| | |
| | | private $cache = array(); |
| | | private $cache_changes = array(); |
| | | private $cache_sums = array(); |
| | | private $max_packet = -1; |
| | | |
| | | |
| | | /** |
| | |
| | | else { |
| | | $this->type = 'db'; |
| | | $this->db = $rcube->get_dbh(); |
| | | $this->table = $this->db->table_name('cache_shared'); |
| | | $this->table = $this->db->table_name('cache_shared', true); |
| | | } |
| | | |
| | | // convert ttl string to seconds |
| | |
| | | // Remove all keys |
| | | if ($key === null) { |
| | | $this->cache = array(); |
| | | $this->cache_changed = false; |
| | | $this->cache_changed = true; |
| | | $this->cache_changes = array(); |
| | | $this->cache_sums = array(); |
| | | } |
| | |
| | | { |
| | | if ($this->type == 'db' && $this->db && $this->ttl) { |
| | | $this->db->query( |
| | | "DELETE FROM " . $this->table |
| | | . " WHERE cache_key LIKE ?" |
| | | . " AND " . $this->db->unixtimestamp('created') . " < ?", |
| | | $this->prefix . '.%', |
| | | time() - $this->ttl); |
| | | "DELETE FROM {$this->table}" |
| | | . " WHERE `cache_key` LIKE ?" |
| | | . " AND `expires` < " . $this->db->now(), |
| | | $this->prefix . '.%'); |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Remove expired records of all caches |
| | | */ |
| | | static function gc() |
| | | { |
| | | $rcube = rcube::get_instance(); |
| | | $db = $rcube->get_dbh(); |
| | | |
| | | $db->query("DELETE FROM " . $db->table_name('cache_shared', true) . " WHERE `expires` < " . $db->now()); |
| | | } |
| | | |
| | | |
| | |
| | | } |
| | | |
| | | if ($this->type != 'db') { |
| | | if ($this->type == 'memcache') { |
| | | $this->load_index(); |
| | | |
| | | // Consistency check (#1490390) |
| | | if (!in_array($key, $this->index)) { |
| | | // we always check if the key exist in the index |
| | | // to have data in consistent state. Keeping the index consistent |
| | | // is needed for keys delete operation when we delete all keys or by prefix. |
| | | } |
| | | else if ($this->type == 'memcache') { |
| | | $data = $this->db->get($this->ckey($key)); |
| | | } |
| | | else if ($this->type == 'apc') { |
| | |
| | | } |
| | | else { |
| | | $sql_result = $this->db->limitquery( |
| | | "SELECT data, cache_key". |
| | | " FROM " . $this->table . |
| | | " WHERE cache_key = ?". |
| | | "SELECT `data`, `cache_key`". |
| | | " FROM {$this->table}" . |
| | | " WHERE `cache_key` = ?". |
| | | // for better performance we allow more records for one key |
| | | // get the newer one |
| | | " ORDER BY created DESC", |
| | | " ORDER BY `created` DESC", |
| | | 0, 1, $this->prefix . '.' . $key); |
| | | |
| | | if ($sql_arr = $this->db->fetch_assoc($sql_result)) { |
| | |
| | | * Writes single cache record into DB. |
| | | * |
| | | * @param string $key Cache key name |
| | | * @param mxied $data Serialized cache data |
| | | * @param mixed $data Serialized cache data |
| | | * |
| | | * @param boolean True on success, False on failure |
| | | */ |
| | |
| | | return false; |
| | | } |
| | | |
| | | // don't attempt to write too big data sets |
| | | if (strlen($data) > $this->max_packet_size()) { |
| | | trigger_error("rcube_cache: max_packet_size ($this->max_packet) exceeded for key $key. Tried to write " . strlen($data) . " bytes", E_USER_WARNING); |
| | | return false; |
| | | } |
| | | |
| | | if ($this->type == 'memcache' || $this->type == 'apc') { |
| | | return $this->add_record($this->ckey($key), $data); |
| | | $result = $this->add_record($this->ckey($key), $data); |
| | | |
| | | // make sure index will be updated |
| | | if ($result && !array_key_exists($key, $this->cache_sums)) { |
| | | $this->cache_changed = true; |
| | | $this->cache_sums[$key] = true; |
| | | } |
| | | |
| | | return $result; |
| | | } |
| | | |
| | | $key_exists = array_key_exists($key, $this->cache_sums); |
| | |
| | | |
| | | // Remove NULL rows (here we don't need to check if the record exist) |
| | | if ($data == 'N;') { |
| | | $this->db->query("DELETE FROM " . $this->table . " WHERE cache_key = ?", $key); |
| | | $this->db->query("DELETE FROM {$this->table} WHERE `cache_key` = ?", $key); |
| | | return true; |
| | | } |
| | | |
| | | // update existing cache record |
| | | if ($key_exists) { |
| | | $result = $this->db->query( |
| | | "UPDATE " . $this->table . |
| | | " SET created = " . $this->db->now() . ", data = ?" . |
| | | " WHERE cache_key = ?", |
