conduit that will be associated to the selector; must be a valid conduit (i.e. not null and open).
bit mask of Event values that represent the events that will be tracked for the conduit.
optional object with application-specific data that will be available when an event is triggered for the conduit
RegisteredConduitException if the conduit had already been registered to the selector.
selector.register(conduit, Event.Read | Event.Write, object);
Associate a conduit to the selector and track specific I/O events. If a conduit is already associated with the selector, the events and attachment are upated.