/*
* The MIT License (MIT)
*
* Copyright (c) 2014 Christian Schudt
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rocks.xmpp.extensions.bob;
import rocks.xmpp.core.Jid;
import rocks.xmpp.core.XmppException;
import rocks.xmpp.core.session.ExtensionManager;
import rocks.xmpp.core.session.SessionStatusEvent;
import rocks.xmpp.core.session.SessionStatusListener;
import rocks.xmpp.core.session.XmppSession;
import rocks.xmpp.core.stanza.IQEvent;
import rocks.xmpp.core.stanza.IQListener;
import rocks.xmpp.core.stanza.model.StanzaError;
import rocks.xmpp.core.stanza.model.client.IQ;
import rocks.xmpp.core.stanza.model.errors.ItemNotFound;
import rocks.xmpp.extensions.bob.model.Data;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* @author Christian Schudt
*/
class BitsOfBinaryManager extends ExtensionManager {
private final Map<String, Data> dataCache = new ConcurrentHashMap<>();
private BitsOfBinaryManager(final XmppSession xmppSession) {
super(xmppSession, "urn:xmpp:bob");
xmppSession.addSessionStatusListener(new SessionStatusListener() {
@Override
public void sessionStatusChanged(SessionStatusEvent e) {
if (e.getStatus() == XmppSession.Status.CLOSED) {
dataCache.clear();
}
}
});
xmppSession.addIQListener(new IQListener() {
@Override
public void handle(IQEvent e) {
IQ iq = e.getIQ();
if (e.isIncoming() && isEnabled() && !e.isConsumed() && iq.getType() == IQ.Type.GET) {
Data data = iq.getExtension(Data.class);
if (data != null) {
// The recipient then would either return an error (e.g., <item-not-found/> if it does not have data matching the Content-ID) or return the data.
Data cachedData = dataCache.get(data.getContentId());
if (cachedData != null) {
IQ result = iq.createResult();
result.setExtension(cachedData);
xmppSession.send(result);
} else {
xmppSession.send(iq.createError(new StanzaError(new ItemNotFound())));
}
e.consume();
}
}
}
});
}
/**
* Retrieves data from another entity.
*
* @param contentId Gets the data from
* @param to The recipient. This should be a full JID.
* @return The data.
* @throws rocks.xmpp.core.stanza.model.StanzaException If the entity returned a stanza error, e.g. {@link rocks.xmpp.core.stanza.model.errors.ItemNotFound}, if the data was not found.
* @throws rocks.xmpp.core.session.NoResponseException If the entity did not respond.
*/
public Data getData(String contentId, Jid to) throws XmppException {
IQ result = xmppSession.query(new IQ(to, IQ.Type.GET, new Data(contentId)));
Data data = result.getExtension(Data.class);
// // Only cache the data, if the max-age attribute absent or not zero.
// if (data != null && (data.getMaxAge() != null && data.getMaxAge() != 0 || data.getMaxAge() == null)) {
// dataCache.put(contentId, data);
// }
return data;
}
/**
* Puts data to the data cache, so that requests to this data can be returned.
* Whenever you use {@link Data} (i.e. its content id) anywhere, you should make it known to this manager, so that it can return the data to a requesting entity.
*
* @param data The data.
*/
public void put(Data data) {
dataCache.put(data.getContentId(), data);
}
}