Batch

A background job library written in Rust.

Batch allows you to defer jobs to worker processes, by sending messages to a broker. It is a type-safe library that favors safety over performance in order to minimize risk and avoid mistakes. It is completely asynchronous and is based on the tokio runtime.

Installation

Minimum Rust Version: 1.31

Add this to your Cargo.toml:

[dependencies]
batch = "0.2"

Only if you're using Rust 2015 edition
Then add this to your crate root:

extern crate batch;

Batch in action

use batch::job;
use batch_rabbitmq::{queues, Connection};
use std::path::PathBuf;
use tokio::prelude::Future;

queues! {
    Transcoding {
        name = "transcoding",
        bindings = [
            self::transcode,
        ]
    }
}

#[job(name = "batch-example.transcode")]
fn transcode(path: PathBuf) {
    // ...
}

fn main() {
    let fut = Connection::build("amqp://guest:guest@localhost:5672/%2f")
        .declare(Transcoding)
        .connect()
        .and_then(|mut client| {
            let job = transcode("./video.mp4".into());
            Transcoding(job).dispatch(&mut client)
        })
        .map_err(|e| eprintln!("An error occured: {}", e));
    tokio::run(fut);
}

More examples are available on GitHub and in the guide.

Features

• codegen: (enabled by default): Enables the use of the job procedural macro.

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

lib.rs:

This crate provides a Batch's derive macro.

#[derive(Task)]