| | | "UPDATE {$this->table}" . |
| | | " SET `created` = " . $this->db->now() . |
| | | ", `expires` = " . ($this->ttl ? $this->db->now($this->ttl) : 'NULL') . |
| | | ", `data` = ?". |
| | | " WHERE `cache_key` = ?", |
| | | $data, $key); |
| | | } |
| | | // add new cache record |
| | |
| | | // for better performance we allow more records for one key |
| | | // so, no need to check if record exist (see rcube_cache::read_record()) |
| | | $result = $this->db->query( |
| | | "INSERT INTO ".$this->table. |
| | | " (created, cache_key, data)". |
| | | " VALUES (".$this->db->now().", ?, ?)", |
| | | "INSERT INTO {$this->table}". |
| | | " (`created`, `expires`, `cache_key`, `data`)". |
| | | " VALUES (".$this->db->now().", " . ($this->ttl ? $this->db->now($this->ttl) : 'NULL') . ", ?, ?)", |
| | | $key, $data); |
| | | } |
| | | |
| | |
| | | |
| | | // Remove all keys (in specified cache) |
| | | if ($key === null) { |
| | | $where = " WHERE cache_key LIKE " . $this->db->quote($this->prefix.'.%'); |
| | | $where = " WHERE `cache_key` LIKE " . $this->db->quote($this->prefix.'.%'); |
| | | } |
| | | // Remove keys by name prefix |
| | | else if ($prefix_mode) { |
| | | $where = " WHERE cache_key LIKE " . $this->db->quote($this->prefix.'.'.$key.'%'); |
| | | $where = " WHERE `cache_key` LIKE " . $this->db->quote($this->prefix.'.'.$key.'%'); |
| | | } |
| | | // Remove one key by name |
| | | else { |
| | | $where = " WHERE cache_key = " . $this->db->quote($this->prefix.'.'.$key); |
| | | $where = " WHERE `cache_key` = " . $this->db->quote($this->prefix.'.'.$key); |
| | | } |
| | | |
| | | $this->db->query("DELETE FROM " . $this->table . $where); |
| | |
| | | /** |
| | | * Adds entry into memcache/apc DB. |
| | | * |
| | | * @param string $key Cache key name |
| | | * @param mxied $data Serialized cache data |
| | | * @param bollean $index Enables immediate index update |
| | | * @param string $key Cache key name |
| | | * @param mixed $data Serialized cache data |
| | | * |
| | | * @param boolean True on success, False on failure |
| | | */ |
| | | private function add_record($key, $data, $index=false) |
| | | private function add_record($key, $data) |
| | | { |
| | | if ($this->type == 'memcache') { |
| | | $result = $this->db->replace($key, $data, MEMCACHE_COMPRESSED, $this->ttl); |
| | |
| | | apc_delete($key); |
| | | } |
| | | $result = apc_store($key, $data, $this->ttl); |
| | | } |
| | | |
| | | // Update index |
| | | if ($index && $result) { |
| | | $this->load_index(); |
| | | |
| | | if (array_search($key, $this->index) === false) { |
| | | $this->index[] = $key; |
| | | $data = serialize($this->index); |
| | | $this->add_record($this->ikey(), $data); |
| | | } |
| | | } |
| | | |
| | | return $result; |
| | |
| | | |
| | | // Make sure index contains new keys |
| | | foreach ($this->cache as $key => $value) { |
| | | if ($value !== null) { |
| | | if (array_search($key, $this->index) === false) { |
| | | $this->index[] = $key; |
| | | } |
| | | if ($value !== null && !in_array($key, $this->index)) { |
| | | $this->index[] = $key; |
| | | } |
| | | } |
| | | |
| | | // new keys added using self::write() |
| | | foreach ($this->cache_sums as $key => $value) { |
| | | if ($value === true && !in_array($key, $this->index)) { |
| | | $this->index[] = $key; |
| | | } |
| | | } |
| | | |
| | |
| | | |
| | | return $this->packed ? @unserialize($data) : $data; |
| | | } |
| | | |
| | | /** |
| | | * Determine the maximum size for cache data to be written |
| | | */ |
| | | private function max_packet_size() |
| | | { |
| | | if ($this->max_packet < 0) { |
| | | $this->max_packet = 2097152; // default/max is 2 MB |
| | | |
| | | if ($this->type == 'db') { |
| | | if ($value = $this->db->get_variable('max_allowed_packet', $this->max_packet)) { |
| | | $this->max_packet = $value; |
| | | } |
| | | $this->max_packet -= 2000; |
| | | } |
| | | else if ($this->type == 'memcache') { |
| | | $stats = $this->db->getStats(); |
| | | $remaining = $stats['limit_maxbytes'] - $stats['bytes']; |
| | | $this->max_packet = min($remaining / 5, $this->max_packet); |
| | | } |
| | | else if ($this->type == 'apc' && function_exists('apc_sma_info')) { |
| | | $stats = apc_sma_info(); |
| | | $this->max_packet = min($stats['avail_mem'] / 5, $this->max_packet); |
| | | } |
| | | } |
| | | |
| | | return $this->max_packet; |
| | | } |
| | | } |