/// <summary>
/// Getter for the singleton instance for testing purposes.
/// This overload will be used for unit testing.
/// </summary>
/// <returns>The instance of the <see cref="IEventAggregator"/></returns>
internal static IEventAggregator GetInstance(IResolveInstances instanceResolver, bool createNewInstance)
{
if (_instance == null || (_instance != null && createNewInstance))
{
// first call to the event aggregator, lets initialize a new instance.
_instance = new EventAggregator(instanceResolver, true);
}
return(_instance);
}
/// <summary>
/// Private constructor for the singleton.
/// </summary>
private EventAggregator(IResolveInstances instanceResolver, bool preventLogging = false)
{
_preventLogging = preventLogging;
_hookRegistry = new PrioritizedEventListenerDictionary <Type, EventListenerRegistration>(new EventListenerRegistrationComparer());
_commandRegistry = new Dictionary <string, List <ICommandListener> >();
// Get all instances and try to gather all event listeners.
_plugins = instanceResolver.ResolveInstances <IPlugin>();
if (_plugins == null || _plugins.Count == 0)
{
LogUtility.Warning("[SK] No IPlugin instances found.");
return;
}
foreach (var plugin in _plugins)
{
try
{
var authors = plugin.getAuthors();
var formatted = string.Join(", ", authors);
var lastIndex = formatted.LastIndexOf(", ");
if (lastIndex > 0)
{
formatted = formatted.Remove(lastIndex, 2);
formatted = formatted.Insert(lastIndex, " & ");
}
LogUtility.Out("[SK] Loading plugin " + plugin.getPluginName() + " created by " + formatted);
plugin.onLoad();
plugin.RegisterEventListeners(this);
plugin.RegisterCommandListeners(this);
}
catch (Exception exception)
{
var wrappedException = new PluginInitializationException(plugin.GetType().AssemblyQualifiedName, exception.Message, exception);
LogUtility.Exception(wrappedException);
}
}
LogUtility.Out("[SK] EventAggregator initialized");
}