| | |
| | | private $cache = array(); |
| | | private $cache_changes = array(); |
| | | private $cache_sums = array(); |
| | | private $max_packet = -1; |
| | | |
| | | |
| | | /** |
| | |
| | | // Remove all keys |
| | | if ($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') { |
| | | 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') { |
| | |
| | | * 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); |
| | |
| | | /** |
| | | * 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; |
| | | } |
| | | } |