/**
* Implements {@link PacketListener}. Notifies this instance that a specific {@link Packet} (which
* this instance has already expressed interest into by returning <tt>true</tt> from {@link
* #accept(Packet)}) has been received.
*
* @param packet the <tt>Packet</tt> which has been received and which this instance is given a
* chance to process
*/
public void processPacket(Packet packet) {
/*
* As we do elsewhere, acknowledge the receipt of the Packet first and
* then go about our business with it.
*/
IQ iq = (IQ) packet;
if (iq.getType() == IQ.Type.SET)
protocolProvider.getConnection().sendPacket(IQ.createResultIQ(iq));
/*
* Now that the acknowledging is out of the way, do go about our
* business with the Packet.
*/
ColibriConferenceIQ conferenceIQ = (ColibriConferenceIQ) iq;
boolean interrupted = false;
try {
processColibriConferenceIQ(conferenceIQ);
} catch (Throwable t) {
logger.error(
"An error occurred during the processing of a " + packet.getClass().getName() + " packet",
t);
if (t instanceof InterruptedException) {
/*
* We cleared the interrupted state of the current Thread by
* catching the InterruptedException. However, we do not really
* care whether the current Thread has been interrupted - we
* caught the InterruptedException because we want to swallow
* any Throwable. Consequently, we should better restore the
* interrupted state.
*/
interrupted = true;
} else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
}
if (interrupted) Thread.currentThread().interrupt();
}
/**
* Implements <tt>OperationSetVideoBridge</tt> for Jabber.
*
* @author Yana Stamcheva
* @author Lyubomir Marinov
*/
public class OperationSetVideoBridgeImpl
implements OperationSetVideoBridge,
PacketFilter,
PacketListener,
RegistrationStateChangeListener {
/**
* The <tt>Logger</tt> used by the <tt>OperationSetVideoBridgeImpl</tt> class and its instances
* for logging output.
*/
private static final Logger logger = Logger.getLogger(OperationSetVideoBridgeImpl.class);
/**
* The <tt>ProtocolProviderService</tt> implementation which initialized this instance, owns it
* and is often referred to as its parent.
*/
private final ProtocolProviderServiceJabberImpl protocolProvider;
/**
* Creates an instance of <tt>OperationSetVideoBridgeImpl</tt> by specifying the parent
* <tt>ProtocolProviderService</tt> announcing this operation set.
*
* @param protocolProvider the parent Jabber protocol provider
*/
public OperationSetVideoBridgeImpl(ProtocolProviderServiceJabberImpl protocolProvider) {
this.protocolProvider = protocolProvider;
this.protocolProvider.addRegistrationStateChangeListener(this);
}
/**
* Implements {@link PacketFilter}. Determines whether this instance is interested in a specific
* {@link Packet}. <tt>OperationSetVideoBridgeImpl</tt> returns <tt>true</tt> if the specified
* <tt>packet</tt> is a {@link ColibriConferenceIQ}; otherwise, <tt>false</tt>.
*
* @param packet the <tt>Packet</tt> to be determined whether this instance is interested in it
* @return <tt>true</tt> if the specified <tt>packet</tt> is a <tt>ColibriConferenceIQ</tt>;
* otherwise, <tt>false</tt>
*/
public boolean accept(Packet packet) {
return (packet instanceof ColibriConferenceIQ);
}
/**
* Creates a conference call with the specified callees as call peers via a video bridge provided
* by the parent Jabber provider.
*
* @param callees the list of addresses that we should call
* @return the newly created conference call containing all CallPeers
* @throws OperationFailedException if establishing the conference call fails
* @throws OperationNotSupportedException if the provider does not have any conferencing features.
*/
public Call createConfCall(String[] callees)
throws OperationFailedException, OperationNotSupportedException {
return protocolProvider
.getOperationSet(OperationSetTelephonyConferencing.class)
.createConfCall(callees, new MediaAwareCallConference(true));
}
/**
* Invites the callee represented by the specified uri to an already existing call using a video
* bridge provided by the parent Jabber provider. The difference between this method and
* createConfCall is that inviteCalleeToCall allows a user to add new peers to an already
* established conference.
*
* @param uri the callee to invite to an existing conf call.
* @param call the call that we should invite the callee to.
* @return the CallPeer object corresponding to the callee represented by the specified uri.
* @throws OperationFailedException if inviting the specified callee to the specified call fails
* @throws OperationNotSupportedException if allowing additional callees to a pre-established call
* is not supported.
