How to use

messageId

method

in

io.vertx.mqtt.messages.MqttSubAckMessage

/**
 * @return Message identifier
 */
public int messageId() { 
 if (cached_0 != null) {
  return cached_0;
 }
 int ret = delegate.messageId();
 cached_0 = ret;
 return ret;
}

/**
 * @return Message identifier
 */
public int messageId() { 
 if (cached_0 != null) {
  return cached_0;
 }
 int ret = delegate.messageId();
 cached_0 = ret;
 return ret;
}

 private void subscribe(TestContext context, MqttQoS qos) {

  this.messageId = 0;

  Async async = context.async();
  MqttClient client = MqttClient.create(Vertx.vertx());

  client.subscribeCompletionHandler(suback -> {
   assertTrue(suback.messageId() == messageId);
   assertTrue(suback.grantedQoSLevels().contains(qos.value()));
   log.info("subscribing complete for message id = " + suback.messageId() + " with QoS " + suback.grantedQoSLevels());
   client.disconnect();
   async.countDown();
  });

  client.connect(TestUtil.BROKER_PORT, TestUtil.BROKER_ADDRESS, ar -> {
   assertTrue(ar.succeeded());

   client.subscribe(MQTT_TOPIC, qos.value(), done -> {
    assertTrue(done.succeeded());
    messageId = done.result();
    log.info("subscribing on [" + MQTT_TOPIC + "] with QoS [" + qos.value() + "] message id = " + messageId);
   });
  });

  async.await();
 }
}

 private void subscribe(TestContext context, MqttQoS qos) {

  this.messageId = 0;

  Async async = context.async();
  MqttClient client = MqttClient.create(Vertx.vertx());

  client.subscribeCompletionHandler(suback -> {
   assertTrue(suback.messageId() == messageId);
   assertTrue(suback.grantedQoSLevels().contains(qos.value()));
   log.info("subscribing complete for message id = " + suback.messageId() + " with QoS " + suback.grantedQoSLevels());
   client.disconnect();
   async.countDown();
  });

  client.connect(TestUtil.BROKER_PORT, TestUtil.BROKER_ADDRESS, ar -> {
   assertTrue(ar.succeeded());

   client.subscribe(MQTT_TOPIC, qos.value(), done -> {
    assertTrue(done.succeeded());
    messageId = done.result();
    log.info("subscribing on [" + MQTT_TOPIC + "] with QoS [" + qos.value() + "] message id = " + messageId);
   });
  });

  async.await();
 }
}

assertTrue(suback.messageId() == messageId);
assertTrue(suback.grantedQoSLevels().contains(qos.value()));
log.info("subscribing complete for message id = " + suback.messageId() + " with QoS " + suback.grantedQoSLevels());

assertTrue(suback.messageId() == messageId);
assertTrue(suback.grantedQoSLevels().contains(qos.value()));
log.info("subscribing complete for message id = " + suback.messageId() + " with QoS " + suback.grantedQoSLevels());