Struct SystemClock 

pub struct SystemClock;

The host’s system clock: what a table reads unless it names another.

Examples

use std::time::{Duration, SystemTime};

use chrono::{DateTime, Utc};
use ruststream_sqlx::prelude::*;
use ruststream_sqlx::{Clock, SystemClock};
use serde::Deserialize;
use sqlx::PgPool;

/// The system clock five seconds ahead: a staging host replaying tomorrow's tasks a little early.
pub struct Ahead;

impl Clock for Ahead {
    fn now() -> SystemTime {
        SystemClock::now() + Duration::from_secs(5)
    }
}

#[derive(Inbox, sqlx::FromRow)]
#[inbox(table = "replay_jobs", clock = Ahead)]
pub struct Replay {
    #[field(id, generated)]
    id: i64,
    #[field(retry_after, generated)]
    retry_after: DateTime<Utc>,
    #[field(payload)]
    payload: Vec<u8>,
}

#[derive(Deserialize)]
struct Task {
    n: u32,
}

#[subscriber(InboxQueue::<Replay>::new("replays"))]
async fn replay(task: &Task) -> HandlerOutcome {
    tracing::info!(task.n, "replaying");
    HandlerOutcome::ack()
}

pub fn app(pool: PgPool) -> RustStream {
    RustStream::new(AppInfo::new("staging", "0.1.0")).with_broker(SqlxBroker::new(pool), |b| {
        b.include(replay);
    })
}

Trait Implementations

impl Clock for SystemClock

fn now() -> SystemTime

Now.

impl Clone for SystemClock

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SystemClock

impl Debug for SystemClock

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

Formats the value using the given formatter.

impl Default for SystemClock

fn default() -> Self

Returns the “default value” for a type.

impl Eq for SystemClock

impl Hash for SystemClock

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SystemClock

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SystemClock