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#[cfg(feature = "system")]
use std::sync::atomic::Ordering;
use dapts::IRequest;
use super::*;
impl<S: 'static> TypedLspClient<S> {
/// Sends a dap event to the client.
pub fn send_dap_event<E: dapts::IEvent>(&self, body: E::Body) {
let req_id = self.req_queue.lock().outgoing.alloc_request_id();
self.send_dap_event_(dap::Event::new(req_id as i64, E::EVENT.to_owned(), body));
}
/// Sends an untyped dap_event to the client.
pub fn send_dap_event_(&self, evt: dap::Event) {
self.sender.send_message(evt.into());
}
}
impl<Args: Initializer> LsBuilder<DapMessage, Args>
where
Args::S: 'static,
{
/// Registers an async command handler.
pub fn with_command<R: Serialize + 'static>(
mut self,
cmd: &'static str,
handler: AsyncHandler<Args::S, Vec<JsonValue>, R>,
) -> Self {
self.command_handlers.insert(
cmd,
Box::new(move |s, req| erased_response(handler(s, req))),
);
self
}
/// Registers a raw request handler that handlers a kind of untyped lsp
/// request.
pub fn with_raw_request<R: IRequest>(
mut self,
handler: RawHandler<Args::S, JsonValue>,
) -> Self {
self.req_handlers.insert(R::COMMAND, Box::new(handler));
self
}
// todo: unsafe typed
/// Registers an raw request handler that handlers a kind of typed lsp
/// request.
pub fn with_request_<R: IRequest>(
mut self,
handler: fn(&mut Args::S, R::Arguments) -> ScheduleResult,
) -> Self {
self.req_handlers.insert(
R::COMMAND,
Box::new(move |s, req| handler(s, from_json(req)?)),
);
self
}
/// Registers a typed request handler.
pub fn with_request<R: IRequest>(
mut self,
handler: AsyncHandler<Args::S, R::Arguments, R::Response>,
) -> Self {
self.req_handlers.insert(
R::COMMAND,
Box::new(move |s, req| erased_response(handler(s, from_json(req)?))),
);
self
}
}
#[cfg(feature = "system")]
impl<Args: Initializer> LsDriver<DapMessage, Args>
where
Args::S: 'static,
{
/// Starts the debug adaptor on the given connection.
///
/// If `is_replay` is true, the server will wait for all pending requests to
/// finish before exiting. This is useful for testing the language server.
///
/// See [`transport::MirrorArgs`] for information about the record-replay
/// feature.
pub fn start(
&mut self,
inbox: TConnectionRx<DapMessage>,
is_replay: bool,
) -> anyhow::Result<()> {
let res = self.start_(inbox);
if is_replay {
let client = self.client.clone();
let _ = std::thread::spawn(move || {
let since = tinymist_std::time::Instant::now();
let timeout = std::env::var("REPLAY_TIMEOUT")
.ok()
.and_then(|s| s.parse().ok())
.unwrap_or(60);
client.handle.block_on(async {
while client.has_pending_requests() {
if since.elapsed().as_secs() > timeout {
log::error!("replay timeout reached, {timeout}s");
client.begin_panic();
}
tokio::time::sleep(tinymist_std::time::Duration::from_millis(10)).await;
}
})
})
.join();
}
res
}
/// Starts the debug adaptor on the given connection.
