/// <summary>
/// Constructs a new observe relation.
/// </summary>
/// <param name="config">the config</param>
/// <param name="endpoint">the observing endpoint</param>
/// <param name="resource">the observed resource</param>
/// <param name="exchange">the exchange that tries to establish the observe relation</param>
public ObserveRelation(ICoapConfig config, ObservingEndpoint endpoint, IResource resource, Exchange exchange)
{
_config = config ?? throw ThrowHelper.ArgumentNull("config");
_endpoint = endpoint ?? throw ThrowHelper.ArgumentNull("endpoint");
Resource = resource ?? throw ThrowHelper.ArgumentNull("resource");
Exchange = exchange ?? throw ThrowHelper.ArgumentNull("exchange");
Key = $"{Source}#{exchange.Request.TokenString}";
}
public ObserveRelation GetRelation(System.Net.EndPoint source, Byte[] token)
{
ObservingEndpoint remote = GetObservingEndpoint(source);
return(remote == null ? null : remote.GetObserveRelation(token));
}
