Skip to main content

A redis semaphore implementation using eval scripts

Project description

Redis Semaphore Eval

codecov Actions Status Version PyPI - Wheel Pyversions

https://redislabs.com/ebook/part-2-core-concepts/chapter-6-application-components-in-redis/6-3-counting-semaphores/

Usage

To acquire a lock:

from redis import Redis
from redis_semaphore_eval import semaphore

redis = Redis(host="localhost", port=6379, db=0)
key = "unique_lock_key"
with semaphore(redis, key=key, limit=2, expire_in=5, timeout=1) as lock_id:
    ...

To acquire a lock but continuously renew it in a background thread:

from redis import Redis
from redis_semaphore_eval import auto_renewing_semaphore

redis = Redis(host="localhost", port=6379, db=0)
key = "unique_lock_key"
with auto_renewing_semaphore(
    redis,
    key=key,
    limit=2,
    expire_in=5,
    timeout=1,
    auto_renewal_interval=4
) as lock_id:
    ...

Contributing

poetry run pre-commit install -t pre-commit -t commit-msg && poetry run pre-commit run --all
docker-compose up -d
poetry run python -m pytest
docker-compose down

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

redis-semaphore-eval-0.3.0.tar.gz (4.5 kB view hashes)

Uploaded Source

Built Distribution

redis_semaphore_eval-0.3.0-py3-none-any.whl (4.3 kB view hashes)

Uploaded Python 3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page