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phabricator/src/infrastructure/cache/PhutilAPCKeyValueCache.php
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PhutilAPCKeyValueCache.php
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<?php
/**
* Interface to the APC key-value cache. This is a very high-performance cache
* which is local to the current machine.
*/
final class PhutilAPCKeyValueCache extends PhutilKeyValueCache {
/* -( Key-Value Cache Implementation )------------------------------------- */
public function isAvailable() {
return (function_exists('apc_fetch') || function_exists('apcu_fetch')) &&
ini_get('apc.enabled') &&
(ini_get('apc.enable_cli') || php_sapi_name() != 'cli');
}
public function getKeys(array $keys, $ttl = null) {
static $is_apcu;
if ($is_apcu === null) {
$is_apcu = self::isAPCu();
}
$results = array();
$fetched = false;
foreach ($keys as $key) {
if ($is_apcu) {
$result = apcu_fetch($key, $fetched);
} else {
$result = apc_fetch($key, $fetched);
}
if ($fetched) {
$results[$key] = $result;
}
}
return $results;
}
public function setKeys(array $keys, $ttl = null) {
static $is_apcu;
if ($is_apcu === null) {
$is_apcu = self::isAPCu();
}
// NOTE: Although modern APC supports passing an array to `apc_store()`,
// it is not supported by older version of APC or by HPHP.
// See T13525 for discussion of use of "@" to silence this warning:
// > GC cache entry "<some-key-name>" was on gc-list for <X> seconds
foreach ($keys as $key => $value) {
if ($is_apcu) {
@apcu_store($key, $value, $ttl);
} else {
@apc_store($key, $value, $ttl);
}
}
return $this;
}
public function deleteKeys(array $keys) {
static $is_apcu;
if ($is_apcu === null) {
$is_apcu = self::isAPCu();
}
foreach ($keys as $key) {
if ($is_apcu) {
apcu_delete($key);
} else {
apc_delete($key);
}
}
return $this;
}
public function destroyCache() {
static $is_apcu;
if ($is_apcu === null) {
$is_apcu = self::isAPCu();
}
if ($is_apcu) {
apcu_clear_cache();
} else {
apc_clear_cache('user');
}
return $this;
}
private static function isAPCu() {
return function_exists('apcu_fetch');
}
}

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