Data retrieval in pullpoint mode – 2N Helios IP HTTP API Manual v2.8 User Manual

Page 10

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Data Retrieval in PullPoint Mode

To retrieve events from

in the PullPoint mode, create the PullPoint via

2N Helios IP

the

request, specifying the type of events to be retrieved and the

CreatePullPoint

subscription time.

If the subscription is successful,

sends the

2N Helios IP

CreatePullPointResponse

including the Subscription Id for subsequent communication with

2N Helios IP

Now you can read out events from

periodically using the

2N Helios IP

GetMessages

request.

sends the

including the list of

2N Helios IP

GetMessagesResponse

events. In case there is no event in the queue, the event list is empty in the response.

The subscription time is limited (as specified in the CreatePullPoint request). When the
subscription time expires, you will be unsubscribed automatically. To extend the
subscription time, send the

request before expiry.

will reply

Renew

2N Helios IP

with the

message.

RenewResponse

Send the

request to unsubscribe explicitly.

will reply with

Unsubscribe

2N Helios IP

the

message.

UnsubscribeResponse