// Wait for a presence packet back from the server.
PacketFilter responseFilter =
new AndFilter(
new FromMatchesFilter(room + "/" + nickname),
new PacketTypeFilter(Presence.class));
PacketCollector response = connection.createPacketCollector(responseFilter);
// Send join packet.
connection.sendPacket(joinPresence);
// Wait up to a certain number of seconds for a reply.
Presence presence =
(Presence) response.nextResult(SmackConfiguration.getPacketReplyTimeout());
// Stop queuing results
response.cancel();
if (presence == null) {
throw new XMPPException("No response from server.");
}
else if (presence.getError() != null) {