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Make `ib` backend multi-client capable 

This adds full support for a single `brokerd` managing multiple API
endpoint clients in tandem. Get the client scan loop correct and load
accounts from all discovered clients as specified in a user's
`broker.toml`. We now just always re-scan for all clients and if there's
a cache hit just skip a creation/connection logic.

Route orders with an account name to the correct client in the
`handle_order_requests()` endpoint and spawn an event relay task per
client for transmitting trade events back to `emsd`.
fsp_feeds
Tyler Goodlet 2021-09-09 07:57:11 -04:00
parent dedfb27a3a
commit c53b8ec43c
1 changed files with 202 additions and 177 deletions
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133
piker/brokers/ib.py
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@ -219,6 +219,8 @@ class Client:
Note: this client requires running inside an ``asyncio`` loop.
"""
_contracts: dict[str, Contract] = {}
def __init__(
self,
@ -229,7 +231,6 @@ class Client:
self.ib.RaiseRequestErrors = True
# contract cache
self._contracts: dict[str, Contract] = {}
self._feeds: dict[str, trio.abc.SendChannel] = {}
# NOTE: the ib.client here is "throttled" to 45 rps by default
@ -505,7 +506,7 @@ class Client:
return contract, ticker, details
# async to be consistent for the client proxy, and cuz why not.
async def submit_limit(
def submit_limit(
self,
# ignored since ib doesn't support defining your
# own order id
@ -554,7 +555,7 @@ class Client:
# their own weird client int counting ids..
return trade.order.orderId
async def submit_cancel(
def submit_cancel(
self,
reqid: str,
) -> None:
@ -571,6 +572,7 @@ class Client:
async def recv_trade_updates(
self,
to_trio: trio.abc.SendChannel,
) -> None:
"""Stream a ticker using the std L1 api.
"""
@ -720,30 +722,9 @@ async def load_aio_clients(
global _client_cache
conf = get_config()
ib = None
client = None
# first check cache for existing client
if port:
log.info(f'Loading requested client on port: {port}')
client = _client_cache.get((host, port))
if client and client.ib.isConnected():
yield client, _client_cache, _accounts2clients
return
# allocate new and/or reload disconnected but cached clients
try:
# TODO: in case the arbiter has no record
# of existing brokerd we need to broadcast for one.
if client_id is None:
# if this is a persistent brokerd, try to allocate a new id for
# each client
client_id = next(_client_ids)
ib = NonShittyIB()
# attempt to get connection info from config; if no .toml entry
# exists, we try to load from a default localhost connection.
host = conf.get('host', '127.0.0.1')
@ -764,6 +745,9 @@ async def load_aio_clients(
try_ports = [ports[key] for key in order]
ports = try_ports if port is None else [port]
we_connected = []
# allocate new and/or reload disconnected but cached clients
try:
# TODO: support multiple clients allowing for execution on
# multiple accounts (including a paper instance running on the
# same machine) and switching between accounts in the EMs
@ -774,9 +758,15 @@ async def load_aio_clients(
# from connection details in ``brokers.toml``.
for port in ports:
client = _client_cache.get((host, port))
accounts_found: dict[str, Client] = {}
if not client or not client.ib.isConnected():
try:
ib = NonShittyIB()
# if this is a persistent brokerd, try to allocate
# a new id for each client
client_id = next(_client_ids)
log.info(f"Connecting to the EYEBEE on port {port}!")
await ib.connectAsync(host, port, clientId=client_id)
@ -789,7 +779,7 @@ async def load_aio_clients(
pps = ib.positions()
if pps:
for pp in pps:
_accounts2clients[
accounts_found[
accounts_def.inverse[pp.account]
] = client
@ -798,18 +788,21 @@ async def load_aio_clients(
# them for this client
for value in ib.accountValues():
acct = value.account
if acct not in _accounts2clients:
_accounts2clients[
if acct not in accounts_found:
accounts_found[
accounts_def.inverse[acct]
] = client
log.info(
f'Loaded accounts: {_accounts2clients} for {client} '
f'@ {host}:{port}'
f'Loaded accounts for client @ {host}:{port}\n'
f'{pformat(accounts_found)}'
)
# update all actor-global caches
log.info(f"Caching client for {(host, port)}")
_client_cache[(host, port)] = client
we_connected.append(client)
_accounts2clients.update(accounts_found)
except ConnectionRefusedError as ce:
_err = ce
@ -826,7 +819,8 @@ async def load_aio_clients(
yield client, _client_cache, _accounts2clients
except BaseException:
ib.disconnect()
for client in we_connected:
client.ib.disconnect()
raise
@ -834,14 +828,16 @@ async def _aio_run_client_method(
meth: str,
to_trio=None,
from_trio=None,
client=None,
**kwargs,
) -> None:
async with load_aio_clients() as (
client,
_client,
clients,
accts2clients,
):
client = client or _client
async_meth = getattr(client, meth)
# handle streaming methods
@ -855,7 +851,9 @@ async def _aio_run_client_method(
async def _trio_run_client_method(
method: str,
client: Optional[Client] = None,
**kwargs,
) -> None:
"""Asyncio entry point to run tasks against the ``ib_insync`` api.
