data._web_bs: try to raise jsonrpc errors in parent task

Since `tractor`'s new and improved inter-actor cancellation semantics
are much more pedantic, AND bc we use the `ServiceMngr` for spawning
service actors on-demand, the caller of `maybe_spawn_daemon()` should
NEVER conduct a so called "out of band" `Actor`-runtime cancel request
since this is precisely the job of our `ServiceMngr` XD

Add a super in depth note explaining the underlying issue and adding
a todo list of how we should prolly augment `tractor` to make such cases
easier to grok and fix in the future!

default.nix

@@ -0,0 +1,134 @@
+with (import <nixpkgs> {});
+let
+  glibStorePath = lib.getLib glib;
+  zlibStorePath = lib.getLib zlib;
+  zstdStorePath = lib.getLib zstd;
+  dbusStorePath = lib.getLib dbus;
+  libGLStorePath = lib.getLib libGL;
+  freetypeStorePath = lib.getLib freetype;
+  qt6baseStorePath = lib.getLib qt6.qtbase;
+  fontconfigStorePath = lib.getLib fontconfig;
+  libxkbcommonStorePath = lib.getLib libxkbcommon;
+  xcbutilcursorStorePath = lib.getLib xcb-util-cursor;
+
+  qtpyStorePath = lib.getLib python312Packages.qtpy;
+  pyqt6StorePath = lib.getLib python312Packages.pyqt6;
+  pyqt6SipStorePath = lib.getLib python312Packages.pyqt6-sip;
+  rapidfuzzStorePath = lib.getLib python312Packages.rapidfuzz;
+  qdarkstyleStorePath = lib.getLib python312Packages.qdarkstyle;
+
+  xorgLibX11StorePath = lib.getLib xorg.libX11;
+  xorgLibxcbStorePath = lib.getLib xorg.libxcb;
+  xorgxcbutilwmStorePath = lib.getLib xorg.xcbutilwm;
+  xorgxcbutilimageStorePath = lib.getLib xorg.xcbutilimage;
+  xorgxcbutilerrorsStorePath = lib.getLib xorg.xcbutilerrors;
+  xorgxcbutilkeysymsStorePath = lib.getLib xorg.xcbutilkeysyms;
+  xorgxcbutilrenderutilStorePath = lib.getLib xorg.xcbutilrenderutil;
+in
+stdenv.mkDerivation {
+  name = "piker-qt6-uv";
+  buildInputs = [
+    # System requirements.
+    glib
+    zlib
+    dbus
+    zstd
+    libGL
+    freetype
+    qt6.qtbase
+    libgcc.lib
+    fontconfig
+    libxkbcommon
+
+    # Xorg requirements
+    xcb-util-cursor
+    xorg.libxcb
+    xorg.libX11
+    xorg.xcbutilwm
+    xorg.xcbutilimage
+    xorg.xcbutilerrors
+    xorg.xcbutilkeysyms
+    xorg.xcbutilrenderutil
+
+    # Python requirements.
+    python312Full
+    python312Packages.uv
+    python312Packages.qdarkstyle
+    python312Packages.rapidfuzz
+    python312Packages.pyqt6
+    python312Packages.qtpy
+  ];
+  src = null;
+  shellHook = ''
+    set -e
+
+    # Set the Qt plugin path
+    # export QT_DEBUG_PLUGINS=1
+
+    QTBASE_PATH="${qt6baseStorePath}/lib"
+    QT_PLUGIN_PATH="$QTBASE_PATH/qt-6/plugins"
+    QT_QPA_PLATFORM_PLUGIN_PATH="$QT_PLUGIN_PATH/platforms"
+
+    LIB_GCC_PATH="${libgcc.lib}/lib"
+    GLIB_PATH="${glibStorePath}/lib"
+    ZSTD_PATH="${zstdStorePath}/lib"
+    ZLIB_PATH="${zlibStorePath}/lib"
+    DBUS_PATH="${dbusStorePath}/lib"
+    LIBGL_PATH="${libGLStorePath}/lib"
+    FREETYPE_PATH="${freetypeStorePath}/lib"
+    FONTCONFIG_PATH="${fontconfigStorePath}/lib"
+    LIB_XKB_COMMON_PATH="${libxkbcommonStorePath}/lib"
+
+    XCB_UTIL_CURSOR_PATH="${xcbutilcursorStorePath}/lib"
+    XORG_LIB_X11_PATH="${xorgLibX11StorePath}/lib"
+    XORG_LIB_XCB_PATH="${xorgLibxcbStorePath}/lib"
+    XORG_XCB_UTIL_IMAGE_PATH="${xorgxcbutilimageStorePath}/lib"
+    XORG_XCB_UTIL_WM_PATH="${xorgxcbutilwmStorePath}/lib"
+    XORG_XCB_UTIL_RENDER_UTIL_PATH="${xorgxcbutilrenderutilStorePath}/lib"
+    XORG_XCB_UTIL_KEYSYMS_PATH="${xorgxcbutilkeysymsStorePath}/lib"
+    XORG_XCB_UTIL_ERRORS_PATH="${xorgxcbutilerrorsStorePath}/lib"
+
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$QTBASE_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$QT_PLUGIN_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$QT_QPA_PLATFORM_PLUGIN_PATH"
+
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$LIB_GCC_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$DBUS_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$GLIB_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$ZLIB_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$ZSTD_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$LIBGL_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$FONTCONFIG_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$FREETYPE_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$LIB_XKB_COMMON_PATH"
+
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XCB_UTIL_CURSOR_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_LIB_X11_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_LIB_XCB_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_XCB_UTIL_IMAGE_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_XCB_UTIL_WM_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_XCB_UTIL_RENDER_UTIL_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_XCB_UTIL_KEYSYMS_PATH"
+    LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$XORG_XCB_UTIL_ERRORS_PATH"
+
+    export LD_LIBRARY_PATH
+
+    RPDFUZZ_PATH="${rapidfuzzStorePath}/lib/python3.12/site-packages"
+    QDRKSTYLE_PATH="${qdarkstyleStorePath}/lib/python3.12/site-packages"
+    QTPY_PATH="${qtpyStorePath}/lib/python3.12/site-packages"
+    PYQT6_PATH="${pyqt6StorePath}/lib/python3.12/site-packages"
+    PYQT6_SIP_PATH="${pyqt6SipStorePath}/lib/python3.12/site-packages"
+
+    PATCH="$PATCH:$RPDFUZZ_PATH"
+    PATCH="$PATCH:$QDRKSTYLE_PATH"
+    PATCH="$PATCH:$QTPY_PATH"
+    PATCH="$PATCH:$PYQT6_PATH"
+    PATCH="$PATCH:$PYQT6_SIP_PATH"
+
+    export PATCH
+
+    # Install deps
+    uv lock
+
+  '';
+}

piker/brokers/_daemon.py

@@ -23,6 +23,7 @@ from __future__ import annotations
 from contextlib import (
     asynccontextmanager as acm,
 )
+from functools import partial
 from types import ModuleType
 from typing import (
     TYPE_CHECKING,
@@ -190,14 +191,17 @@ def broker_init(
 
 
 async def spawn_brokerd(
-
     brokername: str,
     loglevel: str | None = None,
 
     **tractor_kwargs,
 
 ) -> bool:
+    '''
+    Spawn a `brokerd.<backendname>` subactor service daemon
+    using `pikerd`'s service mngr.
 
