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use super::Encoding;
use crate::imports::*;
use crate::messages::borsh::*;
pub use crate::server::result::Result;
use crate::server::Interface;
use crate::server::ProtocolHandler;
use workflow_websocket::server::{
Error as WebSocketError, Message, Result as WebSocketResult, WebSocketSink,
};
pub struct BorshProtocol<ServerContext, ConnectionContext, Ops, Id>
where
ServerContext: Clone + Send + Sync + 'static,
ConnectionContext: Clone + Send + Sync + 'static,
Ops: OpsT,
Id: IdT,
{
id: PhantomData<Id>,
ops: PhantomData<Ops>,
interface: Arc<Interface<ServerContext, ConnectionContext, Ops>>,
}
#[async_trait]
impl<ServerContext, ConnectionContext, Ops, Id>
ProtocolHandler<ServerContext, ConnectionContext, Ops>
for BorshProtocol<ServerContext, ConnectionContext, Ops, Id>
where
ServerContext: Clone + Send + Sync + 'static,
ConnectionContext: Clone + Send + Sync + 'static,
Ops: OpsT,
Id: IdT,
{
fn new(interface: Arc<Interface<ServerContext, ConnectionContext, Ops>>) -> Self
where
Self: Sized,
{
BorshProtocol {
id: PhantomData,
ops: PhantomData,
interface,
}
}
fn encoding(&self) -> Encoding {
Encoding::Borsh
}
async fn handle_message(
&self,
connection_ctx: ConnectionContext,
msg: Message,
sink: &WebSocketSink,
) -> WebSocketResult<()> {
let data = &msg.into_data();
let req: BorshClientMessage<Ops, Id> = data
.try_into()
.map_err(|_| WebSocketError::MalformedMessage)?;
if req.header.id.is_some() {
let result = self
.interface
.call_method_with_borsh(&req.header.op, connection_ctx, req.payload)
.await;
match result {
Ok(data) => {
if let Ok(msg) = BorshServerMessage::<Ops, Id>::new(
BorshServerMessageHeader::new(
req.header.id,
ServerMessageKind::Success,
Some(req.header.op),
),
&data,
)
.try_to_vec()
{
if let Err(e) = sink.send(msg.into()) {
log_trace!("Sink error: {:?}", e);
}
}
}
Err(err) => {
log_trace!("RPC server error: {:?} req: {:#?}", err, req);
if err == ServerError::Close {
return Err(WebSocketError::ServerClose);
} else if let Ok(err_vec) = err.try_to_vec() {
if let Ok(msg) = BorshServerMessage::new(
BorshServerMessageHeader::<Ops, Id>::new(
req.header.id,
ServerMessageKind::Error,
None,
),
&err_vec,
)
.try_to_vec()
{
if let Err(e) = sink.send(msg.into()) {
log_trace!("Sink error: {:?}", e);
}
}
}
}
}
} else {
self.interface
.call_notification_with_borsh(&req.header.op, connection_ctx, req.payload)
.await
.unwrap_or_else(|err| {
log_trace!("error handling client-side notification {}", err)
});
}
Ok(())
}
}
pub fn create_notify_message_with_borsh<Ops, Msg>(op: Ops, msg: Msg) -> Result<Message>
where
Ops: BorshSerialize + BorshDeserialize + Send + Sync + 'static,
Msg: BorshSerialize + Send + Sync + 'static,
{
let payload = msg.try_to_vec()?;
let data = BorshServerMessage::new(
BorshServerMessageHeader::<Ops, ()>::new(None, ServerMessageKind::Notification, Some(op)),
&payload,
)
.try_to_vec()?;
Ok(Message::Binary(data))
}