Struct LastWill 

pub struct LastWill<'a> {
    pub topic: &'a str,
    pub message: &'a [u8],
    pub retain: bool,
    pub qos: QoS,
}

LastWill describes a message to be published if the client disconnects unexpectedly, e.g. if the socket gets closed before a DISCONNECT packet could be sent by the client.

Fields

topic: &'a str

The topic to publish in

message: &'a [u8]

The message (aka payload) to publish

retain: bool

Whether the last will message should be retained

qos: QoS

The quality of service of the last will message