DeviceLoaderSynchronizer GetOrCreateLoadingDevicesRequestQueue(string devAddr)
{
// Need to get and ensure it has started since the GetOrAdd can create multiple objects
// https://github.com/aspnet/Extensions/issues/708
lock (this.getOrCreateLoadingDevicesRequestQueueLock)
{
return(this.cache.GetOrCreate <DeviceLoaderSynchronizer>(
$"devaddrloader:{devAddr}",
(ce) =>
{
var cts = new CancellationTokenSource();
ce.ExpirationTokens.Add(new CancellationChangeToken(cts.Token));
var destinationDictionary = this.InternalGetCachedDevicesForDevAddr(devAddr);
var originalDeviceCount = destinationDictionary.Count;
var loader = new DeviceLoaderSynchronizer(
devAddr,
this.loRaDeviceAPIService,
this.deviceFactory,
destinationDictionary,
this.initializers,
this.configuration,
(t, l) =>
{
// If the operation to load was successfull
// wait for 30 seconds for pending requests to go through and avoid additional calls
if (t.IsCompletedSuccessfully && !l.HasLoadingDeviceError && this.DevAddrReloadInterval > TimeSpan.Zero)
{
// remove from cache after 30 seconds
cts.CancelAfter(this.DevAddrReloadInterval);
}
else
{
// remove from cache now
cts.Cancel();
}
},
(l) => this.UpdateDeviceRegistration(l));
return loader;
}));
}
}
private DeviceLoaderSynchronizer GetOrCreateLoadingDevicesRequestQueue(DevAddr devAddr)
{
// Need to get and ensure it has started since the GetOrAdd can create multiple objects
// https://github.com/aspnet/Extensions/issues/708
lock (this.getOrCreateLoadingDevicesRequestQueueLock)
{
return(this.cache.GetOrCreate(
GetDevLoaderCacheKey(devAddr),
(ce) =>
{
var cts = new CancellationTokenSource();
ce.ExpirationTokens.Add(new CancellationChangeToken(cts.Token));
var loader = new DeviceLoaderSynchronizer(
devAddr,
this.loRaDeviceAPIService,
this.deviceFactory,
this.configuration,
this.deviceCache,
this.initializers,
this.loggerFactory.CreateLogger <DeviceLoaderSynchronizer>());
_ = loader.LoadAsync().ContinueWith((t) =>
{
// If the operation to load was successfull
// wait for 30 seconds for pending requests to go through and avoid additional calls
if (t.IsCompletedSuccessfully && !loader.HasLoadingDeviceError && DevAddrReloadInterval > TimeSpan.Zero)
{
// remove from cache after 30 seconds
cts.CancelAfter(DevAddrReloadInterval);
}
else
{
// remove from cache now
cts.Cancel();
}
}, TaskScheduler.Default);
return loader;
}));
}
}
