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Package cerberus
Short Description Circuit Breaker pattern implementation in PHP
License MIT
Homepage https://github.com/mt-olympus/cerberus
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Informations about the package cerberus
Cerberus
Introduction
This is a Circuit Breaker pattern implementation in PHP.
This library helps you to handle external services timeouts and outages.
It detects service failures and adapts itself.
You can combine this library with Metis to have a realiable Load Balance service.
Requirements
- PHP >= 5.5
- Zend Cache
Instalation
Configuration
You can manually create a Cerberus instance or use a Factory
Factory
If you use a Container Interopt campatible project, you can define a factory:
and copy the configuration file config/cerberus.global.php.dist to your config/autoload/cerberus.global.php and change to your needs.
The maxFailure parameter is the number of failures after which the circuit is opened and the service becomes not available.
When the timeout is reached, the circuit becomes half opened and one attempt is possible and the status is updated.
The storage key is a zend-cache configuration. You can check the official documentation.
The namespace key inside the storage is important. It defines de default namespace for Cerberus cache capabilities. If
you choose to call Cerberus methods with service name (see Usage bellow), you can ommit this as it will be ignored.
Manually
You can create a Cerberus instance manually:
The $storageConfig is the zend-cache configuration as above.
Usage
The usage is simple. Each time you will access a remote resource (like an Web Service), check for its availability and report its success or failure:
You can use Cerberus to control more than one service. In this scenario, use the methods passing a service name:
All versions of cerberus with dependencies
zendframework/zend-stdlib Version ^2.7 || ^3.0
zendframework/zend-servicemanager Version ^2.7 || ^3.0
zendframework/zend-cache Version ^2.7