+    '''
     from piker.service._util import log  # use service mngr log
     log.info(f'Spawning {brokername} broker daemon')
 
@@ -217,27 +221,35 @@ async def spawn_brokerd(
 
     # ask `pikerd` to spawn a new sub-actor and manage it under its
     # actor nursery
-    from piker.service import Services
-
+    from piker.service import (
+        get_service_mngr,
+        ServiceMngr,
+    )
     dname: str = tractor_kwargs.pop('name')  # f'brokerd.{brokername}'
-    portal = await Services.actor_n.start_actor(
-        dname,
-        enable_modules=_data_mods + tractor_kwargs.pop('enable_modules'),
-        debug_mode=Services.debug_mode,
+    mngr: ServiceMngr = get_service_mngr()
+    ctx: tractor.Context = await mngr.start_service(
+        daemon_name=dname,
+        ctx_ep=partial(
+            # signature of target root-task endpoint
+            daemon_fixture_ep,
+
+            # passed to daemon_fixture_ep(**kwargs)
+            brokername=brokername,
+            loglevel=loglevel,
+        ),
+        debug_mode=mngr.debug_mode,
+        loglevel=loglevel,
+        enable_modules=(
+            _data_mods
+            +
+            tractor_kwargs.pop('enable_modules')
+        ),
         **tractor_kwargs
     )
-
-    # NOTE: the service mngr expects an already spawned actor + its
-    # portal ref in order to do non-blocking setup of brokerd
-    # service nursery.
-    await Services.start_service_task(
-        dname,
-        portal,
-
-        # signature of target root-task endpoint
-        daemon_fixture_ep,
-        brokername=brokername,
-        loglevel=loglevel,
+    assert (
+        not ctx.cancel_called
+        and ctx.portal  # parent side
+        and dname in ctx.chan.uid  # subactor is named as desired
     )
     return True
 
@@ -262,8 +274,7 @@ async def maybe_spawn_brokerd(
     from piker.service import maybe_spawn_daemon
 
     async with maybe_spawn_daemon(
-
-        f'brokerd.{brokername}',
+        service_name=f'brokerd.{brokername}',
         service_task_target=spawn_brokerd,
         spawn_args={
             'brokername': brokername,

piker/brokers/binance/api.py

@@ -567,6 +567,7 @@ class Client:
     ) -> str:
         return {
             'USDTM': 'usdtm_futes',
+            'SPOT': 'spot',
             # 'COINM': 'coin_futes',
             # ^-TODO-^ bc someone might want it..?
         }[pair.venue]

piker/cli/__init__.py

@@ -335,7 +335,7 @@ def services(config, tl, ports):
                 name='service_query',
                 loglevel=config['loglevel'] if tl else None,
             ),
-            tractor.get_arbiter(
+            tractor.get_registry(
                 host=host,
                 port=ports[0]
             ) as portal

piker/data/_sampling.py

@@ -25,6 +25,7 @@ from collections import (
     defaultdict,
 )
 from contextlib import asynccontextmanager as acm
+from functools import partial
 import time
 from typing import (
     Any,
@@ -42,7 +43,7 @@ from tractor.trionics import (
     maybe_open_nursery,
 )
 import trio
-from trio_typing import TaskStatus
+from trio import TaskStatus
 
 from .ticktools import (
     frame_ticks,
@@ -70,6 +71,7 @@ if TYPE_CHECKING:
 _default_delay_s: float = 1.0
 
 
+# TODO: use new `tractor.singleton_acm` API for this!
 class Sampler:
     '''
     Global sampling engine registry.
@@ -79,9 +81,9 @@ class Sampler:
 
     This non-instantiated type is meant to be a singleton within
     a `samplerd` actor-service spawned once by the user wishing to
-    time-step-sample (real-time) quote feeds, see
-    ``.service.maybe_open_samplerd()`` and the below
-    ``register_with_sampler()``.
+    time-step-sample a (real-time) quote feeds, see
+    `.service.maybe_open_samplerd()` and the below
+    `register_with_sampler()`.
 
     '''
     service_nursery: None | trio.Nursery = None
@@ -375,7 +377,10 @@ async def register_with_sampler(
                 assert Sampler.ohlcv_shms
 
             # unblock caller
-            await ctx.started(set(Sampler.ohlcv_shms.keys()))
+            await ctx.started(
+                # XXX bc msgpack only allows one array type!
+                list(Sampler.ohlcv_shms.keys())
+            )
 
             if open_index_stream:
                 try:
@@ -419,7 +424,6 @@ async def register_with_sampler(
 
 
 async def spawn_samplerd(
-
     loglevel: str | None = None,
     **extra_tractor_kwargs
 
@@ -429,7 +433,10 @@ async def spawn_samplerd(
     update and increment count write and stream broadcasting.
 
     '''
-    from piker.service import Services
+    from piker.service import (
+        get_service_mngr,
+        ServiceMngr,
+    )
 
     dname = 'samplerd'
     log.info(f'Spawning `{dname}`')
@@ -437,26 +444,33 @@ async def spawn_samplerd(
     # singleton lock creation of ``samplerd`` since we only ever want
     # one daemon per ``pikerd`` proc tree.
     # TODO: make this built-into the service api?
-    async with Services.locks[dname + '_singleton']:
+    mngr: ServiceMngr = get_service_mngr()
+    already_started: bool = dname in mngr.service_tasks
 
-        if dname not in Services.service_tasks:
-
-            portal = await Services.actor_n.start_actor(
-                dname,
-                enable_modules=[
-                    'piker.data._sampling',
-                ],
-                loglevel=loglevel,
-                debug_mode=Services.debug_mode,  # set by pikerd flag
-                **extra_tractor_kwargs
-            )
-
-            await Services.start_service_task(
-                dname,
-                portal,
+    async with mngr._locks[dname + '_singleton']:
+        ctx: Context = await mngr.start_service(
+            daemon_name=dname,
+            ctx_ep=partial(
                 register_with_sampler,
                 period_s=1,
                 sub_for_broadcasts=False,
+            ),
+            debug_mode=mngr.debug_mode,  # set by pikerd flag
+
+            # proxy-through to tractor
+            enable_modules=[
+                'piker.data._sampling',
+            ],
+            loglevel=loglevel,
+            **extra_tractor_kwargs
+        )
+        if not already_started:
+            assert (
+                ctx
+                and
+                ctx.portal
+                and
+                not ctx.cancel_called
             )
             return True
 
