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use std::{
collections::HashMap,
sync::{
atomic::{AtomicBool, AtomicU32, Ordering},
Arc,
},
time::Duration,
};
use async_std::{
channel::{bounded, Receiver, Sender},
io::{BufWriter, WriteExt},
net::TcpStream,
stream::{self, StreamExt},
sync::RwLock,
task,
};
use crate::types::{Config, Error, Field, InternalMDResult, SubID, DELIMITER};
use crate::{
messages::{HeartbeatReq, LogonReq, LogoutReq, RequestMessage, ResponseMessage, TestReq},
types::ConnectionHandler,
};
use crate::{socket::Socket, types::MarketCallback};
pub struct FixApi {
config: Config,
stream: Option<Arc<TcpStream>>,
seq: Arc<AtomicU32>,
sub_id: SubID,
is_connected: Arc<AtomicBool>,
res_receiver: Option<Receiver<ResponseMessage>>,
pub trigger: Sender<String>,
listener: Receiver<String>,
pub container: Arc<RwLock<HashMap<String, Vec<ResponseMessage>>>>,
//callback
connection_handler: Option<Arc<dyn ConnectionHandler + Send + Sync>>,
market_callback: Option<MarketCallback>,
}
impl FixApi {
pub fn new(
sub_id: SubID,
host: String,
login: String,
password: String,
sender_comp_id: String,
heartbeat_interval: Option<u32>,
) -> Self {
let (tx, rx) = bounded(1);
Self {
config: Config::new(
host,
login,
password,
sender_comp_id,
heartbeat_interval.unwrap_or(30),
),
stream: None,
res_receiver: None,
trigger: tx,
listener: rx,
is_connected: Arc::new(AtomicBool::new(false)),
seq: Arc::new(AtomicU32::new(1)),
container: Arc::new(RwLock::new(HashMap::new())),
sub_id,
connection_handler: None,
market_callback: None,
}
}
pub fn register_market_callback<F>(&mut self, callback: F)
where
F: Fn(InternalMDResult) -> () + Send + Sync + 'static,
{
self.market_callback = Some(Arc::new(move |mdresult: InternalMDResult| -> () {
callback(mdresult)
}));
}
pub fn register_connection_handler_arc<T: ConnectionHandler + Send + Sync + 'static>(
&mut self,
handler: Arc<T>,
) {
self.connection_handler = Some(handler);
}
pub fn register_connection_handler<T: ConnectionHandler + Send + Sync + 'static>(
&mut self,
handler: T,
) {
self.connection_handler = Some(Arc::new(handler));
}
pub async fn disconnect(&mut self) -> Result<(), Error> {
if let Some(stream) = self.stream.clone() {
stream.shutdown(std::net::Shutdown::Both)?;
}
self.stream = None;
self.res_receiver = None;
self.is_connected.store(false, Ordering::Relaxed);
Ok(())
}
pub async fn connect(&mut self) -> Result<(), Error> {
let (sender, receiver) = bounded(1);
let mut socket = Socket::connect(
self.config.host.as_str(),
if self.sub_id == SubID::QUOTE {
5201
} else {
5202
},
sender,
)
.await?;
self.is_connected.store(true, Ordering::Relaxed);
log::debug!("stream connected");
// notify connection
if let Some(handler) = self.connection_handler.clone() {
task::spawn(async move {
handler.on_connect().await;
});
}
self.res_receiver = Some(receiver);
self.stream = Some(socket.stream.clone());
let is_connected = self.is_connected.clone();
let handler = self.connection_handler.clone();
let _ = task::spawn(async move {
socket.recv_loop(is_connected, handler).await.unwrap();
});
Ok(())
}
pub async fn send_message<R: RequestMessage>(&self, req: R) -> Result<(), Error> {
let no_seq = self.seq.fetch_add(1, Ordering::Relaxed);
let req = req.build(self.sub_id, no_seq, DELIMITER, &self.config);
if let Some(stream) = self.stream.clone() {
log::debug!("Send request : {}", req);
let mut writer = BufWriter::new(stream.as_ref());
writer.write_all(req.as_bytes()).await?;
writer.flush().await?;
}
Ok(())
}
pub fn is_connected(&self) -> bool {
self.is_connected.load(Ordering::Relaxed)
}
pub async fn wait_notifier(&self) -> Result<String, Error> {
if !self.is_connected() {
return Err(Error::NotConnected);
}
self.listener.recv().await.map_err(|e| e.into())
}
pub async fn check_responses(
&self,
arg: HashMap<&str, (&str, Field, String)>,
) -> Result<Vec<ResponseMessage>, Error> {
let mut cont = self.container.write().await;
for (msg_type, (mt, field, value)) in arg.into_iter() {
if let Some(responses) = cont.get_mut(msg_type) {
let mut result = Vec::new();
let idx: Vec<usize> = responses
