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Attach to order client *after* feed connection to speed up the startup time

syseng_tweaks
Tyler Goodlet 2021-05-24 12:09:03 -04:00
parent 319eacd8c1
commit f51e12819a
1 changed files with 31 additions and 29 deletions
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60
piker/clearing/_ems.py
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@ -242,19 +242,20 @@ async def execute_triggers(
async def exec_loop( async def exec_loop(
ctx: tractor.Context, ctx: tractor.Context,
feed: 'Feed', # noqa feed: 'Feed', # noqa
broker: str, broker: str,
symbol: str, symbol: str,
_exec_mode: str, _exec_mode: str,
task_status: TaskStatus[dict] = trio.TASK_STATUS_IGNORED, task_status: TaskStatus[dict] = trio.TASK_STATUS_IGNORED,
) -> AsyncIterator[dict]: ) -> AsyncIterator[dict]:
"""Main scan loop for order execution conditions and submission """Main scan loop for order execution conditions and submission
to brokers. to brokers.
""" """
# XXX: this should be initial price quote from target provider
# TODO: get initial price quote from target broker
first_quote = await feed.receive() first_quote = await feed.receive()
book = get_dark_book(broker) book = get_dark_book(broker)
@ -351,6 +352,7 @@ async def process_broker_trades(
# TODO: make this a context # TODO: make this a context
# in the paper engine case this is just a mem receive channel # in the paper engine case this is just a mem receive channel
async with feed.receive_trades_data() as trades_stream: async with feed.receive_trades_data() as trades_stream:
first = await trades_stream.__anext__() first = await trades_stream.__anext__()
# startup msg expected as first from broker backend # startup msg expected as first from broker backend
@ -651,35 +653,18 @@ async def _emsd_main(
dark_book = get_dark_book(broker) dark_book = get_dark_book(broker)
# get a portal back to the client # spawn one task per broker feed
async with tractor.wait_for_actor(client_actor_name) as portal: async with trio.open_nursery() as n:
# spawn one task per broker feed # TODO: eventually support N-brokers
async with trio.open_nursery() as n: async with data.open_feed(
broker,
[symbol],
loglevel='info',
) as feed:
# TODO: eventually support N-brokers # get a portal back to the client
async with data.open_feed( async with tractor.wait_for_actor(client_actor_name) as portal:
broker,
[symbol],
loglevel='info',
) as feed:
# start the condition scan loop
quote, feed, client = await n.start(
exec_loop,
ctx,
feed,
broker,
symbol,
_mode,
)
await n.start(
process_broker_trades,
ctx,
feed,
dark_book,
)
# connect back to the calling actor (the one that is # connect back to the calling actor (the one that is
# acting as an EMS client and will submit orders) to # acting as an EMS client and will submit orders) to
@ -690,6 +675,23 @@ async def _emsd_main(
symbol_key=symbol, symbol_key=symbol,
) as order_stream: ) as order_stream:
# start the condition scan loop
quote, feed, client = await n.start(
exec_loop,
ctx,
feed,
broker,
symbol,
_mode,
)
await n.start(
process_broker_trades,
ctx,
feed,
dark_book,
)
# start inbound order request processing # start inbound order request processing
await process_order_cmds( await process_order_cmds(
ctx, ctx,