@@ -889,6 +903,7 @@ async def uniform_rate_send(
             # to consumers which crash or lose network connection.
             # I.e. we **DO NOT** want to crash and propagate up to
             # ``pikerd`` these kinds of errors!
+            trio.EndOfChannel,
             trio.ClosedResourceError,
             trio.BrokenResourceError,
             ConnectionResetError,

piker/data/_web_bs.py

@@ -273,7 +273,7 @@ async def _reconnect_forever(
                 nobsws._connected.set()
                 await trio.sleep_forever()
         except HandshakeError:
-            log.exception(f'Retrying connection')
+            log.exception('Retrying connection')
 
         # ws & nursery block ends
 
@@ -359,8 +359,8 @@ async def open_autorecon_ws(
 
 
 '''
-JSONRPC response-request style machinery for transparent multiplexing of msgs
-over a NoBsWs.
+JSONRPC response-request style machinery for transparent multiplexing
+of msgs over a NoBsWs.
 
 '''
 
@@ -377,16 +377,20 @@ async def open_jsonrpc_session(
     url: str,
     start_id: int = 0,
     response_type: type = JSONRPCResult,
-    request_type: Optional[type] = None,
-    request_hook: Optional[Callable] = None,
-    error_hook: Optional[Callable] = None,
+    # request_type: Optional[type] = None,
+    # request_hook: Optional[Callable] = None,
+    # error_hook: Optional[Callable] = None,
 ) -> Callable[[str, dict], dict]:
 
+    # NOTE, store all request msgs so we can raise errors on the
+    # caller side!
+    req_msgs: dict[int, dict] = {}
+
     async with (
         trio.open_nursery() as n,
         open_autorecon_ws(url) as ws
     ):
-        rpc_id: Iterable = count(start_id)
+        rpc_id: Iterable[int] = count(start_id)
         rpc_results: dict[int, dict] = {}
 
         async def json_rpc(method: str, params: dict) -> dict:
@@ -394,26 +398,40 @@ async def open_jsonrpc_session(
             perform a json rpc call and wait for the result, raise exception in
             case of error field present on response
             '''
+            nonlocal req_msgs
+
+            req_id: int = next(rpc_id)
             msg = {
                 'jsonrpc': '2.0',
-                'id': next(rpc_id),
+                'id': req_id,
                 'method': method,
                 'params': params
             }
             _id = msg['id']
 
-            rpc_results[_id] = {
+            result = rpc_results[_id] = {
                 'result': None,
-                'event': trio.Event()
+                'error': None,
+                'event': trio.Event(),  # signal caller resp arrived
             }
+            req_msgs[_id] = msg
 
             await ws.send_msg(msg)
 
+            # wait for reponse before unblocking requester code
             await rpc_results[_id]['event'].wait()
 
-            ret = rpc_results[_id]['result']
+            if (maybe_result := result['result']):
+                ret = maybe_result
+                del rpc_results[_id]
 
-            del rpc_results[_id]
+            else:
+                err = result['error']
+                raise Exception(
+                    f'JSONRPC request failed\n'
+                    f'req: {msg}\n'
+                    f'resp: {err}\n'
+                )
 
             if ret.error is not None:
                 raise Exception(json.dumps(ret.error, indent=4))
@@ -428,6 +446,7 @@ async def open_jsonrpc_session(
             the server side.
 
             '''
+            nonlocal req_msgs
             async for msg in ws:
                 match msg:
                     case {
@@ -451,15 +470,29 @@ async def open_jsonrpc_session(
                         'params': _,
                     }:
                         log.debug(f'Recieved\n{msg}')
-                        if request_hook:
-                            await request_hook(request_type(**msg))
+                        # if request_hook:
+                        #     await request_hook(request_type(**msg))
 
                     case {
                         'error': error
                     }:
-                        log.warning(f'Recieved\n{error}')
-                        if error_hook:
-                            await error_hook(response_type(**msg))
+                        # if error_hook:
+                        #     await error_hook(response_type(**msg))
+
+                        # retreive orig request msg, set error
+                        # response in original "result" msg,
+                        # THEN FINALLY set the event to signal caller
+                        # to raise the error in the parent task.
+                        req_id: int = error['id']
+                        req_msg: dict = req_msgs[req_id]
+                        result: dict = rpc_results[req_id]
+                        result['error'] = error
+                        result['event'].set()
+                        log.error(
+                            f'JSONRPC request failed\n'
+                            f'req: {req_msg}\n'
+                            f'resp: {error}\n'
+                        )
 
                     case _:
                         log.warning(f'Unhandled JSON-RPC msg!?\n{msg}')

piker/service/__init__.py

@@ -30,7 +30,11 @@ Actor runtime primtives and (distributed) service APIs for,
   => TODO: maybe to (re)move elsewhere?
 
 '''
-from ._mngr import Services as Services
+from ._mngr import (
+    get_service_mngr as get_service_mngr,
+    open_service_mngr as open_service_mngr,
+    ServiceMngr as ServiceMngr,
+)
 from ._registry import (
     _tractor_kwargs as _tractor_kwargs,
     _default_reg_addr as _default_reg_addr,

piker/service/_actor_runtime.py

@@ -21,7 +21,6 @@
 from __future__ import annotations
 import os
 from typing import (
-    Optional,
     Any,
     ClassVar,
 )
@@ -30,13 +29,13 @@ from contextlib import (
 )
 
 import tractor
-import trio
 
 from ._util import (
     get_console_log,
 )
 from ._mngr import (
-    Services,
+    open_service_mngr,
+    ServiceMngr,
 )
 from ._registry import (  # noqa
     _tractor_kwargs,
@@ -59,7 +58,7 @@ async def open_piker_runtime(
     registry_addrs: list[tuple[str, int]] = [],
 
     enable_modules: list[str] = [],
-    loglevel: Optional[str] = None,
+    loglevel: str|None = None,
 
     # XXX NOTE XXX: you should pretty much never want debug mode
     # for data daemons when running in production.
@@ -69,7 +68,7 @@ async def open_piker_runtime(
     # and spawn the service tree distributed per that.
     start_method: str = 'trio',
 
-    tractor_runtime_overrides: dict | None = None,
+    tractor_runtime_overrides: dict|None = None,
     **tractor_kwargs,
 
 ) -> tuple[
@@ -119,6 +118,10 @@ async def open_piker_runtime(
                 # spawn other specialized daemons I think?
                 enable_modules=enable_modules,
 
+                # TODO: how to configure this?
+                # keep it on by default if debug mode is set?
+                # maybe_enable_greenback=debug_mode,
+
                 **tractor_kwargs,
             ) as actor,
 
@@ -167,12 +170,13 @@ async def open_pikerd(
 
     **kwargs,
 
-) -> Services:
+) -> ServiceMngr:
     '''
-    Start a root piker daemon with an indefinite lifetime.
+    Start a root piker daemon actor (aka `pikerd`) with an indefinite
+    lifetime.
 
