tech.smartboot.mqtt.common.message

类 MqttFixedHeader

java.lang.Object

tech.smartboot.mqtt.common.ToString

tech.smartboot.mqtt.common.message.MqttFixedHeader

public class MqttFixedHeader
extends ToString

固定报头，每个 MQTT 控制报文都包含一个固定报头。 报头格式:

  _________________________________________
  |  Bit  | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
  |---------------------------------------|
  | byte1 |  报文类型  | 指定报文类型的标志位  |
  |---------------------------------------|
  | byte2 |           剩余长度              |
  |---------------------------------------|
  

版本:

V1.0 , 2018/4/22

作者:

三刀

字段概要

字段

限定符和类型	字段和说明
static MqttFixedHeader	CONN_ACK_HEADER
static MqttFixedHeader	CONNECT_HEADER
static MqttFixedHeader	DISCONNECT_HEADER
static MqttFixedHeader	PING_REQ_HEADER
static MqttFixedHeader	PING_RESP_HEADER
static MqttFixedHeader	PUB_ACK_HEADER
static MqttFixedHeader	PUB_COMP_HEADER
static MqttFixedHeader	PUB_FAILURE_HEADER
static MqttFixedHeader	PUB_QOS0_HEADER
static MqttFixedHeader	PUB_QOS1_HEADER
static MqttFixedHeader	PUB_QOS2_HEADER
static MqttFixedHeader	PUB_REC_HEADER
static MqttFixedHeader	PUB_REL_HEADER
static MqttFixedHeader	PUB_REL_HEADER_DUP
static MqttFixedHeader	PUB_RETAIN_QOS0_HEADER
static MqttFixedHeader	PUB_RETAIN_QOS1_HEADER
static MqttFixedHeader	PUB_RETAIN_QOS2_HEADER
static MqttFixedHeader	SUB_ACK_HEADER
static MqttFixedHeader	SUBSCRIBE_HEADER
static MqttFixedHeader	SUBSCRIBE_HEADER_DUP
static MqttFixedHeader	UNSUB_ACK_HEADER
static MqttFixedHeader	UNSUBSCRIBE_HEADER
static MqttFixedHeader	UNSUBSCRIBE_HEADER_DUP

方法概要

限定符和类型	方法和说明
static MqttFixedHeader	getInstance(MqttMessageType messageType, boolean dup, int qosLevel, boolean retain)
MqttMessageType	getMessageType()
MqttQoS	getQosLevel()
boolean	isDup()
boolean	isRetain()
void	writeTo(MqttWriter mqttWriter)

从类继承的方法 tech.smartboot.mqtt.common.ToString

toString

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

字段详细资料

CONNECT_HEADER

public static final MqttFixedHeader CONNECT_HEADER

CONN_ACK_HEADER

public static final MqttFixedHeader CONN_ACK_HEADER

PUB_ACK_HEADER

public static final MqttFixedHeader PUB_ACK_HEADER

PUB_REC_HEADER

public static final MqttFixedHeader PUB_REC_HEADER

PUB_REL_HEADER

public static final MqttFixedHeader PUB_REL_HEADER

PUB_REL_HEADER_DUP

public static final MqttFixedHeader PUB_REL_HEADER_DUP

PUB_COMP_HEADER

public static final MqttFixedHeader PUB_COMP_HEADER

SUBSCRIBE_HEADER

public static final MqttFixedHeader SUBSCRIBE_HEADER

SUBSCRIBE_HEADER_DUP

public static final MqttFixedHeader SUBSCRIBE_HEADER_DUP

SUB_ACK_HEADER

public static final MqttFixedHeader SUB_ACK_HEADER

UNSUBSCRIBE_HEADER

public static final MqttFixedHeader UNSUBSCRIBE_HEADER

UNSUBSCRIBE_HEADER_DUP

public static final MqttFixedHeader UNSUBSCRIBE_HEADER_DUP

UNSUB_ACK_HEADER

public static final MqttFixedHeader UNSUB_ACK_HEADER

PING_REQ_HEADER

public static final MqttFixedHeader PING_REQ_HEADER

PING_RESP_HEADER

public static final MqttFixedHeader PING_RESP_HEADER

DISCONNECT_HEADER

public static final MqttFixedHeader DISCONNECT_HEADER

PUB_QOS0_HEADER

public static final MqttFixedHeader PUB_QOS0_HEADER

PUB_RETAIN_QOS0_HEADER

public static final MqttFixedHeader PUB_RETAIN_QOS0_HEADER

PUB_QOS1_HEADER

public static final MqttFixedHeader PUB_QOS1_HEADER

PUB_RETAIN_QOS1_HEADER

public static final MqttFixedHeader PUB_RETAIN_QOS1_HEADER

PUB_QOS2_HEADER

public static final MqttFixedHeader PUB_QOS2_HEADER

PUB_RETAIN_QOS2_HEADER

public static final MqttFixedHeader PUB_RETAIN_QOS2_HEADER

PUB_FAILURE_HEADER

public static final MqttFixedHeader PUB_FAILURE_HEADER

方法详细资料

writeTo

public void writeTo(MqttWriter mqttWriter)
             throws IOException

抛出:

IOException

getInstance

public static MqttFixedHeader getInstance(MqttMessageType messageType,
                                          boolean dup,
                                          int qosLevel,
                                          boolean retain)

getMessageType

public MqttMessageType getMessageType()

isDup

public boolean isDup()

getQosLevel

public MqttQoS getQosLevel()

isRetain

public boolean isRetain()