查看本类的 API文档回源码主页

   /*
    * Copyright 2020 The Netty Project
    *
    * The Netty Project licenses this file to you 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 io.netty.handler.codec.mqtt;
  
  import io.netty.util.internal.StringUtil;
  
  /**
   * Variable Header containing Packet Id, reason code and Properties as in MQTT v5 spec.
   */
  public final class MqttPubReplyMessageVariableHeader extends MqttMessageIdVariableHeader {
  
      private final byte reasonCode;
      private final MqttProperties properties;
  
      public static final byte REASON_CODE_OK = 0;
  
      public MqttPubReplyMessageVariableHeader(int messageId, byte reasonCode, MqttProperties properties) {
          super(messageId);
          if (messageId < 1 || messageId > 0xffff) {
              throw new IllegalArgumentException("messageId: " + messageId + " (expected: 1 ~ 65535)");
          }
          this.reasonCode = reasonCode;
          this.properties = MqttProperties.withEmptyDefaults(properties);
      }
  
      public byte reasonCode() {
          return reasonCode;
      }
  
      public MqttProperties properties() {
          return properties;
      }
  
      @Override
      public String toString() {
          return StringUtil.simpleClassName(this) + "[" +
                  "messageId=" + messageId() +
                  ", reasonCode=" + reasonCode +
                  ", properties=" + properties +
                  ']';
      }
  }