Metadata-Version: 2.1
Name: aio-throttle
Version: 1.6.0
Summary: A simple throttling package
Home-page: https://github.com/Pliner/aio-throttle
Author: Yury Pliner
Author-email: yury.pliner@gmail.com
License: UNKNOWN
Description: This library is inspired by [this book](https://landing.google.com/sre/sre-book/chapters/handling-overload/) and this implementation https://github.com/vostok/throttling.
        
        Features:
        1. Set capacity(max parallel requests) and queue(max queued requests) limits.
        1. Per-consumer limits. For instance, to not allow any consumer to use more than 70% of service's capacity.
        1. Per-request priorities. For instance, to not allow requests with lowest priority to be queued or to now allow requests with normal priority to use more than 90% of service's capacity. 
        
        Example:
        ```python
        from aio_throttle import Throttler, MaxFractionCapacityQuota, ThrottlePriority, ThrottleResult
        
        capacity_limit = 100
        queue_limit = 200
        consumer_quotas = [MaxFractionCapacityQuota(0.7)]
        priority_quotas = [MaxFractionCapacityQuota(0.9, ThrottlePriority.NORMAL)]
        throttler = Throttler(capacity_limit, queue_limit, consumer_quotas, priority_quotas)
        
        
        consumer, priority = "yet another consumer", ThrottlePriority.HIGH
        async with throttler.throttle(consumer=consumer, priority=priority) as result:
            ... # check if result is ThrottleResult.ACCEPTED or not
        ```
        
        Example of an integration with aiohttp and prometheus_client
        ```python
        from aiohttp import web
        from aiohttp.web_app import Application
        from aiohttp.web_request import Request
        from aiohttp.web_response import Response
        
        from aio_throttle.aiohttp import throttling_middleware, setup_throttling
        from aio_throttle.prometheus import prometheus_aware_throttler, build_throttle_results_counter
        
        throttle_results_counter = build_throttle_results_counter()
        
        
        async def ok(_: Request) -> Response:
            return Response()
        
        
        async def create_app() -> Application:
            app = web.Application(middlewares=[throttling_middleware()])
            setup_throttling(app, extensions=[prometheus_aware_throttler(throttle_results_counter=throttle_results_counter)])
            app.router.add_get("/", ok)
            return app
        
        
        web.run_app(create_app(), port=8080, access_log=None)
        ```
Platform: UNKNOWN
Requires-Python: >=3.7
Description-Content-Type: text/markdown
