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|
%global _empty_manifest_terminate_build 0
Name: python-aioredis-lock
Version: 0.1.0
Release: 1
Summary: Wrapper to provide distributed locks in aioredis
License: MIT License
URL: https://github.com/mrasband/aioredis-lock
Source0: https://mirrors.nju.edu.cn/pypi/web/packages/f8/c8/adc60ac0a6c3eebff408b7f684bc024e0bd32d2b18b76e0672c571be252b/aioredis-lock-0.1.0.tar.gz
BuildArch: noarch
Requires: python3-aioredis
%description
# aioredis_lock
[](https://circleci.com/gh/mrasband/aioredis-lock)
Implementation of distributed locking with [aioredis](https://github.com/aio-libs/aioredis), an asyncio based redis client.
This is a standalone lib until, and if, [aio-libs/aioredis#573](https://github.com/aio-libs/aioredis/pull/573) is accepted.
## Usage
You need an `aioredis.RedisConnection` or `aioredis.ConnectionsPool` already created.
### Mutex
```python
from aioredis_lock import RedisLock, LockTimeoutError
try:
async with RedisLock(
pool,
key="foobar",
# how long until the lock should expire (seconds). this can be extended
# via `await lock.extend(30)`
timeout=30,
# you can customize how long to allow the lock acquisitions to be
# attempted.
wait_timeout=30,
) as lock:
# If you get here, you now have a lock and are the only program that
# should be running this code at this moment.
# do some work...
# we may want it longer...
await lock.extend(30)
except LockTimeoutError:
# The lock could not be acquired by this worker and we should give up
pass
```
### Simple Leader/Follower(s)
Let's suppose you need a simple leader/follower type implementation where you have a number of web-workers but just want 1 to preform a repeated task. In the case the leader fails someone else should pick up the work. Simply pass `wait_timeout=None` to RedisLock allowing the worker to keep trying to get a lock for when the leader eventually fails. The main complication here is extending the lock and validating the leader still owns it.
```python
from aioredis_lock import RedisLock
# if the lock is lost, we still want to be a follower
while True:
# wait indefinitely to acquire a lock
async with RedisLock(pool, "shared_key", wait_timeout=None) as lock:
# hold the lock as long as possible
while True:
if not await lock.is_owner():
logger.debug("We are no longer the lock owner, falling back")
break
# do some work
if not await lock.renew():
logger.debug("We lost the lock, falling back to follower mode")
break
```
This mostly delegates the work of selecting and more importantly promoting leaders.
%package -n python3-aioredis-lock
Summary: Wrapper to provide distributed locks in aioredis
Provides: python-aioredis-lock
BuildRequires: python3-devel
BuildRequires: python3-setuptools
BuildRequires: python3-pip
%description -n python3-aioredis-lock
# aioredis_lock
[](https://circleci.com/gh/mrasband/aioredis-lock)
Implementation of distributed locking with [aioredis](https://github.com/aio-libs/aioredis), an asyncio based redis client.
This is a standalone lib until, and if, [aio-libs/aioredis#573](https://github.com/aio-libs/aioredis/pull/573) is accepted.
## Usage
You need an `aioredis.RedisConnection` or `aioredis.ConnectionsPool` already created.
### Mutex
```python
from aioredis_lock import RedisLock, LockTimeoutError
try:
async with RedisLock(
pool,
key="foobar",
# how long until the lock should expire (seconds). this can be extended
# via `await lock.extend(30)`
timeout=30,
# you can customize how long to allow the lock acquisitions to be
# attempted.
wait_timeout=30,
) as lock:
# If you get here, you now have a lock and are the only program that
# should be running this code at this moment.
# do some work...
# we may want it longer...
await lock.extend(30)
except LockTimeoutError:
# The lock could not be acquired by this worker and we should give up
pass
```
### Simple Leader/Follower(s)
Let's suppose you need a simple leader/follower type implementation where you have a number of web-workers but just want 1 to preform a repeated task. In the case the leader fails someone else should pick up the work. Simply pass `wait_timeout=None` to RedisLock allowing the worker to keep trying to get a lock for when the leader eventually fails. The main complication here is extending the lock and validating the leader still owns it.
