Examples with Listener org.fusesource.mqtt.client.Listener used on opensource projects

Example 1 with Listener

use of org.fusesource.mqtt.client.Listener in project camel by apache.

the class MQTTEndpoint method createConnection.

protected void createConnection() {
    connection = configuration.callbackConnection();
    connection.listener(new Listener() {

        public void onConnected() {
            connected = true;
            LOG.info("MQTT Connection connected to {}", configuration.getHost());
        }

        public void onDisconnected() {
            // no connected = false required here because the MQTT client should trigger its own reconnect;
            // setting connected = false would make the publish() method to launch a new connection while the original
            // one is still reconnecting, likely leading to duplicate messages as observed in CAMEL-9092;
            // if retries are exhausted and it desists, we should get a callback on onFailure, and then we can set
            // connected = false safely
            LOG.debug("MQTT Connection disconnected from {}", configuration.getHost());
        }

        public void onPublish(UTF8Buffer topic, Buffer body, Runnable ack) {
            if (!consumers.isEmpty()) {
                Exchange exchange = createExchange();
                exchange.getIn().setBody(body.toByteArray());
                exchange.getIn().setHeader(MQTTConfiguration.MQTT_SUBSCRIBE_TOPIC, topic.toString());
                for (MQTTConsumer consumer : consumers) {
                    consumer.processExchange(exchange);
                }
            }
            if (ack != null) {
                ack.run();
            }
        }

        public void onFailure(Throwable value) {
            // mark this connection as disconnected so we force re-connect
            connected = false;
            LOG.warn("Connection to " + configuration.getHost() + " failure due " + value.getMessage() + ". Forcing a disconnect to re-connect on next attempt.");
            connection.disconnect(new Callback<Void>() {

                public void onSuccess(Void value) {
                }

                public void onFailure(Throwable e) {
                    LOG.debug("Failed to disconnect from " + configuration.getHost() + ". This exception is ignored.", e);
                }
            });
        }
    });
}