/**
* Gets an <tt>Endpoint</tt> participating in this <tt>Conference</tt> which has a specific
* identifier/ID. If an <tt>Endpoint</tt> participating in this <tt>Conference</tt> with the
* specified <tt>id</tt> does not exist at the time the method is invoked, the method optionally
* initializes a new <tt>Endpoint</tt> instance with the specified <tt>id</tt> and adds it to the
* list of <tt>Endpoint</tt>s participating in this <tt>Conference</tt>.
*
* @param id the identifier/ID of the <tt>Endpoint</tt> which is to be returned
* @return an <tt>Endpoint</tt> participating in this <tt>Conference</tt> which has the specified
* <tt>id</tt> or <tt>null</tt> if there is no such <tt>Endpoint</tt> and <tt>create</tt>
* equals <tt>false</tt>
*/
private Endpoint getEndpoint(String id, boolean create) {
Endpoint endpoint = null;
boolean changed = false;
synchronized (endpoints) {
for (Iterator<WeakReference<Endpoint>> i = endpoints.iterator(); i.hasNext(); ) {
Endpoint e = i.next().get();
if (e == null) {
i.remove();
changed = true;
} else if (e.getID().equals(id)) {
endpoint = e;
}
}
if (create && endpoint == null) {
endpoint = new Endpoint(id, this);
// The propertyChangeListener will weakly reference this
// Conference and will unregister itself from the endpoint
// sooner or later.
endpoint.addPropertyChangeListener(propertyChangeListener);
endpoints.add(new WeakReference<>(endpoint));
changed = true;
EventAdmin eventAdmin = videobridge.getEventAdmin();
if (eventAdmin != null) eventAdmin.sendEvent(EventFactory.endpointCreated(endpoint));
}
}
if (changed) firePropertyChange(ENDPOINTS_PROPERTY_NAME, null, null);
return endpoint;
}
/**
* Notifies this instance that there was a change in the value of a property of an
* <tt>Endpoint</tt> participating in this multipoint conference.
*
* @param endpoint the <tt>Endpoint</tt> which is the source of the event/notification and is
* participating in this multipoint conference
* @param ev a <tt>PropertyChangeEvent</tt> which specifies the source of the event/notification,
* the name of the property and the old and new values of that property
*/
private void endpointPropertyChange(Endpoint endpoint, PropertyChangeEvent ev) {
String propertyName = ev.getPropertyName();
boolean maybeRemoveEndpoint;
if (Endpoint.SCTP_CONNECTION_PROPERTY_NAME.equals(propertyName)) {
// The SctpConnection of/associated with an Endpoint has changed. We
// may want to fire initial events over that SctpConnection (as soon
// as it is ready).
SctpConnection oldValue = (SctpConnection) ev.getOldValue();
SctpConnection newValue = (SctpConnection) ev.getNewValue();
endpointSctpConnectionChanged(endpoint, oldValue, newValue);
// The SctpConnection may have expired.
maybeRemoveEndpoint = (newValue == null);
} else if (Endpoint.CHANNELS_PROPERTY_NAME.equals(propertyName)) {
// An RtpChannel may have expired.
maybeRemoveEndpoint = true;
} else {
maybeRemoveEndpoint = false;
}
if (maybeRemoveEndpoint) {
// It looks like there is a chance that the Endpoint may have
// expired. Endpoints are held by this Conference via WeakReferences
// but WeakReferences are unpredictable. We have functionality
// though which could benefit from discovering that an Endpoint has
// expired as quickly as possible (e.g. ConferenceSpeechActivity).
