/// <summary>
/// Attaches to a <c>Disposed</c> event in the object being built.
/// </summary>
public override object BuildUp(IBuilderContext context, Type typeToBuild, object existing, string idToBuild)
{
object result = base.BuildUp(context, typeToBuild, existing, idToBuild);
ISingletonPolicy policy = context.Policies.Get <ISingletonPolicy>(typeToBuild, idToBuild);
if (result != null && policy != null && policy.IsSingleton)
{
IComponent component = result as IComponent;
if (component != null)
{
component.Disposed += new DisposedHandlerClosure(context.Locator,
new DependencyResolutionLocatorKey(typeToBuild, idToBuild)).OnDisposed;
}
else
{
EventInfo disposedEvent = result.GetType().GetEvent("Disposed");
if (disposedEvent != null)
{
try
{
disposedEvent.AddEventHandler(result, new EventHandler(
new DisposedHandlerClosure(context.Locator,
new DependencyResolutionLocatorKey(typeToBuild, idToBuild)).OnDisposed));
}
catch
{
// Disposed event is not an EventHandler
}
}
}
}
return(result);
}
public override object BuildUp(IBuilderContext context,
object buildKey,
object existing)
{
if (context.Locator == null || context.Lifetime == null)
{
return(base.BuildUp(context, buildKey, existing));
}
if (context.Locator.Contains(buildKey))
{
return(context.Locator.Get(buildKey));
}
existing = base.BuildUp(context, buildKey, existing);
ISingletonPolicy singletonPolicy = context.Policies.Get <ISingletonPolicy>(buildKey);
if (singletonPolicy != null && singletonPolicy.IsSingleton)
{
context.Locator.Add(buildKey, existing);
context.Lifetime.Add(existing);
}
return(existing);
}
private static void RegisterObject(IBuilderContext context, Type typeToBuild, object existing, string idToBuild)
{
if (context.Locator != null)
{
ILifetimeContainer lifetime = context.Locator.Get <ILifetimeContainer>(typeof(ILifetimeContainer), SearchMode.Local);
if (lifetime != null)
{
ISingletonPolicy singletonPolicy = context.Policies.Get <ISingletonPolicy>(typeToBuild, idToBuild);
if (singletonPolicy != null && singletonPolicy.IsSingleton)
{
lock (context.Locator)
{
context.Locator.Add(new DependencyResolutionLocatorKey(typeToBuild, idToBuild), existing);
}
lock (lifetime)
{
lifetime.Add(existing);
}
}
}
}
}
/// <summary>
/// Called during the chain of responsibility for a build operation. The
/// PostBuildUp method is called when the chain has finished the PreBuildUp
/// phase and executes in reverse order from the PreBuildUp calls.
/// </summary>
/// <param name="context">Context of the build operation.</param>
// FxCop suppression: Validation is done by Guard class
public override void PostBuildUp(IBuilderContext context)
{
base.PostBuildUp(context);
if (context.Locator != null && context.Lifetime != null)
{
ISingletonPolicy singletonPolicy = context.Policies.Get <ISingletonPolicy>(context.BuildKey);
if (singletonPolicy != null && singletonPolicy.IsSingleton)
{
context.Locator.Add(context.BuildKey, context.Existing);
context.Lifetime.Add(context.Existing);
}
}
}
private void RegisterObject(IBuilderContext context, Type typeToBuild, object existing, string idToBuild)
{
if (context.Locator != null)
{
ILifetimeContainer lifetime = context.Locator.Get <ILifetimeContainer>(typeof(ILifetimeContainer), SearchMode.Local);
if (lifetime != null)
{
ISingletonPolicy singletonPolicy = context.Policies.Get <ISingletonPolicy>(typeToBuild, idToBuild);
if (singletonPolicy != null && singletonPolicy.IsSingleton)
{
context.Locator.Add(new DependencyResolutionLocatorKey(typeToBuild, idToBuild), existing);
lifetime.Add(existing);
if (TraceEnabled(context))
{
TraceBuildUp(context, typeToBuild, idToBuild, Properties.Resources.SingletonRegistered);
}
}
}
}
}
private static bool IsSingleton(IBuilderContext context, DependencyResolutionLocatorKey key)
{
ISingletonPolicy policy = context.Policies.Get <ISingletonPolicy>(key.Type, key.ID);
return(policy != null && policy.IsSingleton);
}
