content: /*
   * Copyright 2020-2023 the original author or authors.
   *
   * 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
   *
   *      https://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 com.jun.mqttx.broker.handler;
  
  import io.netty.handler.codec.mqtt.MqttMessageType;
  import org.springframework.stereotype.Component;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * mqtt 消息处理器
   *
   * @author Jun
   * @since 1.0.4
   */
  @Target(ElementType.TYPE)
  @Retention(RetentionPolicy.RUNTIME)
  @Component
  public @interface Handler {
  
      /**
       * 处理器支持的消息类别
       */
      MqttMessageType type();
  }
  