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Cookwala / SDK e cenários / 038

Cold chain in the kitchen: chilling and marinating traces

Chilling and marinating happen at 0 to 5 degC. A fridge that never gets there, or a marinade that warms to 7 degC, fails the check; a fridge thermometer is the first rung for both.

Público: dietitian · Objetivo: Torne as pessoas mais saudáveis · Nível: beginner

Leia primeiro: /docs/CORE/ /docs/QUICKSTART/

Passos

  1. A salad cooling from 20 to 8, 4 and 3 degC: the band is reached and held. checkEnvelope

  2. A fridge that stays at 7 degC: never reached the band. checkEnvelope

  3. A marinade at 4 degC that warms to 7 degC after two hours: left the envelope. checkEnvelope

  4. Both operations share the 0 to 5 degC band; marinating names the time-temperature hazard. getOps

  5. A fridge thermometer is the first rung for chilling. ladder

  6. The fridge rung.

Resultado

You can check cold steps with the same tool as hot ones and advise which sensor a kitchen needs for them. The same bands return in the humanitarian profile's cold-chain checks.

Linha de comando

printf '[{"t": 0, "tempC": 20}, {"t": 30, "tempC": 8}, {"t": 60, "tempC": 4}, {"t": 90, "tempC": 3}]' > trace.json && cookwala envelope cw.op.chill trace.json
printf '[{"t": 0, "tempC": 4}, {"t": 30, "tempC": 4}, {"t": 60, "tempC": 7}]' > trace.json && cookwala envelope cw.op.marinate trace.json
curl -s http://localhost:7878/v1/tools/vocab/ops

Saída gravada

Status: ok

[1] checkEnvelope: {"envelopeOk": true, "targetOk": null, "reason": "ok"}
[2] checkEnvelope: {"envelopeOk": false, "targetOk": null, "reason": "never_reached_envelope"}
[3] checkEnvelope: {"envelopeOk": false, "targetOk": null, "reason": "left_envelope"}
[4] getOps: {"name": "ops", "version": "0.2.0", "entries": [{"id": "cw.op.dispense", "label": {"en": "Dispense / measure", "ar": "قياس وإضافة"}, "definition": "Measure an ingredient by mass, volume or count and add it to a target.", "classes": ["cw.opfamily.handle"], "paramsSchema": {"type": "object", "properties": {"precision": {"type": "number"}}}, "sensors": ["cw.sense.mass"], "links": {"ieee1872": "IEEE 1872.1-2024 Task (to be mapped)"}}, {"id": "cw.op.transfer", "label": {"en": "Transfer", "ar": "نقل"}, "definition": "Move food or a vessel's contents from one place to another.", "classes": ["cw.opfam…
[5] ladder: "cw.sense.fridge_temp"

Código

Executar: python scenarios/out/038-cold-chain-in-the-kitchen/python.py

# Scenario 038: Cold chain in the kitchen: chilling and marinating traces
# Chilling and marinating happen at 0 to 5 degC. A fridge that never gets there, or a marinade that warms to 7 degC, fails the check; a fridge thermometer is the first rung for both.
# Run a hub first: python hub/cookwala_hub.py --recipes examples
import json, os
from cookwala.client import CookwalaClient, CookwalaProblem

def load(path):
    with open(path, encoding="utf-8") as f:
        return json.load(f)

def pick(obj, path):
    for part in path.replace("]", "").replace("[", ".").split("."):
        obj = obj[int(part)] if part.isdigit() else (len(obj) if part == "length" else obj.get(part))
    return obj

c = CookwalaClient(os.environ.get("COOKWALA_HUB", "http://localhost:7878"))


# Step 1: A salad cooling from 20 to 8, 4 and 3 degC: the band is reached and held.
ok = c.check_envelope("cw.op.chill", [{"t": 0, "tempC": 20}, {"t": 600, "tempC": 8}, {"t": 1200, "tempC": 4}, {"t": 1800, "tempC": 3}])
assert pick(ok, "envelopeOk") == True, pick(ok, "envelopeOk")
print("ok", "envelopeOk", "=", True)
assert pick(ok, "reason") == "ok", pick(ok, "reason")
print("ok", "reason", "=", "ok")

# Step 2: A fridge that stays at 7 degC: never reached the band.
warmFridge = c.check_envelope("cw.op.chill", [{"t": 0, "tempC": 20}, {"t": 600, "tempC": 8}, {"t": 1200, "tempC": 7}])
assert pick(warmFridge, "envelopeOk") == False, pick(warmFridge, "envelopeOk")
print("ok", "envelopeOk", "=", False)
assert pick(warmFridge, "reason") == "never_reached_envelope", pick(warmFridge, "reason")
print("ok", "reason", "=", "never_reached_envelope")

# Step 3: A marinade at 4 degC that warms to 7 degC after two hours: left the envelope.
marinade = c.check_envelope("cw.op.marinate", [{"t": 0, "tempC": 4}, {"t": 3600, "tempC": 4}, {"t": 7200, "tempC": 7}])
assert pick(marinade, "envelopeOk") == False, pick(marinade, "envelopeOk")
print("ok", "envelopeOk", "=", False)
assert pick(marinade, "reason") == "left_envelope", pick(marinade, "reason")
print("ok", "reason", "=", "left_envelope")

# Step 4: Both operations share the 0 to 5 degC band; marinating names the time-temperature hazard.
ops = c.get_ops()
assert pick(ops, "entries[47].id") == "cw.op.chill", pick(ops, "entries[47].id")
print("ok", "entries[47].id", "=", "cw.op.chill")
assert pick(ops, "entries[47].envelope.tempC.max") == 5, pick(ops, "entries[47].envelope.tempC.max")
print("ok", "entries[47].envelope.tempC.max", "=", 5)
assert pick(ops, "entries[17].id") == "cw.op.marinate", pick(ops, "entries[17].id")
print("ok", "entries[17].id", "=", "cw.op.marinate")
assert pick(ops, "entries[17].envelope.tempC.max") == 5, pick(ops, "entries[17].envelope.tempC.max")
print("ok", "entries[17].envelope.tempC.max", "=", 5)
assert pick(ops, "entries[17].envelope.hazards[0]") == "cw.hz.time_temperature", pick(ops, "entries[17].envelope.hazards[0]")
print("ok", "entries[17].envelope.hazards[0]", "=", "cw.hz.time_temperature")

# Step 5: A fridge thermometer is the first rung for chilling.
fridge = c.ladder("cw.op.chill", ["cw.sense.fridge_temp"], False, False)

# Step 6: The fridge rung.
assert fridge == "cw.sense.fridge_temp", fridge
print("ok", "fridge", "=", "cw.sense.fridge_temp")

print("scenario complete")

scenarios/038-cold-chain-in-the-kitchen.json

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