436 lines
12 KiB
PHP
436 lines
12 KiB
PHP
<?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\Adapter;
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use Psr\Cache\CacheItemInterface;
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use Psr\Cache\CacheItemPoolInterface;
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use Symfony\Component\Cache\CacheItem;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\PruneableInterface;
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use Symfony\Component\Cache\ResettableInterface;
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use Symfony\Component\Cache\Traits\ContractsTrait;
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use Symfony\Component\Cache\Traits\ProxyTrait;
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use Symfony\Component\VarExporter\VarExporter;
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use Symfony\Contracts\Cache\CacheInterface;
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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 PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInterface, ResettableInterface
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{
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use ContractsTrait;
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use ProxyTrait;
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private $file;
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private $keys;
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private $values;
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private static $createCacheItem;
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private static $valuesCache = [];
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/**
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* @param string $file The PHP file were values are cached
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* @param AdapterInterface $fallbackPool A pool to fallback on when an item is not hit
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*/
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public function __construct(string $file, AdapterInterface $fallbackPool)
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{
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$this->file = $file;
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$this->pool = $fallbackPool;
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self::$createCacheItem ?? self::$createCacheItem = \Closure::bind(
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static function ($key, $value, $isHit) {
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$item = new CacheItem();
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$item->key = $key;
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$item->value = $value;
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$item->isHit = $isHit;
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return $item;
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},
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null,
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CacheItem::class
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);
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}
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/**
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* This adapter takes advantage of how PHP stores arrays in its latest versions.
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*
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* @param string $file The PHP file were values are cached
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* @param CacheItemPoolInterface $fallbackPool A pool to fallback on when an item is not hit
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*
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* @return CacheItemPoolInterface
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*/
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public static function create(string $file, CacheItemPoolInterface $fallbackPool)
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{
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if (!$fallbackPool instanceof AdapterInterface) {
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$fallbackPool = new ProxyAdapter($fallbackPool);
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}
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return new static($file, $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(string $key, callable $callback, float $beta = null, array &$metadata = null)
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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($this->keys[$key])) {
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get_from_pool:
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if ($this->pool instanceof CacheInterface) {
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return $this->pool->get($key, $callback, $beta, $metadata);
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}
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return $this->doGet($this->pool, $key, $callback, $beta, $metadata);
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}
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$value = $this->values[$this->keys[$key]];
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if ('N;' === $value) {
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return null;
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}
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try {
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if ($value instanceof \Closure) {
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return $value();
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}
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} catch (\Throwable $e) {
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unset($this->keys[$key]);
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goto get_from_pool;
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}
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return $value;
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}
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/**
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* {@inheritdoc}
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*/
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public function getItem($key)
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{
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if (!\is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', get_debug_type($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($this->keys[$key])) {
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return $this->pool->getItem($key);
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}
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$value = $this->values[$this->keys[$key]];
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$isHit = true;
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if ('N;' === $value) {
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$value = null;
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} elseif ($value instanceof \Closure) {
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try {
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$value = $value();
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} catch (\Throwable $e) {
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$value = null;
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$isHit = false;
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}
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}
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return (self::$createCacheItem)($key, $value, $isHit);
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}
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/**
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* {@inheritdoc}
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*/
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public function getItems(array $keys = [])
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{
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foreach ($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.', get_debug_type($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);
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function hasItem($key)
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{
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if (!\is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', get_debug_type($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($this->keys[$key]) || $this->pool->hasItem($key);
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function deleteItem($key)
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{
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if (!\is_string($key)) {
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throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', get_debug_type($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($this->keys[$key]) && $this->pool->deleteItem($key);
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function deleteItems(array $keys)
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{
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$deleted = true;
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$fallbackKeys = [];
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foreach ($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.', get_debug_type($key)));
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}
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if (isset($this->keys[$key])) {
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$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 = $this->pool->deleteItems($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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* @return bool
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*/
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public function save(CacheItemInterface $item)
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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($this->keys[$item->getKey()]) && $this->pool->save($item);
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function saveDeferred(CacheItemInterface $item)
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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($this->keys[$item->getKey()]) && $this->pool->saveDeferred($item);
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function commit()
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{
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return $this->pool->commit();
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}
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/**
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* {@inheritdoc}
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*
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* @return bool
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*/
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public function clear(string $prefix = '')
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{
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$this->keys = $this->values = [];
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$cleared = @unlink($this->file) || !file_exists($this->file);
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unset(self::$valuesCache[$this->file]);
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if ($this->pool instanceof AdapterInterface) {
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return $this->pool->clear($prefix) && $cleared;
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}
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return $this->pool->clear() && $cleared;
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}
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/**
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* Store an array of cached values.
