You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
407 lines
11 KiB
407 lines
11 KiB
<?php
|
|
|
|
/*
|
|
* This file is part of the Symfony package.
|
|
*
|
|
* (c) Fabien Potencier <fabien@symfony.com>
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
namespace Symfony\Component\Cache\Adapter;
|
|
|
|
use Psr\Cache\CacheItemInterface;
|
|
use Psr\Log\LoggerAwareInterface;
|
|
use Psr\Log\LoggerAwareTrait;
|
|
use Symfony\Component\Cache\CacheItem;
|
|
use Symfony\Component\Cache\Exception\InvalidArgumentException;
|
|
use Symfony\Component\Cache\ResettableInterface;
|
|
use Symfony\Contracts\Cache\CacheInterface;
|
|
|
|
/**
|
|
* An in-memory cache storage.
|
|
*
|
|
* Acts as a least-recently-used (LRU) storage when configured with a maximum number of items.
|
|
*
|
|
* @author Nicolas Grekas <p@tchwork.com>
|
|
*/
|
|
class ArrayAdapter implements AdapterInterface, CacheInterface, LoggerAwareInterface, ResettableInterface
|
|
{
|
|
use LoggerAwareTrait;
|
|
|
|
private $storeSerialized;
|
|
private $values = [];
|
|
private $expiries = [];
|
|
private $defaultLifetime;
|
|
private $maxLifetime;
|
|
private $maxItems;
|
|
|
|
private static $createCacheItem;
|
|
|
|
/**
|
|
* @param bool $storeSerialized Disabling serialization can lead to cache corruptions when storing mutable values but increases performance otherwise
|
|
*/
|
|
public function __construct(int $defaultLifetime = 0, bool $storeSerialized = true, float $maxLifetime = 0, int $maxItems = 0)
|
|
{
|
|
if (0 > $maxLifetime) {
|
|
throw new InvalidArgumentException(sprintf('Argument $maxLifetime must be positive, %F passed.', $maxLifetime));
|
|
}
|
|
|
|
if (0 > $maxItems) {
|
|
throw new InvalidArgumentException(sprintf('Argument $maxItems must be a positive integer, %d passed.', $maxItems));
|
|
}
|
|
|
|
$this->defaultLifetime = $defaultLifetime;
|
|
$this->storeSerialized = $storeSerialized;
|
|
$this->maxLifetime = $maxLifetime;
|
|
$this->maxItems = $maxItems;
|
|
self::$createCacheItem ?? self::$createCacheItem = \Closure::bind(
|
|
static function ($key, $value, $isHit) {
|
|
$item = new CacheItem();
|
|
$item->key = $key;
|
|
$item->value = $value;
|
|
$item->isHit = $isHit;
|
|
|
|
return $item;
|
|
},
|
|
null,
|
|
CacheItem::class
|
|
);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function get(string $key, callable $callback, float $beta = null, array &$metadata = null)
|
|
{
|
|
$item = $this->getItem($key);
|
|
$metadata = $item->getMetadata();
|
|
|
|
// ArrayAdapter works in memory, we don't care about stampede protection
|
|
if (\INF === $beta || !$item->isHit()) {
|
|
$save = true;
|
|
$item->set($callback($item, $save));
|
|
if ($save) {
|
|
$this->save($item);
|
|
}
|
|
}
|
|
|
|
return $item->get();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function delete(string $key): bool
|
|
{
|
|
return $this->deleteItem($key);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasItem($key)
|
|
{
|
|
if (\is_string($key) && isset($this->expiries[$key]) && $this->expiries[$key] > microtime(true)) {
|
|
if ($this->maxItems) {
|
|
// Move the item last in the storage
|
|
$value = $this->values[$key];
|
|
unset($this->values[$key]);
|
|
$this->values[$key] = $value;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
\assert('' !== CacheItem::validateKey($key));
|
|
|
|
return isset($this->expiries[$key]) && !$this->deleteItem($key);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getItem($key)
|
|
{
|
|
if (!$isHit = $this->hasItem($key)) {
|
|
$value = null;
|
|
|
|
if (!$this->maxItems) {
|
|
// Track misses in non-LRU mode only
|
|
$this->values[$key] = null;
|
|
}
|
|
} else {
|
|
$value = $this->storeSerialized ? $this->unfreeze($key, $isHit) : $this->values[$key];
|
|
}
|
|
|
|
return (self::$createCacheItem)($key, $value, $isHit);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getItems(array $keys = [])
|
|
{
|
|
\assert(self::validateKeys($keys));
|
|
|
|
return $this->generateItems($keys, microtime(true), self::$createCacheItem);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function deleteItem($key)
|
|
{
|
|
\assert('' !== CacheItem::validateKey($key));
|
|
unset($this->values[$key], $this->expiries[$key]);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function deleteItems(array $keys)
|
|
{
|
|
foreach ($keys as $key) {
|
|
$this->deleteItem($key);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function save(CacheItemInterface $item)
|
|
{
|
|
if (!$item instanceof CacheItem) {
|
|
return false;
|
|
}
|
|
$item = (array) $item;
|
|
$key = $item["\0*\0key"];
|
|
$value = $item["\0*\0value"];
|
|
$expiry = $item["\0*\0expiry"];
|
|
|
|
$now = microtime(true);
|
|
|
|
if (null !== $expiry) {
|
|
if (!$expiry) {
|
|
$expiry = \PHP_INT_MAX;
|
|
} elseif ($expiry <= $now) {
|
|
$this->deleteItem($key);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
