Update the `_emsd_main()` doc task tree layout
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@ -216,8 +216,8 @@ async def open_ems(
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loglevel: str = 'error',
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) -> tuple[
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OrderClient,
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tractor.MsgStream,
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OrderClient, # client
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tractor.MsgStream, # order ctl stream
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dict[
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# brokername, acctid
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tuple[str, str],
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@ -1529,30 +1529,34 @@ async def _emsd_main(
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received in a stream from that client actor and then responses are
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streamed back up to the original calling task in the same client.
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The primary ``emsd`` task trees are:
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The primary ``emsd`` task tree is:
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- ``_setup_persistent_emsd()``:
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is the ``emsd`` actor's primary root task which sets up an
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actor-global ``Router`` instance and starts a relay loop task
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which lives until the backend broker is shutdown or the ems is
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terminated.
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- (maybe) ``translate_and_relay_brokerd_events()``:
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accept normalized trades responses from brokerd, process and
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relay to ems client(s); this is a effectively a "trade event
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reponse" proxy-broker.
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- ``_emsd_main()``:
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attaches a brokerd real-time quote feed and trades dialogue with
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brokderd trading api for every connecting client.
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- ``clear_dark_triggers()``:
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run (dark order) conditions on inputs and trigger brokerd "live"
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order submissions.
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- ``process_client_order_cmds()``:
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accepts order cmds from requesting clients, registers dark orders and
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alerts with clearing loop.
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is the ``emsd`` actor's primary *service-fixture* task which
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is opened by the `pikerd` service manager and sets up
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a process-global (actor-local) ``Router`` instance and opens
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a service nursery which lives until the backend broker is
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shutdown or the ems is terminated; all tasks are
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*dynamically* started (and persisted) within this service
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nursery when the below endpoint context is opened:
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- ``_emsd_main()``:
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attaches a real-time quote feed and trades dialogue with
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a `brokerd` actor which connects to the backend broker's
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trading api for every connecting client.
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- ``clear_dark_triggers()``:
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run (dark order) conditions on inputs and trigger brokerd
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"live" order submissions.
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- ``process_client_order_cmds()``:
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accepts order cmds from requesting clients, registers
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dark orders and alerts with above (dark) clearing loop.
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- (maybe) ``translate_and_relay_brokerd_events()``:
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accept normalized trades responses from brokerd, process and
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relay to ems client(s); this is a effectively a "trade event
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reponse" proxy-broker.
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'''
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global _router
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@ -1560,9 +1564,9 @@ async def _emsd_main(
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broker, _, _, _ = unpack_fqme(fqme)
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# TODO: would be nice if in tractor we can require either a ctx arg,
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# or a named arg with ctx in it and a type annotation of
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# tractor.Context instead of strictly requiring a ctx arg.
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# TODO: would be nice if in tractor we can require either a ctx
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# arg, or a named arg with ctx in it and a type annotation of
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# `tractor.Context` instead of strictly requiring a ctx arg.
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ems_ctx = ctx
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# spawn one task per broker feed
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