Struct CorrelationMetadata 

#[non_exhaustive]
pub struct CorrelationMetadata {
    pub correlation_id: Option<CorrelationId>,
    pub conversation_id: ConversationId,
    pub causation_id: Option<MessageId>,
    pub request_id: Option<RequestId>,
}

Correlation and conversation identity for one envelope.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

correlation_id: Option<CorrelationId>

Application/business workflow correlation, set by the caller.

conversation_id: ConversationId

Groups every message in one business conversation.

causation_id: Option<MessageId>

The message that directly caused this one.

request_id: Option<RequestId>

The inbound request that (transitively) caused this one.

Trait Implementations

impl Clone for CorrelationMetadata

fn clone(&self) -> CorrelationMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CorrelationMetadata

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

Formats the value using the given formatter.

impl Default for CorrelationMetadata

Sets conversation_id to the ConversationId::UNSET sentinel (the nil UUID) — not a fresh mint — so crate::EnvelopeBuilder::build can tell “not yet rooted” from a genuinely chosen value by comparing it, not by tracking which builder setter was called. build replaces UNSET with the envelope’s own id, so an un-correlated message is the root of its own conversation, and leaves any other value alone. A Metadata that never passes through the builder (e.g. read straight off Default) keeps the placeholder verbatim.

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for CorrelationMetadata

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CorrelationMetadata