if ($this->storeSerialized && null === $value = $this->freeze($value, $key)) {
|
|
return false;
|
|
}
|
|
if (null === $expiry && 0 < $this->defaultLifetime) {
|
|
$expiry = $this->defaultLifetime;
|
|
$expiry = $now + ($expiry > ($this->maxLifetime ?: $expiry) ? $this->maxLifetime : $expiry);
|
|
} elseif ($this->maxLifetime && (null === $expiry || $expiry > $now + $this->maxLifetime)) {
|
|
$expiry = $now + $this->maxLifetime;
|
|
}
|
|
|
|
if ($this->maxItems) {
|
|
unset($this->values[$key]);
|
|
|
|
// Iterate items and vacuum expired ones while we are at it
|
|
foreach ($this->values as $k => $v) {
|
|
if ($this->expiries[$k] > $now && \count($this->values) < $this->maxItems) {
|
|
break;
|
|
}
|
|
|
|
unset($this->values[$k], $this->expiries[$k]);
|
|
}
|
|
}
|
|
|
|
$this->values[$key] = $value;
|
|
$this->expiries[$key] = $expiry ?? \PHP_INT_MAX;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function saveDeferred(CacheItemInterface $item)
|
|
{
|
|
return $this->save($item);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function commit()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function clear(string $prefix = '')
|
|
{
|
|
if ('' !== $prefix) {
|
|
$now = microtime(true);
|
|
|
|
foreach ($this->values as $key => $value) {
|
|
if (!isset($this->expiries[$key]) || $this->expiries[$key] <= $now || 0 === strpos($key, $prefix)) {
|
|
unset($this->values[$key], $this->expiries[$key]);
|
|
}
|
|
}
|
|
|
|
if ($this->values) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
$this->values = $this->expiries = [];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns all cached values, with cache miss as null.
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getValues()
|
|
{
|
|
if (!$this->storeSerialized) {
|
|
return $this->values;
|
|
}
|
|
|
|
$values = $this->values;
|
|
foreach ($values as $k => $v) {
|
|
if (null === $v || 'N;' === $v) {
|
|
continue;
|
|
}
|
|
if (!\is_string($v) || !isset($v[2]) || ':' !== $v[1]) {
|
|
$values[$k] = serialize($v);
|
|
}
|
|
}
|
|
|
|
return $values;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function reset()
|
|
{
|
|
$this->clear();
|
|
}
|
|
|
|
private function generateItems(array $keys, float $now, \Closure $f): \Generator
|
|
{
|
|
foreach ($keys as $i => $key) {
|
|
if (!$isHit = isset($this->expiries[$key]) && ($this->expiries[$key] > $now || !$this->deleteItem($key))) {
|
|
$value = null;
|
|
|
|
if (!$this->maxItems) {
|
|
// Track misses in non-LRU mode only
|
|
$this->values[$key] = null;
|
|
}
|
|
} else {
|
|
if ($this->maxItems) {
|
|
// Move the item last in the storage
|
|
$value = $this->values[$key];
|
|
unset($this->values[$key]);
|
|
$this->values[$key] = $value;
|
|
}
|
|
|
|
$value = $this->storeSerialized ? $this->unfreeze($key, $isHit) : $this->values[$key];
|
|
}
|
|
unset($keys[$i]);
|
|
|
|
yield $key => $f($key, $value, $isHit);
|
|
}
|
|
|
|
foreach ($keys as $key) {
|
|
yield $key => $f($key, null, false);
|
|
}
|
|
}
|
|
|
|
private function freeze($value, string $key)
|
|
{
|
|
if (null === $value) {
|
|
return 'N;';
|
|
}
|
|
if (\is_string($value)) {
|
|
// Serialize strings if they could be confused with serialized objects or arrays
|
|
if ('N;' === $value || (isset($value[2]) && ':' === $value[1])) {
|
|
return serialize($value);
|
|
}
|
|
} elseif (!\is_scalar($value)) {
|
|
try {
|
|
$serialized = serialize($value);
|
|
} catch (\Exception $e) {
|
|
unset($this->values[$key]);
|
|
$type = get_debug_type($value);
|
|
$message = sprintf('Failed to save key "{key}" of type %s: %s', $type, $e->getMessage());
|
|
CacheItem::log($this->logger, $message, ['key' => $key, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);
|
|
|
|
return;
|
|
}
|
|
// Keep value serialized if it contains any objects or any internal references
|
|
if ('C' === $serialized[0] || 'O' === $serialized[0] || preg_match('/;[OCRr]:[1-9]/', $serialized)) {
|
|
return $serialized;
|
|
}
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
private function unfreeze(string $key, bool &$isHit)
|
|
{
|
|
if ('N;' === $value = $this->values[$key]) {
|
|
return null;
|
|
}
|
|
if (\is_string($value) && isset($value[2]) && ':' === $value[1]) {
|
|
try {
|
|
$value = unserialize($value);
|
|
} catch (\Exception $e) {
|
|
CacheItem::log($this->logger, 'Failed to unserialize key "{key}": '.$e->getMessage(), ['key' => $key, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);
|
|
$value = false;
|
|
}
|
|
if (false === $value) {
|
|
$value = null;
|
|
$isHit = false;
|
|
|
|
if (!$this->maxItems) {
|
|
$this->values[$key] = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
private function validateKeys(array $keys): bool
|
|
{
|
|
foreach ($keys as $key) {
|
|
if (!\is_string($key) || !isset($this->expiries[$key])) {
|
|
CacheItem::validateKey($key);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|