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Add RpcClient::subscribe

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Co-Authored-By: Max Brunsfeld <max@zed.dev>
This commit is contained in:
Antonio Scandurra 2021-06-14 19:06:28 +02:00
parent cd1a4c49cf
commit e551894189
1 changed files with 38 additions and 10 deletions
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48
zed/src/rpc_client.rs
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@ -2,7 +2,7 @@ use anyhow::{anyhow, Result};
use gpui::executor::Background;
use parking_lot::Mutex;
use postage::{
oneshot,
mpsc, oneshot,
prelude::{Sink, Stream},
};
use smol::{
@ -11,11 +11,13 @@ use smol::{
prelude::{AsyncRead, AsyncWrite},
};
use std::{collections::HashMap, sync::Arc};
use zed_rpc::proto::{self, MessageStream, RequestMessage, SendMessage, ServerMessage};
use zed_rpc::proto::{
self, MessageStream, RequestMessage, SendMessage, ServerMessage, SubscribeMessage,
};
pub struct RpcClient<Conn> {
stream: MessageStream<WriteHalf<Conn>>,
response_channels: Arc<Mutex<HashMap<i32, oneshot::Sender<proto::from_server::Variant>>>>,
response_channels: Arc<Mutex<HashMap<i32, (mpsc::Sender<proto::from_server::Variant>, bool)>>>,
next_message_id: i32,
_drop_tx: oneshot::Sender<()>,
}
@ -59,9 +61,15 @@ where
Message::Message(message) => {
if let Some(variant) = message.variant {
if let Some(request_id) = message.request_id {
let tx = response_channels.lock().remove(&request_id);
if let Some(mut tx) = tx {
tx.send(variant).await?;
let channel = response_channels.lock().remove(&request_id);
if let Some((mut tx, oneshot)) = channel {
if tx.send(variant).await.is_ok() {
if !oneshot {
response_channels
.lock()
.insert(request_id, (tx, false));
}
}
} else {
log::warn!(
"received RPC response to unknown request id {}",
@ -85,10 +93,8 @@ where
pub async fn request<T: RequestMessage>(&mut self, req: T) -> Result<T::Response> {
let message_id = self.next_message_id;
self.next_message_id += 1;
let (tx, mut rx) = oneshot::channel();
self.response_channels.lock().insert(message_id, tx);
let (tx, mut rx) = mpsc::channel(1);
self.response_channels.lock().insert(message_id, (tx, true));
self.stream
.write_message(&proto::FromClient {
id: message_id,
@ -114,6 +120,28 @@ where
.await?;
Ok(())
}
pub async fn subscribe<T: SubscribeMessage>(
&mut self,
subscription: T,
) -> Result<impl Stream<Item = Result<T::Event>>> {
let message_id = self.next_message_id;
self.next_message_id += 1;
let (tx, rx) = mpsc::channel(256);
self.response_channels
.lock()
.insert(message_id, (tx, false));
self.stream
.write_message(&proto::FromClient {
id: message_id,
variant: Some(subscription.to_variant()),
})
.await?;
Ok(rx.map(|event| {
T::Event::from_variant(event).ok_or_else(|| anyhow!("invalid event {:?}"))
}))
}
}
#[cfg(test)]