// Consequently, try to expedite the removal of expired Endpoints.
if (endpoint.getSctpConnection() == null && endpoint.getChannelCount(null) == 0) {
removeEndpoint(endpoint);
}
}
}
/**
* Used to send a message to a subset of endpoints in the call, primary use case being a message
* that has originated from an endpoint (as opposed to a message originating from the bridge and
* being sent to all endpoints in the call, for that see broadcastMessageOnDataChannels below
*
* @param msg
* @param endpoints
*/
public void sendMessageOnDataChannels(String msg, List<Endpoint> endpoints) {
for (Endpoint endpoint : endpoints) {
try {
endpoint.sendMessageOnDataChannel(msg);
} catch (IOException e) {
logger.error("Failed to send message on data channel.", e);
}
}
}
/**
* Sends a POST request with a file and returns the response.
*
* @param endpoint The endpoint to send the request to.
* @param file The file to upload
* @param responseClass The class to deserialise the Json response to. Can be null if no response
* message is expected.
* @param <T> The type to deserialise the response to.
* @return A {@link Response} containing the deserialised body, if any.
* @throws IOException If an error occurs.
* @see MultipartEntityBuilder
*/
private <T> Response<T> post(Endpoint endpoint, File file, Class<T> responseClass)
throws IOException {
if (file == null) {
return post(endpoint, responseClass);
} // deal with null case
// Create the request
HttpPost post = new HttpPost(endpoint.url());
post.setHeaders(combineHeaders());
// Add fields as text pairs
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
// Add file as binary
FileBody fileBody = new FileBody(file);
multipartEntityBuilder.addPart("file", fileBody);
// Set the body
post.setEntity(multipartEntityBuilder.build());
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(post)) {
if (String.class.isAssignableFrom(responseClass)) {
String body = getResponseString(response);
return new Response(response.getStatusLine(), body);
} else {
T body = deserialiseResponseMessage(response, responseClass);
return new Response<>(response.getStatusLine(), body);
}
}
}
/**
* Sends a POST request with a file and returns the response.
*
* @param endpoint The endpoint to send the request to.
* @param file The file to upload
* @param responseClass The class to deserialise the Json response to. Can be null if no response
* message is expected.
* @param fields Any name-value pairs to serialise
* @param <T> The type to deserialise the response to.
* @return A {@link Response} containing the deserialised body, if any.
* @throws IOException If an error occurs.
* @see MultipartEntityBuilder
*/
public <T> Response<T> post(
Endpoint endpoint, File file, Class<T> responseClass, NameValuePair... fields)
throws IOException {
if (file == null) {
return post(endpoint, responseClass, fields);
} // deal with null case
// Create the request
HttpPost post = new HttpPost(endpoint.url());
post.setHeaders(combineHeaders());
// Add fields as text pairs
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
for (NameValuePair field : fields) {
multipartEntityBuilder.addTextBody(field.getName(), field.getValue());
}
// Add file as binary
FileBody bin = new FileBody(file);
multipartEntityBuilder.addPart("file", bin);
// Set the body
post.setEntity(multipartEntityBuilder.build());
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(post)) {
T body = deserialiseResponseMessage(response, responseClass);
return new Response<>(response.getStatusLine(), body);
}
}
/**
* Sends a GET request and returns the response.
*
* @param endpoint The endpoint to send the request to.
* @param headers Any additional headers to send with this request. You can use {@link
* org.apache.http.HttpHeaders} constants for header names.
* @return A {@link Path} to the downloaded content, if any.
* @throws IOException If an error occurs.
