/**
* Add the event and vector of listeners to the queue to be delivered.
*
* @param event the event
* @param vector the vector of listeners
*/
protected void queueEvent(MailEvent event, Vector vector) {
/*
* Copy the vector in order to freeze the state of the set
* of EventListeners the event should be delivered to prior
* to delivery. This ensures that any changes made to the
* Vector from a target listener's method during the delivery
* of this event will not take effect until after the event is
* delivered.
*/
Vector v = (Vector) vector.clone();
q.enqueue(event, v);
}