@ -875,12 +873,12 @@ async def _trio_run_client_method(
):
kwargs['_treat_as_stream'] = True
result = await tractor.to_asyncio.run_task(
return await tractor.to_asyncio.run_task(
_aio_run_client_method,
meth=method,
client=client,
**kwargs
)
return result
class _MethodProxy:
@ -1371,11 +1369,11 @@ def pack_position(pos: Position) -> dict[str, Any]:
async def handle_order_requests(
ems_order_stream: tractor.MsgStream,
accounts_def: dict[str, str],
) -> None:
global _accounts2clients
accounts_def = config.load_accounts('ib')
# request_msg: dict
async for request_msg in ems_order_stream:
@ -1415,15 +1413,13 @@ async def handle_order_requests(
order = BrokerdOrder(**request_msg)
# call our client api to submit the order
reqid = await _trio_run_client_method(
method='submit_limit',
reqid = client.submit_limit(
oid=order.oid,
symbol=order.symbol,
price=order.price,
action=order.action,
size=order.size,
account=order.account,
account=acct_number,
# XXX: by default 0 tells ``ib_insync`` methods that
# there is no existing order so ask the client to create
@ -1446,11 +1442,7 @@ async def handle_order_requests(
elif action == 'cancel':
msg = BrokerdCancel(**request_msg)
await _trio_run_client_method(
method='submit_cancel',
reqid=msg.reqid
)
client.submit_cancel(reqid=msg.reqid)
else:
log.error(f'Unknown order command: {request_msg}')
@ -1467,15 +1459,24 @@ async def trades_dialogue(
# XXX: required to propagate ``tractor`` loglevel to piker logging
get_console_log(loglevel or tractor.current_actor().loglevel)
ib_trade_events_stream = await _trio_run_client_method(
method='recv_trade_updates',
)
accounts_def = config.load_accounts('ib')
global _accounts2clients
global _client_cache
# deliver positions to subscriber before anything else
all_positions = {}
clients: list[tuple[Client, trio.MemoryReceiveChannel]] = []
for account, client in _accounts2clients.items():
# each client to an api endpoint will have it's own event stream
trade_event_stream = await _trio_run_client_method(
method='recv_trade_updates',
client=client,
)
clients.append((client, trade_event_stream))
for client in _client_cache.values():
for pos in client.positions():
msg = pack_position(pos)
@ -1483,19 +1484,42 @@ async def trades_dialogue(
await ctx.started(all_positions)
action_map = {'BOT': 'buy', 'SLD': 'sell'}
async with (
ctx.open_stream() as ems_stream,
trio.open_nursery() as n,
):
# start order request handler **before** local trades event loop
n.start_soon(handle_order_requests, ems_stream)
n.start_soon(handle_order_requests, ems_stream, accounts_def)
# allocate event relay tasks for each client connection
for client, stream in clients:
n.start_soon(
deliver_trade_events,
stream,
ems_stream,
accounts_def
)
# block until cancelled
await trio.sleep_forever()
async def deliver_trade_events(
trade_event_stream: trio.MemoryReceiveChannel,
ems_stream: tractor.MsgStream,
accounts_def: dict[str, str],
) -> None:
'''Format and relay all trade events for a given client to the EMS.
'''
action_map = {'BOT': 'buy', 'SLD': 'sell'}
# TODO: for some reason we can receive a ``None`` here when the
# ib-gw goes down? Not sure exactly how that's happening looking
# at the eventkit code above but we should probably handle it...
async for event_name, item in ib_trade_events_stream:
async for event_name, item in trade_event_stream:
log.info(f'ib sending {event_name}:\n{pformat(item)}')
@ -1537,7 +1561,7 @@ async def trades_dialogue(
reqid=trade.order.orderId,
time_ns=time.time_ns(), # cuz why not
# account=client.
account=accounts_def.inverse[trade.order.account],
# everyone doin camel case..
status=status.status.lower(), # force lower case
@ -1605,7 +1629,8 @@ async def trades_dialogue(
if err['reqid'] == -1:
log.error(f'TWS external order error:\n{pformat(err)}')
# don't forward for now, it's unecessary.. but if we wanted to,
# TODO: what schema for this msg if we're going to make it
# portable across all backends?
# msg = BrokerdError(**err)
continue