*/
namespace Friendica\Core;
-use Friendica\Core\Config;
-use Friendica\Core\PConfig;
-use Friendica\Database\DBM;
-use dba;
+use Friendica\Core\Cache\CacheDriverFactory;
/**
* @brief Class for storing data for a short time
*/
-class Cache
+class Cache extends \Friendica\BaseObject
{
+ const MONTH = 2592000;
+ const WEEK = 604800;
+ const DAY = 86400;
+ const HOUR = 3600;
+ const HALF_HOUR = 1800;
+ const QUARTER_HOUR = 900;
+ const FIVE_MINUTES = 300;
+ const MINUTE = 60;
+ const INFINITE = 0;
+
/**
- * @brief Check for memcache and open a connection if configured
- *
- * @return object|boolean The memcache object - or "false" if not successful
+ * @var Cache\ICacheDriver
*/
- public static function memcache()
- {
- if (!function_exists('memcache_connect')) {
- return false;
- }
-
- if (!Config::get('system', 'memcache')) {
- return false;
- }
+ private static $driver = null;
+ public static $driver_class = null;
+ public static $driver_name = null;
- $memcache_host = Config::get('system', 'memcache_host', '127.0.0.1');
- $memcache_port = Config::get('system', 'memcache_port', 11211);
-
- $memcache = new Memcache;
+ public static function init()
+ {
+ self::$driver_name = Config::get('system', 'cache_driver', 'database');
+ self::$driver = CacheDriverFactory::create(self::$driver_name);
+ self::$driver_class = get_class(self::$driver);
+ }
- if (!$memcache->connect($memcache_host, $memcache_port)) {
- return false;
+ /**
+ * Returns the current cache driver
+ *
+ * @return Cache\ICacheDriver
+ */
+ private static function getDriver()
+ {
+ if (self::$driver === null) {
+ self::init();
}
- return $memcache;
+ return self::$driver;
}
/**
- * @brief Return the duration for a given cache level
+ * @brief Returns all the cache keys sorted alphabetically
*
- * @param integer $level Cache level
+ * @param string $prefix Prefix of the keys (optional)
*
- * @return integer The cache duration in seconds
+ * @return array Empty if the driver doesn't support this feature
+ * @throws \Exception
*/
- private static function duration($level)
+ public static function getAllKeys($prefix = null)
{
- switch ($level) {
- case CACHE_MONTH:
- $seconds = 2592000;
- break;
- case CACHE_WEEK:
- $seconds = 604800;
- break;
- case CACHE_DAY:
- $seconds = 86400;
- break;
- case CACHE_HOUR:
- $seconds = 3600;
- break;
- case CACHE_HALF_HOUR:
- $seconds = 1800;
- break;
- case CACHE_QUARTER_HOUR:
- $seconds = 900;
- break;
- case CACHE_FIVE_MINUTES:
- $seconds = 300;
- break;
- case CACHE_MINUTE:
- $seconds = 60;
- break;
- }
- return $seconds;
+ $time = microtime(true);
+
+ $return = self::getDriver()->getAllKeys($prefix);
+
+ self::getApp()->getProfiler()->saveTimestamp($time, 'cache', System::callstack());
+
+ return $return;
}
/**
* @param string $key The key to the cached data
*
* @return mixed Cached $value or "null" if not found
+ * @throws \Exception
*/
public static function get($key)
{
- $memcache = self::memcache();
- if (is_object($memcache)) {
- // We fetch with the hostname as key to avoid problems with other applications
- $cached = $memcache->get(get_app()->get_hostname().":".$key);
- $value = @unserialize($cached);
-
- // Only return a value if the serialized value is valid.
- // We also check if the db entry is a serialized
- // boolean 'false' value (which we want to return).
- if ($cached === serialize(false) || $value !== false) {
- return $value;
- }
-
- return null;
- }
+ $time = microtime(true);
- // Frequently clear cache
- self::clear($duration);
+ $return = self::getDriver()->get($key);
- $r = dba::select('cache', array('v'), array('k' => $key), array('limit' => 1));
+ self::getApp()->getProfiler()->saveTimestamp($time, 'cache', System::callstack());
- if (DBM::is_result($r)) {
- $cached = $r['v'];
- $value = @unserialize($cached);
-
- // Only return a value if the serialized value is valid.
- // We also check if the db entry is a serialized
- // boolean 'false' value (which we want to return).
