Trait RedisSubscribeExt 

pub trait RedisSubscribeExt {
    // Required method
    fn block(self, block: Duration) -> Self;
}

The Redis subscription options a mount site names, chained after the core’s settings steps.

Import it (or glob a form’s prelude) to reach block on a builder over a RedisStream or a RedisList, before or after the window .pipeline() opens and the position start_at(..) names. The trait is bound to those sources, so the method does not appear on a builder for another broker or for a form that has no blocking read.

Examples

use std::time::Duration;

use ruststream_fred::stream::prelude::*;

#[subscriber(RedisStream::new("orders").group("workers"))]
async fn bill(orders: &[Order]) -> HandlerOutcome {
    let total: u64 = orders.iter().map(|order| order.amount).sum();
    tracing::info!(orders = orders.len(), total, "billed");
    HandlerOutcome::ack()
}

#[ruststream::app]
fn app() -> impl App {
    RustStream::new(AppInfo::new("billing", "0.1.0")).with_broker(
        RedisBroker::standalone("redis://localhost:6379"),
        |b| {
            // The size is the core's word, the block is Redis's, and they read in that order.
            b.include(bill.batch(nonzero!(6)).block(Duration::from_secs(5)));
        },
    )
}

Required Methods

fn block(self, block: Duration) -> Self

How long one read blocks waiting for entries, overriding what the descriptor named.

On a stream this is the XREADGROUP server-side BLOCK (and, in reclaim mode, the poll interval between empty XAUTOCLAIM scans); on a list it is the BRPOP / BLMOVE timeout. Both default to five seconds.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<Def, Source, State, DefCodec> RedisSubscribeExt for SubscriberBuilder<Def, Source, State, DefCodec>

where Def: Declared, Source: Blocks,

fn block(self, block: Duration) -> Self

Implementors