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Example code of yriveiro/php-backoff

Informations about the package php-backoff

Backoff, Simple backoff / retry functionality

License Build Status Coverage Status Total Downloads SensioLabsInsight

NOTE: to use php-backoff with PHP 5.x please use the lastet release of branch 1.x

API

getDefaultOptions():

This method is static and returns an array with the default options:

exponential($attempt):

This method use and exponential function E(attempt) = (2**attempt - 1) to calculate backoff time.

Parameters

equalJitter($attempt);

Exponential backoff has one disadvantage. In high concurrence, we can have multiples calls with the same backoff time due the time is highly bound to the current attempt, different calls could be in the same attempt.

To solve this we can add a jitter value to allow some randomization.

equalJitter uses the function: E(attempt) = min(((2**attempt - 1) / 2), random(0, ((2**attempt - 1) / 2))).

Parameters

fullJitter($attempt);

Full jitter behaves like equalJitter method, the main difference between them is the way in how the jitter value is calculated.

fullJitter uses the function: E(attempt) = min(random(0, (2**attempt - 1) / 2)).

Parameters

Usage

Zero configuration examples:

With zero configuration, we will never stop to try fetch data. The exit condition is your responsibility.

With configuration examples:

Installation

The recommended way to install this package is through Composer.

Tests

Tests are performed using the phpunit library, to run them:

Know issues

None.

How to contribute

Have an idea? Found a bug?, contributions are welcome :)

License

Backoff is licensed under MIT license.

All versions of php-backoff with dependencies

PHP Build Version
Package Version
Requires php Version >=7.0
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