public Channel removeChannel(String channelId, boolean timeout) {
if (channelId == null) return null;
// Remove existing channel id/subscriptions in distributed data (clustering).
try {
DistributedData gdd = graniteConfig.getDistributedDataFactory().getInstance();
if (gdd != null) {
log.debug("Removing channel id from distributed data: %s", channelId);
gdd.removeChannelId(channelId);
}
} catch (Exception e) {
log.error(e, "Could not remove channel id from distributed data: %s", channelId);
}
TimeChannel<?> timeChannel = channels.get(channelId);
Channel channel = null;
if (timeChannel != null) {
try {
if (timeChannel.getTimerTask() != null) timeChannel.getTimerTask().cancel();
} catch (Exception e) {
// Should never happen...
}
channel = timeChannel.getChannel();
try {
for (Subscription subscription : channel.getSubscriptions()) {
try {
Message message = subscription.getUnsubscribeMessage();
handleMessage(channel.getFactory(), message, true);
} catch (Exception e) {
log.error(
e,
"Error while unsubscribing channel: %s from subscription: %s",
channel,
subscription);
}
}
} finally {
channels.remove(channelId);
channel.destroy(timeout);
}
}
return channel;
}
public boolean access(String channelId) {
if (channelId != null) {
TimeChannel<?> timeChannel = channels.get(channelId);
if (timeChannel != null) {
synchronized (timeChannel) {
TimerTask timerTask = timeChannel.getTimerTask();
if (timerTask != null) {
log.debug("Canceling TimerTask: %s", timerTask);
timerTask.cancel();
timeChannel.setTimerTask(null);
}
timerTask = new ChannelTimerTask(this, channelId);
timeChannel.setTimerTask(timerTask);
long timeout = gravityConfig.getChannelIdleTimeoutMillis();
log.debug("Scheduling TimerTask: %s for %s ms.", timerTask, timeout);
channelsTimer.schedule(timerTask, timeout);
return true;
}
}
}
return false;
}