private InstanceProducer TryGetProducerFromUnregisteredTypeResolutionCacheOrAdd(
UnregisteredTypeEventArgs e)
{
Type serviceType = e.UnregisteredServiceType;
var registration = e.Registration ?? new ExpressionRegistration(e.Expression, this);
lock (this.resolveUnregisteredTypeRegistrations)
{
if (this.resolveUnregisteredTypeRegistrations.ContainsKey(serviceType))
{
// This line will only get hit, in case a different thread came here first.
return(this.resolveUnregisteredTypeRegistrations[serviceType]);
}
// By creating the InstanceProducer after checking the dictionary, we prevent the producer
// from being created twice when multiple threads are running. Having the same duplicate
// producer can cause a torn lifestyle warning in the container.
var producer = new InstanceProducer(serviceType, registration);
this.resolveUnregisteredTypeRegistrations[serviceType] = producer;
return(producer);
}
}
private InstanceProducer TryGetInstanceProducerThroughResolveUnregisteredTypeEvent(Type serviceType)
{
if (this.resolveUnregisteredType == null)
{
return(null);
}
var e = new UnregisteredTypeEventArgs(serviceType);
this.resolveUnregisteredType(this, e);
return(e.Handled
? this.TryGetProducerFromUnregisteredTypeResolutionCacheOrAdd(e)
: null);
}
private InstanceProducer TryBuildInstanceProducerThroughUnregisteredTypeResolution(Type serviceType)
{
var e = new UnregisteredTypeEventArgs(serviceType);
if (this.resolveUnregisteredType != null)
{
this.resolveUnregisteredType(this, e);
}
if (e.Handled)
{
var registration = e.Registration ?? new ExpressionRegistration(e.Expression, this);
return(new InstanceProducer(serviceType, registration));
}
else
{
return(null);
}
}