-    A root actor nursery is created which can be used to create and keep
-    alive underling services (see below).
+    A root actor-nursery is created which can be used to spawn and
+    supervise underling service sub-actors (see below).
 
     '''
     # NOTE: for the root daemon we always enable the root
@@ -199,8 +203,6 @@ async def open_pikerd(
             root_actor,
             reg_addrs,
         ),
-        tractor.open_nursery() as actor_nursery,
-        trio.open_nursery() as service_nursery,
     ):
         for addr in reg_addrs:
             if addr not in root_actor.accept_addrs:
@@ -209,25 +211,17 @@ async def open_pikerd(
                     'Maybe you have another daemon already running?'
                 )
 
-        # assign globally for future daemon/task creation
-        Services.actor_n = actor_nursery
-        Services.service_n = service_nursery
-        Services.debug_mode = debug_mode
-
-        try:
-            yield Services
-
-        finally:
-            # TODO: is this more clever/efficient?
-            # if 'samplerd' in Services.service_tasks:
-            #     await Services.cancel_service('samplerd')
-            service_nursery.cancel_scope.cancel()
+        mngr: ServiceMngr
+        async with open_service_mngr(
+            debug_mode=debug_mode,
+        ) as mngr:
+            yield mngr
 
 
 # TODO: do we even need this?
 # @acm
 # async def maybe_open_runtime(
-#     loglevel: Optional[str] = None,
+#     loglevel: str|None = None,
 #     **kwargs,
 
 # ) -> None:
@@ -256,7 +250,7 @@ async def maybe_open_pikerd(
     loglevel: str | None = None,
     **kwargs,
 
-) -> tractor._portal.Portal | ClassVar[Services]:
+) -> tractor._portal.Portal | ClassVar[ServiceMngr]:
     '''
     If no ``pikerd`` daemon-root-actor can be found start it and
     yield up (we should probably figure out returning a portal to self

piker/service/_ahab.py

@@ -49,7 +49,7 @@ from requests.exceptions import (
     ReadTimeout,
 )
 
-from ._mngr import Services
+from ._mngr import ServiceMngr
 from ._util import (
     log,  # sub-sys logger
     get_console_log,
@@ -453,7 +453,7 @@ async def open_ahabd(
 
 @acm
 async def start_ahab_service(
-    services: Services,
+    services: ServiceMngr,
     service_name: str,
 
     # endpoint config passed as **kwargs
@@ -549,7 +549,8 @@ async def start_ahab_service(
         log.warning('Failed to cancel root permsed container')
 
     except (
-        trio.MultiError,
+        # trio.MultiError,
+        ExceptionGroup,
     ) as err:
         for subexc in err.exceptions:
             if isinstance(subexc, PermissionError):

piker/service/_daemon.py

@@ -26,14 +26,17 @@ from typing import (
 from contextlib import (
     asynccontextmanager as acm,
 )
+from collections import defaultdict
 
 import tractor
+import trio
 
 from ._util import (
     log,  # sub-sys logger
 )
 from ._mngr import (
-    Services,
+    get_service_mngr,
+    ServiceMngr,
 )
 from ._actor_runtime import maybe_open_pikerd
 from ._registry import find_service
@@ -41,15 +44,14 @@ from ._registry import find_service
 
 @acm
 async def maybe_spawn_daemon(
-
     service_name: str,
     service_task_target: Callable,
-
     spawn_args: dict[str, Any],
 
     loglevel: str | None = None,
     singleton: bool = False,
 
+    _locks = defaultdict(trio.Lock),
     **pikerd_kwargs,
 
 ) -> tractor.Portal:
@@ -67,7 +69,7 @@ async def maybe_spawn_daemon(
     '''
     # serialize access to this section to avoid
     # 2 or more tasks racing to create a daemon
-    lock = Services.locks[service_name]
+    lock = _locks[service_name]
     await lock.acquire()
 
     async with find_service(
@@ -132,7 +134,65 @@ async def maybe_spawn_daemon(
         async with tractor.wait_for_actor(service_name) as portal:
             lock.release()
             yield portal
-            await portal.cancel_actor()
+            # --- ---- ---
+            # XXX NOTE XXX
+            # --- ---- ---
+            # DO NOT PUT A `portal.cancel_actor()` here (as was prior)!
+            #
+            # Doing so will cause an "out-of-band" ctxc
+            # (`tractor.ContextCancelled`) to be raised inside the
+            # `ServiceMngr.open_context_in_task()`'s call to
+            # `ctx.wait_for_result()` AND the internal self-ctxc
+            # "graceful capture" WILL NOT CATCH IT!
+            #
+            # This can cause certain types of operations to raise
+            # that ctxc BEFORE THEY `return`, resulting in
+            # a "false-negative" ctxc being raised when really
+            # nothing actually failed, other then our semantic
+            # "failure" to suppress an expected, graceful,
+            # self-cancel scenario..
+            #
+            # bUt wHy duZ It WorK lIKe dis..
+            # ------------------------------
+            # from the perspective of the `tractor.Context` this
+            # cancel request was conducted "out of band" since
+            # `Context.cancel()` was never called and thus the
+            # `._cancel_called: bool` was never set. Despite the
+            # remote `.canceller` being set to `pikerd` (i.e. the
+            # same `Actor.uid` of the raising service-mngr task) the
+            # service-task's ctx itself was never marked as having
+            # requested cancellation and thus still raises the ctxc
+            # bc it was unaware of any such request.
+            #
+            # How to make grokin these cases easier tho?
+            # ------------------------------------------
+            # Because `Portal.cancel_actor()` was called it requests
+            # "full-`Actor`-runtime-cancellation" of it's peer
+            # process which IS NOT THE SAME as a single inter-actor
+            # RPC task cancelling its local context with a remote
+            # peer `Task` in that same peer process.
+            #
+            # ?TODO? It might be better if we do one (or all) of the
+            # following:
+            #
+            # -[ ] at least set a special message for the
+            #    `ContextCancelled` when raised locally by the
+            #    unaware ctx task such that we check for the
+            #    `.canceller` being *our `Actor`* and in the case
+            #    where `Context._cancel_called == False` we specially
+            #    note that this is likely an "out-of-band"
+            #    runtime-cancel request triggered by some call to
+            #    `Portal.cancel_actor()`, possibly even reporting the
+            #    exact LOC of that caller by tracking it inside our
+            #    portal-type?
+            # -[ ] possibly add another field `ContextCancelled` like
+            #    maybe a,
+            #    `.request_type: Literal['os', 'proc', 'actor',
+            #    'ctx']` type thing which would allow immediately
+            #    being able to tell what kind of cancellation caused
+            #    the unexpected ctxc?
+            # -[ ] REMOVE THIS COMMENT, once we've settled on how to
+            #     better augment `tractor` to be more explicit on this!
 
