abxbus-rust

Idiomatic Rust implementation of abxbus, matching the Python/TypeScript event JSON surface and execution semantics as closely as possible.

Current scope

Implemented core features:

• Base event model and event result model with serde JSON compatibility
• Async event bus with queueing and queue-jump behavior
• Event concurrency: global-serial, bus-serial, parallel
• Handler concurrency: serial, parallel
• Handler completion strategies: all, first
• Event path tracking and pending bus count

Not yet implemented in this crate revision:

• Bridges
• Middlewares (hook points are left in code comments)

Quickstart

use abxbus_rust::{event, event_bus::EventBus};
use futures::executor::block_on;
use serde_json::json;

event! {
    struct UserLoginEvent {
        username: String,
        event_result_type: serde_json::Value,
    }
}

let bus = EventBus::new(Some("MainBus".to_string()));
bus.on(UserLoginEvent, |event: UserLoginEvent| async move {
    Ok(json!({"ok": true, "username": event.username}))
});

let event = bus.emit(UserLoginEvent {
    username: "alice".to_string(),
    ..Default::default()
});

block_on(async {
    event.done().await;
    println!("{}", event.inner.to_json_value());
});