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feat(client): typo-safe protocol enums + context manager; add wafer_tool example

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Interface cleanup so the report_* family matches the typo-safe ethos of
eq.names instead of leaking raw protobuf errors on a misspelled value.

- Milestone / ModuleState / JobState: importable str-enums (member == its
  wire name, so plain strings still work) — autocomplete + a typo-checked
  happy path. The clean rule: equipment-specific *names* live on eq.names;
  fixed protocol *value-sets* are enums.
- _enum_value(): resolves an enum-or-string arg client-side and, on a bad
  value, raises ValueError with a close-match hint *before* the wire. Wired
  into report_job / report_substrate / report_module / request_control_state
  (all previously raised a raw protobuf ValueError).
- Equipment is now a context manager (with Equipment(...) as eq: ...).
- examples/wafer_tool.py: a cluster tool tracking one wafer through one
  module end-to-end (E90 + E157), showing the enums + context manager.
- tests/test_enums.py: asserts the enums stay in lockstep with the proto and
  that the typo path is helpful. Wired into run_interop.sh (pyclient step).
- Interop drives both the enum and string forms on the wire + the ValueError
  typo path. Docs (ch16/ch42) updated; names-vs-enums rule documented.

All Python unit tests + 25 pyclient interop checks pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Raphael Maenle
2026-06-26 22:09:48 +02:00
parent 2218b854ce
commit 8a55137e57
12 changed files with 290 additions and 82 deletions
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docs/42_vendor_daemon_and_clients.md
+57 -35
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@@ -100,52 +100,57 @@ protocol was designed for it.
extension) and the entire integration is:
```python
from secsgem_client import Equipment
from secsgem_client import Equipment, Milestone, ModuleState
eq = Equipment("localhost:50051")
with Equipment("localhost:50051") as eq: # context manager closes the channel
eq.set(ChamberPressure=2.5) # host sees it on its next S1F3
eq["WaferCounter"] = 7 # item syntax, same thing
print(eq.get("ChamberPressure")) # read back through the daemon
eq.set(ChamberPressure=2.5) # host sees it on its next S1F3
eq["WaferCounter"] = 7 # item syntax, same thing
print(eq.get("ChamberPressure")) # read back through the daemon
# eq.names — autocomplete-able, typo-safe name lookup (fetched from Describe)
eq.fire(eq.names.event.ProcessStarted) # typo → AttributeError at the line it happened
eq.alarm(eq.names.alarm.chiller_temp_high)
eq.clear(eq.names.alarm.chiller_temp_high)
# Plain strings still work; names are a convenience, not a requirement.
eq.fire("ProcessStarted", ChamberPressure=2.75)
# eq.names — autocomplete-able, typo-safe name lookup (fetched from Describe)
eq.fire(eq.names.event.ProcessStarted) # typo → AttributeError at the line it happened
eq.alarm(eq.names.alarm.chiller_temp_high)
eq.clear(eq.names.alarm.chiller_temp_high)
# Plain strings still work; names are a convenience, not a requirement.
eq.fire("ProcessStarted", ChamberPressure=2.75)
@eq.command # function name IS the command name;
def START(cmd): # validated against Describe at decoration time
run_recipe(cmd.params.get("PPID"))
eq.fire(eq.names.event.ProcessStarted)
@eq.command # function name IS the command name;
def START(cmd): # validated against Describe at decoration time
run_recipe(cmd.params.get("PPID"))
eq.fire(eq.names.event.ProcessStarted)
# @eq.on("NAME") still works — use it when the name can't be a Python identifier
# or when you prefer explicit strings.
# @eq.on("NAME") still works — use it when the name can't be a Python identifier
# or when you prefer explicit strings.
eq.listen(background=True) # consume the Subscribe stream
