rrq 0.9.17

RRQ is a library for creating reliable job queues using Rust, Redis. with language-agnostic producers and workers.

RRQ: Reliable Redis Queue

RRQ is a distributed job queue that actually works. It combines a Rust-powered orchestrator with language-native workers to give you the reliability of battle-tested infrastructure with the flexibility of writing job handlers in Python, TypeScript, or Rust.

Why RRQ?

Most job queues make you choose: either fight with complex distributed systems concepts, or accept unreliable "good enough" solutions. RRQ takes a different approach:

• Rust orchestrator, any-language workers - The hard parts (scheduling, retries, locking, timeouts) are handled by a single-binary Rust process. Your job handlers are just normal async functions in your preferred language.

• Redis as the source of truth - No separate databases to manage. Jobs, queues, locks, and results all live in Redis with atomic operations and predictable semantics.

• Production-grade features built in - Retry policies, dead letter queues, job timeouts, cron scheduling, distributed tracing, and health checks work out of the box.

• Fast and lightweight - The Rust orchestrator handles thousands of jobs per second with minimal memory. Workers are isolated processes that can be scaled independently.

How It Works

┌──────────────────────────────┐
│     Your Application         │
│  (Python, TypeScript, Rust)  │
│                              │
│ client.enqueue("job", {...}) │
└───────────────┬──────────────┘
                │ enqueue jobs
                ▼
      ┌───────────────────────┐
      │         Redis         │
      │  queues, jobs, locks  │
      └──────────┬────────────┘
                 │ poll/dispatch
                 ▼
      ┌──────────────────────────────┐
      │     RRQ Orchestrator         │
      │   (single Rust binary)       │
      │ • scheduling & retries       │
      │ • timeouts & deadlines       │
      │ • dead letter queue          │
      │ • cron jobs                  │
      └──────────┬───────────────────┘
                 │ socket protocol
                 ▼
   ┌─────────────────────────────────────────┐
   │              Job Runners                 │
   │  ┌─────────────┐    ┌─────────────┐     │
   │  │   Python    │    │ TypeScript  │     │
   │  │   Worker    │    │   Worker    │     │
   │  └─────────────┘    └─────────────┘     │
   └─────────────────────────────────────────┘

This Package

This Python package (rrq) gives you everything you need to work with RRQ from Python:

• Producer client - Enqueue jobs from your Python application
• Runner runtime - Execute job handlers written in Python
• OpenTelemetry integration - Distributed tracing from producer to runner

The Rust orchestrator binary is bundled in the wheel, so there's nothing else to install.

Quick Start

1. Install

pip install rrq
# or
uv pip install rrq

2. Create configuration (rrq.toml)

[rrq]
redis_dsn = "redis://localhost:6379/0"
default_runner_name = "python"

[rrq.runners.python]
type = "socket"
cmd = ["rrq-runner", "--settings", "myapp.runner:settings"]
tcp_socket = "127.0.0.1:9000"

3. Write a job handler

# myapp/handlers.py
from rrq.runner import ExecutionRequest

async def send_welcome_email(request: ExecutionRequest):
    user_email = request.params.get("email")
    template = request.params.get("template", "welcome")

    # Your email sending logic here
    await send_email(to=user_email, template=template)

    return {"sent": True, "email": user_email}

4. Register handlers

# myapp/runner.py
from rrq.runner_settings import PythonRunnerSettings
from rrq.registry import Registry
from myapp import handlers

registry = Registry()
registry.register("send_welcome_email", handlers.send_welcome_email)

settings = PythonRunnerSettings(registry=registry)

5. Start the system

# Terminal 1: Start the orchestrator (runs runners automatically)
rrq worker run --config rrq.toml

# That's it! The orchestrator spawns and manages your Python runners.

6. Enqueue jobs

import asyncio
from rrq.client import RRQClient

async def main():
    client = RRQClient(config_path="rrq.toml")

    job_id = await client.enqueue(
        "send_welcome_email",
        {
            "params": {
                "email": "[e-mail]",
                "template": "welcome",
            }
        },
    )

    print(f"Enqueued job: {job_id}")
    await client.close()

asyncio.run(main())

Features

Scheduled Jobs

Delay job execution:

# Run in 5 minutes
await client.enqueue("cleanup", {"defer_by_seconds": 300})

# Run at a specific time
from datetime import datetime, timezone
await client.enqueue(
    "report",
    {"defer_until": datetime(2024, 1, 1, 9, 0, tzinfo=timezone.utc)},
)

Unique Jobs (Idempotency)

Prevent duplicate jobs:

# Only one job with this key will be enqueued
await client.enqueue_with_unique_key(
    "process_order",
    "order-123",
    {"params": {"order_id": "123"}},
)

Rate Limiting

Limit how often a job can run:

job_id = await client.enqueue_with_rate_limit(
    "sync_user",
    {
        "params": {"user_id": "456"},
        "rate_limit_key": "user-456",
        "rate_limit_seconds": 60,
    },
)
if job_id is None:
    print("Rate limited, try again later")

Debouncing

Delay and deduplicate rapid job submissions:

# Only the last enqueue within the window will execute
await client.enqueue_with_debounce(
    "save_document",
    {
        "params": {"doc_id": "789"},
        "debounce_key": "doc-789",
        "debounce_seconds": 5,
    },
)

Cron Jobs

Schedule recurring jobs in rrq.toml:

[[rrq.cron_jobs]]
function_name = "daily_report"
schedule = "0 0 9 * * *"  # 9 AM daily (6-field cron with seconds)
queue_name = "scheduled"

Job Status

Check job progress:

status = await client.get_job_status(job_id)
print(f"Status: {status}")

OpenTelemetry

Enable distributed tracing:

from rrq.integrations import otel
otel.enable(service_name="my-service")

Traces propagate from producer → orchestrator → runner automatically.

Configuration Reference

See docs/CONFIG_REFERENCE.md for the full TOML schema.

Key settings:

[rrq]
redis_dsn = "redis://localhost:6379/0"
default_runner_name = "python"
default_job_timeout_seconds = 300  # 5 minutes
default_max_retries = 3

[rrq.runners.python]
type = "socket"
cmd = ["rrq-runner", "--settings", "myapp.runner:settings"]
tcp_socket = "127.0.0.1:9000"
pool_size = 4           # Number of runner processes
max_in_flight = 10      # Concurrent jobs per runner

Related Packages

Package	Language	Purpose
rrq	Python	Producer client + runner (this package)
rrq-ts	TypeScript	Producer client + runner
rrq	Rust	Orchestrator binary
rrq-producer	Rust	Native producer client
rrq-runner	Rust	Native runner runtime

Requirements

• Python 3.11+
• Redis 5.0+

License

Apache-2.0