public static async Task <List <DiscoveryEndpoint> > GetEndpointsAsync()
{
using (endpointsLock.Lock())
{
if (endpoints.Count != 0)
{
endpoints.Clear();
}
// discovery json is now generated in Premise vb script to vastly improve discovery
// event response time
var returnClause = new[] { "discoveryJson", "IsDiscoverable" };
dynamic whereClause = new ExpandoObject();
whereClause.TypeOf = AlexaApplianceClassPath;
int count = 0;
// ReSharper disable once AsyncConverter.ConfigureAwaitHighlighting
var devices = await HomeObject.SelectAsync(returnClause, whereClause).ConfigureAwait(false);
foreach (var device in devices)
{
if (device.IsDiscoverable == false)
{
continue;
}
DiscoveryEndpoint endpoint;
try
{
string json = device.discoveryJson.ToString();
if (string.IsNullOrEmpty(json))
{
continue;
}
endpoint = JsonConvert.DeserializeObject <DiscoveryEndpoint>(json, new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore
});
}
catch
{
continue;
}
if (endpoint != null)
{
endpoints.Add(endpoint);
if (++count >= AlexaDeviceLimit)
{
break;
}
}
}
// Seems like a good idea here.
HostingEnvironment.QueueBackgroundWorkItem(ct => BackgroundGarbageCollectAsync());
return(endpoints);
}
}
