Viewing file:  TagAwareAdapter.php (11.12 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* 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\Cache\InvalidArgumentException;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use Symfony\Component\Cache\CacheItem;
use Symfony\Component\Cache\PruneableInterface;
use Symfony\Component\Cache\ResettableInterface;
use Symfony\Component\Cache\Traits\ContractsTrait;
use Symfony\Component\Cache\Traits\ProxyTrait;
use Symfony\Contracts\Cache\TagAwareCacheInterface;
/**
* @author Nicolas Grekas <[email protected]>
*/
class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterface, PruneableInterface, ResettableInterface, LoggerAwareInterface
{
use ContractsTrait;
use LoggerAwareTrait;
use ProxyTrait;
public const TAGS_PREFIX = "\0tags\0";
private $deferred = [];
private $tags;
private $knownTagVersions = [];
private $knownTagVersionsTtl;
private static $createCacheItem;
private static $setCacheItemTags;
private static $getTagsByKey;
private static $saveTags;
public function __construct(AdapterInterface $itemsPool, AdapterInterface $tagsPool = null, float $knownTagVersionsTtl = 0.15)
{
$this->pool = $itemsPool;
$this->tags = $tagsPool ?: $itemsPool;
$this->knownTagVersionsTtl = $knownTagVersionsTtl;
self::$createCacheItem ?? self::$createCacheItem = \Closure::bind(
static function ($key, $value, CacheItem $protoItem) {
$item = new CacheItem();
$item->key = $key;
$item->value = $value;
$item->expiry = $protoItem->expiry;
$item->poolHash = $protoItem->poolHash;
return $item;
},
null,
CacheItem::class
);
self::$setCacheItemTags ?? self::$setCacheItemTags = \Closure::bind(
static function (CacheItem $item, $key, array &$itemTags) {
$item->isTaggable = true;
if (!$item->isHit) {
return $item;
}
if (isset($itemTags[$key])) {
foreach ($itemTags[$key] as $tag => $version) {
$item->metadata[CacheItem::METADATA_TAGS][$tag] = $tag;
}
unset($itemTags[$key]);
} else {
$item->value = null;
$item->isHit = false;
}
return $item;
},
null,
CacheItem::class
);
self::$getTagsByKey ?? self::$getTagsByKey = \Closure::bind(
static function ($deferred) {
$tagsByKey = [];
foreach ($deferred as $key => $item) {
$tagsByKey[$key] = $item->newMetadata[CacheItem::METADATA_TAGS] ?? [];
$item->metadata = $item->newMetadata;
}
return $tagsByKey;
},
null,
CacheItem::class
);
self::$saveTags ?? self::$saveTags = \Closure::bind(
static function (AdapterInterface $tagsAdapter, array $tags) {
ksort($tags);
foreach ($tags as $v) {
$v->expiry = 0;
$tagsAdapter->saveDeferred($v);
}
return $tagsAdapter->commit();
},
null,
CacheItem::class
);
}
/**
* {@inheritdoc}
*/
public function invalidateTags(array $tags): bool
{
$ids = [];
foreach ($tags as $tag) {
\assert('' !== CacheItem::validateKey($tag));
unset($this->knownTagVersions[$tag]);
$ids[] = $tag.static::TAGS_PREFIX;
}
return !$tags || $this->tags->deleteItems($ids);
}
/**
* {@inheritdoc}
*/
public function hasItem(mixed $key): bool
{
if (\is_string($key) && isset($this->deferred[$key])) {
$this->commit();
}
if (!$this->pool->hasItem($key)) {
return false;
}
$itemTags = $this->pool->getItem(static::TAGS_PREFIX.$key);
if (!$itemTags->isHit()) {
return false;
}
if (!$itemTags = $itemTags->get()) {
return true;
}
foreach ($this->getTagVersions([$itemTags]) as $tag => $version) {
if ($itemTags[$tag] !== $version) {
return false;
}
}
return true;
}
/**
* {@inheritdoc}
*/
public function getItem(mixed $key): CacheItem
{
foreach ($this->getItems([$key]) as $item) {
return $item;
}
return null;
}
/**
* {@inheritdoc}
*/
public function getItems(array $keys = []): iterable
{
$tagKeys = [];
$commit = false;
foreach ($keys as $key) {
if ('' !== $key && \is_string($key)) {
$commit = $commit || isset($this->deferred[$key]);
$key = static::TAGS_PREFIX.$key;
$tagKeys[$key] = $key;
}
}
if ($commit) {
$this->commit();
}
try {
$items = $this->pool->getItems($tagKeys + $keys);
} catch (InvalidArgumentException $e) {
$this->pool->getItems($keys); // Should throw an exception
throw $e;
}
