53 lines
1.2 KiB
PHP
53 lines
1.2 KiB
PHP
<?php
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namespace PHPCensor\ProcessControl;
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/**
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* Construct an appropriate ProcessControl instance.
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*
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* @author Adirelle <adirelle@gmail.com>
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*/
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class Factory
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{
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/**
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* ProcessControl singleton.
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*
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* @var ProcessControlInterface
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*/
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protected static $instance = null;
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/**
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* Returns the ProcessControl singleton.
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*
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* @return ProcessControlInterface
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*/
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public static function getInstance()
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{
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if (static::$instance === null) {
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static::$instance = static::createProcessControl();
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}
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return static::$instance;
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}
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/**
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* Create a ProcessControl depending on available extensions and the underlying OS.
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*
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* Check PosixProcessControl, WindowsProcessControl and UnixProcessControl, in that order.
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*
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* @return ProcessControlInterface
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*
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* @throws \Exception
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*/
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public static function createProcessControl()
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{
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switch (true) {
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case PosixProcessControl::isAvailable():
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return new PosixProcessControl();
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case UnixProcessControl::isAvailable():
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return new UnixProcessControl();
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}
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throw new \Exception("No ProcessControl implementation available.");
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}
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}
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