117 lines
2.6 KiB
PHP
117 lines
2.6 KiB
PHP
<?php
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/**
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* Ion
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*
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* Building blocks for web development
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*
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* @package Ion
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2015 - 2016
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* @license MIT
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*/
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namespace Aviat\Ion\Cache;
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use Aviat\Ion\ConfigInterface;
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use Aviat\Ion\Cache\Driver\DriverInterface;
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/**
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* Class proxying cached and fresh values from the selected cache driver
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*/
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class CacheManager implements CacheInterface {
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/**
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* @var DriverInterface
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*/
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protected $driver;
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/**
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* Retrieve the appropriate driver from the container
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*
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* @param ConfigInterface $config The configuration management class
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*/
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public function __construct(ConfigInterface $config)
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{
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$driverConf = $config->get('cache_driver');
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if (empty($driverConf))
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{
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$driverConf = 'NullDriver';
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}
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$driverClass = __NAMESPACE__ . "\\Driver\\{$driverConf}";
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$driver = new $driverClass($config);
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$this->driver = $driver;
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}
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/**
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* Retrieve a cached value if it exists, otherwise, get the value
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* from the passed arguments
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*
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* @param object $object - object to retrieve fresh value from
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* @param string $method - method name to call
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* @param [array] $args - the arguments to pass to the retrieval method
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* @return mixed - the cached or fresh data
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*/
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public function get($object, $method, array $args=[])
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{
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$hash = $this->generateHashForMethod($object, $method, $args);
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$data = $this->driver->get($hash);
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if (empty($data))
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{
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$data = call_user_func_array([$object, $method], $args);
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$this->driver->set($hash, $data);
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}
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return $data;
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}
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/**
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* Retrieve a fresh value from the method, and update the cache
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* @param object $object - object to retrieve fresh value from
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* @param string $method - method name to call
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* @param [array] $args - the arguments to pass to the retrieval method
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* @return mixed - the fresh data
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*/
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public function getFresh($object, $method, array $args=[])
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{
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$hash = $this->generateHashForMethod($object, $method, $args);
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$data = call_user_func_array([$object, $method], $args);
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$this->driver->set($hash, $data);
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return $data;
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}
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/**
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* Clear the entire cache
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*
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* @return void
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*/
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public function purge()
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{
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$this->driver->invalidateAll();
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}
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/**
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* Generate a hash as a cache key from the current method call
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*
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* @param object $object
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* @param string $method
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* @param array $args
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* @return string
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*/
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protected function generateHashForMethod($object, $method, array $args)
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{
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$classname = get_class($object);
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$keyObj = [
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'class' => $classname,
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'method' => $method,
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'args' => $args,
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];
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$hash = sha1(json_encode($keyObj));
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return $hash;
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}
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}
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// End of CacheManager.php
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