public Task GetOrDownloadAsync(string url)
{
//simulate image download
IPendingOperation pendingOperation = null;
Console.WriteLine($"Downloading {url}");
Task.Delay(2000).ContinueWith(_ =>
{
Console.WriteLine($"Downloaded {url}");
pendingOperation.Complete();
});
pendingOperation = ServiceRef.RegisterPendingOperation(this, actionOnCompletion: (res) =>
{
//Accessing _images here would be risky, just wrap the call...
ServiceRef.Call(this, () =>
{
Console.WriteLine($"Adding to images {url}");
_images.Add(new ImageStuff()
{
Url = url, Data = new byte[] { 0x01 }
});
Console.WriteLine($"Added to images {url}");
});
});
return(Task.CompletedTask);
}
public void BeginOperation()
{
_pendingOperation = ServiceRef.RegisterPendingOperation(this);
Task.Factory.StartNew(() =>
{
//simulate some work
Task.Delay(1000).Wait();
ServiceRef.Create <IPendingOpsService>(this)
.CompleteOperation();
});
}
public Task <bool> BeginOperationAsync()
{
_pendingOperation = ServiceRef.RegisterPendingOperation(this, () => OperationCompleted);
Task.Run(async() =>
{
//simulate some work
await Task.Delay(1000);
await ServiceRef.Create <IPendingOpsServiceAsync>(this)
.CompleteOperationAsync();
});
return(Task.FromResult(false));
}
public Task GetOrDownloadAsync(string url)
{
//simulate image download
var downloadedEvent = new AutoResetEvent(false);
Console.WriteLine($"Downloading {url}");
Task.Delay(10000).ContinueWith(_ =>
{
Console.WriteLine($"Downloaded {url}");
_images.Add(new ImageStuff()
{
Url = url, Data = new byte[] { 0x01 }
});
downloadedEvent.Set();
});
ServiceRef.RegisterPendingOperation(this, downloadedEvent);
return(Task.CompletedTask);
}
