Struct Publish 

pub struct Publish {

    pub duplicate: bool,
    pub qos: QoS,
    pub retain: bool,
    pub topic_name: Topic,
    pub packet_identifier: Option<u16>,
    pub payload_format_indicator: bool,
    pub message_expiry_interval: Option<u32>,
    pub topic_alias: Option<u16>,
    pub response_topic: Option<Topic>,
    pub correlation_data: Option<Vec<u8>>,
    pub user_properties: Vec<(String, String)>,
    pub subscription_identifiers: Vec<u32>,
    pub content_type: String,
    pub message: Vec<u8>,
}

The Publish packet is used to send an application message to a given topic.

Fields

duplicate: bool

In case of AtLeastOnce and ExactlyOnce qualities of service, duplicate is set to true when the message is a new attempt to send an earlier one.

qos: QoS

The quality of service of the message.

retain: bool

If true, the server must retain it in order to publish it for delivery upon future connections.

topic_name: Topic

The name of the topic to publish the message to.

packet_identifier: Option<u16>

The packet identifier is used in AtLeastOnce and ExactlyOnce qualities of service to keep track of the packet.

payload_format_indicator: bool

If true, the will message will be a valid UTF-8 encoded string. If not the will message can be anything, even a unicorn.

message_expiry_interval: Option<u32>

Optional delay before the server must drop a message before it does not deliver it to anyone.

topic_alias: Option<u16>

The topic alias. It is used to replace the topic string.

response_topic: Option<Topic>

If the message is part of a Request/Response communication, the response topic is use to assign the topic which must be used as response. The presence of a response topic identifies the message as a requestion.

correlation_data: Option<Vec<u8>>

If the message is part of a Request/Response communication, it can be optionnaly accompagnied with correlation data which are exchanged between the communication endpoints.

user_properties: Vec<(String, String)>

General purpose user properties.

subscription_identifiers: Vec<u32>

References the different subscriptions identifiers that are used for the message delivery.

content_type: String

Describes the type of content of the payload. Is generally a MIME descriptor.

message: Vec<u8>

The content of the message

Trait Implementations

impl Clone for Publish

fn clone(&self) -> Publish

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Publish

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Publish

fn default() -> Self

Builds a publish packet with message and topic name

impl From<Publish> for Packet

fn from(control: Publish) -> Self

Converts to this type from the input type.

impl PartialEq for Publish

fn eq(&self, other: &Publish) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Publish