/// <summary>
/// Adds Ears to a specified service collection.
/// </summary>
/// <param name="serviceCollection">The service collection to add the project to.</param>
/// <param name="eventManagerOptions">Options to configure the event manager.</param>
/// <param name="autoDiscoverLoggingFactory">
/// Whether to auto discovery a logging factory from the service container instead of it having to be manually
/// specified.
/// </param>
/// <returns>The service collection with Ears added.</returns>
public static IServiceCollection AddEars(
this IServiceCollection serviceCollection,
EventManagerOptions eventManagerOptions,
bool autoDiscoverLoggingFactory = false
)
{
EventManager BuildEventManager(IServiceProvider serviceProvider)
{
if (autoDiscoverLoggingFactory)
{
eventManagerOptions.LoggerFactory = serviceProvider.GetService <ILoggerFactory>();
}
return(new EventManager(eventManagerOptions, serviceProvider));
}
if (eventManagerOptions?.AssembliesToSearch != null)
{
var listeners = eventManagerOptions.AssembliesToSearch.GetDispatchersAndListeners();
foreach (var(listener, _) in listeners)
{
serviceCollection.AddTransient(listener);
}
}
return(serviceCollection
.AddSingleton <IEventManager, EventManager>(BuildEventManager));
}
/// <summary>
/// Initialises a new instance of the <see cref="EventManager"/> class with a set of options.
/// </summary>
/// <param name="eventManagerOptions">The options used to configure the event manager.</param>
/// <param name="serviceProvider">Provider used to resolve dependencies.</param>
internal EventManager(EventManagerOptions eventManagerOptions, IServiceProvider serviceProvider)
{
_eventManagerOptions = eventManagerOptions;
_serviceProvider = serviceProvider;
if (eventManagerOptions == null)
{
throw new ArgumentNullException(nameof(eventManagerOptions));
}
if (eventManagerOptions.AssembliesToSearch == null)
{
throw new NoConfiguredAssembliesException();
}
if (eventManagerOptions.AutoDiscoverListeners)
{
var listeners = eventManagerOptions.AssembliesToSearch.GetDispatchersAndListeners();
foreach (var(listener, ofEvent) in listeners)
{
RegisterListeners(ofEvent, listener);
}
}
if (_eventManagerOptions.LoggerFactory != null)
{
_logger = _eventManagerOptions.LoggerFactory.CreateLogger <EventManager>();
}
}