private ILifetimePolicy GetLifetimePolicyForGenericType(IBuilderContext context)
{
Type typeToBuild = context.BuildKey.Type;
object openGenericBuildKey = new NamedTypeBuildKey(typeToBuild.GetGenericTypeDefinition(),
context.BuildKey.Name);
IPolicyList factorySource;
ILifetimeFactoryPolicy factoryPolicy =
context.Policies.Get <ILifetimeFactoryPolicy>(openGenericBuildKey, out factorySource);
if (factoryPolicy != null)
{
// creating the lifetime policy can result in arbitrary code execution
// in particular it will likely result in a Resolve call, which could result in locking
// to avoid deadlocks the new lifetime policy is created outside the lock
// multiple instances might be created, but only one instance will be used
ILifetimePolicy newLifetime = factoryPolicy.CreateLifetimePolicy();
lock (this.genericLifetimeManagerLock)
{
// check whether the policy for closed-generic has been added since first checked
ILifetimePolicy lifetime = factorySource.GetNoDefault <ILifetimePolicy>(context.BuildKey, false);
if (lifetime == null)
{
factorySource.Set <ILifetimePolicy>(newLifetime, context.BuildKey);
lifetime = newLifetime;
}
return(lifetime);
}
}
return(null);
}
private static ILifetimePolicy GetLifetimePolicyForGenericType(IBuilderContext context)
{
Type typeToBuild = BuildKey.GetType(context.BuildKey);
object openGenericBuildKey =
BuildKey.ReplaceType(context.BuildKey, typeToBuild.GetGenericTypeDefinition());
ILifetimeFactoryPolicy factoryPolicy =
context.Policies.Get <ILifetimeFactoryPolicy>(openGenericBuildKey);
if (factoryPolicy != null)
{
ILifetimePolicy lifetime = factoryPolicy.CreateLifetimePolicy();
context.PersistentPolicies.Set <ILifetimePolicy>(lifetime, context.BuildKey);
return(lifetime);
}
return(null);
}
private static ILifetimePolicy GetLifetimePolicyForGenericType(IBuilderContext context)
{
Type typeToBuild = context.BuildKey.Type;
object openGenericBuildKey = new NamedTypeBuildKey(typeToBuild.GetGenericTypeDefinition(),
context.BuildKey.Name);
IPolicyList factorySource;
ILifetimeFactoryPolicy factoryPolicy =
context.Policies.Get <ILifetimeFactoryPolicy>(openGenericBuildKey, out factorySource);
if (factoryPolicy != null)
{
ILifetimePolicy lifetime = factoryPolicy.CreateLifetimePolicy();
factorySource.Set <ILifetimePolicy>(lifetime, context.BuildKey);
return(lifetime);
}
return(null);
}
/// <summary>
/// Create a new <see cref="LifetimeManagerFactory"/> that will
/// return instances of the given type, creating them by
/// resolving through the container.
/// </summary>
/// <param name="policy">LifetimeManager to create.</param>
public LifetimeManagerFactory(ExtensionContext containerContext, ILifetimeFactoryPolicy policy)
{
_containerContext = containerContext;
_policy = policy ?? throw new ArgumentNullException(nameof(policy));
LifetimeType = policy.GetType();
}