*/
public CallPeer inviteCalleeToCall(String uri, Call call)
throws OperationFailedException, OperationNotSupportedException {
return protocolProvider
.getOperationSet(OperationSetTelephonyConferencing.class)
.inviteCalleeToCall(uri, call);
}
/**
* Indicates if there's an active video bridge available at this moment. The Jabber provider may
* announce support for video bridge, but it should not be used for calling until it becomes
* actually active.
*
* @return <tt>true</tt> to indicate that there's currently an active available video bridge,
* <tt>false</tt> - otherwise
*/
public boolean isActive() {
String jitsiVideobridge = protocolProvider.getJitsiVideobridge();
return ((jitsiVideobridge != null) && (jitsiVideobridge.length() > 0));
}
/**
* Notifies this instance that a specific <tt>ColibriConferenceIQ</tt> has been received.
*
* @param conferenceIQ the <tt>ColibriConferenceIQ</tt> which has been received
*/
private void processColibriConferenceIQ(ColibriConferenceIQ conferenceIQ) {
/*
* The application is not a Jitsi Videobridge server, it is a client.
* Consequently, the specified ColibriConferenceIQ is sent to it in
* relation to the part of the application's functionality which makes
* requests to a Jitsi Videobridge server i.e. CallJabberImpl.
*
* Additionally, the method processColibriConferenceIQ is presently tasked
* with processing ColibriConferenceIQ requests only. They are SET IQs
* sent by the Jitsi Videobridge server to notify the application about
* updates in the states of (colibri) conferences organized by the
* application.
*/
if (IQ.Type.SET.equals(conferenceIQ.getType()) && conferenceIQ.getID() != null) {
OperationSetBasicTelephony<?> basicTelephony =
protocolProvider.getOperationSet(OperationSetBasicTelephony.class);
if (basicTelephony != null) {
Iterator<? extends Call> i = basicTelephony.getActiveCalls();
while (i.hasNext()) {
Call call = i.next();
if (call instanceof CallJabberImpl) {
CallJabberImpl callJabberImpl = (CallJabberImpl) call;
MediaAwareCallConference conference = callJabberImpl.getConference();
if ((conference != null) && conference.isJitsiVideobridge()) {
/*
* TODO We may want to disallow rogue CallJabberImpl
* instances which may throw an exception to prevent
* the conferenceIQ from reaching the CallJabberImpl
* instance which it was meant for.
*/
if (callJabberImpl.processColibriConferenceIQ(conferenceIQ)) break;
}
}
}
}
}
}
/**
* Implements {@link PacketListener}. Notifies this instance that a specific {@link Packet} (which
* this instance has already expressed interest into by returning <tt>true</tt> from {@link
* #accept(Packet)}) has been received.
*
* @param packet the <tt>Packet</tt> which has been received and which this instance is given a
* chance to process
*/
public void processPacket(Packet packet) {
/*
* As we do elsewhere, acknowledge the receipt of the Packet first and
* then go about our business with it.
*/
IQ iq = (IQ) packet;
if (iq.getType() == IQ.Type.SET)
protocolProvider.getConnection().sendPacket(IQ.createResultIQ(iq));
/*
* Now that the acknowledging is out of the way, do go about our
* business with the Packet.
*/
ColibriConferenceIQ conferenceIQ = (ColibriConferenceIQ) iq;
boolean interrupted = false;
try {
processColibriConferenceIQ(conferenceIQ);
} catch (Throwable t) {
logger.error(
"An error occurred during the processing of a " + packet.getClass().getName() + " packet",
t);
if (t instanceof InterruptedException) {
/*
* We cleared the interrupted state of the current Thread by
* catching the InterruptedException. However, we do not really
* care whether the current Thread has been interrupted - we
* caught the InterruptedException because we want to swallow
* any Throwable. Consequently, we should better restore the
* interrupted state.
*/
interrupted = true;
} else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
}
if (interrupted) Thread.currentThread().interrupt();
}
/**
* {@inheritDoc}
*
* <p>Implements {@link RegistrationStateChangeListener}. Notifies this instance that there has
* been a change in the <tt>RegistrationState</tt> of {@link #protocolProvider}. Subscribes this
* instance to {@link ColibriConferenceIQ}s as soon as <tt>protocolProvider</tt> is registered and
* unsubscribes it as soon as <tt>protocolProvider</tt> is unregistered.
*/
public void registrationStateChanged(RegistrationStateChangeEvent ev) {
RegistrationState registrationState = ev.getNewState();
if (RegistrationState.REGISTERED.equals(registrationState)) {
protocolProvider.getConnection().addPacketListener(this, this);
} else if (RegistrationState.UNREGISTERED.equals(registrationState)) {
XMPPConnection connection = protocolProvider.getConnection();
if (connection != null) connection.removePacketListener(this);
}
}
}
