server.
use std::net::SocketAddr;
use futures_channel::oneshot;
use jsonrpsee::{ws_client::*, ws_server::WsServerBuilder};
mod rpc_impl {
use jsonrpsee::{proc_macros::rpc, types::async_trait, ws_server::SubscriptionSink};
#[rpc(client, server, namespace = "foo")]
pub trait Rpc {
#[method(name = "foo")]
async fn async_method(&self, param_a: u8, param_b: String) -> u16;
#[method(name = "bar")]
fn sync_method(&self) -> u16;
#[subscription(name = "sub", unsub = "unsub", item = String)]
fn sub(&self);
#[subscription(name = "echo", unsub = "no_more_echo", item = u32)]
fn sub_with_params(&self, val: u32);
}
pub struct RpcServerImpl;
#[async_trait]
impl RpcServer for RpcServerImpl {
async fn async_method(&self, _param_a: u8, _param_b: String) -> u16 {
42u16
}
fn sync_method(&self) -> u16 {
10u16
}
fn sub(&self, mut sink: SubscriptionSink) {
sink.send(&"Response_A").unwrap();
sink.send(&"Response_B").unwrap();
}
fn sub_with_params(&self, mut sink: SubscriptionSink, val: u32) {
sink.send(&val).unwrap();
sink.send(&val).unwrap();
}
}
}
// Use generated implementations of server and client.
use rpc_impl::{RpcClient, RpcServer, RpcServerImpl};
pub async fn websocket_server() -> SocketAddr {
let (server_started_tx, server_started_rx) = oneshot::channel();
std::thread::spawn(move || {
let rt = tokio::runtime::Runtime::new().unwrap();
let mut server = rt.block_on(WsServerBuilder::default().build("127.0.0.1:0")).unwrap();
server.register_module(RpcServerImpl.into_rpc().unwrap()).unwrap();
rt.block_on(async move {
server_started_tx.send(server.local_addr().unwrap()).unwrap();
server.start().await
});
});
server_started_rx.await.unwrap()
}
#[tokio::test]
async fn proc_macros_generic_ws_client_api() {
let server_addr = websocket_server().await;
let server_url = format!("ws://{}", server_addr);
let client = WsClientBuilder::default().build(&server_url).await.unwrap();
assert_eq!(client.async_method(10, "a".into()).await.unwrap(), 42);
assert_eq!(client.sync_method().await.unwrap(), 10);
// Sub without params
let mut sub = client.sub().await.unwrap();
let first_recv = sub.next().await.unwrap();
assert_eq!(first_recv, Some("Response_A".to_string()));
let second_recv = sub.next().await.unwrap();
assert_eq!(second_recv, Some("Response_B".to_string()));
// Sub with params
let mut sub = client.sub_with_params(42).await.unwrap();
let first_recv = sub.next().await.unwrap();
assert_eq!(first_recv, Some(42));
let second_recv = sub.next().await.unwrap();
assert_eq!(second_recv, Some(42));
}