return $this->generateItems($items, $tagKeys);
}
/**
* {@inheritdoc}
*/
public function clear(string $prefix = ''): bool
{
if ('' !== $prefix) {
foreach ($this->deferred as $key => $item) {
if (str_starts_with($key, $prefix)) {
unset($this->deferred[$key]);
}
}
} else {
$this->deferred = [];
}
if ($this->pool instanceof AdapterInterface) {
return $this->pool->clear($prefix);
}
return $this->pool->clear();
}
/**
* {@inheritdoc}
*/
public function deleteItem(mixed $key): bool
{
return $this->deleteItems([$key]);
}
/**
* {@inheritdoc}
*/
public function deleteItems(array $keys): bool
{
foreach ($keys as $key) {
if ('' !== $key && \is_string($key)) {
$keys[] = static::TAGS_PREFIX.$key;
}
}
return $this->pool->deleteItems($keys);
}
/**
* {@inheritdoc}
*/
public function save(CacheItemInterface $item): bool
{
if (!$item instanceof CacheItem) {
return false;
}
$this->deferred[$item->getKey()] = $item;
return $this->commit();
}
/**
* {@inheritdoc}
*/
public function saveDeferred(CacheItemInterface $item): bool
{
if (!$item instanceof CacheItem) {
return false;
}
$this->deferred[$item->getKey()] = $item;
return true;
}
/**
* {@inheritdoc}
*/
public function commit(): bool
{
if (!$this->deferred) {
return true;
}
$ok = true;
foreach ($this->deferred as $key => $item) {
if (!$this->pool->saveDeferred($item)) {
unset($this->deferred[$key]);
$ok = false;
}
}
$items = $this->deferred;
$tagsByKey = (self::$getTagsByKey)($items);
$this->deferred = [];
$tagVersions = $this->getTagVersions($tagsByKey);
$f = self::$createCacheItem;
foreach ($tagsByKey as $key => $tags) {
$this->pool->saveDeferred($f(static::TAGS_PREFIX.$key, array_intersect_key($tagVersions, $tags), $items[$key]));
}
return $this->pool->commit() && $ok;
}
/**
* @return array
*/
public function __sleep()
{
throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
}
public function __wakeup()
{
throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
}
public function __destruct()
{
$this->commit();
}
private function generateItems(iterable $items, array $tagKeys): \Generator
{
$bufferedItems = $itemTags = [];
$f = self::$setCacheItemTags;
foreach ($items as $key => $item) {
if (!$tagKeys) {
yield $key => $f($item, static::TAGS_PREFIX.$key, $itemTags);
continue;
}
if (!isset($tagKeys[$key])) {
$bufferedItems[$key] = $item;
continue;
}
unset($tagKeys[$key]);
if ($item->isHit()) {
$itemTags[$key] = $item->get() ?: [];
}
if (!$tagKeys) {
$tagVersions = $this->getTagVersions($itemTags);
foreach ($itemTags as $key => $tags) {
foreach ($tags as $tag => $version) {
if ($tagVersions[$tag] !== $version) {
unset($itemTags[$key]);
continue 2;
}
}
}
$tagVersions = $tagKeys = null;
foreach ($bufferedItems as $key => $item) {
yield $key => $f($item, static::TAGS_PREFIX.$key, $itemTags);
}
$bufferedItems = null;
}
}
}
private function getTagVersions(array $tagsByKey): array
{
$tagVersions = [];
$fetchTagVersions = false;
foreach ($tagsByKey as $tags) {
$tagVersions += $tags;
foreach ($tags as $tag => $version) {
if ($tagVersions[$tag] !== $version) {
unset($this->knownTagVersions[$tag]);
}
}
}
if (!$tagVersions) {
return [];
}
$now = microtime(true);
$tags = [];
foreach ($tagVersions as $tag => $version) {
$tags[$tag.static::TAGS_PREFIX] = $tag;
if ($fetchTagVersions || ($this->knownTagVersions[$tag][1] ?? null) !== $version || $now - $this->knownTagVersions[$tag][0] >= $this->knownTagVersionsTtl) {
// reuse previously fetched tag versions up to the ttl
$fetchTagVersions = true;
}
}
if (!$fetchTagVersions) {
return $tagVersions;
}
$newTags = [];
$newVersion = null;
foreach ($this->tags->getItems(array_keys($tags)) as $tag => $version) {
if (!$version->isHit()) {
$newTags[$tag] = $version->set($newVersion ?? $newVersion = random_int(\PHP_INT_MIN, \PHP_INT_MAX));
}
$tagVersions[$tag = $tags[$tag]] = $version->get();
$this->knownTagVersions[$tag] = [$now, $tagVersions[$tag]];
}
if ($newTags) {
(self::$saveTags)($this->tags, $newTags);
}
return $tagVersions;
}
}
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