- if ($cached === serialize(false) || $value !== false) {
- return $value;
- }
- }
-
- return null;
+ return $return;
}
/**
* @param mixed $value The value that is about to be stored
* @param integer $duration The cache lifespan
*
- * @return void
+ * @return bool
+ * @throws \Exception
*/
- public static function set($key, $value, $duration = CACHE_MONTH)
+ public static function set($key, $value, $duration = self::MONTH)
{
- // Do we have an installed memcache? Use it instead.
- $memcache = self::memcache();
- if (is_object($memcache)) {
- // We store with the hostname as key to avoid problems with other applications
- $memcache->set(get_app()->get_hostname().":".$key, serialize($value), MEMCACHE_COMPRESSED, self::duration($duration));
- return;
- }
- $fields = array('v' => serialize($value), 'expire_mode' => $duration, 'updated' => datetime_convert());
- $condition = array('k' => $key);
- dba::update('cache', $fields, $condition, true);
+ $time = microtime(true);
+
+ $return = self::getDriver()->set($key, $value, $duration);
+
+ self::getApp()->getProfiler()->saveTimestamp($time, 'cache_write', System::callstack());
+
+ return $return;
}
/**
- * @brief Remove outdated data from the cache
+ * @brief Delete a value from the cache
*
- * @param integer $max_level The maximum cache level that is to be cleared
+ * @param string $key The key to the cached data
*
- * @return void
+ * @return bool
+ * @throws \Exception
*/
- public static function clear($max_level = CACHE_MONTH)
+ public static function delete($key)
{
- // Clear long lasting cache entries only once a day
- if (Config::get("system", "cache_cleared_day") < time() - self::duration(CACHE_DAY)) {
- if ($max_level == CACHE_MONTH) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 30 days"),
- CACHE_MONTH);
- dba::delete('cache', $condition);
- }
-
- if ($max_level <= CACHE_WEEK) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 7 days"),
- CACHE_WEEK);
- dba::delete('cache', $condition);
- }
-
- if ($max_level <= CACHE_DAY) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 1 days"),
- CACHE_DAY);
- dba::delete('cache', $condition);
- }
- Config::set("system", "cache_cleared_day", time());
- }
-
- if (($max_level <= CACHE_HOUR) && (Config::get("system", "cache_cleared_hour")) < time() - self::duration(CACHE_HOUR)) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 1 hours"),
- CACHE_HOUR);
- dba::delete('cache', $condition);
+ $time = microtime(true);
- Config::set("system", "cache_cleared_hour", time());
- }
-
- if (($max_level <= CACHE_HALF_HOUR) && (Config::get("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 30 minutes"),
- CACHE_HALF_HOUR);
- dba::delete('cache', $condition);
-
- Config::set("system", "cache_cleared_half_hour", time());
- }
-
- if (($max_level <= CACHE_QUARTER_HOUR) && (Config::get("system", "cache_cleared_quarter_hour")) < time() - self::duration(CACHE_QUARTER_HOUR)) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 15 minutes"),
- CACHE_QUARTER_HOUR);
- dba::delete('cache', $condition);
+ $return = self::getDriver()->delete($key);
- Config::set("system", "cache_cleared_quarter_hour", time());
- }
+ self::getApp()->getProfiler()->saveTimestamp($time, 'cache_write', System::callstack());
- if (($max_level <= CACHE_FIVE_MINUTES) && (Config::get("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 5 minutes"),
- CACHE_FIVE_MINUTES);
- dba::delete('cache', $condition);
-
- Config::set("system", "cache_cleared_five_minute", time());
- }
-
- if (($max_level <= CACHE_MINUTE) && (Config::get("system", "cache_cleared_minute")) < time() - self::duration(CACHE_MINUTE)) {
- $condition = array("`updated` < ? AND `expire_mode` = ?",
- datetime_convert('UTC', 'UTC', "now - 1 minutes"),
- CACHE_MINUTE);
- dba::delete('cache', $condition);
+ return $return;
+ }
- Config::set("system", "cache_cleared_minute", time());
- }
+ /**
+ * @brief Remove outdated data from the cache
+ *
+ * @param boolean $outdated just remove outdated values
+ *
+ * @return bool
+ */
+ public static function clear($outdated = true)
+ {
+ return self::getDriver()->clear($outdated);
}
}
projects / friendica.git / blobdiff