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260 lines
8 KiB
PHP
260 lines
8 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Cache\Simple;
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use Psr\SimpleCache\CacheInterface;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\Traits\PhpArrayTrait;
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use Symfony\Component\Cache\PruneableInterface;
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use Symfony\Component\Cache\ResettableInterface;
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/**
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* Caches items at warm up time using a PHP array that is stored in shared memory by OPCache since PHP 7.0.
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* Warmed up items are read-only and run-time discovered items are cached using a fallback adapter.
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*
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* @author Titouan Galopin <galopintitouan@gmail.com>
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class PhpArrayCache implements CacheInterface, PruneableInterface, ResettableInterface
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{
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use PhpArrayTrait;
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/**
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* @param string $file The PHP file were values are cached
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* @param CacheInterface $fallbackPool A pool to fallback on when an item is not hit
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*/
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public function __construct($file, CacheInterface $fallbackPool)
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{
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$this->file = $file;
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$this->pool = $fallbackPool;
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$this->zendDetectUnicode = ini_get('zend.detect_unicode');
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}
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/**
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* This adapter should only be used on PHP 7.0+ to take advantage of how PHP
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* stores arrays in its latest versions. This factory method decorates the given
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* fallback pool with this adapter only if the current PHP version is supported.
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*
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* @param string $file The PHP file were values are cached
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*
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* @return CacheInterface
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*/
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public static function create($file, CacheInterface $fallbackPool)
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{
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// Shared memory is available in PHP 7.0+ with OPCache enabled and in HHVM
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if ((\PHP_VERSION_ID >= 70000 && ini_get('opcache.enable')) || defined('HHVM_VERSION')) {
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return new static($file, $fallbackPool);
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}
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return $fallbackPool;
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}
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/**
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* {@inheritdoc}
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*/
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public function get($key, $default = null)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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if (!isset($this->values[$key])) {
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return $this->pool->get($key, $default);
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}
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$value = $this->values[$key];
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if ('N;' === $value) {
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$value = null;
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} elseif (is_string($value) && isset($value[2]) && ':' === $value[1]) {
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try {
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$e = null;
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$value = unserialize($value);
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} catch (\Error $e) {
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} catch (\Exception $e) {
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}
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if (null !== $e) {
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return $default;
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}
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}
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return $value;
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}
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/**
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* {@inheritdoc}
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*/
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public function getMultiple($keys, $default = null)
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{
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if ($keys instanceof \Traversable) {
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$keys = iterator_to_array($keys, false);
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} elseif (!is_array($keys)) {
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throw new InvalidArgumentException(sprintf('Cache keys must be array or Traversable, "%s" given', is_object($keys) ? get_class($keys) : gettype($keys)));
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}
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foreach ($keys as $key) {
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return $this->generateItems($keys, $default);
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}
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/**
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* {@inheritdoc}
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*/
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public function has($key)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return isset($this->values[$key]) || $this->pool->has($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function delete($key)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return !isset($this->values[$key]) && $this->pool->delete($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function deleteMultiple($keys)
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{
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if (!is_array($keys) && !$keys instanceof \Traversable) {
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throw new InvalidArgumentException(sprintf('Cache keys must be array or Traversable, "%s" given', is_object($keys) ? get_class($keys) : gettype($keys)));
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}
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$deleted = true;
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$fallbackKeys = array();
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foreach ($keys as $key) {
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (isset($this->values[$key])) {
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$deleted = false;
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} else {
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$fallbackKeys[] = $key;
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}
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}
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if (null === $this->values) {
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$this->initialize();
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}
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if ($fallbackKeys) {
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$deleted = $this->pool->deleteMultiple($fallbackKeys) && $deleted;
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}
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return $deleted;
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}
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/**
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* {@inheritdoc}
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*/
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public function set($key, $value, $ttl = null)
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{
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if (!is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (null === $this->values) {
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$this->initialize();
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}
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return !isset($this->values[$key]) && $this->pool->set($key, $value, $ttl);
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}
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/**
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* {@inheritdoc}
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*/
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public function setMultiple($values, $ttl = null)
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{
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if (!is_array($values) && !$values instanceof \Traversable) {
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throw new InvalidArgumentException(sprintf('Cache values must be array or Traversable, "%s" given', is_object($values) ? get_class($values) : gettype($values)));
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}
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$saved = true;
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$fallbackValues = array();
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foreach ($values as $key => $value) {
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if (!is_string($key) && !is_int($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', is_object($key) ? get_class($key) : gettype($key)));
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}
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if (isset($this->values[$key])) {
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$saved = false;
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} else {
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$fallbackValues[$key] = $value;
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}
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}
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if ($fallbackValues) {
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$saved = $this->pool->setMultiple($fallbackValues, $ttl) && $saved;
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}
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return $saved;
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}
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private function generateItems(array $keys, $default)
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{
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$fallbackKeys = array();
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foreach ($keys as $key) {
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if (isset($this->values[$key])) {
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$value = $this->values[$key];
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if ('N;' === $value) {
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yield $key => null;
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} elseif (is_string($value) && isset($value[2]) && ':' === $value[1]) {
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try {
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yield $key => unserialize($value);
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} catch (\Error $e) {
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yield $key => $default;
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} catch (\Exception $e) {
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yield $key => $default;
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}
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} else {
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yield $key => $value;
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}
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} else {
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$fallbackKeys[] = $key;
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}
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}
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if ($fallbackKeys) {
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foreach ($this->pool->getMultiple($fallbackKeys, $default) as $key => $item) {
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yield $key => $item;
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}
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}
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}
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}
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