* @see java.nio.file.Files#probeContentType(Path)
*/
public Response<Path> get(Endpoint endpoint, NameValuePair... headers) throws IOException {
// Create the request
HttpGet get = new HttpGet(endpoint.url());
get.setHeaders(combineHeaders(headers));
Path tempFile = null;
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(get)) {
if (response.getStatusLine().getStatusCode() != HttpStatus.OK_200) {
return null;
} // If bad response return null
// Request the content
HttpEntity entity = response.getEntity();
// Download the content to a temporary file
if (entity != null) {
tempFile = Files.createTempFile("download", "file");
try (InputStream input = entity.getContent();
OutputStream output = Files.newOutputStream(tempFile)) {
IOUtils.copy(input, output);
}
}
return new Response<>(response.getStatusLine(), tempFile);
}
}
public void testEntity() throws Exception {
int port = PortAllocator.getFreePort();
String address = "http://localhost:" + port + "/entity";
Endpoint endpoint = Endpoint.create(new MyEndpoint());
endpoint.publish(address);
try {
HTTPResponseInfo rInfo = sendEntity(address);
String resp = rInfo.getResponseBody();
if (resp.contains("x1y1")) {
fail("Entity is getting resolved");
}
int code = rInfo.getResponseCode();
assertEquals(HttpURLConnection.HTTP_INTERNAL_ERROR, code);
} finally {
endpoint.stop();
}
}
public boolean equals(Object obj) {
if (obj != null && obj instanceof LiveRef) {
LiveRef ref = (LiveRef) obj;
return (ep.equals(ref.ep) && id.equals(ref.id) && isLocal == ref.isLocal);
} else {
return false;
}
}
/**
* Notifies this instance that {@link #speechActivity} has identified a speaker switch event in
* this multipoint conference and there is now a new dominant speaker.
*/
private void dominantSpeakerChanged() {
Endpoint dominantSpeaker = speechActivity.getDominantEndpoint();
if (logger.isTraceEnabled()) {
logger.trace(
"The dominant speaker in conference "
+ getID()
+ " is now the endpoint "
+ ((dominantSpeaker == null) ? "(null)" : dominantSpeaker.getID())
+ ".");
}
if (dominantSpeaker != null) {
broadcastMessageOnDataChannels(createDominantSpeakerEndpointChangeEvent(dominantSpeaker));
if (isRecording() && (recorderEventHandler != null))
recorderEventHandler.dominantSpeakerChanged(dominantSpeaker);
}
}
/**
* Initializes a new <tt>SctpConnection</tt> instance.
*
* @param id the string identifier of this connection instance
* @param content the <tt>Content</tt> which is initializing the new instance
* @param endpoint the <tt>Endpoint</tt> of newly created instance
* @param remoteSctpPort the SCTP port used by remote peer
* @param channelBundleId the ID of the channel-bundle this <tt>SctpConnection</tt> is to be a
* part of (or <tt>null</tt> if no it is not to be a part of a channel-bundle).
* @throws Exception if an error occurs while initializing the new instance
*/
public SctpConnection(
String id, Content content, Endpoint endpoint, int remoteSctpPort, String channelBundleId)
throws Exception {
super(content, id, channelBundleId);
setEndpoint(endpoint.getID());
this.remoteSctpPort = remoteSctpPort;
this.debugId = generateDebugId();
}
/**
* Notifies this instance that a specific <tt>SctpConnection</tt> has become ready i.e. connected
* to a/the remote peer and operational.
*
* @param sctpConnection the <tt>SctpConnection</tt> which has become ready and is the cause of
* the method invocation
*/
private void sctpConnectionReady(SctpConnection sctpConnection) {
/*
* We want to fire initial events over the SctpConnection as soon as it
* is ready, we do not want to fire them multiple times i.e. every time
* the SctpConnection becomes ready.
*/
sctpConnection.removeChannelListener(webRtcDataStreamListener);
if (!isExpired() && !sctpConnection.isExpired() && sctpConnection.isReady()) {
Endpoint endpoint = sctpConnection.getEndpoint();
if (endpoint != null) endpoint = getEndpoint(endpoint.getID());
if (endpoint != null) {
/*
* It appears that this Conference, the SctpConnection and the
* Endpoint are in states which allow them to fire the initial
* events.
*/
Endpoint dominantSpeaker = speechActivity.getDominantEndpoint();
if (dominantSpeaker != null) {
try {
endpoint.sendMessageOnDataChannel(
createDominantSpeakerEndpointChangeEvent(dominantSpeaker));
} catch (IOException e) {
logger.error("Failed to send message on data channel.", e);
}
}
/*
* Determining the instant at which an SctpConnection associated
* with an Endpoint becomes ready (i.e. connected to the remote
* peer and operational) is a multi-step ordeal. The Conference
* class implements the procedure so do not make other classes
* implement it as well.