pub fn start_(&mut self, inbox: TConnectionRx<DapMessage>) -> anyhow::Result<()> {
use EventOrMessage::*;
while let Ok(msg) = inbox.recv() {
let loop_start = tinymist_std::time::now();
match msg {
Evt(event) => {
let Some(event_handler) = self.events.get(&event.as_ref().type_id()) else {
log::warn!("unhandled event: {:?}", event.as_ref().type_id());
continue;
};
let s = match &mut self.state {
State::Uninitialized(u) => ServiceState::Uninitialized(u.as_deref_mut()),
State::Initializing(s) | State::Ready(s) => ServiceState::Ready(s),
State::ShuttingDown => {
log::warn!("server is shutting down");
continue;
}
};
event_handler(s, &self.client, event)?;
}
Msg(DapMessage::Request(req)) => {
let client = self.client.clone();
let req_id = (req.seq as i32).into();
client.register_request(&req.command, &req_id, loop_start);
let fut = client.schedule_tail(req_id, self.on_request(req));
self.client.handle.spawn(fut);
}
Msg(DapMessage::Event(not)) => {
self.on_event(loop_start, not)?;
}
Msg(DapMessage::Response(resp)) => {
let s = match &mut self.state {
State::Ready(s) => s,
_ => {
log::warn!("server is not ready yet");
continue;
}
};
self.client.clone().complete_dap_request(s, resp)
}
}
}
log::warn!("client exited without proper shutdown sequence");
Ok(())
}
/// Registers and handles a request. This should only be called once per
/// incoming request.
fn on_request(&mut self, req: dap::Request) -> ScheduleResult {
match (&mut self.state, &*req.command) {
(State::Uninitialized(args), dapts::request::Initialize::COMMAND) => {
// todo: what will happen if the request cannot be deserialized?
let params = serde_json::from_value::<Args::I>(req.arguments);
match params {
Ok(params) => {
let args = args.take().expect("already initialized");
let (s, res) = args.initialize(params);
self.state = State::Ready(s);
res
}
Err(e) => just_result(Err(invalid_request(e))),
}
}
// (state, dap::events::Initialized::METHOD) => {
// let mut s = State::ShuttingDown;
// std::mem::swap(state, &mut s);
// match s {
// State::Initializing(s) => {
// *state = State::Ready(s);
// }
// _ => {
// std::mem::swap(state, &mut s);
// }
// }
// let s = match state {
// State::Ready(s) => s,
// _ => {
// log::warn!("server is not ready yet");
// return Ok(());
// }
// };
// handle(s, not)
// }
(State::Uninitialized(..) | State::Initializing(..), _) => {
just_result(Err(not_initialized()))
}
(_, dapts::request::Initialize::COMMAND) => {
just_result(Err(invalid_request("server is already initialized")))
}
// todo: generalize this
// (State::Ready(..), request::ExecuteCommand::METHOD) => {
// reschedule!(self.on_execute_command(req))
// }
(State::Ready(s), _) => 'serve_req: {
let method = req.command.as_str();
let is_disconnect = method == dapts::request::Disconnect::COMMAND;
let Some(handler) = self.requests.get(method) else {
log::warn!("unhandled dap request: {method}");
break 'serve_req just_result(Err(method_not_found()));
};
let resp = handler(s, req.arguments);
if is_disconnect {
self.state = State::ShuttingDown;
}
resp
}
(State::ShuttingDown, _) => {
just_result(Err(invalid_request("server is shutting down")))
}
}
}
/// Handles an incoming event.
fn on_event(&mut self, received_at: Time, not: dap::Event) -> anyhow::Result<()> {
let track_id = self.next_not_id.fetch_add(1, Ordering::Relaxed);
self.client.hook.start_notification(track_id, ¬.event);
let handle = |s,
dap::Event {
seq: _,
event,
body,
}: dap::Event| {
let Some(handler) = self.notifications.get(event.as_str()) else {
log::warn!("unhandled event: {event}");
return Ok(());
};
let result = handler(s, body);
self.client
.hook
.stop_notification(track_id, &event, received_at, result);
Ok(())
};
match (&mut self.state, &*not.event) {
(State::Ready(state), _) => handle(state, not),
// todo: whether it is safe to ignore events
(State::Uninitialized(..) | State::Initializing(..), method) => {
log::warn!("server is not ready yet, while received event {method}");
Ok(())
}
(State::ShuttingDown, method) => {
log::warn!("server is shutting down, while received event {method}");
Ok(())
}
}
}
}