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; }
@SuppressWarnings("unchecked") public <C extends Channel> C getChannel(ChannelFactory<C> channelFactory, String clientId) { if (clientId == null) return null; TimeChannel<C> timeChannel = (TimeChannel<C>) channels.get(clientId); if (timeChannel == null) { // Look for existing channel id/subscriptions in distributed data (clustering). log.debug("Lookup channel %s in distributed data", clientId); try { DistributedData gdd = graniteConfig.getDistributedDataFactory().getInstance(); if (gdd != null && gdd.hasChannelId(clientId)) { log.debug("Found channel id in distributed data: %s", clientId); String channelFactoryClassName = gdd.getChannelFactoryClassName(clientId); String clientType = gdd.getChannelClientType(clientId); channelFactory = (ChannelFactory<C>) TypeUtil.newInstance( channelFactoryClassName, new Class<?>[] {Gravity.class}, new Object[] {this}); C channel = channelFactory.newChannel(clientId, clientType); timeChannel = new TimeChannel<C>(channel); if (channels.putIfAbsent(clientId, timeChannel) == null) { for (CommandMessage subscription : gdd.getSubscriptions(clientId)) { log.debug("Resubscribing channel: %s - %s", clientId, subscription); handleSubscribeMessage(channelFactory, subscription, false); } access(clientId); } } } catch (Exception e) { log.error( e, "Could not recreate channel/subscriptions from distributed data: %s", clientId); } } return (timeChannel != null ? timeChannel.getChannel() : null); }