// Flagging the registration with WrapsInstanceCreationDelegate prevents false diagnostic warnings.
private InstanceProducer(Type serviceType, Expression expression, Container container)
: this(serviceType,
new ExpressionRegistration(expression, container) { WrapsInstanceCreationDelegate = true })
{
// Overrides earlier set value. This prevents ExpressionBuilt from being applied.
this.lazyExpression = Helpers.ToLazy(expression);
}
private InstanceProducer TryGetProducerFromUnregisteredTypeResolutionCacheOrAdd(
UnregisteredTypeEventArgs e)
{
lock (this.resolveUnregisteredTypeRegistrations)
{
if (this.resolveUnregisteredTypeRegistrations.ContainsKey(e.UnregisteredServiceType))
{
// This line will only get hit, in case a different thread came here first.
return(this.resolveUnregisteredTypeRegistrations[e.UnregisteredServiceType].Value);
}
var registration = e.Registration ?? new ExpressionRegistration(e.Expression, this);
// 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(e.UnregisteredServiceType, registration);
this.resolveUnregisteredTypeRegistrations[e.UnregisteredServiceType] =
Helpers.ToLazy(producer);
return(producer);
}
}