*/
endpoint.sctpConnectionReady(sctpConnection);
}
}
}
/**
* Sends a POST request and returns the response.
*
* @param endpoint The endpoint to send the request to.
* @param responseClass The class to deserialise the Json response to. Can be null if no response
* message is expected.
* @param headers Any additional headers to send with this request. You can use {@link
* org.apache.http.HttpHeaders} constants for header names.
* @param <T> The type to deserialise the response to.
* @return A {@link Response} containing the deserialised body, if any.
* @throws IOException If an error occurs.
*/
public <T> Response<T> delete(Endpoint endpoint, Class<T> responseClass, NameValuePair... headers)
throws IOException {
// Create the request
HttpDelete delete = new HttpDelete(endpoint.url());
delete.setHeaders(combineHeaders(headers));
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(delete)) {
T body = deserialiseResponseMessage(response, responseClass);
return new Response<>(response.getStatusLine(), body);
}
}
/**
* Sends a GET request and returns the response.
*
* @param endpoint The endpoint to send the request to.
* @param responseClass The class to deserialise the Json response to. Can be null if no response
* message is expected.
* @param headers Any additional headers to send with this request. You can use {@link
* org.apache.http.HttpHeaders} constants for header names.
* @param <T> The type to deserialise the response to.
* @return A {@link Response} containing the deserialised body, if any.
* @throws IOException If an error occurs.
*/
public <T> Response<T> get(Endpoint endpoint, Class<T> responseClass, NameValuePair... headers)
throws IOException {
// Create the request
HttpGet get = new HttpGet(endpoint.url());
get.setHeaders(combineHeaders(headers));
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(get)) {
// System.out.println(response);
T body = deserialiseResponseMessage(response, responseClass);
return new Response<>(response.getStatusLine(), body);
}
}
/**
* Updates an <tt>Endpoint</tt> of this <tt>Conference</tt> with the information contained in
* <tt>colibriEndpoint</tt>. The ID of <tt>colibriEndpoint</tt> is used to select the
* <tt>Endpoint</tt> to update.
*
* @param colibriEndpoint a <tt>ColibriConferenceIQ.Endpoint</tt> instance that contains
* information to be set on an <tt>Endpoint</tt> instance of this <tt>Conference</tt>.
*/
void updateEndpoint(ColibriConferenceIQ.Endpoint colibriEndpoint) {
String id = colibriEndpoint.getId();
if (id != null) {
Endpoint endpoint = getEndpoint(id);
if (endpoint != null) {
String oldDisplayName = endpoint.getDisplayName();
String newDisplayName = colibriEndpoint.getDisplayName();
if ((oldDisplayName == null && newDisplayName != null)
|| (oldDisplayName != null && !oldDisplayName.equals(newDisplayName))) {
endpoint.setDisplayName(newDisplayName);
if (isRecording() && endpointRecorder != null) endpointRecorder.updateEndpoint(endpoint);
EventAdmin eventAdmin = getVideobridge().getEventAdmin();
if (eventAdmin != null) {
eventAdmin.sendEvent(EventFactory.endpointDisplayNameChanged(endpoint));
}
}
}
}
}
/**
* Sends a POST request and returns the response.
*
* <p>Specifically for the use case where we have no requestMessage
*
* @param endpoint The endpoint to send the request to.
* @param responseClass The class to deserialise the Json response to. Can be null if no response
* message is expected.
* @param headers Any additional headers to send with this request. You can use {@link
* org.apache.http.HttpHeaders} constants for header names.
* @param <T> The type to deserialise the response to.
* @return A {@link Response} containing the deserialised body, if any.
* @throws IOException If an error occurs.
