private void assertExportsAndDispose(MefSingletonComposer composer)
{
int composedCount = 0;
MefComposer lastComposer = null;
ComposerEventArgs <ContainerConfiguration> lastComposedEventArgs = null;
composer.Composed += (s, e) =>
{
++composedCount;
lastComposer = s as MefComposer;
lastComposedEventArgs = e;
};
Assert.AreSame(composer.Compose(), lastComposedEventArgs.Target);
Assert.AreEqual(1, composedCount);
Assert.IsNotNull(lastComposedEventArgs);
Assert.IsNotNull(lastComposedEventArgs.Target);
Assert.IsNotNull(lastComposer);
Assert.AreSame(composer, lastComposer);
IParent[] exports
= composer.ExportsList.OfType <IParent>()
.ToArray();
Helper.AssertValidParents(exports);
composer.Dispose();
if (composer.DisposeCompositionHostsWithThis)
{
Helper.AssertDisposedParents(exports);
}
else
{
Helper.AssertValidParents(exports);
}
}
/// <summary>
/// This method is virtual and implements
/// <see cref="IHandleComposed{TTarget}.HandleComposed{T}"/>.
/// This implementation invokes all participants added here.
/// Notice that each is invoked in a catch block, and this will trace exceptions,
/// AND re-throw a new <see cref="AggregateException"/> if there are
/// any exceptions.
/// </summary>
/// <param name="eventArgs"><see cref="IHandleComposed{TTarget}"/> argument.</param>
/// <exception cref="AggregateException"></exception>
public void HandleComposed <T>(ComposerEventArgs <T> eventArgs)
where T : TTarget
{
lock (Participants) {
checkDisposed();
List <Exception> exceptions = new List <Exception>(Participants.Count);
foreach (IHandleComposed <TTarget> participant
in Participants.OfType <IHandleComposed <TTarget> >())
{
try {
participant.HandleComposed(eventArgs);
} catch (Exception exception) {
TraceSources.For(GetType())
.Error(
exception,
"Participant exception invoking HandleComposed: {0}, '{1}'.",
participant,
exception.Message);
exceptions.Add(exception);
}
}
if (exceptions.Count != 0)
{
throw new AggregateException(
$"One or more exceptions was raised by a {GetType().GetFriendlyName()} participant in"
+ $" {nameof(IHandleComposed<TTarget>.HandleComposed)}.",
exceptions.EnumerateInReverse());
}
}
}
private void assertExportsAndDispose(MefComposer composer)
{
int composedCount = 0;
MefComposer lastComposer = null;
ComposerEventArgs <ContainerConfiguration> lastComposedEventArgs = null;
composer.Composed += (s, e) =>
{
++composedCount;
lastComposer = s as MefComposer;
lastComposedEventArgs = e;
};
Assert.AreSame(composer.Compose(), lastComposedEventArgs.Target);
Assert.AreEqual(1, composedCount);
Assert.IsNotNull(lastComposedEventArgs);
Assert.IsNotNull(lastComposedEventArgs.Target);
Assert.IsNotNull(lastComposer);
Assert.AreSame(composer, lastComposer);
CompositionHost compositionHost = lastComposedEventArgs.Target.CreateContainer();
List <IParent> parts = new List <IParent>(3);
parts.AddRange(compositionHost.GetExports <IParent>());
Assert.AreEqual(3, parts.Count);
Helper.AssertValidParents(parts);
composer.Dispose();
Helper.AssertValidParents(parts);
compositionHost.Dispose();
Helper.AssertDisposedParents(parts);
}
public void HandleBootstrap <T>(ComposerEventArgs <T> eventArgs)
where T : MyTarget
=> eventArgs.Target.Bootstrap();
public void HandleComposed <T>(ComposerEventArgs <T> eventArgs)
where T : TTarget
{
checkDisposed();
handleComposed?.Invoke(new ComposerEventArgs <TTarget>(eventArgs.Target));
}
public void HandleBootstrap <T>(ComposerEventArgs <T> eventArgs)
where T : TTarget
{
checkDisposed();
bootstrap?.Invoke(new ComposerEventArgs <TTarget>(eventArgs.Target));
}
public void HandleComposed <T>(ComposerEventArgs <T> eventArgs)
where T : TTarget
=> (Participant as IHandleComposed <TSuper>)?.HandleComposed(eventArgs);
public void HandleBootstrap <T>(ComposerEventArgs <T> eventArgs)
where T : TTarget
=> (Participant as IBootstrap <TSuper>)?.HandleBootstrap(eventArgs);