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Vert.x MQTT reactive client and server

There is a newer version: 5.0.0.CR1

/*
 * Copyright 2016 Red Hat Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.vertx.mqtt.messages;

import io.vertx.codegen.annotations.CacheReturn;
import io.vertx.codegen.annotations.GenIgnore;
import io.vertx.codegen.annotations.VertxGen;
import io.vertx.mqtt.messages.impl.MqttSubAckMessageImpl;

import java.util.List;

/**
 * Represents an MQTT SUBACK message
 */
@VertxGen
public interface MqttSubAckMessage extends MqttMessage {

  /**
   * Create a concrete instance of a Vert.x suback message
   *
   * @param messageId message identifier
   * @param grantedQosLevels  list of granted QoS levels
   * @return
   */
  @GenIgnore
  static MqttSubAckMessage create(int messageId, List grantedQosLevels) {
    return new MqttSubAckMessageImpl(messageId, grantedQosLevels);
  }

  /**
   * @return  list of granted QoS levels
   */
  @CacheReturn
  List grantedQoSLevels();
}