 
 async def spawn_emsd(
@@ -147,21 +207,22 @@ async def spawn_emsd(
     """
     log.info('Spawning emsd')
 
-    portal = await Services.actor_n.start_actor(
+    smngr: ServiceMngr = get_service_mngr()
+    portal = await smngr.actor_n.start_actor(
         'emsd',
         enable_modules=[
             'piker.clearing._ems',
             'piker.clearing._client',
         ],
         loglevel=loglevel,
-        debug_mode=Services.debug_mode,  # set by pikerd flag
+        debug_mode=smngr.debug_mode,  # set by pikerd flag
         **extra_tractor_kwargs
     )
 
     # non-blocking setup of clearing service
     from ..clearing._ems import _setup_persistent_emsd
 
-    await Services.start_service_task(
+    await smngr.start_service_task(
         'emsd',
         portal,
 

piker/service/_mngr.py

@@ -18,16 +18,29 @@
 daemon-service management API.
 
 """
+from __future__ import annotations
+from contextlib import (
+    asynccontextmanager as acm,
+    # contextmanager as cm,
+)
 from collections import defaultdict
+from dataclasses import (
+    dataclass,
+    field,
+)
+import functools
+import inspect
 from typing import (
     Callable,
     Any,
 )
 
-import trio
-from trio_typing import TaskStatus
+import msgspec
 import tractor
+import trio
+from trio import TaskStatus
 from tractor import (
+    ActorNursery,
     current_actor,
     ContextCancelled,
     Context,
@@ -39,6 +52,130 @@ from ._util import (
 )
 
 
+# TODO: implement a singleton deco-API for wrapping the below
+# factory's impl for general actor-singleton use?
+#
+# @singleton
+# async def open_service_mngr(
+#     **init_kwargs,
+# ) -> ServiceMngr:
+#     '''
+#     Note this function body is invoke IFF no existing singleton instance already
+#     exists in this proc's memory.
+
+#     '''
+#     # setup
+#     yield ServiceMngr(**init_kwargs)
+#     # teardown
+
+
+
+# TODO: singleton factory API instead of a class API
+@acm
+async def open_service_mngr(
+    *,
+    debug_mode: bool = False,
+
+    # impl deat which ensures a single global instance
+    _singleton: list[ServiceMngr|None] = [None],
+    **init_kwargs,
+
+) -> ServiceMngr:
+    '''
+    Open a multi-subactor-as-service-daemon tree supervisor.
+
+    The delivered `ServiceMngr` is a singleton instance for each
+    actor-process and is allocated on first open and never
+    de-allocated unless explicitly deleted by al call to
+    `del_service_mngr()`.
+
+    '''
+    # TODO: factor this an allocation into
+    # a `._mngr.open_service_mngr()` and put in the
+    # once-n-only-once setup/`.__aenter__()` part!
+    # -[ ] how to make this only happen on the `mngr == None` case?
+    #  |_ use `.trionics.maybe_open_context()` (for generic
+    #     async-with-style-only-once of the factory impl, though
+    #     what do we do for the allocation case?
+    #    / `.maybe_open_nursery()` (since for this specific case
+    #    it's simpler?) to activate
+    async with (
+        tractor.open_nursery() as an,
+        trio.open_nursery() as tn,
+    ):
+        # impl specific obvi..
+        init_kwargs.update({
+            'actor_n': an,
+            'service_n': tn,
+        })
+
+        mngr: ServiceMngr|None
+        if (mngr := _singleton[0]) is None:
+
+            log.info('Allocating a new service mngr!')
+            mngr = _singleton[0] = ServiceMngr(**init_kwargs)
+
+            # TODO: put into `.__aenter__()` section of
+            # eventual `@singleton_acm` API wrapper.
+            #
+            # assign globally for future daemon/task creation
+            mngr.actor_n = an
+            mngr.service_n = tn
+
+        else:
+            assert (
+                mngr.actor_n
+                and
+                mngr.service_tn
+            )
+            log.info(
+                'Using extant service mngr!\n\n'
+                f'{mngr!r}\n'  # it has a nice `.__repr__()` of services state
+            )
+
+        try:
+            # NOTE: this is a singleton factory impl specific detail
+            # which should be supported in the condensed
+            # `@singleton_acm` API?
+            mngr.debug_mode = debug_mode
+
+            yield mngr
+        finally:
+            # TODO: is this more clever/efficient?
+            # if 'samplerd' in mngr.service_tasks:
+            #     await mngr.cancel_service('samplerd')
+            tn.cancel_scope.cancel()
+
+
+
+def get_service_mngr() -> ServiceMngr:
+    '''
+    Try to get the singleton service-mngr for this actor presuming it
+    has already been allocated using,
+
+    .. code:: python
+
+        async with open_<@singleton_acm(func)>() as mngr`
+            ... this block kept open ...
+
+    If not yet allocated raise a `ServiceError`.
+
+    '''
+    # https://stackoverflow.com/a/12627202
+    # https://docs.python.org/3/library/inspect.html#inspect.Signature
+    maybe_mngr: ServiceMngr|None = inspect.signature(
+        open_service_mngr
+    ).parameters['_singleton'].default[0]
+
+    if maybe_mngr is None:
+        raise RuntimeError(
+            'Someone must allocate a `ServiceMngr` using\n\n'
+            '`async with open_service_mngr()` beforehand!!\n'
+        )
+
+    return maybe_mngr
+
+
 # TODO: we need remote wrapping and a general soln:
 # - factor this into a ``tractor.highlevel`` extension # pack for the
 #   library.
@@ -46,31 +183,46 @@ from ._util import (
 #   to the pikerd actor for starting services remotely!
 # - prolly rename this to ActorServicesNursery since it spawns
 #   new actors and supervises them to completion?
-class Services:
+@dataclass
+class ServiceMngr:
+# class ServiceMngr(msgspec.Struct):
+    '''
+    A multi-subactor-as-service manager.
 
