Struct PostgresInboxSettings 

#[non_exhaustive]
pub struct PostgresInboxSettings {
    pub statement_timeout: Duration,
    pub max_attempts: u32,
}

What is provider-specific about the inbox (inbox contract §3). A separate settings type from PostgresOutboxSettings — the inbox has no lease/ordering/retention knobs. It does share the outbox’s Self::statement_timeout knob, applied to the same kind of call: every statement the inbox issues on its own pool (fail, find, purge) rather than the caller’s transaction (claim/complete, which stay the caller’s to bound).

Built from Self::default plus builder methods, never a struct literal (#[non_exhaustive] so a new field never breaks a caller outside this crate):

use reliar_store_postgres::PostgresInboxSettings;
use std::time::Duration;

let settings = PostgresInboxSettings::default()
    .statement_timeout(Duration::from_secs(2))
    .max_attempts(5);

assert_eq!(settings.statement_timeout, Duration::from_secs(2));
assert_eq!(settings.max_attempts, 5);

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.

statement_timeout: Duration

Applied as SET LOCAL statement_timeout inside the short transaction Reliar opens for every statement it issues on its own pool — fail, find, each of purge’s three deletes (completed, incomplete, dead), and every InboxDeadLetters call (list_dead/retry_dead/purge_dead) — never the caller’s claim/complete transaction, which is the caller’s own to bound. Exists chiefly for fail’s INSERT … ON CONFLICT DO UPDATE, which otherwise blocks unbounded behind a concurrent claimer’s still-open transaction on the same (scope, message_id) — a canceled statement classifies FailureKind::Transient, so leaving this at Duration::ZERO lets fail block for as long as the concurrent handler’s own transaction runs. Duration::ZERO (the default) issues nothing and inherits the server/role setting; a non-zero value costs a BEGIN/SET LOCAL/statement/COMMIT round trip on every call. STATEMENT_TIMEOUT_MS.

max_attempts: u32

The bound crate::PostgresInboxStore’s InboxStore::fail applies to recorded failures before setting dead_at (ADR 0042 A.2.4). Lives here, in the provider, rather than in reliar-inbox, because the transition must be computed atomically with the increment — fail’s single INSERT … ON CONFLICT DO UPDATE decides attempts + 1 >= max_attempts in SQL.

0 is a configuration error, rejected by Self::validate and therefore by crate::PostgresInboxStore::with_settings — 0 reads as “no retries” and does the opposite. u32::MAX spells “unbounded” explicitly. Default 10. MAX_ATTEMPTS.

Implementations

impl PostgresInboxSettings

pub const fn statement_timeout(self, timeout: Duration) -> Self

Sets Self::statement_timeout.

use reliar_store_postgres::PostgresInboxSettings;
use std::time::Duration;

let settings = PostgresInboxSettings::default()
    .statement_timeout(Duration::from_millis(500));
assert_eq!(settings.statement_timeout, Duration::from_millis(500));

pub const fn max_attempts(self, max_attempts: u32) -> Self

Sets Self::max_attempts.

use reliar_store_postgres::PostgresInboxSettings;
let settings = PostgresInboxSettings::default().max_attempts(3);
assert_eq!(settings.max_attempts, 3);

pub fn from_env(prefix: &str) -> Result<Self, SettingsError>

Opt-in, mirroring PostgresOutboxSettings::from_env. Starts from Self::default, overrides only the variables present under prefix.

Errors

Returns SettingsError::Parse for a present-but-unparseable value.

Trait Implementations

impl Clone for PostgresInboxSettings

fn clone(&self) -> PostgresInboxSettings

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PostgresInboxSettings

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

Formats the value using the given formatter.

impl Default for PostgresInboxSettings

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PostgresInboxSettings

where PostgresInboxSettings: Default,

Available on crate feature serde only.

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PostgresInboxSettings

Available on crate feature serde only.

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

where __S: Serializer,

Serialize this value into the given Serde serializer.