事件

事件格式

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id: evt_01J4V8Q6YJJ1MB8Z4T9A0W7M0E
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event: cabinet.temperature_alert
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retry: 3000
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data: {"machine_id":"vm_shanghai_001","temperature_c":9.8,"threshold_c":8,"severity":"warning"}

id 全局唯一。客户端重连时通过 Last-Event-ID 恢复，服务端会从该事件之后继续发送。

事件类型

| 事件 | 严重级别 | 用途 | | --- | --- | --- | | machine.status_changed | info | 设备在线、离线、维护、暂停售卖状态变化。 | | machine.offline | critical | 设备超过心跳窗口未连接。 | | cabinet.temperature_alert | warning / critical | 冰柜温度超过配置阈值。 | | inventory.low_stock | warning | 某 SKU 或货道库存低于补货线。 | | order.dispense_failed | critical | 出餐失败，需要退款或人工处理。 | | heating.failed | critical | 微波炉加热失败或温度未达标。 | | maintenance.command_completed | info | 运维命令执行完成。 | | replenishment.completed | info | 补货任务完成并同步库存。 | | door.forced_open | critical | 维护门或取餐门异常打开。 |

事件流示例

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: heartbeat
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id: evt_01J4V8Q6YJJ1MB8Z4T9A0W7M0E
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event: machine.status_changed
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retry: 3000
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data: {"machine_id":"vm_shanghai_001","from":"offline","to":"online","occurred_at":"2026-05-12T10:15:30Z"}
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id: evt_01J4V90KWF8Z47D5V7G3P6E8XR
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event: inventory.low_stock
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data: {"machine_id":"vm_shanghai_001","slot_id":"A03","meal_sku":"meal_beef_rice","remaining":2,"reorder_point":5}
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id: evt_01J4V9M6R4Y1FMG7D9KMZ0PXSB
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event: heating.failed
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data: {"machine_id":"vm_shanghai_001","order_id":"order_01J4V8WZ7C8QK6RXQS7DD6F4ZV","reason":"TARGET_TEMPERATURE_NOT_REACHED","severity":"critical"}