JSONPath.md

JSONPATH Examples

When a DataStream has observationType set to OM_Observation, the metric configuration will include a field to set a JSONPath expression.

The JSONPath expression is applied to the value of Observation's value.result.

Examples

Object

Observations:

{
    "value": [
      {
        "phenomenonTime": "2020-07-21T09:52:05.062Z",
        "result": {
          "x": 1,
          "y": 2,
          "z": 3
        }
      },
      {
        "phenomenonTime": "2020-07-21T09:54:14.962Z",
        "result": {
          "x": 6,
          "y": 6,
          "z": 6
        }
      }
    ]
}

JSONPath to select x values:

$.x

Object with array of objects

Observations:

{
    "value": [
      {
        "phenomenonTime": "2020-07-21T09:52:05.062Z",
        "result": {
          "entries":[
            {
              "name":"x",
              "measurement":10
            },
            {
              "name":"y",
              "measurement":2
            }
          ]
        }
      },
      {
        "phenomenonTime": "2020-07-21T09:54:14.962Z",
        "result": {
          "entries":[
            {
              "name":"x",
              "measurement":20
            },
            {
              "name":"y",
              "measurement":2
            }
          ]
        }
      }
    ]
}

JSONPath to select measurement values of objects with x name:

$.entries[?(@.name=='x')].measurement