Working on setting Cygnus as a sink to CKAN, and I get this error, what part of Cygnus setup is responsible for this( subscription, configuration ...)
cygnus_1 | time=2018-10-01T12:40:04.517Z | lvl=DEBUG | corr=1ea858dc-c577-
11e8-b0fd-0242ac140003 | trans=5c553916-f5e6-4bbc-b98a-bcaba61a306c |
srv=waste4think | subsrv=/room/test | comp=cygnus-ngsi | op=getEvents |
msg=com.telefonica.iot.cygnus.handlers.NGSIRestHandler[320] :
[NGSIRestHandler] Parsed NotifyContextRequest:{"
subscriptionId":"5bb2153fd1bde90f8813b236","originator":"null","contextResponse
s":[]}
I assume the error is connected to this contextResponses because it is empty, but I found no additional info what is causing this where I should look. And the error is not helping.
This is the more general question that issue since I cannot call this issue because I have no idea if it is me who is causing this or Cygnus to have indeed some problems.
Thanks.
When setting up the subscription, Cygnus currently only accepts notifications in the older NGSI v1 format- the attrsFormat=legacy is therefore needed.
e.g.
curl -iX POST \
'http://localhost:1026/v2/subscriptions' \
-H 'Content-Type: application/json' \
-H 'fiware-service: openiot' \
-H 'fiware-servicepath: /' \
-d '{
"description": "Notify Cygnus of all context changes",
"subject": {
"entities": [
{
"idPattern": ".*"
}
]
},
"notification": {
"http": {
"url": "http://cygnus:5050/notify"
},
"attrsFormat": "legacy"
},
"throttling": 5
}'
Further information about setting up subscriptions in Cygnus can be found in the Cygnus Tutorial