public CoapObserveRelation(Request request, IEndPoint endpoint, ICoapConfig config)
{
_config = config;
_request = request;
_endpoint = endpoint;
_orderer = new ObserveNotificationOrderer(config);
request.Reregistering += OnReregister;
}
private void OnReregister(Object sender, ReregisterEventArgs e)
{
// TODO: update request in observe handle for correct cancellation?
//_request = e.RefreshRequest;
// reset orderer to accept any sequence number since server might have rebooted
_orderer = new ObserveNotificationOrderer(_config);
}
private CoapObserveRelation ObserveAsync(Request request, Action<Response> notify, Action<FailReason> error)
{
IEndPoint endpoint = GetEffectiveEndpoint(request);
ObserveNotificationOrderer orderer = new ObserveNotificationOrderer(_config);
CoapObserveRelation relation = new CoapObserveRelation(request, endpoint);
request.Respond += (o, e) =>
{
Response resp = e.Response;
lock (orderer)
{
if (orderer.IsNew(resp))
{
relation.Current = resp;
Deliver(notify, e);
}
else
{
if (log.IsDebugEnabled)
log.Debug("Dropping old notification: " + resp);
}
}
};
Action<FailReason> fail = r =>
{
relation.Canceled = true;
Fail(error, r);
};
request.Reject += (o, e) => fail(FailReason.Rejected);
request.Timeout += (o, e) => fail(FailReason.TimedOut);
Prepare(request, endpoint).Send();
return relation;
}