io.netty.handler.codec.mqtt.MqttMessageType # PUBREC 源码实例Demo

/**
 * Sends PUBREC packet to server
 *
 * @param publishMessage a PUBLISH message to acknowledge
 */
private void publishReceived(MqttPublishMessage publishMessage) {

  MqttFixedHeader fixedHeader =
    new MqttFixedHeader(MqttMessageType.PUBREC, false, AT_MOST_ONCE, false, 0);

  MqttMessageIdVariableHeader variableHeader =
    MqttMessageIdVariableHeader.from(publishMessage.messageId());

  io.netty.handler.codec.mqtt.MqttMessage pubrec = MqttMessageFactory.newMessage(fixedHeader, variableHeader, null);

  synchronized (this) {
    qos2inbound.put(publishMessage.messageId(), publishMessage);
  }
  this.write(pubrec);
}
 

public static MqttMessage pubrec(int messageId) {
	MqttFixedHeader fixedHeader = new MqttFixedHeader(MqttMessageType.PUBREC, false, MqttQoS.AT_MOST_ONCE, false,
			2);
	MqttMessageIdVariableHeader variableHeader = MqttMessageIdVariableHeader.from(messageId);

	return new MqttMessage(fixedHeader, variableHeader);
}
 

public static MqttMessage getPubRecMessage(int messageId){
    MqttFixedHeader fixedHeader = new MqttFixedHeader(MqttMessageType.PUBREC,false,MqttQoS.AT_MOST_ONCE,false,0);
    MqttMessage mqttMessage = new MqttMessage(fixedHeader,MqttMessageIdVariableHeader.from(messageId));
    return mqttMessage;
}
 

@Override
public MqttMessageType type() {
    return MqttMessageType.PUBREC;
}
 

public MqttEndpointImpl publishReceived(int publishMessageId) {

    MqttFixedHeader fixedHeader =
      new MqttFixedHeader(MqttMessageType.PUBREC, false, MqttQoS.AT_MOST_ONCE, false, 0);
    MqttMessageIdVariableHeader variableHeader =
      MqttMessageIdVariableHeader.from(publishMessageId);

    io.netty.handler.codec.mqtt.MqttMessage pubrec = MqttMessageFactory.newMessage(fixedHeader, variableHeader, null);

    this.write(pubrec);

    return this;
  }