Support using client in repl running tasks without rabbit
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
调研方向
Start with src/blueapi/client/plan_cache.py, client.py, and event_bus.py, which appear in the traceback; trace how foreground task execution connects to the message bus. Compare the websocket option with the alternative acceptance criteria for background execution and clearer connection errors. Done means foreground tasks work through the chosen approach, or bus connection failures produce a helpful user facing error.
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描述
If you try and use the client in a repl without stomp configured it errors with a stack trace showing it can't connect to the message bus. This is an unhelpful wall of text to be user facing.
>>> bc.plans.count(detectors=[bc.devices.det])
# 2026-10-20 10:00:18,596 INFO blueapi.client.plan_cache plan_cache.py:112 -- Building args for [detectors,num,delay,metadata], using () and {'detectors': [Device(det)]}
# 2026-10-20 10:00:18,605 INFO root messaging.py:366 -- Stomp client connecting...
# 2026-10-20 10:00:18,605 WARNING stomp.py transport.py:893 -- could not connect to host localhost, port 61613: [Errno 111] Connection refused
# 2026-10-20 10:00:18,807 WARNING stomp.py transport.py:893 -- could not connect to host localhost, port 61613: [Errno 111] Connection refused
# 2026-10-20 10:00:19,009 WARNING stomp.py transport.py:893 -- could not connect to host localhost, port 61613: [Errno 111] Connection refused
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/abi/projects/blueapi/src/blueapi/client/plan_cache.py", line 82, in __call__
match self._client.run_task(req):
~~~~~~~~~~~~~~~~~~~~~^^^^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/observability_utils/tracing/decorators.py", line 151, in wrapper
return func(*args, **kwargs)
File "/home/abi/projects/blueapi/src/blueapi/client/client.py", line 400, in run_task
with self._events:
^^^^^^^^^^^^
File "/home/abi/projects/blueapi/src/blueapi/client/event_bus.py", line 27, in __enter__
self.app.connect()
~~~~~~~~~~~~~~~~^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/bluesky_stomp/messaging.py", line 368, in connect
self._connect_to_broker()
~~~~~~~~~~~~~~~~~~~~~~~^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/bluesky_stomp/messaging.py", line 383, in _connect_to_broker
self._conn.connect(wait=True) # type: ignore
~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/stomp/connect.py", line 151, in connect
self.transport.start()
~~~~~~~~~~~~~~~~~~~~^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/stomp/transport.py", line 113, in start
self.attempt_connection()
~~~~~~~~~~~~~~~~~~~~~~~^^
File "/home/abi/projects/blueapi/.venv/lib/python3.14/site-packages/stomp/transport.py", line 910, in attempt_connection
raise exception.ConnectFailedException()
stomp.exception.ConnectFailedException
>>>
Acceptance Criteria
- Preferably:
-- The fg running option is changed to a websocket by default, removing the message bus from this loop
-- If there are connection errors these are nicely wrapped for the user - Alternatively if if bus really wants to be kept for this:
-- The client supports a background running option, like the --bg flag on the cli
-- If you do try and run a plan in the fg without the bus you get a more helpful error
- 主要语言
- Python
- 星标
- 13
- 派生
- 14
- 平均合并
- 4 天 14 小时
- 30 天内合并 PR
- 14
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