> ## Documentation Index
> Fetch the complete documentation index at: https://abxbus.archivebox.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Transport bridges for forwarding events across files, sockets, and external services.

Bridges are optional connectors for forwarding serialized events between buses in different processes or machines.

All bridges expose the same minimal surface:

* `emit(...)` for outbound forwarding
* `on(...)` for inbound subscription
* `start()` and `close()` for lifecycle control

## Quick setup

<Tabs>
  <Tab title="Python">
    ```python theme={null}
    from abxbus import EventBus
    from abxbus.bridges import RedisEventBridge

    bus = EventBus('AppBus')
    bridge = RedisEventBridge('redis://localhost:6379/0/abxbus_events')

    bus.on('*', bridge.emit)
    bridge.on('*', bus.emit)
    ```
  </Tab>

  <Tab title="TypeScript">
    ```ts theme={null}
    import { EventBus } from 'abxbus'
    import { RedisEventBridge } from 'abxbus/bridges'

    const bus = new EventBus('AppBus')
    const bridge = new RedisEventBridge('redis://localhost:6379/0/abxbus_events')

    bus.on('*', bridge.emit)
    bridge.on('*', bus.emit)
    ```
  </Tab>

  <Tab title="Go">
    ```go theme={null}
    bus := abxbus.NewEventBus("AppBus", nil)
    bridge := abxbus.NewJSONLEventBridge("/tmp/abxbus_events.jsonl", 0.25, "JsonlBridge")

    bus.OnEventName("*", "jsonl_emit", func(event *abxbus.BaseEvent) (any, error) {
    	return bridge.Emit(event)
    }, nil)
    bridge.OnEventName("*", "bus_emit", func(event *abxbus.BaseEvent) (any, error) {
    	return bus.Emit(event), nil
    }, nil)
    ```

    Go currently implements `JSONLEventBridge`. The HTTP, socket, Redis, NATS, Postgres, SQLite, and Tachyon bridges are Python/TypeScript-only for now.
  </Tab>

  <Tab title="Rust">
    ```rust theme={null}
    // Not implemented in the Rust crate yet.
    // Use typed event JSON serialization with an external transport for now.
    ```
  </Tab>
</Tabs>

## Bridge pages

* [HTTPEventBridge](./bridge-http)
* [SocketEventBridge](./bridge-socket)
* [RedisEventBridge](./bridge-redis)
* [NATSEventBridge](./bridge-nats)
* [PostgresEventBridge](./bridge-postgres)
* [JSONLEventBridge](./bridge-jsonl)
* [SQLiteEventBridge](./bridge-sqlite)
* [TachyonEventBridge](./bridge-tachyon)