How to use

Topic

in

org.springframework.data.redis.listener

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Adding listener '" + listener + "' on channel '" + topic.getTopic() + "'");
    logger.trace("Adding listener '" + listener + "' for pattern '" + topic.getTopic() + "'");

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Removing " + msg + " from channel '" + topic.getTopic() + "'");
    logger.trace("Removing " + msg + " from pattern '" + topic.getTopic() + "'");

private String buildPattern(final Topic topic) {
 if (topic instanceof ChannelTopic) {
  return topic.getTopic();
 } else {
  // Convert topic pattern in a valid regular expression, i.e., replace the last * character
  // with .*
  return topic.getTopic().replaceAll("\\*", ".*");
 }
}

public void removeSubscription(final Topic topic) {
 if (subscriptions.containsKey(topic.getTopic())) {
  subscriptions.remove(topic.getTopic());
 }
}

public void addSubscription(final Topic topic, final NotificationParams params) {
 // If listener is already subscribe to topic, override its notification params
 subscriptions.put(topic.getTopic(), params);
}

private boolean unsubscribeMonitor() {
 boolean unsubscriptionDone = true;
 try {
  LOGGER.debug("Removing subscription from topic {}", monitorTopic.getTopic());
  listenerContainer.removeMessageListener(monitorListener, monitorTopic);
 } catch (final RedisInvalidSubscriptionException rise) {
  LOGGER.error("An error occurred while unsubscribing from topic {}", monitorTopic.getTopic(), rise);
  unsubscriptionDone = false;
 }
 return unsubscriptionDone;
}

private boolean subscribeMonitor() {
 boolean subscriptionDone = true;
 try {
  LOGGER.debug("Adding subscription to topic {}", monitorTopic.getTopic());
  listenerContainer.addMessageListener(monitorListener, monitorTopic);
 } catch (final RedisInvalidSubscriptionException rise) {
  LOGGER.error("An error occurred while subscribing to topic {}", monitorTopic.getTopic(), rise);
  subscriptionDone = false;
 }
 return subscriptionDone;
}

public void publishPing() {
 redisTemplate.convertAndSend(monitorTopic.getTopic(), "PING SUBSCRIPTION");
 lock.lock();
 try {
  countPendingEvents++;
 } finally {
  lock.unlock();
 }
}

private void removeSubscription(final Subscription subscription) {
 final Topic topic = ChannelUtils.getChannel(subscription);
 LOGGER.debug("Removing subscription to channel {} for listener {} ", topic.getTopic(), subscription.getSourceEntityId());
 final MessageListenerImpl listener = listeners.get(subscription.getSourceEntityId());
 if (listener != null) {
  listenerContainer.removeMessageListener(listener, topic);
  listener.removeSubscription(topic);
 }
 // Finally, the subscription to the topic is removed from Redis
 jedisTemplate.hDel(keysBuilder.getSubscriptionKey(subscription.getSourceEntityId()), topic.getTopic());
 LOGGER.debug("Removed subscription from listener {} to channel {}", subscription.getSourceEntityId(), topic.getTopic());
}

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Adding listener '" + listener + "' on channel '" + topic.getTopic() + "'");
    logger.trace("Adding listener '" + listener + "' for pattern '" + topic.getTopic() + "'");

private void activateSubscription(final String listenerName, final Topic topic, final NotificationParams notificationParams) {
 MessageListenerImpl listener = listeners.get(listenerName);
 if (listener == null) {
  listener = addNewListener(listenerName);
 }
 LOGGER.info("Subscribing listener {} to channel {}", listener.getName(), topic.getTopic());
 listenerContainer.addMessageListener(listener, topic);
 listener.addSubscription(topic, notificationParams);
}

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Adding listener '" + listener + "' on channel '" + topic.getTopic() + "'");
    logger.trace("Adding listener '" + listener + "' for pattern '" + topic.getTopic() + "'");

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Adding listener '" + listener + "' on channel '" + topic.getTopic() + "'");
    logger.trace("Adding listener '" + listener + "' for pattern '" + topic.getTopic() + "'");

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Removing " + msg + " from channel '" + topic.getTopic() + "'");
    logger.trace("Removing " + msg + " from pattern '" + topic.getTopic() + "'");

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Removing " + msg + " from channel '" + topic.getTopic() + "'");
    logger.trace("Removing " + msg + " from pattern '" + topic.getTopic() + "'");

ByteArrayWrapper holder = new ByteArrayWrapper(serializer.serialize(topic.getTopic()));
    logger.trace("Removing " + msg + " from channel '" + topic.getTopic() + "'");
    logger.trace("Removing " + msg + " from pattern '" + topic.getTopic() + "'");

private void publish(final AlarmInputMessage message) {
 LOGGER.debug("Publish alarm event message [{}] associated with alert [{}]", message.getMessage(), message.getAlertId());
 final Topic topic = ChannelUtils.buildTopic(PubSubChannelPrefix.alarm, message.getAlertId());
 jedisTemplate.publish(topic.getTopic(), PublishMessageUtils.buildContentToPublish(message, topic));
}

 private void publish(final OrderInputMessage message) {
  LOGGER.debug("Publish order event [{}] related to provider [{}] and sensor [{}]", message.getOrder(), message.getProviderId(),
    message.getSensorId());
  final Topic topic = ChannelUtils.buildTopic(PubSubChannelPrefix.order, message.getProviderId(), message.getSensorId());
  jedisTemplate.publish(topic.getTopic(), PublishMessageUtils.buildContentToPublish(message, topic));
  LOGGER.debug("Order published");
 }
}

private void publishSensorData(final Observation data) {
 final Topic topic = ChannelUtils.buildTopic(PubSubChannelPrefix.data, data.getProvider(), data.getSensor());
 jedisTemplate.publish(topic.getTopic(), PublishMessageUtils.buildContentToPublish(data, topic));
}

@Override
public void subscribe(final Subscription subscription) {
 // The first step is to validate that the resource to which the subscription refers exists in
 // Sentilo. Otherwise an error is thrown
 checkTargetResourceState(subscription);
 // Al subscribirse, no sólo se debe habilitar el listener correspondiente, sino que tb se debe
 // persistir en Redis la subscripcion para la entidad de turno. De esta manera se podrán
 // iniciar los listeners asociados a las subscripciones ya existentes cuando se arranque
 // este modulo.
 // Estos registros en Redis serán del tipo Hash y habrá uno para cada entidad.
 // Es decir, para cada entidad que este subscrita a algun canal tendremos en Redis
 // una Hash con key igual a subs:<entityId> y N entradas <field, value> donde:
 // - field: cada campo de la hash corresponderá a una subscripcion , por lo que el nombre del
 // campo identificará el canal al cual se está subscrito <event_type>/element_id, donde
 // element_id es el identificador del recurso al cual se esta subscrito.
 // - value: el value del campo contiene la informacion necesaria para realizar la notificacion
 // via HTTP Callback (estos datos son el endpoint, la secretKey a utilizar, politica de
 // reintentos, ...)
 final Topic topic = ChannelUtils.getChannel(subscription);
 // Habilitamos listener
 activateSubscription(subscription.getSourceEntityId(), topic, subscription.getNotificationParams());
 // Persistimos en Redis la subscripcion
 jedisTemplate.hSet(keysBuilder.getSubscriptionKey(subscription.getSourceEntityId()), topic.getTopic(),
   converter.marshal(subscription.getNotificationParams()));
 LOGGER.info("Listener {} subscribed to channel {}", subscription.getSourceEntityId(), topic.getTopic());
}