redis-extending-lock 0.0.4

Usage

import asyncio
import logging

from redis.asyncio import Redis
from redis_extending_lock import ExtendingLock


async def main():
    redis = Redis.from_url('redis://:hackme@localhost:6379/0')
    lock = ExtendingLock(
        redis, 'example',
        timeout=2,
        # optional, if not specified explicitly
        # would be half of timeout
        reacquiring_timeout=1,
        blocking_timeout=0,
    )

    async with lock:
        # your long-running task,
        # would be cancelled if lock would be not able to extend
        # for some reason
        await asyncio.Future()


logging.basicConfig(level=logging.DEBUG)
asyncio.run(main())

Lock can be also used without context manager:

import asyncio
import logging

from redis.asyncio import Redis
from redis_extending_lock import ExtendingLock


async def main():
    redis = Redis.from_url('redis://:hackme@localhost:6379/0')
    lock = ExtendingLock(
        redis, 'example', timeout=2, blocking_timeout=0,
    )
    await lock.acquire()
    await asyncio.sleep(5)
    await lock.release()


logging.basicConfig(level=logging.DEBUG)
asyncio.run(main())

How to develop

• make devenv - configure the development environment

• poetry shell or source .venv/bin/activate - activate virtualenv

• make lint - syntax & code style check

• make codestyle - reformat code

• make test - test this project

• make build - build this project

Versioning

This software follows Semantic Versioning.

Version is represented using MAJOR.MINOR.PATCH numbers, increment the:

• MAJOR version when you make incompatible API changes

• MINOR version when you add functionality in a backwards compatible manner

• PATCH version when you make backwards compatible bug fixes

• Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.

In this case, the package version is assigned automatically with poem-plugins, it using on the tag in the repository as a major and minor and the counter, which takes the number of commits between tag to the head of branch.