forked from extern/egroupware
* APCu/PHP7: fixed not used APCu under PHP7, as it has no APC compatible interface
Apcu class is basicly a copy of Apc, but as its methods are called quite a lot, I dont want to add the overhad of checking to call apc_ or apcu_ on every call, anyway APC died with PHP 5.5 so we can remove Apcu class once we no longer support PHP 5.4
This commit is contained in:
Ralf Becker
parent
5d90b8f16d
commit
28731fbbb9
@ -555,7 +555,7 @@ class Cache
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}
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if (!$providers[$level] && $log_not_found) error_log(__METHOD__."($level) no provider found ($reason)!".function_backtrace());
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}
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//error_log(__METHOD__."($level) = ".array2string($providers[$level]).', cache_provider='.array2string($GLOBALS['egw_info']['server']['cache_provider_'.strtolower($level)]));
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error_log(__METHOD__."($level) = ".array2string($providers[$level]).', cache_provider='.array2string($GLOBALS['egw_info']['server']['cache_provider_'.strtolower($level)]));
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return $providers[$level];
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}
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@ -730,11 +730,13 @@ class Cache
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}
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}
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// setting apc as default provider, if apc_fetch function exists AND further checks in Api\Cache\Apc recommed it
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// setting apc(u) as default provider, if apc(u)_fetch function exists AND further checks in Api\Cache\Apc(u) recommed it
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if (is_null(Cache::$default_provider))
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{
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Cache::$default_provider = function_exists('apc_fetch') && Cache\Apc::available() ?
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'EGroupware\Api\Cache\Apc' : 'EGroupware\Api\Cache\Files';
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Cache::$default_provider =
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function_exists('apcu_fetch') && Cache\Apcu::available() ? 'EGroupware\Api\Cache\Apcu' :
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(function_exists('apc_fetch') && Cache\Apc::available() ? 'EGroupware\Api\Cache\Apc' :
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'EGroupware\Api\Cache\Files');
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}
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//error_log('Cache::$default_provider='.array2string(Cache::$default_provider));
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184
api/src/Cache/Apcu.php
Normal file
184
api/src/Cache/Apcu.php
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@ -0,0 +1,184 @@
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<?php
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/**
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* EGroupware API: Caching provider storing data in PHP's APCu extension
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage cache
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2010-16 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @version $Id$
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*/
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namespace EGroupware\Api\Cache;
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/**
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* Caching provider storing data in PHP's APCu extension / shared memory.
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*
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* The provider concats all $keys with '::' to get a single string.
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*
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* This provider is used by default, if it is available or explicit enabled in your header.inc.php:
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* $GLOBALS['egw_info']['server']['cache_provider_instance'] = array('EGroupware\Api\Cache\Apc');
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* and optional also $GLOBALS['egw_info']['server']['cache_provider_tree'] (defaults to instance)
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*
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* APC(u) and CLI:
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* --------------
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* APC(u) is not enabled by default for CLI (apc.enable_cli), nor would it access same shared memory!
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* It makes no sense to fall back to files cache, as this is probably quite outdated,
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* if PHP via Webserver uses APC. Better to use no cache at all.
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* Api\Cache::get*() will return NULL for not found and Api\Cache::[un]set*()
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* false for not being able to (un)set anything.
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* It also does not make sense to report failure by throwing an Exception and filling
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* up cron logs.
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* --> if APC(u) is available for Webserver, we report availability for CLI too,
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* but use no cache at all!
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*/
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class Apcu extends Base implements Provider
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{
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/**
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* Constructor, eg. opens the connection to the backend
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*
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* @throws Exception if connection to backend could not be established
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* @param array $params eg. array('localhost'[,'localhost:11211',...])
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*/
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function __construct(array $params)
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{
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if (!function_exists('apcu_fetch')) // apc >= 3.0
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{
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throw new Exception (__METHOD__.'('.array2string($params).") No function apcu_fetch()!");
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}
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}
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/**
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* Check if APC is available for caching user data
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*
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* Default shared memory size of 32M is just enough for the byte code cache,
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* but not for caching user data, we only use APC by default if we have at least 64M.
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*
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* @return boolean true: apc available, false: not
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*/
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public static function available()
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{
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if (($available = (bool)ini_get('apc.enabled') && function_exists('apcu_fetch')))
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{
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$size = ini_get('apc.shm_size');
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switch(strtoupper(substr($size, -1)))
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{
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case 'G':
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$size *= 1024;
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case 'M':
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$size *= 1024;
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case 'K':
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$size *= 1024;
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}
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$size *= ini_get('apc.shm_segments');
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// only cache in APC, if we have at least 64M available (default is 32M)
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$available = $size >= 67108864;
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}
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//error_log(__METHOD__."() size=$size returning ".array2string($available));
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return $available;
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}
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/**
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* Stores some data in the cache, if it does NOT already exists there
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*
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* @param array $keys eg. array($level,$app,$location)
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* @param mixed $data
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* @param int $expiration =0
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* @return boolean true on success, false on error, incl. key already exists in cache
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*/
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function add(array $keys,$data,$expiration=0)
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{
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return apcu_add(self::key($keys),$data,$expiration);
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}
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/**
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* Stores some data in the cache
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*
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* @param array $keys eg. array($level,$app,$location)
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* @param mixed $data
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* @param int $expiration =0
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* @return boolean true on success, false on error
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*/
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function set(array $keys,$data,$expiration=0)
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{
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return apcu_store(self::key($keys),$data,$expiration);
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}
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/**
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* Get some data from the cache
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*
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* @param array $keys eg. array($level,$app,$location)
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* @return mixed data stored or NULL if not found in cache
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*/
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function get(array $keys)
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{
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$success = null;
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$data = apcu_fetch($key=self::key($keys),$success);
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if (!$success)
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{
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//error_log(__METHOD__."(".array2string($keys).") key='$key' NOT found!");
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return null;
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}
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//error_log(__METHOD__."(".array2string($keys).") key='$key' found ".bytes(serialize($data))." bytes).");
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return $data;
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}
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/**
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* Delete some data from the cache
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*
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* @param array $keys eg. array($level,$app,$location)
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* @return boolean true on success, false on error (eg. $key not set)
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*/
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function delete(array $keys)
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{
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return apcu_delete(self::key($keys));
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}
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/**
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* Delete all data under given keys
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*
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* @param array $keys eg. array($level,$app,$location)
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* @return boolean true on success, false on error (eg. $key not set)
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*/
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function flush(array $keys)
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{
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// APCu > 5 has APCUIterator
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if (class_exists('APCUIterator'))
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{
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$iterator = new \APCUIterator($preg='/^'.preg_quote(self::key($keys).'/'));
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}
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// APC >= 3.1.1, but also seems to be missing if apc is disabled eg. for cli
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elseif(class_exists('APCIterator'))
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{
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$iterator = new \APCIterator('user', $preg='/^'.preg_quote(self::key($keys).'/'));
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}
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else
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{
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if (function_exists('apcu_clear_cache')) apcu_clear_cache ();
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return false;
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}
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foreach($iterator as $item)
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{
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//error_log(__METHOD__."(".array2string($keys).") preg='$preg': calling apcu_delete('$item[key]')");
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apcu_delete($item['key']);
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}
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return true;
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}
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/**
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* Create a single key from $keys
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*
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* @param array $keys
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* @return string
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*/
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private static function key(array $keys)
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{
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return implode('::',$keys);
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}
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}
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