Speedup: load provider searches async at startup
Tyler Goodlet
parent
c9cf72d554
commit
9bfc230dde
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@ -148,12 +148,14 @@ async def _setup_persistent_brokerd(
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async def allocate_persistent_feed(
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ctx: tractor.Context,
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bus: _FeedsBus,
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brokername: str,
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symbol: str,
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loglevel: str,
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task_status: TaskStatus[trio.CancelScope] = trio.TASK_STATUS_IGNORED,
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) -> None:
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try:
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@ -204,7 +206,6 @@ async def allocate_persistent_feed(
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bus.feeds[symbol] = (cs, init_msg, first_quote)
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if opened:
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# start history backfill task ``backfill_bars()`` is
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# a required backend func this must block until shm is
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# filled with first set of ohlc bars
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@ -243,9 +244,9 @@ async def attach_feed_bus(
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brokername: str,
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symbol: str,
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loglevel: str,
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) -> None:
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# try:
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if loglevel is None:
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loglevel = tractor.current_actor().loglevel
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@ -256,15 +257,15 @@ async def attach_feed_bus(
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assert 'brokerd' in tractor.current_actor().name
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bus = get_feed_bus(brokername)
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async with bus.task_lock:
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task_cs = bus.feeds.get(symbol)
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sub_only: bool = False
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entry = bus.feeds.get(symbol)
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# if no cached feed for this symbol has been created for this
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# brokerd yet, start persistent stream and shm writer task in
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# service nursery
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if task_cs is None:
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async with bus.task_lock:
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if entry is None:
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init_msg, first_quote = await bus.nursery.start(
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partial(
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allocate_persistent_feed,
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@ -276,6 +277,8 @@ async def attach_feed_bus(
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)
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)
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bus._subscribers.setdefault(symbol, []).append(ctx)
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assert isinstance(bus.feeds[symbol], tuple)
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else:
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sub_only = True
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@ -371,9 +374,9 @@ class Feed:
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# more then one?
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topics=['local_trades'],
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) as self._trade_stream:
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yield self._trade_stream
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else:
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yield self._trade_stream
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@ -386,9 +389,12 @@ def sym_to_shm_key(
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@asynccontextmanager
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async def install_brokerd_search(
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portal: tractor._portal.Portal,
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brokermod: ModuleType,
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) -> None:
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async with portal.open_context(
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brokermod.open_symbol_search
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) as (ctx, cache):
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@ -402,6 +408,7 @@ async def install_brokerd_search(
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return await stream.receive()
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async with _search.register_symbol_search(
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provider_name=brokermod.name,
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search_routine=search,
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pause_period=brokermod._search_conf.get('pause_period'),
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@ -412,18 +419,20 @@ async def install_brokerd_search(
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@asynccontextmanager
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async def open_feed(
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brokername: str,
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symbols: Sequence[str],
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loglevel: Optional[str] = None,
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) -> AsyncIterator[Dict[str, Any]]:
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"""Open a "data feed" which provides streamed real-time quotes.
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"""
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'''
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Open a "data feed" which provides streamed real-time quotes.
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'''
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sym = symbols[0].lower()
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# TODO: feed cache locking, right now this is causing
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# issues when reconncting to a long running emsd?
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# issues when reconnecting to a long running emsd?
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# global _searcher_cache
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# async with _cache_lock:
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@ -441,6 +450,7 @@ async def open_feed(
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mod = get_ingestormod(brokername)
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# no feed for broker exists so maybe spawn a data brokerd
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async with maybe_spawn_brokerd(
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brokername,
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loglevel=loglevel
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@ -497,12 +507,4 @@ async def open_feed(
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feed._max_sample_rate = max(ohlc_sample_rates)
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if brokername in _search._searcher_cache:
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yield feed
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else:
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async with install_brokerd_search(
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feed._brokerd_portal,
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mod,
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):
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yield feed
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@ -1480,7 +1480,6 @@ async def chart_symbol(
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f'tick:{symbol.tick_size}'
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)
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# await tractor.breakpoint()
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linked_charts = chart_app.linkedcharts
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linked_charts._symbol = symbol
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chart = linked_charts.plot_ohlc_main(symbol, bars)
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@ -1535,6 +1534,7 @@ async def chart_symbol(
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},
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})
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async with trio.open_nursery() as n:
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# load initial fsp chain (otherwise known as "indicators")
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@ -1558,9 +1558,8 @@ async def chart_symbol(
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)
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# wait for a first quote before we start any update tasks
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quote = await feed.receive()
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log.info(f'Received first quote {quote}')
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# quote = await feed.receive()
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# log.info(f'Received first quote {quote}')
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n.start_soon(
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check_for_new_bars,
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@ -1581,6 +1580,41 @@ async def chart_symbol(
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await start_order_mode(chart, symbol, brokername)
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async def load_providers(
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brokernames: list[str],
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loglevel: str,
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) -> None:
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# TODO: seems like our incentive for brokerd caching lelel
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backends = {}
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async with AsyncExitStack() as stack:
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# TODO: spawn these async in nursery.
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# load all requested brokerd's at startup and load their
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# search engines.
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for broker in brokernames:
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# spin up broker daemons for each provider
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portal = await stack.enter_async_context(
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maybe_spawn_brokerd(
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broker,
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loglevel=loglevel
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)
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)
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backends[broker] = portal
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await stack.enter_async_context(
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feed.install_brokerd_search(
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portal,
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get_brokermod(broker),
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)
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)
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# keep search engines up until cancelled
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await trio.sleep_forever()
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async def _async_main(
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# implicit required argument provided by ``qtractor_run()``
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widgets: Dict[str, Any],
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@ -1644,31 +1678,9 @@ async def _async_main(
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# this internally starts a ``chart_symbol()`` task above
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chart_app.load_symbol(provider, symbol, loglevel)
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# TODO: seems like our incentive for brokerd caching lelel
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backends = {}
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async with AsyncExitStack() as stack:
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# TODO: spawn these async in nursery.
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# load all requested brokerd's at startup and load their
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# search engines.
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for broker in brokernames:
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portal = await stack.enter_async_context(
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maybe_spawn_brokerd(
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broker,
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loglevel=loglevel
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)
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)
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backends[broker] = portal
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await stack.enter_async_context(
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feed.install_brokerd_search(
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portal,
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get_brokermod(broker),
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)
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)
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root_n.start_soon(load_providers, brokernames, loglevel)
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# spin up a search engine for the local cached symbol set
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async with _search.register_symbol_search(
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provider_name='cache',
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@ -1678,6 +1690,7 @@ async def _async_main(
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),
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):
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# start handling search bar kb inputs
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async with open_key_stream(
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search.bar,
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) as key_stream:
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