/// <summary>
/// On arrival of a message which passes the given filter the caller
/// will be notified though the given delegate.
/// </summary>
/// <param name="messageFilter">The message filter.</param>
/// <param name="notifyAction">The action invoked when a matching message arrives.</param>
public void ActOnArrival(IMessageFilter messageFilter, IMessageProcessAction notifyAction)
{
{
Lokad.Enforce.Argument(() => messageFilter);
Lokad.Enforce.Argument(() => notifyAction);
}
lock (m_Lock)
{
if (IsLastChanceProcessor(notifyAction))
{
m_LastChanceProcessor = notifyAction;
return;
}
if (!m_Filters.ContainsKey(messageFilter))
{
m_Filters.Add(messageFilter, notifyAction);
}
}
}
private static bool IsLastChanceProcessor(IMessageProcessAction notifyAction)
{
var attributes = notifyAction.GetType().GetCustomAttributes(typeof(LastChanceMessageHandlerAttribute), false);
return(attributes.Length == 1);
}
