Struct Message 

pub struct Message {
    pub id: String,
    pub payload: Vec<u8>,
    pub headers: HashMap<String, String>,
    pub topic: String,
    pub timestamp: DateTime<Utc>,
    pub correlation_id: Option<String>,
    pub reply_to: Option<String>,
    pub content_type: Option<String>,
    pub priority: Option<u8>,
    pub ttl: Option<u64>,
}

A message to be sent or received from a message broker

Fields

id: String

Unique message identifier

payload: Vec<u8>

Message payload as bytes

headers: HashMap<String, String>

Message headers/properties

topic: String

Topic/queue/subject the message belongs to

timestamp: DateTime<Utc>

Timestamp when the message was created

correlation_id: Option<String>

Optional correlation ID for request-response patterns

reply_to: Option<String>

Optional reply-to address

content_type: Option<String>

Message content type (e.g., “application/json”)

priority: Option<u8>

Message priority (0-9, where 9 is highest)

ttl: Option<u64>

Time-to-live in milliseconds

Implementations

impl Message

pub fn new<T: Into<Vec<u8>>>(topic: impl Into<String>, payload: T) -> Self

Create a new message with the given payload

pub fn json<T: Serialize>( topic: impl Into<String>, value: &T, ) -> Result<Self, MessagingError>

Create a message from a JSON-serializable value

pub fn parse_json<T: for<'de> Deserialize<'de>>( &self, ) -> Result<T, MessagingError>

Parse the payload as JSON

pub fn payload_str(&self) -> Result<&str, MessagingError>

Get the payload as a UTF-8 string

pub fn with_header( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add a header to the message

pub fn with_correlation_id(self, id: impl Into<String>) -> Self

Set the correlation ID

pub fn with_reply_to(self, reply_to: impl Into<String>) -> Self

Set the reply-to address

pub fn with_content_type(self, content_type: impl Into<String>) -> Self

Set the content type

pub fn with_priority(self, priority: u8) -> Self

Set the priority (0-9)

pub fn with_ttl(self, ttl_ms: u64) -> Self

Set the time-to-live in milliseconds

pub fn with_ttl_duration(self, ttl: Duration) -> Self

Set the time-to-live from a Duration

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Message

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Message

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

Formats the value using the given formatter.

impl Serialize for Message

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.