```python
from aioredis_lock import RedisLock
# if the lock is lost, we still want to be a follower
while True:
# wait indefinitely to acquire a lock
async with RedisLock(pool, "shared_key", wait_timeout=None) as lock:
# hold the lock as long as possible
while True:
if not await lock.is_owner():
logger.debug("We are no longer the lock owner, falling back")
break
# do some work
if not await lock.renew():
logger.debug("We lost the lock, falling back to follower mode")
break
```
This mostly delegates the work of selecting and more importantly promoting leaders.
%package help
Summary: Development documents and examples for aioredis-lock
Provides: python3-aioredis-lock-doc
%description help
# aioredis_lock
[](https://circleci.com/gh/mrasband/aioredis-lock)
Implementation of distributed locking with [aioredis](https://github.com/aio-libs/aioredis), an asyncio based redis client.
This is a standalone lib until, and if, [aio-libs/aioredis#573](https://github.com/aio-libs/aioredis/pull/573) is accepted.
## Usage
You need an `aioredis.RedisConnection` or `aioredis.ConnectionsPool` already created.
### Mutex
```python
from aioredis_lock import RedisLock, LockTimeoutError
try:
async with RedisLock(
pool,
key="foobar",
# how long until the lock should expire (seconds). this can be extended
# via `await lock.extend(30)`
timeout=30,
# you can customize how long to allow the lock acquisitions to be
# attempted.
wait_timeout=30,
) as lock:
# If you get here, you now have a lock and are the only program that
# should be running this code at this moment.
# do some work...
# we may want it longer...
await lock.extend(30)
except LockTimeoutError:
# The lock could not be acquired by this worker and we should give up
pass
```
### Simple Leader/Follower(s)
Let's suppose you need a simple leader/follower type implementation where you have a number of web-workers but just want 1 to preform a repeated task. In the case the leader fails someone else should pick up the work. Simply pass `wait_timeout=None` to RedisLock allowing the worker to keep trying to get a lock for when the leader eventually fails. The main complication here is extending the lock and validating the leader still owns it.
```python
from aioredis_lock import RedisLock
# if the lock is lost, we still want to be a follower
while True:
# wait indefinitely to acquire a lock
async with RedisLock(pool, "shared_key", wait_timeout=None) as lock:
# hold the lock as long as possible
while True:
if not await lock.is_owner():
logger.debug("We are no longer the lock owner, falling back")
break
# do some work
if not await lock.renew():
logger.debug("We lost the lock, falling back to follower mode")
break
```
This mostly delegates the work of selecting and more importantly promoting leaders.
%prep
%autosetup -n aioredis-lock-0.1.0
%build
%py3_build
%install
%py3_install
install -d -m755 %{buildroot}/%{_pkgdocdir}
if [ -d doc ]; then cp -arf doc %{buildroot}/%{_pkgdocdir}; fi
if [ -d docs ]; then cp -arf docs %{buildroot}/%{_pkgdocdir}; fi
if [ -d example ]; then cp -arf example %{buildroot}/%{_pkgdocdir}; fi
if [ -d examples ]; then cp -arf examples %{buildroot}/%{_pkgdocdir}; fi
pushd %{buildroot}
if [ -d usr/lib ]; then
find usr/lib -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/lib64 ]; then
find usr/lib64 -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/bin ]; then
find usr/bin -type f -printf "/%h/%f\n" >> filelist.lst
fi
if [ -d usr/sbin ]; then
find usr/sbin -type f -printf "/%h/%f\n" >> filelist.lst
fi
touch doclist.lst
if [ -d usr/share/man ]; then
find usr/share/man -type f -printf "/%h/%f.gz\n" >> doclist.lst
fi
popd
mv %{buildroot}/filelist.lst .
mv %{buildroot}/doclist.lst .
%files -n python3-aioredis-lock -f filelist.lst
%dir %{python3_sitelib}/*
%files help -f doclist.lst
%{_docdir}/*
%changelog
* Wed May 10 2023 Python_Bot <Python_Bot@openeuler.org> - 0.1.0-1
- Package Spec generated
|