-    actor_n: tractor._supervise.ActorNursery
+    Spawn, supervise and monitor service/daemon subactors in a SC
+    process tree.
+
+    '''
+    actor_n: ActorNursery
     service_n: trio.Nursery
-    debug_mode: bool  # tractor sub-actor debug mode flag
+    debug_mode: bool = False # tractor sub-actor debug mode flag
+
     service_tasks: dict[
         str,
         tuple[
             trio.CancelScope,
+            Context,
             Portal,
             trio.Event,
         ]
-    ] = {}
-    locks = defaultdict(trio.Lock)
+    ] = field(default_factory=dict)
+
+    # internal per-service task mutexs
+    _locks = defaultdict(trio.Lock)
 
-    @classmethod
     async def start_service_task(
         self,
         name: str,
         portal: Portal,
+
+        # TODO: typevar for the return type of the target and then
+        # use it below for `ctx_res`?
         target: Callable,
+
         allow_overruns: bool = False,
         **ctx_kwargs,
 
-    ) -> (trio.CancelScope, Context):
+    ) -> (trio.CancelScope, Context, Any):
         '''
         Open a context in a service sub-actor, add to a stack
         that gets unwound at ``pikerd`` teardown.
@@ -83,6 +235,7 @@ class Services:
             task_status: TaskStatus[
                 tuple[
                     trio.CancelScope,
+                    Context,
                     trio.Event,
                     Any,
                 ]
@@ -90,64 +243,87 @@ class Services:
 
         ) -> Any:
 
+            # TODO: use the ctx._scope directly here instead?
+            # -[ ] actually what semantics do we expect for this
+            #   usage!?
             with trio.CancelScope() as cs:
+                try:
+                    async with portal.open_context(
+                        target,
+                        allow_overruns=allow_overruns,
+                        **ctx_kwargs,
 
-                async with portal.open_context(
-                    target,
-                    allow_overruns=allow_overruns,
-                    **ctx_kwargs,
+                    ) as (ctx, started):
 
-                ) as (ctx, first):
-
-                    # unblock once the remote context has started
-                    complete = trio.Event()
-                    task_status.started((cs, complete, first))
-                    log.info(
-                        f'`pikerd` service {name} started with value {first}'
-                    )
-                    try:
+                        # unblock once the remote context has started
+                        complete = trio.Event()
+                        task_status.started((
+                            cs,
+                            ctx,
+                            complete,
+                            started,
+                        ))
+                        log.info(
+                            f'`pikerd` service {name} started with value {started}'
+                        )
                         # wait on any context's return value
                         # and any final portal result from the
                         # sub-actor.
-                        ctx_res: Any = await ctx.result()
+                        ctx_res: Any = await ctx.wait_for_result()
 
                         # NOTE: blocks indefinitely until cancelled
                         # either by error from the target context
                         # function or by being cancelled here by the
                         # surrounding cancel scope.
-                        return (await portal.result(), ctx_res)
-                    except ContextCancelled as ctxe:
-                        canceller: tuple[str, str] = ctxe.canceller
-                        our_uid: tuple[str, str] = current_actor().uid
-                        if (
-                            canceller != portal.channel.uid
-                            and
-                            canceller != our_uid
-                        ):
-                            log.cancel(
-                                f'Actor-service {name} was remotely cancelled?\n'
-                                f'remote canceller: {canceller}\n'
-                                f'Keeping {our_uid} alive, ignoring sub-actor cancel..\n'
-                            )
-                        else:
-                            raise
+                        return (
+                            await portal.wait_for_result(),
+                            ctx_res,
+                        )
 
+                except ContextCancelled as ctxe:
+                    canceller: tuple[str, str] = ctxe.canceller
+                    our_uid: tuple[str, str] = current_actor().uid
+                    if (
+                        canceller != portal.chan.uid
+                        and
+                        canceller != our_uid
+                    ):
+                        log.cancel(
+                            f'Actor-service `{name}` was remotely cancelled by a peer?\n'
 
+                            # TODO: this would be a good spot to use
+                            # a respawn feature Bo
+                            f'-> Keeping `pikerd` service manager alive despite this inter-peer cancel\n\n'
 
-                    finally:
-                        await portal.cancel_actor()
-                        complete.set()
-                        self.service_tasks.pop(name)
+                            f'cancellee: {portal.chan.uid}\n'
+                            f'canceller: {canceller}\n'
+                        )
+                    else:
+                        raise
 
-        cs, complete, first = await self.service_n.start(open_context_in_task)
+                finally:
+                    # NOTE: the ctx MUST be cancelled first if we
+                    # don't want the above `ctx.wait_for_result()` to
+                    # raise a self-ctxc. WHY, well since from the ctx's
+                    # perspective the cancel request will have
+                    # arrived out-out-of-band at the `Actor.cancel()`
+                    # level, thus `Context.cancel_called == False`,
+                    # meaning `ctx._is_self_cancelled() == False`.
+                    # with trio.CancelScope(shield=True):
+                    # await ctx.cancel()
+                    await portal.cancel_actor()
+                    complete.set()
+                    self.service_tasks.pop(name)
+
+        cs, sub_ctx, complete, started = await self.service_n.start(
+            open_context_in_task
+        )
 
         # store the cancel scope and portal for later cancellation or
         # retstart if needed.
-        self.service_tasks[name] = (cs, portal, complete)
+        self.service_tasks[name] = (cs, sub_ctx, portal, complete)
+        return cs, sub_ctx, started
 
-        return cs, first
-
-    @classmethod
     async def cancel_service(
         self,
         name: str,
@@ -158,8 +334,80 @@ class Services:
 
         '''
         log.info(f'Cancelling `pikerd` service {name}')
-        cs, portal, complete = self.service_tasks[name]
-        cs.cancel()
+        cs, sub_ctx, portal, complete = self.service_tasks[name]
+
+        # cs.cancel()
+        await sub_ctx.cancel()
         await complete.wait()
-        assert name not in self.service_tasks, \
-            f'Serice task for {name} not terminated?'
+
+        if name in self.service_tasks:
+            # TODO: custom err?
+            # raise ServiceError(
+            raise RuntimeError(
+                f'Serice task for {name} not terminated?'
+            )
+
+        # assert name not in self.service_tasks, \
+        #     f'Serice task for {name} not terminated?'
+
+    async def start_service(
+        self,
+        daemon_name: str,
+        ctx_ep: Callable,  # kwargs must `partial`-ed in!
+
+        debug_mode: bool = False,
+        **tractor_actor_kwargs,
+
+    ) -> Context:
+        '''
+        Start a "service" task in a new sub-actor (daemon) and manage it's lifetime
+        indefinitely.
+
+        Services can be cancelled/shutdown using `.cancel_service()`.
+
+        '''
+        entry: tuple|None = self.service_tasks.get(daemon_name)
+        if entry:
+            (cs, sub_ctx, portal, complete) = entry
+            return sub_ctx
+
+        if daemon_name not in self.service_tasks:
+            portal = await self.actor_n.start_actor(
+                daemon_name,
+                debug_mode=(  # maybe set globally during allocate
+                    debug_mode
+                    or
+                    self.debug_mode
+                ),
+                **tractor_actor_kwargs,
+            )
+            ctx_kwargs: dict[str, Any] = {}
+            if isinstance(ctx_ep, functools.partial):
+                ctx_kwargs: dict[str, Any] = ctx_ep.keywords
+                ctx_ep: Callable = ctx_ep.func
+
+            (cs, sub_ctx, started) = await self.start_service_task(
+                daemon_name,
+                portal,
+                ctx_ep,
+                **ctx_kwargs,
+            )
+
+            return sub_ctx
+
+
+# TODO:
+# -[ ] factor all the common shit from `.data._sampling`
+#   and `.brokers._daemon` into here / `ServiceMngr`
+#   in terms of allocating the `Portal` as part of the
+#   "service-in-subactor" starting!
+# -[ ] move to `tractor.hilevel._service`, import and use here!
+# NOTE: purposely leaks the ref to the mod-scope Bo
+# import tractor
+# from tractor.hilevel import (
+#     open_service_mngr,
+#     ServiceMngr,
+# )
+# mngr: ServiceMngr|None = None
+# with tractor.hilevel.open_service_mngr() as mngr:
+#     Services = proxy(mngr)

