private static void ProcessAssemblyDownload(Byte[] data)
{
// and map the assembly
var _assembly = Assembly.Load(data);
AssemblyMapper.MapAssembly(_assembly);
}
public static IObservable <LoadedResourceInfo> LoadResource(Uri resourceUri)
{
Guard.ArgumentNotNull(resourceUri, "resourceUri");
Guard.ArgumentValue((resourceUri.ToString().EndsWith(DLL_EXT, StringComparison.OrdinalIgnoreCase) == false), "resourceUri",
DLL_ONLY_MESSAGE, resourceUri.ToString());
return(new LazyRelayObservable <LoadedResourceInfo>((o) =>
{
lock (_lock)
{
// if already loaded
if (_loadedPackages.Any((u) => IsUriEqual(u, resourceUri)))
{
o.OnNext(new LoadedResourceInfo(resourceUri, true, null));
o.OnCompleted();
return;
}
// if loading, we wait for it to be loaded
if (_loadingPackages.Any((u) => IsUriEqual(u, resourceUri)))
{
var _token = (IDisposable)null;
_token = ObservableExtensions.Subscribe(Channel <LoadedResourceInfo> .Public, (r) =>
{
if (IsUriEqual(r.ResourceUri, resourceUri))
{
o.OnNext(r);
o.OnCompleted();
_token.Dispose();
}
});
return;
}
// else add that we are loading
_loadingPackages.Add(resourceUri);
}
if (resourceUri.IsAbsoluteUri)
{
// and we load
var _webClient = new WebClient();
_webClient.DownloadDataCompleted += (s, e) =>
{
var _remoteResourceInfo = new LoadedResourceInfo(resourceUri, (!e.Cancelled && e.Error == null), e.Error);
lock (_lock)
{
_loadingPackages.Remove(resourceUri);
if (_remoteResourceInfo.IsLoaded)
{
_loadedPackages.Add(resourceUri);
ProcessAssemblyDownload(e.Result);
}
}
Channel <LoadedResourceInfo> .Public.OnNext(_remoteResourceInfo);
o.OnNext(_remoteResourceInfo);
o.OnCompleted();
};
_webClient.DownloadDataAsync(resourceUri);
}
else
{
var _remoteResourceInfo = (LoadedResourceInfo)null;
try
{
lock (_lock)
{
_loadingPackages.Remove(resourceUri);
var _fileName = resourceUri.OriginalString;
var _filePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, _fileName);
var _assembly = Assembly.LoadFile(_filePath);
_loadedPackages.Add(resourceUri);
AssemblyMapper.MapAssembly(_assembly);
_remoteResourceInfo = new LoadedResourceInfo(resourceUri, true, null);
}
}
catch (Exception ex)
{
_remoteResourceInfo = new LoadedResourceInfo(resourceUri, false, ex);
}
Channel <LoadedResourceInfo> .Public.OnNext(_remoteResourceInfo);
o.OnNext(_remoteResourceInfo);
o.OnCompleted();
}
}));
}
