async Task InitializeInstanceAsync()
{
var timings = new Dictionary <string, long> ();
var metadata = new CompositionLoadMetadata(timings);
using (var timer = Counters.CompositionLoad.BeginTiming(metadata)) {
var fullTimer = System.Diagnostics.Stopwatch.StartNew();
var stepTimer = System.Diagnostics.Stopwatch.StartNew();
var mefAssemblies = ReadAssembliesFromAddins(timer);
timings ["ReadFromAddins"] = stepTimer.ElapsedMilliseconds;
stepTimer.Restart();
var caching = new Caching(mefAssemblies);
// Try to use cached MEF data
var canUse = metadata.ValidCache = caching.CanUse();
if (canUse)
{
LoggingService.LogInfo("Creating MEF composition from cache");
RuntimeComposition = await TryCreateRuntimeCompositionFromCache(caching);
}
timings ["LoadFromCache"] = stepTimer.ElapsedMilliseconds;
stepTimer.Restart();
// Otherwise fallback to runtime discovery.
if (RuntimeComposition == null)
{
LoggingService.LogInfo("Creating MEF composition from runtime");
var(runtimeComposition, catalog) = await CreateRuntimeCompositionFromDiscovery(caching, timer);
RuntimeComposition = runtimeComposition;
CachedComposition cacheManager = new CachedComposition();
caching.Write(RuntimeComposition, catalog, cacheManager).Ignore();
}
timings ["LoadRuntimeComposition"] = stepTimer.ElapsedMilliseconds;
stepTimer.Restart();
ExportProviderFactory = RuntimeComposition.CreateExportProviderFactory();
ExportProvider = ExportProviderFactory.CreateExportProvider();
HostServices = MefV1HostServices.Create(ExportProvider.AsExportProvider());
ExportProviderV1 = NetFxAdapters.AsExportProvider(ExportProvider);
timings ["CreateServices"] = stepTimer.ElapsedMilliseconds;
metadata.Duration = fullTimer.ElapsedMilliseconds;
}
}
protected override Task OnInitialize(ServiceProvider serviceProvider)
{
return(Runtime.RunInMainThread(() => {
var timings = new Dictionary <string, long> ();
var metadata = new CompositionLoadMetadata(timings);
var timer = Counters.CompositionLoad.BeginTiming(metadata);
var stepTimer = System.Diagnostics.Stopwatch.StartNew();
var mefAssemblies = ReadAssembliesFromAddins(timer);
timings ["ReadFromAddins"] = stepTimer.ElapsedMilliseconds;
return Task.Run(() => InitializeInstanceAsync(timer, mefAssemblies));
}));
}