piker/service/elastic.py

@@ -21,11 +21,13 @@ from typing import (
     TYPE_CHECKING,
 )
 
+# TODO: oof, needs to be changed to `httpx`!
 import asks
 
 if TYPE_CHECKING:
     import docker
     from ._ahab import DockerContainer
+    from . import ServiceMngr
 
 from ._util import log  # sub-sys logger
 from ._util import (
@@ -127,7 +129,7 @@ def start_elasticsearch(
 
 @acm
 async def start_ahab_daemon(
-    service_mngr: Services,
+    service_mngr: ServiceMngr,
     user_config: dict | None = None,
     loglevel: str | None = None,
 

piker/service/marketstore.py

@@ -53,7 +53,7 @@ import pendulum
 # import purerpc
 
 from ..data.feed import maybe_open_feed
-from . import Services
+from . import ServiceMngr
 from ._util import (
     log,  # sub-sys logger
     get_console_log,
@@ -233,7 +233,7 @@ def start_marketstore(
 
 @acm
 async def start_ahab_daemon(
-    service_mngr: Services,
+    service_mngr: ServiceMngr,
     user_config: dict | None = None,
     loglevel: str | None = None,
 

piker/tsp/__init__.py

@@ -458,13 +458,15 @@ async def start_backfill(
                     'bf_until <- last_start_dt:\n'
                     f'{backfill_until_dt} <- {last_start_dt}\n'
                 )
-
-                # ugh, what's a better way?
-                # TODO: fwiw, we probably want a way to signal a throttle
-                # condition (eg. with ib) so that we can halt the
-                # request loop until the condition is resolved?
-                if timeframe > 1:
-                    await tractor.pause()
+                # UGH: what's a better way?
+                # TODO: backends are responsible for being correct on
+                # this right!?
+                # -[ ] in the `ib` case we could maybe offer some way
+                #     to halt the request loop until the condition is
+                #     resolved or should the backend be entirely in
+                #     charge of solving such faults? yes, right?
+                # if timeframe > 1:
+                #     await tractor.pause()
                 return
 
             assert (
@@ -578,6 +580,7 @@ async def start_backfill(
                     'crypto',
                     'crypto_currency',
                     'fiat',  # a "forex pair"
+                    'perpetual_future',  # stupid "perps" from cex land
                 }:
                     # for now, our table key schema is not including
                     # the dst[/src] source asset token.

pyproject.toml

@@ -15,8 +15,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 [build-system]
-requires = ["poetry-core"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 # ------ - ------
 
@@ -34,121 +34,114 @@ ignore = []
 
