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<?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\LoggerInterface;
use Symfony\Component\Cache\CacheItem;
use Symfony\Component\Cache\Exception\InvalidArgumentException;
use Symfony\Component\Cache\ResettableInterface;
use Symfony\Component\Cache\Traits\AbstractTrait;
/**
* @author Nicolas Grekas <p@tchwork.com>
*/
abstract class AbstractAdapter implements AdapterInterface, LoggerAwareInterface, ResettableInterface
{
/**
* @internal
*/
const NS_SEPARATOR = ':';
use AbstractTrait;
private static $apcuSupported;
private static $phpFilesSupported;
private $createCacheItem;
private $mergeByLifetime;
/**
* @param string $namespace
* @param int $defaultLifetime
*/
protected function __construct($namespace = '', $defaultLifetime = 0)
{
$this->namespace = '' === $namespace ? '' : CacheItem::validateKey($namespace).static::NS_SEPARATOR;
if (null !== $this->maxIdLength && \strlen($namespace) > $this->maxIdLength - 24) {
throw new InvalidArgumentException(sprintf('Namespace must be %d chars max, %d given ("%s").', $this->maxIdLength - 24, \strlen($namespace), $namespace));
}
$this->createCacheItem = \Closure::bind(
static function ($key, $value, $isHit) {
$item = new CacheItem();
$item->key = $key;
$item->value = $value;
$item->isHit = $isHit;
return $item;
},
null,
CacheItem::class
);
$getId = function ($key) { return $this->getId((string) $key); };
$this->mergeByLifetime = \Closure::bind(
static function ($deferred, $namespace, &$expiredIds) use ($getId, $defaultLifetime) {
$byLifetime = [];
$now = time();
$expiredIds = [];
foreach ($deferred as $key => $item) {
if (null === $item->expiry) {
$byLifetime[0 < $defaultLifetime ? $defaultLifetime : 0][$getId($key)] = $item->value;
} elseif (0 === $item->expiry) {
$byLifetime[0][$getId($key)] = $item->value;
} elseif ($item->expiry > $now) {
$byLifetime[$item->expiry - $now][$getId($key)] = $item->value;
} else {
$expiredIds[] = $getId($key);
}
}
return $byLifetime;
},
null,
CacheItem::class
);
}
/**
* @param string $namespace
* @param int $defaultLifetime
* @param string $version
* @param string $directory
*
* @return AdapterInterface
*/
public static function createSystemCache($namespace, $defaultLifetime, $version, $directory, LoggerInterface $logger = null)
{
if (null === self::$apcuSupported) {
self::$apcuSupported = ApcuAdapter::isSupported();
}
if (!self::$apcuSupported && null === self::$phpFilesSupported) {
self::$phpFilesSupported = PhpFilesAdapter::isSupported();
}
if (self::$phpFilesSupported) {
$opcache = new PhpFilesAdapter($namespace, $defaultLifetime, $directory);
if (null !== $logger) {
$opcache->setLogger($logger);
}
return $opcache;
}
$fs = new FilesystemAdapter($namespace, $defaultLifetime, $directory);
if (null !== $logger) {
$fs->setLogger($logger);
}
if (!self::$apcuSupported || (\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && !filter_var(ini_get('apc.enable_cli'), \FILTER_VALIDATE_BOOLEAN))) {
return $fs;
}
$apcu = new ApcuAdapter($namespace, (int) $defaultLifetime / 5, $version);
if (null !== $logger) {
$apcu->setLogger($logger);
}
return new ChainAdapter([$apcu, $fs]);
}
public static function createConnection($dsn, array $options = [])
{
if (!\is_string($dsn)) {
throw new InvalidArgumentException(sprintf('The "%s()" method expect argument #1 to be string, "%s" given.', __METHOD__, \gettype($dsn)));
}
if (0 === strpos($dsn, 'redis://')) {
return RedisAdapter::createConnection($dsn, $options);
}
if (0 === strpos($dsn, 'memcached://')) {
return MemcachedAdapter::createConnection($dsn, $options);
}
throw new InvalidArgumentException(sprintf('Unsupported DSN: "%s".', $dsn));
}
/**
* {@inheritdoc}
*/
public function getItem($key)
{
if ($this->deferred) {
$this->commit();
}
$id = $this->getId($key);
$f = $this->createCacheItem;
$isHit = false;
$value = null;
try {
foreach ($this->doFetch([$id]) as $value) {
$isHit = true;
}
} catch (\Exception $e) {
CacheItem::log($this->logger, 'Failed to fetch key "{key}"', ['key' => $key, 'exception' => $e]);
}
return $f($key, $value, $isHit);
}
/**
* {@inheritdoc}
*/
public function getItems(array $keys = [])
{
if ($this->deferred) {
$this->commit();
}
$ids = [];
foreach ($keys as $key) {
$ids[] = $this->getId($key);
}
try {
$items = $this->doFetch($ids);
} catch (\Exception $e) {
CacheItem::log($this->logger, 'Failed to fetch requested items', ['keys' => $keys, 'exception' => $e]);
$items = [];
}
$ids = array_combine($ids, $keys);
return $this->generateItems($items, $ids);
}
/**
* {@inheritdoc}
*/
public function save(CacheItemInterface $item)
{
if (!$item instanceof CacheItem) {
return false;
}
$this->deferred[$item->getKey()] = $item;
return $this->commit();
}
/**
* {@inheritdoc}
*/
public function saveDeferred(CacheItemInterface $item)
{
if (!$item instanceof CacheItem) {
return false;
}
$this->deferred[$item->getKey()] = $item;
return true;
}
/**
* {@inheritdoc}
*/
public function commit()
{
$ok = true;
$byLifetime = $this->mergeByLifetime;
$byLifetime = $byLifetime($this->deferred, $this->namespace, $expiredIds);
$retry = $this->deferred = [];
if ($expiredIds) {
$this->doDelete($expiredIds);
}
foreach ($byLifetime as $lifetime => $values) {
try {
$e = $this->doSave($values, $lifetime);
} catch (\Exception $e) {
}
if (true === $e || [] === $e) {
continue;
}
if (\is_array($e) || 1 === \count($values)) {
foreach (\is_array($e) ? $e : array_keys($values) as $id) {
$ok = false;
$v = $values[$id];
$type = \is_object($v) ? \get_class($v) : \gettype($v);
CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', ['key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null]);
}
} else {
foreach ($values as $id => $v) {
$retry[$lifetime][] = $id;
}
}
}
// When bulk-save failed, retry each item individually
foreach ($retry as $lifetime => $ids) {
foreach ($ids as $id) {
try {
$v = $byLifetime[$lifetime][$id];
$e = $this->doSave([$id => $v], $lifetime);
} catch (\Exception $e) {
}
if (true === $e || [] === $e) {
continue;
}
$ok = false;
$type = \is_object($v) ? \get_class($v) : \gettype($v);
CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', ['key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null]);
}
}
return $ok;
}
public function __sleep()
{
throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
}
public function __wakeup()
{
throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
}
public function __destruct()
{
if ($this->deferred) {
$this->commit();
}
}
private function generateItems($items, &$keys)
{
$f = $this->createCacheItem;
try {
foreach ($items as $id => $value) {
if (!isset($keys[$id])) {
$id = key($keys);
}
$key = $keys[$id];
unset($keys[$id]);
yield $key => $f($key, $value, true);
}
} catch (\Exception $e) {
CacheItem::log($this->logger, 'Failed to fetch requested items', ['keys' => array_values($keys), 'exception' => $e]);
}
foreach ($keys as $key) {
yield $key => $f($key, null, false);
}
}
}