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*
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* @param array $values The cached values
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*
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* @return string[] A list of classes to preload on PHP 7.4+
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*/
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public function warmUp(array $values)
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{
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if (file_exists($this->file)) {
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if (!is_file($this->file)) {
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throw new InvalidArgumentException(sprintf('Cache path exists and is not a file: "%s".', $this->file));
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}
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if (!is_writable($this->file)) {
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throw new InvalidArgumentException(sprintf('Cache file is not writable: "%s".', $this->file));
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}
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} else {
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$directory = \dirname($this->file);
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if (!is_dir($directory) && !@mkdir($directory, 0777, true)) {
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throw new InvalidArgumentException(sprintf('Cache directory does not exist and cannot be created: "%s".', $directory));
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}
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if (!is_writable($directory)) {
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throw new InvalidArgumentException(sprintf('Cache directory is not writable: "%s".', $directory));
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}
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}
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$preload = [];
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$dumpedValues = '';
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$dumpedMap = [];
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$dump = <<<'EOF'
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<?php
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// This file has been auto-generated by the Symfony Cache Component.
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return [[
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EOF;
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foreach ($values as $key => $value) {
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CacheItem::validateKey(\is_int($key) ? (string) $key : $key);
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$isStaticValue = true;
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if (null === $value) {
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$value = "'N;'";
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} elseif (\is_object($value) || \is_array($value)) {
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try {
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$value = VarExporter::export($value, $isStaticValue, $preload);
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} catch (\Exception $e) {
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throw new InvalidArgumentException(sprintf('Cache key "%s" has non-serializable "%s" value.', $key, get_debug_type($value)), 0, $e);
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}
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} elseif (\is_string($value)) {
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// Wrap "N;" in a closure to not confuse it with an encoded `null`
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if ('N;' === $value) {
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$isStaticValue = false;
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}
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$value = var_export($value, true);
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} elseif (!is_scalar($value)) {
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throw new InvalidArgumentException(sprintf('Cache key "%s" has non-serializable "%s" value.', $key, get_debug_type($value)));
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} else {
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$value = var_export($value, true);
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}
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if (!$isStaticValue) {
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$value = str_replace("\n", "\n ", $value);
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$value = "static function () {\n return {$value};\n}";
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}
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$hash = hash('md5', $value);
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if (null === $id = $dumpedMap[$hash] ?? null) {
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$id = $dumpedMap[$hash] = \count($dumpedMap);
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$dumpedValues .= "{$id} => {$value},\n";
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}
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$dump .= var_export($key, true)." => {$id},\n";
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}
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$dump .= "\n], [\n\n{$dumpedValues}\n]];\n";
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$tmpFile = uniqid($this->file, true);
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file_put_contents($tmpFile, $dump);
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@chmod($tmpFile, 0666 & ~umask());
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unset($serialized, $value, $dump);
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@rename($tmpFile, $this->file);
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unset(self::$valuesCache[$this->file]);
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$this->initialize();
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return $preload;
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}
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/**
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* Load the cache file.
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*/
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private function initialize()
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{
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if (isset(self::$valuesCache[$this->file])) {
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$values = self::$valuesCache[$this->file];
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} elseif (!is_file($this->file)) {
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$this->keys = $this->values = [];
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return;
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} else {
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$values = self::$valuesCache[$this->file] = (include $this->file) ?: [[], []];
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}
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if (2 !== \count($values) || !isset($values[0], $values[1])) {
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$this->keys = $this->values = [];
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} else {
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[$this->keys, $this->values] = $values;
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}
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}
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private function generateItems(array $keys): \Generator
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{
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$f = self::$createCacheItem;
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$fallbackKeys = [];
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foreach ($keys as $key) {
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if (isset($this->keys[$key])) {
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$value = $this->values[$this->keys[$key]];
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if ('N;' === $value) {
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yield $key => $f($key, null, true);
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} elseif ($value instanceof \Closure) {
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try {
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yield $key => $f($key, $value(), true);
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} catch (\Throwable $e) {
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yield $key => $f($key, null, false);
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}
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} else {
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yield $key => $f($key, $value, true);
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}
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} else {
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$fallbackKeys[] = $key;
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}
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}
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if ($fallbackKeys) {
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yield from $this->pool->getItems($fallbackKeys);
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}
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}
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}
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