breakers

Usable Circuit Breaker pattern implementation.

Install

$ pip install breakers

Usage

import functools
from breakers import Breaker

def circuit_breaker(time_span=20000, unit=1000, calls_limit=10,
                    error_limit=0.5, retry_time=10000):
    def deco(func):
        # Create breaker
        if not hasattr(func, '__breaker__'):
            func.__breaker__ = Breaker(time_span, unit, calls_limit,
                                       error_limit, retry_time)
        breaker = func.__breaker__

        @functools.wraps(func)
        def wraps(*args, **kwargs):
            if not breaker.is_allow():
                raise RuntimeError('Circuit breaker')

            exc = None
            try:
                return func(*args, **kwargs)
            except Exception as e:
                exc = e
                raise
            finally:
                if exc:
                    breaker.add_failure(1)
                else:
                    breaker.add_success(1)
        return wraps
    return deco

@circuit_breaker()
def f():
    import random
    if random.randint(1, 4) in (1, 2):
        raise ValueError
    return 'succeed'

Metadata

Release files for breakers 0.1.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for breakers 0.1.0
File	Size	Uploaded
breakers-0.1.0.tar.gz	3.3 kB	Mar 17, 2017	Details

Built distribution (wheel)

Table of built distributions (wheels) for breakers 0.1.0
File	Interpreter	ABI	Platform	Reset
breakers-0.1.0-py2.py3-none-any.whl 5.4 kB Mar 17, 2017	Python 3, Python 2	none	any	Details

Total release size: 8.7 kB

Release files / breakers-0.1.0.tar.gz

Download URL	breakers-0.1.0.tar.gz
Size	3.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`af332c5b5417cf1a1889ba456a1da0d85aa8e8003e8f93e5bde5835f158f4482`
BLAKE2b-256 checksum How to use checksums	`78a0fef4c8d07538edeb68c87b2199dc02c0c4740adfbe271eb3cc2d45221d52`
Upload date	Mar 17, 2017
Uploaded using Trusted Publishing? What is trusted publishing?	No

Release files / breakers-0.1.0-py2.py3-none-any.whl

Download URL	breakers-0.1.0-py2.py3-none-any.whl
Size	5.4 kB
Tags	Python 2 Python 3
SHA-256 checksum How to use checksums	`9a61cf5c6477c850efc2916ce3e6ae13a4a8f544b70c8bfdd4be0649409c426b`
BLAKE2b-256 checksum How to use checksums	`be5effa1e68eec8fd610b3d661ad48075fc39ba95bf1492a9c898167f32b7e85`
Upload date	Mar 17, 2017
Uploaded using Trusted Publishing? What is trusted publishing?	No

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This release

0.1.0 This release

Mar 17, 2017 2 release files

breakers 0.1.0