/// <summary>
/// Stops the journaler; derived classes may override this method to perform
/// additional logic when stopping. The registration key controls the journaler's
/// registration with the underlying IEventListener. At the time of the call
/// the registration is suspended (journaler is no longer receiving LWES events).
/// It is the responsibility of the derived class to either call the base-class
/// PerformStop method or cancel the registration key. The journaler will hold
/// the registration key indefinitely if it is not canceled.
/// </summary>
/// <param name="registrationKey"></param>
/// <returns></returns>
protected virtual bool PerformStop(ISinkRegistrationKey registrationKey)
{
if (registrationKey == null) throw new ArgumentNullException("registrationKey");
registrationKey.Cancel();
return true;
}
