protected ServiceProviderEngine(IEnumerable <ServiceDescriptor> serviceDescriptors, IServiceProviderEngineCallback callback)
{
_createServiceAccessor = CreateServiceAccessor;
_callback = callback;
Root = new ServiceProviderEngineScope(this);
RuntimeResolver = new CallSiteRuntimeResolver();
ExpressionBuilder = new CallSiteExpressionBuilder(RuntimeResolver, this, Root);
CallSiteFactory = new CallSiteFactory(serviceDescriptors);
CallSiteFactory.Add(typeof(IServiceProvider), new ServiceProviderCallSite());
CallSiteFactory.Add(typeof(IServiceScopeFactory), new ServiceScopeFactoryCallSite());
}
internal static Func <ServiceProvider, object> RealizeService(ServiceTable table, Type serviceType, IServiceCallSite callSite)
{
var callCount = 0;
return(provider => {
if (Interlocked.Increment(ref callCount) == 2)
{
Task.Run(() => {
var realizedService = new CallSiteExpressionBuilder(_callSiteRuntimeResolver)
.Build(callSite);
table.RealizedServices[serviceType] = realizedService;
});
}
return _callSiteRuntimeResolver.Resolve(callSite, provider);
});
}
