Struct DeliveryMetadata 

#[non_exhaustive]
pub struct DeliveryMetadata {
    pub content_type: ContentType,
    pub sent_at: Option<OffsetDateTime>,
    pub expires_at: Option<OffsetDateTime>,
    pub deduplication_id: Option<String>,
}

Serialization and delivery hints for one envelope.

use reliar_core::Envelope;
let one_day = time::Duration::days(1);
let envelope = Envelope::builder(Ping)
    .expires_at(time::OffsetDateTime::now_utc() + one_day)
    .build();
assert!(envelope.metadata.delivery.expires_at.is_some());
// Set by the serializer that produced the body, never chosen at the call site.
assert_eq!(envelope.metadata.delivery.content_type.as_str(), "application/json");

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.

content_type: ContentType

Authoritatively set by the store at enqueue from Serializer::content_type(), and read back from the provider’s content_type column on rehydration. The Default value below is a placeholder a call site never chooses (ADR 0010).

sent_at: Option<OffsetDateTime>

When the application handed this message to Reliar (app clock; never compared against a DB timestamp).

expires_at: Option<OffsetDateTime>

The time after which this message must not be published. Enforced in DB time by a provider’s claim predicate; an expired pending row goes dead without consuming a retry attempt.

deduplication_id: Option<String>

A transport mapper’s broker-specific dedup key (falling back to the message id). Reliar never deduplicates on it in the database.

Trait Implementations

impl Clone for DeliveryMetadata

fn clone(&self) -> DeliveryMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeliveryMetadata

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

Formats the value using the given formatter.

impl Default for DeliveryMetadata

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DeliveryMetadata

Available on crate feature serde only.

fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl PartialEq for DeliveryMetadata

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for DeliveryMetadata

Available on crate feature serde only.

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DeliveryMetadata