*/
public <T> Response<T> post(Endpoint endpoint, Class<T> responseClass, NameValuePair... headers)
throws IOException {
// Create the request
HttpPost post = new HttpPost(endpoint.url());
post.setHeaders(combineHeaders(headers));
// Add the request message if there is one
post.setEntity(serialiseRequestMessage(null));
// Send the request and process the response
try (CloseableHttpResponse response = httpClient().execute(post)) {
T body = deserialiseResponseMessage(response, responseClass);
return new Response<>(response.getStatusLine(), body);
}
}
/**
* Removes a specific <tt>Endpoint</tt> instance from this list of <tt>Endpoint</tt>s
* participating in this multipoint conference.
*
* @param endpoint the <tt>Endpoint</tt> to remove
* @return <tt>true</tt> if the list of <tt>Endpoint</tt>s participating in this multipoint
* conference changed as a result of the execution of the method; otherwise, <tt>false</tt>
*/
private boolean removeEndpoint(Endpoint endpoint) {
boolean removed = false;
synchronized (endpoints) {
for (Iterator<WeakReference<Endpoint>> i = endpoints.iterator(); i.hasNext(); ) {
Endpoint e = i.next().get();
if (e == null || e == endpoint) {
i.remove();
removed = true;
}
}
if (endpoint != null) {
endpoint.expire();
}
}
if (removed) firePropertyChange(ENDPOINTS_PROPERTY_NAME, null, null);
return removed;
}
/** {@inheritDoc} */
@Override
protected void onEndpointChanged(Endpoint oldValue, Endpoint newValue) {
if (oldValue != null) oldValue.setSctpConnection(null);
if (newValue != null) newValue.setSctpConnection(this);
}
/** Export the object to accept incoming calls. */
public void exportObject(Target target) throws RemoteException {
ep.exportObject(target);
}
/**
* Initializes a new <tt>String</tt> to be sent over an <tt>SctpConnection</tt> in order to notify
* an <tt>Endpoint</tt> that the dominant speaker in this multipoint conference has changed to a
* specific <tt>Endpoint</tt>.
*
* @param dominantSpeaker the dominant speaker in this multipoint conference
* @return a new <tt>String</tt> to be sent over an <tt>SctpConnection</tt> in order to notify an
* <tt>Endpoint</tt> that the dominant speaker in this multipoint conference has changed to
* <tt>dominantSpeaker</tt>
*/
private String createDominantSpeakerEndpointChangeEvent(Endpoint dominantSpeaker) {
return "{\"colibriClass\":\"DominantSpeakerEndpointChangeEvent\","
+ "\"dominantSpeakerEndpoint\":\""
+ JSONValue.escape(dominantSpeaker.getID())
+ "\"}";
}
public Channel getChannel() throws RemoteException {
if (ch == null) {
ch = ep.getChannel();
}
return ch;
}
/**
* Maybe send a data channel command to he associated simulcast sender to make it stop streaming
* its hq stream, if it's not being watched by any participant.
*/
public void maybeSendStopHighQualityStreamCommand() {
if (nativeSimulcast || !hasLayers()) {
// In native simulcast the client adjusts its layers autonomously so
// we don't need (nor we can) to control it with data channel
// messages.
return;
}
Endpoint oldEndpoint = getSimulcastEngine().getVideoChannel().getEndpoint();
SimulcastLayer[] oldSimulcastLayers = getSimulcastLayers();
SctpConnection sctpConnection;
if (oldSimulcastLayers != null
&& oldSimulcastLayers.length > 1
/* oldEndpoint != null is implied*/
&& (sctpConnection = oldEndpoint.getSctpConnection()) != null
&& sctpConnection.isReady()
&& !sctpConnection.isExpired()) {
// we have an old endpoint and it has an SCTP connection that is
// ready and not expired. if nobody else is watching the old
// endpoint, stop its hq stream.
boolean stopHighQualityStream = true;
for (Endpoint e :
getSimulcastEngine().getVideoChannel().getContent().getConference().getEndpoints()) {
// TODO(gp) need some synchronization here. What if the selected
// endpoint changes while we're in the loop?
