/**
* Returns the discovered items of a given XMPP entity addressed by its JID and note attribute.
* Use this message only when trying to query information which is not directly addressable.
*
* @param entityID the address of the XMPP entity.
* @param node the attribute that supplements the 'jid' attribute.
* @return the discovered items.
* @throws XMPPException if the operation failed for some reason.
*/
public DiscoverItems discoverItems(String entityID, String node) throws XMPPException {
// Discover the entity's items
DiscoverItems disco = new DiscoverItems();
disco.setType(IQ.Type.GET);
disco.setTo(entityID);
disco.setNode(node);
// Create a packet collector to listen for a response.
PacketCollector collector =
connection.createPacketCollector(new PacketIDFilter(disco.getPacketID()));
connection.sendPacket(disco);
// Wait up to 5 seconds for a result.
IQ result = (IQ) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
// Stop queuing results
collector.cancel();
if (result == null) {
throw new XMPPException("No response from the server.");
}
if (result.getType() == IQ.Type.ERROR) {
throw new XMPPException(result.getError());
}
return (DiscoverItems) result;
}
private static void processResponse(XmlMessage xmlMessage, PacketCollector collector) {
boolean gotResponse = false;
while (!gotResponse) {
Message response = (Message) collector.nextResult(RESPONSE_TIMEOUT);
if (response == null) break;
final Collection<PacketExtension> extensions = response.getExtensions();
for (PacketExtension o : extensions) {
if (o instanceof JDOMExtension) {
JDOMExtension extension = (JDOMExtension) o;
if (RESPONSE.equals(extension.getElement().getName())) {
xmlMessage.processResponse(extension.getElement());
gotResponse = true;
break;
}
}
}
}
}
/**
* Sends enable or disable carbon packet to the server.
*
* @param enable if <tt>true</tt> sends enable packet otherwise sends disable packet.
*/
private void enableDisableCarbon(final boolean enable) {
IQ iq =
new IQ() {
@Override
public String getChildElementXML() {
return "<" + (enable ? "enable" : "disable") + " xmlns='urn:xmpp:carbons:2' />";
}
};
Packet response = null;
try {
PacketCollector packetCollector =
jabberProvider
.getConnection()
.createPacketCollector(new PacketIDFilter(iq.getPacketID()));
iq.setFrom(jabberProvider.getOurJID());
iq.setType(IQ.Type.SET);
jabberProvider.getConnection().sendPacket(iq);
response = packetCollector.nextResult(SmackConfiguration.getPacketReplyTimeout());
packetCollector.cancel();
} catch (Exception e) {
logger.error("Failed to enable carbon.", e);
}
isCarbonEnabled = false;
if (response == null) {
logger.error("Failed to enable carbon. No response is received.");
} else if (response.getError() != null) {
logger.error("Failed to enable carbon: " + response.getError());
} else if (!(response instanceof IQ) || !((IQ) response).getType().equals(IQ.Type.RESULT)) {
logger.error("Failed to enable carbon. The response is not correct.");
} else {
isCarbonEnabled = true;
}
}