public MediatorTest(
ServiceProvider serviceProvider,
IPublishStrategyProvider defaultPublishStrategy = null
)
: base(serviceProvider, defaultPublishStrategy)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="Mediator"/> class.
/// </summary>
/// <param name="serviceProvider">A mechanism for retrieving a service object.</param>
/// <param name="defaultPublishStrategy">
/// The default way <see cref="IMediator"/> uses the list of
/// <see cref="NotificationHandler{TNotification}"/>. If not specified the value will be
/// <see cref="PublishStrategyProvider.ParallelWhenAll" />.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown when <paramref name="serviceProvider"/> is null.
/// </exception>
public Mediator(
ServiceProvider serviceProvider,
IPublishStrategyProvider defaultPublishStrategy = null)
{
ServiceProvider = Guard.ThrowIfNull(serviceProvider, nameof(serviceProvider));
DefaultPublishStrategy = defaultPublishStrategy ?? PublishStrategyProvider.ParallelWhenAll;
}
/// <summary>
/// Asynchronously sends a <typeparamref name="TNotification"/> to multiple handlers.
/// </summary>
/// <typeparam name="TNotification">The type of a notification.</typeparam>
/// <param name="notification">The notification sent to <see cref="IMediator"/>.</param>
/// <param name="publishStrategy">
/// The way <see cref="IMediator"/> uses the list of
/// <see cref="NotificationHandler{TNotification}"/>.
/// </param>
/// <param name="cancellationToken">
/// A cancellation token that should be used to cancel the work.
/// </param>
/// <returns>A task that represents the publish operation.</returns>
public Task PublishAsync <TNotification>(
TNotification notification,
IPublishStrategyProvider publishStrategy,
CancellationToken cancellationToken = default
)
where TNotification : INotification
{
Guard.ThrowIfNull(notification, nameof(notification));
Guard.ThrowIfNull(publishStrategy, nameof(publishStrategy));
cancellationToken.ThrowIfCancellationRequested();
var handler = (NotificationHandlerWrapper <TNotification>)NotificationHandlers.GetOrAdd(
typeof(TNotification),
type => new NotificationHandlerWrapper <TNotification>()
);
return(handler.HandleAsync(
notification,
publishStrategy.Resolve <TNotification>(),
ServiceProvider,
cancellationToken
));
}