.iter()
.enumerate()
.filter(|(_, v)| v.get_field_value(field).filter(|v| v == &value).is_some())
.map(|(i, _)| i)
.collect();
for i in idx.into_iter().rev() {
result.push(responses.remove(i));
}
if !result.is_empty() {
return Ok(result);
}
}
}
Err(Error::NoResponse)
}
//
// request
//
// pub async fn heartbeat(&mut self) -> Result<(), Error> {
// self.send_message(HeartbeatReq::default()).await?;
// Ok(())
// }
pub async fn logon(&self) -> Result<(), Error> {
// TODO check the connected
self.send_message(LogonReq::default()).await?;
// wait to receive the response
if let Some(recv) = &self.res_receiver {
while let Ok(response) = recv.recv().await {
// logon response
let msg_type = response.get_message_type();
match msg_type {
"A" => {
//
if let Some(handler) = self.connection_handler.clone() {
task::spawn(async move {
handler.on_logon().await;
});
}
let stream = self.stream.clone().unwrap();
let sub_id = self.sub_id;
let config = self.config.clone();
let seq = self.seq.clone();
let send_request = move |req: Box<dyn RequestMessage>| {
let stream = stream.clone();
let sub_id = sub_id;
let config = config.clone();
let seq = seq.clone();
async move {
let req = req.build(
sub_id,
seq.fetch_add(1, Ordering::Relaxed),
DELIMITER,
&config,
);
let mut writer = BufWriter::new(stream.as_ref());
let _ = writer.write_all(req.as_bytes()).await;
writer.flush().await.unwrap_or_else(|e| {
log::error!("Failed to send the heartbeat request - {:?}", e);
});
}
};
let send_request_clone = send_request.clone();
let hb_interval = self.config.heart_beat as u64;
//
// send heartbeat per hb_interval
task::spawn(async move {
let mut heartbeat_stream =
stream::interval(Duration::from_secs(hb_interval));
while let Some(_) = heartbeat_stream.next().await {
let req = HeartbeatReq::default();
send_request(Box::new(req)).await;
log::debug!("Sent the heartbeat");
}
});
//
// handle the responses
// notifier
let tx = self.trigger.clone();
let recv = self.res_receiver.clone().unwrap();
let cont = self.container.clone();
let market_callback = self.market_callback.clone();
task::spawn(async move {
while let Ok(res) = recv.recv().await {
let msg_type = res.get_message_type();
let mtype = String::from(msg_type);
// notify? or send? via channel?
match msg_type {
"5" => {
// 5 : logout
tx.send(mtype).await.unwrap_or_else(|e| {
// fatal
log::error!(
"Failed to notify that the response is received - {:?}",
e
);
});
}
"1" => {
// send back with test request id
if let Some(test_req_id) =
res.get_field_value(Field::TestReqID)
{
send_request_clone(Box::new(TestReq::new(test_req_id)))
.await;
log::debug!("Sent the heartbeat from test_req_id");
}
}
"W" | "X" | "Y" => {
// market data
let symbol_id = res
.get_field_value(Field::Symbol)
.unwrap_or("0".into())
.parse::<u32>()
.unwrap();
// notify to callback
if let Some(market_callback) = market_callback.clone() {
let mdresult = if msg_type == "Y" {
let md_req_id = res
.get_field_value(Field::MDReqID)
.map(|v| v.clone())
.unwrap_or("".into());
let err_msg = res
.get_field_value(Field::Text)
.map(|v| v.clone())
.unwrap_or("".into());
InternalMDResult::MDReject {
symbol_id,
md_req_id,
err_msg,
}
} else {
let data = res.get_repeating_groups(
Field::NoMDEntries,
if msg_type == "W" {
Field::MDEntryType
} else {
Field::MDUpdateAction
},
None,
);
InternalMDResult::MD {
msg_type: msg_type.chars().next().unwrap(),
symbol_id,
data,
}
};
market_callback(mdresult);
}
}
_ => {
log::debug!("{}", res.get_message());
// FIXME later remove line
if let Some(seq_num) = res.get_field_value(Field::MsgSeqNum)
{
// store the response in container.
{
let mut cont = cont.write().await;
cont.entry(mtype.clone())
.or_insert(Vec::new())
.push(res);
}
tx.send(mtype).await.unwrap_or_else(|e| {
// fatal
log::error!(
"Failed to notify that the response is received - {:?}",
e
);
});
} else {
log::debug!("No seq number : {}", res.get_message());
}
}
}
}
});
break;
}
"5" => {
return Err(Error::LoggedOut);
}
_ => {}
}
}
}
Ok(())
}
pub async fn logout(&self) -> Result<(), Error> {
self.send_message(LogoutReq::default()).await?;
Ok(())
}
}