/// <summary>
/// Invokes each subscriber method registered to handle the event.
/// </summary>
/// <param name="event"></param>
public void Publish(IEvent @event)
{
var eventName = @event.GetType().GetClassName();
var key = new EventOverrideKey
{
EventName = eventName,
IdentityTenant = @event.IdentityTenant
};
if (_overriders.Keys.Any(k => k.EventName == key.EventName && k.IdentityTenant == @event.IdentityTenant))
{
var customization = _overriders
.FirstOrDefault(kv => kv.Key.EventName == key.EventName && kv.Key.IdentityTenant == @event.IdentityTenant)
.Value;
customization?.Invoke(@event);
}
else if (_subscribers.ContainsKey(eventName))
{
var actions = _subscribers[eventName];
foreach (var action in actions)
{
action.Invoke(@event);
}
}
else
{
throw new UnhandledEventException(eventName);
}
}
/// <summary>
/// Register a custom tenant-specific handler for the event.
/// </summary>
public void Override <T>(Action <T> action, Guid tenant) where T : IEvent
{
var key = new EventOverrideKey
{
EventName = typeof(T).FullName,
IdentityTenant = tenant
};
if (_overriders.Any(x => x.Key.EventName == key.EventName && x.Key.IdentityTenant == key.IdentityTenant))
{
throw new AmbiguousCommandHandlerException(key.EventName);
}
_overriders.Add(key, (command) => action((T)command));
}