Fiware Orion Context Broker: Restrictions on subscriptions

2
votes

Does Orion support restrictions on subscriptions? Ex. I want to receive context updates only when temperature > 30

1
fiwarefiware-orion
Have you tried something so far? – IlGala
I've tried an older version of Orion back in March. I don't know if the feature has been implemented (it's in the API). – E. Marotti

1 Answers

0
votes

That functionality is not implemented in NGSIv1, but planned for NGSIv2 (see conditions field in "Subscriptions" at the NGSIv2 draft specification). However, it has not been yet implemented in the last Orion version at the time of writting this (0.25.0).

EDIT: this functionality has been finally implemented in Orion 0.27.0, eg:

POST /v2/subscriptions
...

{
    "subject": {
        "entities": [
            {
                "idPattern": ".*",
                "type": "device"
            }
        ],
        "condition": {
            "attributes": [ "temperature" ],
            "expression": {
               "q": "temperature>30"
            }
         }
    },
    "notification": {
        "callback": "http://foo.bar:5050/notify",
        "attributes": [ ]
    },
    "expires": "2050-04-05T14:00:00.00Z"
}