{
  "key": "REALTIME_EVENT_AGGREGATOR",
  "nodeType": "PROCESSOR",
  "operatorType": "REALTIME_EVENT_AGGREGATOR",
  "metadata": {
    "groupFields": [],
    "aggregationFields": [
      {
        "field": null,
        "aggregation": "SUM",
        "targetField": null
      }
    ],
    "stateExpireTime": "7 days"
  },
  "label": "Realtime Event Aggregator",
  "assumptions": [
    {
      "path": "stateExpireTime",
      "value": "7 days",
      "reason": "7-day rolling state is the default for real-time aggregation windows.",
      "confidence": 0.8
    },
    {
      "path": "aggregationFields[0].aggregation",
      "value": "SUM",
      "reason": "SUM is the most common real-time aggregation function for usage events.",
      "confidence": 0.85
    },
    {
      "path": "aggregationFields[0].targetField",
      "value": "totalQuantity",
      "reason": "Default output field name for the aggregated value.",
      "confidence": 0.7
    }
  ],
  "blockers": [
    {
      "path": "groupFields",
      "message": "REALTIME_EVENT_AGGREGATOR groupFields is required. Which fields define the aggregation key? (e.g. [\"accountNumber\"] or [\"accountNumber\", \"subscriptionNumber\"])"
    },
    {
      "path": "aggregationFields[0].field",
      "message": "REALTIME_EVENT_AGGREGATOR aggregation source field is required. Which event field should be aggregated?"
    }
  ],
  "hints": {
    "groupFields": "event field names from schema properties to group by (e.g. [\"accountNumber\"])",
    "aggregationFields[].field": "event field name from schema properties to aggregate",
    "aggregationFields[].aggregation": "SUM | MIN | MAX | AVG | COUNT | DELTA",
    "aggregationFields[].targetField": "output field name; defaults to source field name if omitted"
  }
}