*/
namespace Friendica\Core;
-use Friendica\Core\Config;
-use Friendica\Database\DBM;
-use Friendica\Util\Temporal;
-use dba;
-use Memcache;
-
-require_once 'include/dba.php';
+use Friendica\Core\Cache\Cache as CacheClass;
+use Friendica\DI;
/**
* @brief Class for storing data for a short time
*/
class Cache
{
- /**
- * @brief Check for memcache and open a connection if configured
- *
- * @return object|boolean The memcache object - or "false" if not successful
- */
- public static function memcache()
- {
- if (!function_exists('memcache_connect')) {
- return false;
- }
-
- if (!Config::get('system', 'memcache')) {
- return false;
- }
-
- $memcache_host = Config::get('system', 'memcache_host', '127.0.0.1');
- $memcache_port = Config::get('system', 'memcache_port', 11211);
-
- $memcache = new Memcache;
-
- if (!$memcache->connect($memcache_host, $memcache_port)) {
- return false;
- }
-
- return $memcache;
- }
+ /** @deprecated Use CacheClass::MONTH */
+ const MONTH = CacheClass::MONTH;
+ /** @deprecated Use CacheClass::WEEK */
+ const WEEK = CacheClass::WEEK;
+ /** @deprecated Use CacheClass::DAY */
+ const DAY = CacheClass::DAY;
+ /** @deprecated Use CacheClass::HOUR */
+ const HOUR = CacheClass::HOUR;
+ /** @deprecated Use CacheClass::HALF_HOUR */
+ const HALF_HOUR = CacheClass::HALF_HOUR;
+ /** @deprecated Use CacheClass::QUARTER_HOUR */
+ const QUARTER_HOUR = CacheClass::QUARTER_HOUR;
+ /** @deprecated Use CacheClass::FIVE_MINUTES */
+ const FIVE_MINUTES = CacheClass::FIVE_MINUTES;
+ /** @deprecated Use CacheClass::MINUTE */
+ const MINUTE = CacheClass::MINUTE;
+ /** @deprecated Use CacheClass::INFINITE */
+ const INFINITE = CacheClass::INFINITE;
/**
- * @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 $seconds;
+ return DI::cache()->getAllKeys($prefix);
}
/**
* @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;
- }
-
- // Frequently clear cache
- self::clear();
-
- $cache = dba::selectFirst('cache', ['v'], ['k' => $key]);
-
- if (DBM::is_result($cache)) {
- $cached = $cache['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 $value;
- }
- }
-
- return null;
+ return DI::cache()->get($key);
}
/**
* @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 = CacheClass::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;
- }
- $fields = ['v' => serialize($value), 'expire_mode' => $duration, 'updated' => Temporal::utcNow()];
- $condition = ['k' => $key];
- dba::update('cache', $fields, $condition, true);
+ return DI::cache()->set($key, $value, $duration);
}
/**
- * @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 = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("now - 30 days"),
- CACHE_MONTH];
- dba::delete('cache', $condition);
- }
-
- if ($max_level <= CACHE_WEEK) {
- $condition = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("now - 7 days"),
- CACHE_WEEK];
- dba::delete('cache', $condition);
- }
-
- if ($max_level <= CACHE_DAY) {
- $condition = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("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 = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("now - 1 hours"),
- CACHE_HOUR];
- dba::delete('cache', $condition);
-
- Config::set("system", "cache_cleared_hour", time());
- }
-
- if (($max_level <= CACHE_HALF_HOUR) && (Config::get("system", "cache_cleared_half_hour")) < time() - self::duration(CACHE_HALF_HOUR)) {
- $condition = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("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 = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("now - 15 minutes"),
- CACHE_QUARTER_HOUR];
- dba::delete('cache', $condition);
-
- Config::set("system", "cache_cleared_quarter_hour", time());
- }
-
- if (($max_level <= CACHE_FIVE_MINUTES) && (Config::get("system", "cache_cleared_five_minute")) < time() - self::duration(CACHE_FIVE_MINUTES)) {
- $condition = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("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 = ["`updated` < ? AND `expire_mode` = ?",
- Temporal::convert("now - 1 minutes"),
- CACHE_MINUTE];
- dba::delete('cache', $condition);
+ return DI::cache()->delete($key);
+ }
- Config::set("system", "cache_cleared_minute", time());
- }
+ /**
+ * @brief Remove outdated data from the cache
+ *
+ * @param boolean $outdated just remove outdated values
+ *
+ * @return bool
+ * @throws \Exception
+ */
+ public static function clear($outdated = true)
+ {
+ return DI::cache()->clear($outdated);
}
}