if (oldEndpoint != e && (oldEndpoint == e.getEffectivelySelectedEndpoint())
|| e.getEffectivelySelectedEndpoint() == null) {
// somebody is watching the old endpoint or somebody has not
// yet signaled its selected endpoint to the bridge, don't
// stop the hq stream.
stopHighQualityStream = false;
break;
}
}
if (stopHighQualityStream) {
// TODO(gp) this assumes only a single hq stream.
logDebug(
getSimulcastEngine().getVideoChannel().getEndpoint().getID()
+ " notifies "
+ oldEndpoint.getID()
+ " to stop "
+ "its HQ stream.");
SimulcastLayer hqLayer = oldSimulcastLayers[oldSimulcastLayers.length - 1];
StopSimulcastLayerCommand command = new StopSimulcastLayerCommand(hqLayer);
String json = mapper.toJson(command);
try {
oldEndpoint.sendMessageOnDataChannel(json);
} catch (IOException e1) {
logError(oldEndpoint.getID() + " failed to send " + "message on data channel.", e1);
}
}
}
}
/**
* Maybe send a data channel command to the associated <tt>Endpoint</tt> to make it start
* streaming its hq stream, if it's being watched by some receiver.
*/
public void maybeSendStartHighQualityStreamCommand() {
if (nativeSimulcast || !hasLayers()) {
// In native simulcast the client adjusts its layers autonomously so
// we don't need (nor we can) to control it with data channel
// messages.
return;
}
Endpoint newEndpoint = getSimulcastEngine().getVideoChannel().getEndpoint();
SimulcastLayer[] newSimulcastLayers = getSimulcastLayers();
SctpConnection sctpConnection;
if (newSimulcastLayers == null
|| newSimulcastLayers.length <= 1
/* newEndpoint != null is implied */
|| (sctpConnection = newEndpoint.getSctpConnection()) == null
|| !sctpConnection.isReady()
|| sctpConnection.isExpired()) {
return;
}
// we have a new endpoint and it has an SCTP connection that is
// ready and not expired. if somebody else is watching the new
// endpoint, start its hq stream.
boolean startHighQualityStream = false;
for (Endpoint e :
getSimulcastEngine().getVideoChannel().getContent().getConference().getEndpoints()) {
// TODO(gp) need some synchronization here. What if the
// selected endpoint changes while we're in the loop?
if (e == newEndpoint) continue;
Endpoint eSelectedEndpoint = e.getEffectivelySelectedEndpoint();
if (newEndpoint == eSelectedEndpoint) {
// somebody is watching the new endpoint or somebody has not
// yet signaled its selected endpoint to the bridge, start
// the hq stream.
if (logger.isDebugEnabled()) {
Map<String, Object> map = new HashMap<String, Object>(3);
map.put("e", e);
map.put("newEndpoint", newEndpoint);
map.put("maybe", eSelectedEndpoint == null ? "(maybe) " : "");
StringCompiler sc =
new StringCompiler(map).c("{e.id} is {maybe} watching {newEndpoint.id}.");
logDebug(sc.toString().replaceAll("\\s+", " "));
}
startHighQualityStream = true;
break;
}
}
if (startHighQualityStream) {
// TODO(gp) this assumes only a single hq stream.
logDebug(
getSimulcastEngine().getVideoChannel().getEndpoint().getID()
+ " notifies "
+ newEndpoint.getID()
+ " to start its HQ stream.");
SimulcastLayer hqLayer = newSimulcastLayers[newSimulcastLayers.length - 1];
;
StartSimulcastLayerCommand command = new StartSimulcastLayerCommand(hqLayer);
String json = mapper.toJson(command);
try {
newEndpoint.sendMessageOnDataChannel(json);
} catch (IOException e) {
logError(newEndpoint.getID() + " failed to send message on data channel.", e);
}
}
}
