/** Start the thread that periodically updates the metadata. */
public void startUpdating() {
if (update == true) {
return;
}
final Sink metadataSink = new Sink();
try {
metadataSink.OpenRBNBConnection(rbnbController.getRBNBConnectionString(), rbnbSinkName);
} catch (SAPIException e) {
log.error("Failed to connect to RBNB server: " + e.getMessage());
e.printStackTrace();
return;
}
updateMetadata(metadataSink);
updateThread =
new Thread("MetadataManager") {
public void run() {
log.info("RBNB Metadata thread is starting.");
updateMetadataThread(metadataSink);
metadataSink.CloseRBNBConnection();
channels.clear();
ctree = null;
log.info("RBNB Metadata thread is stopping.");
}
};
update = true;
updateThread.start();
}
/**
* Updates the metadata and posts it to listeners. It also notifies all threads waiting on this
* object.
*
* @param metadataSink the RBNB sink to use for the server connection
*/
private synchronized void updateMetadata(Sink metadataSink) {
// log.info("Updating channel listing at " + DataViewer.formatDate(System.currentTimeMillis
// ()));
Map<String, Channel> newChannels = new HashMap<String, Channel>();
ChannelTree channelTree;
try {
// create metadata channel tree
channelTree = getChannelTree(metadataSink, newChannels);
} catch (SAPIException e) {
log.error("Failed to update metadata: " + e.getMessage() + ".");
if (!metadataSink.VerifyConnection()) {
log.error(
"Metadata RBNB connection is severed, try to reconnect to "
+ rbnbController.getRBNBConnectionString()
+ ".");
metadataSink.CloseRBNBConnection();
try {
metadataSink.OpenRBNBConnection(rbnbController.getRBNBConnectionString(), "RDVMetadata");
} catch (SAPIException error) {
log.error("Failed to connect to RBNB server: " + error.getMessage());
error.printStackTrace();
}
}
return;
}
if (LocalChannelManager.getInstance().hasChannels()) {
ChannelTree localChannelTree = getLocalChannelTree(newChannels, channelTree);
ctree = localChannelTree.merge(channelTree);
} else {
ctree = channelTree;
}
channels = newChannels;
// notify metadata listeners
fireMetadataUpdated(ctree);
}
