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📝 Editando: DebugEngine.php

<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 *
 */
namespace DebugKit\Cache\Engine;

use Cake\Cache\CacheEngine;
use Cake\Cache\CacheRegistry;
use DebugKit\DebugTimer;

/**
 * A spying proxy for cache engines.
 *
 * Used by the CachePanel to wrap and track metrics related to caching.
 */
class DebugEngine extends CacheEngine
{

/**
     * Proxied cache engine config.
     *
     * @var mixed
     */
    protected $_config;

/**
     * Proxied engine
     *
     * @var mixed
     */
    protected $_engine;

/**
     * Hit/miss metrics.
     *
     * @var mixed
     */
    protected $_metrics = [
        'write' => 0,
        'delete' => 0,
        'read' => 0,
        'hit' => 0,
        'miss' => 0,
    ];

/**
     * Constructor
     *
     * @param mixed $config Config data or the proxied adapter.
     */
    public function __construct($config)
    {
        $this->_config = $config;
    }

/**
     * Initialize the proxied Cache Engine
     *
     * @param array $config Array of setting for the engine.
     * @return bool True, this engine cannot fail to initialize.
     */
    public function init(array $config = [])
    {
        if (is_object($this->_config)) {
            $this->_engine = $this->_config;

return true;
        }
        $registry = new CacheRegistry;
        $this->_engine = $registry->load('spies', $this->_config);
        unset($registry);

return true;
    }

/**
     * Get the internal engine
     *
     * @return \Cake\Cache\CacheEngine
     */
    public function engine()
    {
        return $this->_engine;
    }

/**
     * Get the metrics for this object.
     *
     * @return array
     */
    public function metrics()
    {
        return $this->_metrics;
    }

/**
     * Track a metric.
     *
     * @param string $metric The metric to increment.
     * @return void
     */
    protected function _track($metric)
    {
        $this->_metrics[$metric]++;
    }

/**
     * {@inheritDoc}
     */
    public function write($key, $value)
    {
        $this->_track('write');
        DebugTimer::start('Cache.write ' . $key);
        $result = $this->_engine->write($key, $value);
        DebugTimer::stop('Cache.write ' . $key);

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function writeMany($data)
    {
        $this->_track('write');
        DebugTimer::start('Cache.writeMany');
        $result = $this->_engine->writeMany($data);
        DebugTimer::stop('Cache.writeMany');

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function read($key)
    {
        $this->_track('read');
        DebugTimer::start('Cache.read ' . $key);
        $result = $this->_engine->read($key);
        DebugTimer::stop('Cache.read ' . $key);
        $metric = 'hit';
        if ($result === false) {
            $metric = 'miss';
        }
        $this->_track($metric);

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function readMany($data)
    {
        $this->_track('read');
        DebugTimer::start('Cache.readMany');
        $result = $this->_engine->readMany($data);
        DebugTimer::stop('Cache.readMany');

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function increment($key, $offset = 1)
    {
        $this->_track('write');
        DebugTimer::start('Cache.increment ' . $key);
        $result = $this->_engine->increment($key, $offset);
        DebugTimer::stop('Cache.increment ' . $key);

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function decrement($key, $offset = 1)
    {
        $this->_track('write');
        DebugTimer::start('Cache.decrement ' . $key);
        $result = $this->_engine->decrement($key, $offset);
        DebugTimer::stop('Cache.decrement ' . $key);

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function delete($key)
    {
        $this->_track('delete');
        DebugTimer::start('Cache.delete ' . $key);
        $result = $this->_engine->delete($key);
        DebugTimer::stop('Cache.delete ' . $key);

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function deleteMany($data)
    {
        $this->_track('delete');
        DebugTimer::start('Cache.deleteMany');
        $result = $this->_engine->deleteMany($data);
        DebugTimer::stop('Cache.deleteMany');

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function clear($check)
    {
        $this->_track('delete');
        DebugTimer::start('Cache.clear');
        $result = $this->_engine->clear($check);
        DebugTimer::stop('Cache.clear');

return $result;
    }

/**
     * {@inheritDoc}
     */
    public function groups()
    {
        return $this->_engine->groups();
    }

/**
     * Return the proxied configuration data.
     *
     * This method uses func_get_args() as not doing so confuses the
     * proxied class.
     *
     * @deprecated 3.6.0 use setConfig()/getConfig() instead.
     * @param string $key The key to set/read.
     * @param mixed $value The value to set.
     * @param bool $merge Whether or not configuration should be merged.
     * @return mixed
     */
    public function config($key = null, $value = null, $merge = true)
    {
        return call_user_func_array([$this->_engine, 'config'], func_get_args());
    }

/**
     * Returns the config.
     *
     * @param string|null $key The key to get or null for the whole config.
     * @param mixed $default The return value when the key does not exist.
     * @return mixed Config value being read.
     */
    public function getConfig($key = null, $default = null)
    {
        return $this->_engine->getConfig($key, $default);
    }

/**
     * Sets the config.
     *
     * @param string|array $key The key to set, or a complete array of configs.
     * @param mixed|null $value The value to set.
     * @param bool $merge Whether to recursively merge or overwrite existing config, defaults to true.
     * @return $this
     * @throws \Cake\Core\Exception\Exception When trying to set a key that is invalid.
     */
    public function setConfig($key, $value = null, $merge = true)
    {
        return $this->_engine->setConfig($key, $value, $merge);
    }

/**
     * {@inheritDoc}
     */
    public function clearGroup($group)
    {
        $this->_track('delete');
        DebugTimer::start('Cache.clearGroup ' . $group);
        $result = $this->_engine->clearGroup($group);
        DebugTimer::stop('Cache.clearGroup ' . $group);

return $result;
    }

/**
     * Magic __toString() method to get the CacheEngine's name
     *
     * @return string Returns the CacheEngine's name
     */
    public function __toString()
    {
        if (!empty($this->_engine)) {
            list($ns, $class) = namespaceSplit(get_class($this->_engine));

return str_replace('Engine', '', $class);
        }

return $this->_config['className'];
    }
}

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📝 Editando: DebugEngine.php