NGSI Source

This custom node is a simple node that allows to obtain NGSIv2 entities.

Properties

• name: a name for a node instance
• Context Broker: an endpoint of a context broker
• ServicePath: FIWARE Service Path
• Representation: normalized or keyValues
• Entity type: affected entity type
• ID pattern: entity ID pattern of affected entities
• Attrs: list of attributes to retrieve
• Query: query conditions using Simple Query Language
• Buffering: whether to output all retrieved entities at once
• Decode forbidden chars: off or on

Input

payload JSON Object

A msg.payload should contain a query condition to retrieves NGSIv2 entitites.

{
  "idPattern": ".*",
  "type": "T",
  "attrs": [
    "humidity"
  ],
  "q": "temperature>29",
  "keyValues": true
}

Output

payload JSON Array

A msg.payload contains NGSIv2 entities.

statusCode Number

A msg.statusCode contains a status code.

200

Examples

Input 1

{
  "idPattern": ".*"
}

Output 1

[
  {
    "id": "E1",
    "type": "T",
    "humidity": {
      "type": "Number",
      "value": 51,
      "metadata": {}
    },
    "temperature": {
      "type": "Number",
      "value": 25,
      "metadata": {}
    }
  },
  {
    "id": "E2",
    "type": "T",
    "humidity": {
      "type": "Number",
      "value": 50,
      "metadata": {}
    },
    "temperature": {
      "type": "Number",
      "value": 30,
      "metadata": {}
    }
  }
]

Input 2

{
  "type": "T",
  "attrs": [
    "humidity"
  ]
}

Output 2

[
  {
    "id": "E1",
    "type": "T",
    "humidity": {
      "type": "Number",
      "value": 51,
      "metadata": {}
    }
  },
  {
    "id": "E2",
    "type": "T",
    "humidity": {
      "type": "Number",
      "value": 50,
      "metadata": {}
    }
  }
]

Input 3

{
  "type": "T",
  "q": "temperature>29"
}

Output 3

[
  {
    "id": "E2",
    "type": "T",
    "humidity": {
      "type": "Number",
      "value": 50,
      "metadata": {}
    },
    "temperature": {
      "type": "Number",
      "value": 30,
      "metadata": {}
    }
  }
]

Input 4

{
  "type": "T",
  "q": "temperature>29",
  "keyValues": true
}

Output 4

[
  {
    "id": "E2",
    "type": "T",
    "humidity": 50,
    "temperature": 30
  }
]