Viewing file:  CachedReader.php (6.88 KB) -rwxrwxrwx
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<?php
namespace Doctrine\Common\Annotations;
use Doctrine\Common\Cache\Cache;
use ReflectionClass;
use ReflectionMethod;
use ReflectionProperty;
use function array_map;
use function array_merge;
use function assert;
use function filemtime;
use function max;
use function time;
/**
* A cache aware annotation reader.
*/
final class CachedReader implements Reader
{
/** @var Reader */
private $delegate;
/** @var Cache */
private $cache;
/** @var bool */
private $debug;
/** @var array<string, array<object>> */
private $loadedAnnotations = [];
/** @var int[] */
private $loadedFilemtimes = [];
/**
* @param bool $debug
*/
public function __construct(Reader $reader, Cache $cache, $debug = false)
{
$this->delegate = $reader;
$this->cache = $cache;
$this->debug = (bool) $debug;
}
/**
* {@inheritDoc}
*/
public function getClassAnnotations(ReflectionClass $class)
{
$cacheKey = $class->getName();
if (isset($this->loadedAnnotations[$cacheKey])) {
return $this->loadedAnnotations[$cacheKey];
}
$annots = $this->fetchFromCache($cacheKey, $class);
if ($annots === false) {
$annots = $this->delegate->getClassAnnotations($class);
$this->saveToCache($cacheKey, $annots);
}
return $this->loadedAnnotations[$cacheKey] = $annots;
}
/**
* {@inheritDoc}
*/
public function getClassAnnotation(ReflectionClass $class, $annotationName)
{
foreach ($this->getClassAnnotations($class) as $annot) {
if ($annot instanceof $annotationName) {
return $annot;
}
}
return null;
}
/**
* {@inheritDoc}
*/
public function getPropertyAnnotations(ReflectionProperty $property)
{
$class = $property->getDeclaringClass();
$cacheKey = $class->getName() . '$' . $property->getName();
if (isset($this->loadedAnnotations[$cacheKey])) {
return $this->loadedAnnotations[$cacheKey];
}
$annots = $this->fetchFromCache($cacheKey, $class);
if ($annots === false) {
$annots = $this->delegate->getPropertyAnnotations($property);
$this->saveToCache($cacheKey, $annots);
}
return $this->loadedAnnotations[$cacheKey] = $annots;
}
/**
* {@inheritDoc}
*/
public function getPropertyAnnotation(ReflectionProperty $property, $annotationName)
{
foreach ($this->getPropertyAnnotations($property) as $annot) {
if ($annot instanceof $annotationName) {
return $annot;
}
}
return null;
}
/**
* {@inheritDoc}
*/
public function getMethodAnnotations(ReflectionMethod $method)
{
$class = $method->getDeclaringClass();
$cacheKey = $class->getName() . '#' . $method->getName();
if (isset($this->loadedAnnotations[$cacheKey])) {
return $this->loadedAnnotations[$cacheKey];
}
$annots = $this->fetchFromCache($cacheKey, $class);
if ($annots === false) {
$annots = $this->delegate->getMethodAnnotations($method);
$this->saveToCache($cacheKey, $annots);
}
return $this->loadedAnnotations[$cacheKey] = $annots;
}
/**
* {@inheritDoc}
*/
public function getMethodAnnotation(ReflectionMethod $method, $annotationName)
{
foreach ($this->getMethodAnnotations($method) as $annot) {
if ($annot instanceof $annotationName) {
return $annot;
}
}
return null;
}
/**
* Clears loaded annotations.
*
* @return void
*/
public function clearLoadedAnnotations()
{
$this->loadedAnnotations = [];
$this->loadedFilemtimes = [];
}
/**
* Fetches a value from the cache.
*
* @param string $cacheKey The cache key.
*
* @return mixed The cached value or false when the value is not in cache.
*/
private function fetchFromCache($cacheKey, ReflectionClass $class)
{
$data = $this->cache->fetch($cacheKey);
if ($data !== false) {
if (! $this->debug || $this->isCacheFresh($cacheKey, $class)) {
return $data;
}
}
return false;
}
/**
* Saves a value to the cache.
*
* @param string $cacheKey The cache key.
* @param mixed $value The value.
*
* @return void
*/
private function saveToCache($cacheKey, $value)
{
$this->cache->save($cacheKey, $value);
if (! $this->debug) {
return;
}
$this->cache->save('[C]' . $cacheKey, time());
}
/**
* Checks if the cache is fresh.
*
* @param string $cacheKey
*
* @return bool
*/
private function isCacheFresh($cacheKey, ReflectionClass $class)
{
$lastModification = $this->getLastModification($class);
if ($lastModification === 0) {
return true;
}
return $this->cache->fetch('[C]' . $cacheKey) >= $lastModification;
}
/**
* Returns the time the class was last modified, testing traits and parents
*/
private function getLastModification(ReflectionClass $class): int
{
$filename = $class->getFileName();
if (isset($this->loadedFilemtimes[$filename])) {
return $this->loadedFilemtimes[$filename];
}
$parent = $class->getParentClass();
$lastModification = max(array_merge(
[$filename ? filemtime($filename) : 0],
array_map(function (ReflectionClass $reflectionTrait): int {
return $this->getTraitLastModificationTime($reflectionTrait);
}, $class->getTraits()),
array_map(function (ReflectionClass $class): int {
return $this->getLastModification($class);
}, $class->getInterfaces()),
$parent ? [$this->getLastModification($parent)] : []
));
assert($lastModification !== false);
return $this->loadedFilemtimes[$filename] = $lastModification;
}
private function getTraitLastModificationTime(ReflectionClass $reflectionTrait): int
{
$fileName = $reflectionTrait->getFileName();
if (isset($this->loadedFilemtimes[$fileName])) {
return $this->loadedFilemtimes[$fileName];
}
$lastModificationTime = max(array_merge(
[$fileName ? filemtime($fileName) : 0],
array_map(function (ReflectionClass $reflectionTrait): int {
return $this->getTraitLastModificationTime($reflectionTrait);
}, $reflectionTrait->getTraits())
));
assert($lastModificationTime !== false);
return $this->loadedFilemtimes[$fileName] = $lastModificationTime;
}
}
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