 # ------ - ------
 
-[tool.poetry]
-name = "piker"
-version = "0.1.0.alpha0.dev0"
-description = "trading gear for hackers"
-authors = ["Tyler Goodlet <goodboy_foss@protonmail.com>"]
-license = "AGPLv3"
-readme = "README.rst"
-
-# ------ - ------
-
-[tool.poetry.dependencies]
-async-generator = "^1.10"
-attrs = "^23.1.0"
-bidict = "^0.22.1"
-colorama = "^0.4.6"
-colorlog = "^6.7.0"
-cython = "^3.0.0"
-greenback = "^1.1.1"
-ib-insync = "^0.9.86"
-msgspec = "^0.18.0"
-numba = "^0.59.0"
-numpy = "^1.25"
-polars = "^0.18.13"
-pygments = "^2.16.1"
-python = ">=3.11, <3.13"
-rich = "^13.5.2"
-# setuptools = "^68.0.0"
-tomli = "^2.0.1"
-tomli-w = "^1.0.0"
-trio-util = "^0.7.0"
-trio-websocket = "^0.10.3"
-typer = "^0.9.0"
-rapidfuzz = "^3.5.2"
-pdbp = "^1.5.0"
-trio = "^0.24"
-pendulum = "^3.0.0"
-httpx = "^0.27.0"
-
-[tool.poetry.dependencies.tractor]
-develop = true
-git = 'https://github.com/goodboy/tractor.git'
-branch = 'asyncio_debugger_support'
-# path = "../tractor"
-
-[tool.poetry.dependencies.asyncvnc]
-git = 'https://github.com/pikers/asyncvnc.git'
-branch = 'main'
-
-[tool.poetry.dependencies.tomlkit]
-develop = true
-git = 'https://github.com/pikers/tomlkit.git'
-branch = 'piker_pin'
-# path = "../tomlkit/"
-
-[tool.poetry.group.uis]
-optional = true
-[tool.poetry.group.uis.dependencies]
-# https://python-poetry.org/docs/managing-dependencies/#dependency-groups
-# TODO: make sure the levenshtein shit compiles on nix..
-# rapidfuzz = {extras = ["speedup"], version = "^0.18.0"}
-rapidfuzz = "^3.2.0"
-qdarkstyle = ">=3.0.2"
-pyqtgraph = { git = 'https://github.com/pikers/pyqtgraph.git' }
-
-# ------ - ------
-pyqt6 = "^6.7.0"
-
-[tool.poetry.group.dev]
-optional = true
-[tool.poetry.group.dev.dependencies]
-# testing / CI
-pytest = "^6.0.0"
-elasticsearch = "^8.9.0"
-xonsh = "^0.14.2"
-prompt-toolkit = "3.0.40"
-
-# console ehancements and eventually remote debugging
-# extras/helpers.
-# TODO: add a toolset that makes debugging a `pikerd` service
-# (tree) easy to hack on directly using more or less the local env:
-# - xonsh + xxh
-# - rsyscall + pdbp
-# - actor runtime control console like BEAM/OTP
-
-# ------ - ------
-
-# TODO: add an `--only daemon` group for running non-ui / pikerd
-# service tree in distributed mode B)
-# https://python-poetry.org/docs/managing-dependencies/#installing-group-dependencies
-# [tool.poetry.group.daemon.dependencies]
-
-[tool.poetry.scripts]
-piker = 'piker.cli:cli'
-pikerd = 'piker.cli:pikerd'
-ledger = 'piker.accounting.cli:ledger'
-
-
 [project]
-keywords=[
-  "async",
-  "trading",
-  "finance",
-  "quant",
-  "charting",
+name = "piker"
+version = "0.1.0a0dev0"
+description = "trading gear for hackers"
+authors = [{ name = "Tyler Goodlet", email = "goodboy_foss@protonmail.com" }]
+requires-python = ">=3.12, <3.13"
+license = "AGPL-3.0-or-later"
+readme = "README.rst"
+keywords = [
+    "async",
+    "trading",
+    "finance",
+    "quant",
+    "charting",
 ]
-classifiers=[
-  'Development Status :: 3 - Alpha',
-  "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
-  'Operating System :: POSIX :: Linux',
-  "Programming Language :: Python :: Implementation :: CPython",
-  "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.11",
-  "Programming Language :: Python :: 3.12",
-  'Intended Audience :: Financial and Insurance Industry',
-  'Intended Audience :: Science/Research',
-  'Intended Audience :: Developers',
-  'Intended Audience :: Education',
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Intended Audience :: Financial and Insurance Industry",
+    "Intended Audience :: Science/Research",
+    "Intended Audience :: Developers",
+    "Intended Audience :: Education",
 ]
+dependencies = [
+    "async-generator >=1.10, <2.0.0",
+    "attrs >=23.1.0, <24.0.0",
+    "bidict >=0.22.1, <0.23.0",
+    "colorama >=0.4.6, <0.5.0",
+    "colorlog >=6.7.0, <7.0.0",
+    "ib-insync >=0.9.86, <0.10.0",
+    "numba >=0.59.0, <0.60.0",
+    "numpy >=1.25, <2.0",
+    "polars >=0.18.13, <0.19.0",
+    "pygments >=2.16.1, <3.0.0",
+    "rich >=13.5.2, <14.0.0",
+    "tomli >=2.0.1, <3.0.0",
+    "tomli-w >=1.0.0, <2.0.0",
+    "trio-util >=0.7.0, <0.8.0",
+    "trio-websocket >=0.10.3, <0.11.0",
+    "typer >=0.9.0, <1.0.0",
+    "rapidfuzz >=3.5.2, <4.0.0",
+    "pdbp >=1.5.0, <2.0.0",
+    "trio >=0.24, <0.25",
+    "pendulum >=3.0.0, <4.0.0",
+    "httpx >=0.27.0, <0.28.0",
+    "cryptofeed >=2.4.0, <3.0.0",
+    "pyarrow >=17.0.0, <18.0.0",
+    "websockets ==12.0",
+    "msgspec",
+    "tractor",
+    "asyncvnc",
+    "tomlkit",
+]
+
+[project.optional-dependencies]
+uis = [
+    # https://docs.astral.sh/uv/concepts/projects/dependencies/#optional-dependencies
+    # TODO: make sure the levenshtein shit compiles on nix..
+    # rapidfuzz = {extras = ["speedup"], version = "^0.18.0"}
+    "rapidfuzz >=3.2.0, <4.0.0",
+    "qdarkstyle >=3.0.2, <4.0.0",
+    "pyqt6 >=6.7.0, <7.0.0",
+    "pyqtgraph",
+
+    # ------ - ------
+
+    # TODO: add an `--only daemon` group for running non-ui / pikerd
+    # service tree in distributed mode B)
+    # https://docs.astral.sh/uv/concepts/projects/dependencies/#optional-dependencies
+    # [project.optional-dependencies]
+]
+
+[dependency-groups]
+dev = [
+    "pytest >=6.0.0, <7.0.0",
+    "elasticsearch >=8.9.0, <9.0.0",
+    "xonsh >=0.14.2, <0.15.0",
+    "prompt-toolkit ==3.0.40",
+    "cython >=3.0.0, <4.0.0",
+    "greenback >=1.1.1, <2.0.0",
+    # console ehancements and eventually remote debugging
+    # extras/helpers.
+    # TODO: add a toolset that makes debugging a `pikerd` service
+    # (tree) easy to hack on directly using more or less the local env:
+    # - xonsh + xxh
+    # - rsyscall + pdbp
+    # - actor runtime control console like BEAM/OTP
+]
+
+[project.scripts]
+piker = "piker.cli:cli"
+pikerd = "piker.cli:pikerd"
+ledger = "piker.accounting.cli:ledger"
+
+[tool.hatch.build.targets.sdist]
+include = ["piker"]
+
+[tool.hatch.build.targets.wheel]
+include = ["piker"]
+
+[tool.uv.sources]
+pyqtgraph = { git = "https://github.com/pikers/pyqtgraph.git" }
+asyncvnc = { git = "https://github.com/pikers/asyncvnc.git", branch = "main" }
+tomlkit = { git = "https://github.com/pikers/tomlkit.git", branch ="piker_pin" }
+msgspec = { git = "https://github.com/jcrist/msgspec.git" }
+tractor = { path = "../tractor" }

tests/conftest.py

@@ -10,7 +10,7 @@ from piker import (
     config,
 )
 from piker.service import (
-    Services,
+    get_service_mngr,
 )
 from piker.log import get_console_log
 
@@ -129,7 +129,7 @@ async def _open_test_pikerd(
         ) as service_manager,
     ):
         # this proc/actor is the pikerd
-        assert service_manager is Services
+        assert service_manager is get_service_mngr()
 
         async with tractor.wait_for_actor(
             'pikerd',

tests/test_ems.py

@@ -26,7 +26,7 @@ import pytest
 import tractor
 from uuid import uuid4
 
-from piker.service import Services
+from piker.service import ServiceMngr
 from piker.log import get_logger
 from piker.clearing._messages import (
     Order,
@@ -158,7 +158,7 @@ def load_and_check_pos(
 
 
 def test_ems_err_on_bad_broker(
-    open_test_pikerd: Services,
+    open_test_pikerd: ServiceMngr,
     loglevel: str,
 ):
     async def load_bad_fqme():

tests/test_services.py

@@ -15,7 +15,7 @@ import tractor
 
 from piker.service import (
     find_service,
-    Services,
+    ServiceMngr,
 )
 from piker.data import (
     open_feed,
@@ -44,7 +44,7 @@ def test_runtime_boot(
     async def main():
         port = 6666
         daemon_addr = ('127.0.0.1', port)
-        services: Services
+        services: ServiceMngr
 
         async with (
             open_test_pikerd(