void function ( ) { }
close any opened announce connection . this method is called by announce #stop to make sure all connectionsare correctly closed when the announce thread is asked to stop . concode_field_sep Set<AnnounceResponseListener> listeners concode_elem_sep Peer peer concode_elem_sep SharedTorrent torrent concode_elem_sep URI tracker concode_field_sep String formatAnnounceEvent concode_elem_sep void handleTrackerAnnounceResponse concode_elem_sep void fireAnnounceResponseEvent concode_elem_sep void fireDiscoveredPeersEvent concode_elem_sep URI getTrackerURI concode_elem_sep void announce concode_elem_sep void register