eq.listen(background=True) # consume the Subscribe stream
eq.control_state # "ONLINE_REMOTE"
eq.request_control_state("HOST_OFFLINE") # operator panel -> maintenance
eq.health() # link / control state / spool depth
eq.control_state # "ONLINE_REMOTE"
eq.request_control_state("HOST_OFFLINE") # operator panel -> maintenance
eq.health() # link / control state / spool depth
# E90 / E157 material tracking
eq.report_substrate("WFR-001", "ARRIVED", carrier_id="FOUP-7", slot=3)
eq.report_substrate("WFR-001", "AT_WORK")
eq.report_substrate("WFR-001", "PROCESSING")
eq.report_substrate("WFR-001", "PROCESSED")
eq.report_substrate("WFR-001", "AT_DESTINATION")
# E90 / E157 material tracking. Milestone / ModuleState are importable
# enums (autocomplete + typo-checked); the equivalent plain strings work too.
eq.report_substrate("WFR-001", Milestone.ARRIVED, carrier_id="FOUP-7", slot=3)
eq.report_substrate("WFR-001", Milestone.AT_WORK)
eq.report_substrate("WFR-001", Milestone.PROCESSING)
eq.report_substrate("WFR-001", Milestone.PROCESSED)
eq.report_substrate("WFR-001", Milestone.AT_DESTINATION)
eq.report_module("CHAMBER-A", "GENERAL_EXECUTING")
eq.report_module("CHAMBER-A", "STEP_EXECUTING")
eq.report_module("CHAMBER-A", "STEP_COMPLETED")
eq.report_module("CHAMBER-A", "NOT_EXECUTING")
eq.report_module("CHAMBER-A", ModuleState.GENERAL_EXECUTING)
eq.report_module("CHAMBER-A", ModuleState.STEP_EXECUTING)
eq.report_module("CHAMBER-A", ModuleState.STEP_COMPLETED)
eq.report_module("CHAMBER-A", ModuleState.NOT_EXECUTING)
```
Anything the daemon declines raises `SecsGemError` with its explanation
(`no variable named 'ChamberPresure'`). A complete runnable tool is
[clients/python/examples/mini_tool.py](../clients/python/examples/mini_tool.py)
(~25 lines). The package is validated end-to-end by
Two error channels, by design: a **bad value you control** (a misspelled
milestone, an unknown control state) raises a plain `ValueError`/`NameError`
*before* any round-trip, with a close-match hint; anything the **daemon**
declines (unknown variable name, illegal FSM transition) raises `SecsGemError`
with its explanation (`no variable named 'ChamberPresure'`). Runnable tools:
[mini_tool.py](../clients/python/examples/mini_tool.py) (~25-line quickstart)
and [wafer_tool.py](../clients/python/examples/wafer_tool.py) (E90/E157
material tracking). The package is validated end-to-end by
`interop/pyclient_interop.py` driving the published API while secsgem-py
judges the wire.
@@ -171,6 +176,23 @@ eq.names.constant.MaxPressure # → "MaxPressure"
`dir(eq.names.event)` lists all event names — REPL and IDE autocomplete
work out of the box.
### Names vs. enums — one rule
There are two kinds of identifier in the API, split on whether *your tool* or
*the SEMI standard* owns the value:
- **Equipment-specific names** — events, alarms, commands, variables,
constants — come from *your* `equipment.yaml`, so they live on the instance
as `eq.names.*` (fetched from the live daemon).
- **Fixed protocol value-sets** — `Milestone`, `ModuleState`, `JobState` —
are defined by the standards, so they're importable enums
(`from secsgem_client import Milestone`). `Milestone.ARRIVED == "ARRIVED"`,
so an enum member and its plain string are interchangeable; the enum just
buys you autocomplete and a typo-checked happy path.
Either way a wrong value fails fast and helpfully — a `ValueError`/`NameError`
with a close-match suggestion, raised client-side before the wire.
Other languages: generate stubs from the proto (`protoc` supports 11+
languages) and wrap them the same way — the Python client is ~200 lines
and is the reference for what a thin wrapper should feel like.