fastsqs 0.1.3

Async SQS routing and middleware library

fastsqs

Fast, modern, async SQS routing and middleware for Python.

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Key Features

• 🚀 High Performance: Async message routing for AWS SQS, designed for speed and scalability.
• 🧩 Declarative Routing: Organize your SQS message handling with nested routers and decorators.
• 🔒 Validation: Per-route payload validation using Pydantic models.
• 🛠️ Middleware: Add before/after hooks for logging, timing, masking, and more.
• 🦾 Partial Batch Failure: Native support for AWS Lambda batch failure responses.
• 🐍 Pythonic & Intuitive: Type hints, editor support, and a familiar API for Python developers.

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Requirements

• Python 3.8+
• Pydantic (installed automatically)

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Installation

pip install fastsqs

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Example

Create your app

from fastsqs import QueueApp, QueueRouter, Middleware
from pydantic import BaseModel

class GreetingPayload(BaseModel):
    type: str
    message: str

router = QueueRouter(key="type")

@router.route("greeting", model=GreetingPayload)
async def handle_greeting(payload, record, context, ctx, data):
    print(f"Greeting: {data.message}")

app = QueueApp(title="Greeting SQS App", debug=True)
app.include_router(router)


def lambda_handler(event, context):
    return app.handler(event, context)

Example Payload

{
  "type": "greeting",
  "message": "Hello from SQS!"
}

Add Middleware

class PrintMiddleware(Middleware):
    async def before(self, payload, record, context, ctx):
        print("Before:", payload)
    async def after(self, payload, record, context, ctx, error):
        print("After:", payload, "Error:", error)

app.add_middleware(PrintMiddleware())

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How it Works

• Routing: Use QueueRouter to route messages by payload fields. Decorators make it easy to register handlers.
• Validation: Attach Pydantic models to routes for automatic payload validation.
• Middleware: Add global or per-route middleware for logging, timing, masking, etc.
• Batch Failure: Handles partial failures for SQS-triggered Lambda functions, so only failed messages are retried.

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Documentation

• API Reference (coming soon)
• Tutorials (coming soon)
• Examples (see examples/)

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Contributing

Contributions, issues, and feature requests are welcome!
Please open an issue or submit a pull request.

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License

This project is licensed under the terms of the MIT license.

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Ready to build async, robust SQS message processors? Try fastsqs today!