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<?php |
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namespace Sugarcrm\UpgradeSpec\Cache\Adapter; |
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use Sugarcrm\UpgradeSpec\Cache\Exception\InvalidArgumentException; |
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trait AdapterTrait |
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{ |
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/** |
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* Default TTL. |
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* |
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* @var int |
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*/ |
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private $ttl = 0; |
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/** |
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* Obtains multiple cache items by their unique keys. |
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* |
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* @param iterable $keys a list of keys that can obtained in a single operation |
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* @param mixed $default default value to return for keys that do not exist |
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* |
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* @return \Generator A list of key => value pairs. Cache keys that do not exist or are stale will have $default as value. |
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*/ |
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public function getMultiple($keys, $default = null) |
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{ |
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$this->validateIterableKey($keys); |
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foreach ($keys as $key) { |
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yield $key => $this->get($key, $default); |
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} |
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} |
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/** |
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* Persists a set of key => value pairs in the cache, with an optional TTL. |
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* |
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* @param iterable $values a list of key => value pairs for a multiple-set operation |
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* @param null|int|DateInterval $ttl Optional. The TTL value of this item. If no value is sent and |
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* the driver supports TTL then the library may set a default value |
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* for it or let the driver take care of that. |
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* |
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* @return bool true on success and false on failure |
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*/ |
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public function setMultiple($values, $ttl = null) |
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{ |
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$this->validateIterableKey($values); |
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$result = true; |
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foreach ($values as $key => $value) { |
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if (!$this->set($key, $value, $ttl)) { |
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$result = false; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Deletes multiple cache items in a single operation. |
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* |
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* @param iterable $keys a list of string-based keys to be deleted |
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* |
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* @return bool True if the items were successfully removed. False if there was an error. |
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*/ |
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public function deleteMultiple($keys) |
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{ |
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$this->validateIterableKey($keys); |
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$result = true; |
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foreach ($keys as $key) { |
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if (!$this->delete($key)) { |
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$result = false; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Fetches a value from the cache. |
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* |
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* @param string $key The unique key of this item in the cache. |
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* @param mixed $default Default value to return if the key does not exist. |
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* |
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* @return mixed The value of the item from the cache, or $default in case of cache miss. |
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* |
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* @throws \Psr\SimpleCache\InvalidArgumentException |
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* MUST be thrown if the $key string is not a legal value. |
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*/ |
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public abstract function get($key, $default = null); |
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/** |
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* Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time. |
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* |
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* @param string $key The key of the item to store. |
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* @param mixed $value The value of the item to store, must be serializable. |
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* @param null|int|DateInterval $ttl Optional. The TTL value of this item. If no value is sent and |
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* the driver supports TTL then the library may set a default value |
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* for it or let the driver take care of that. |
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* |
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* @return bool True on success and false on failure. |
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* |
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* @throws \Psr\SimpleCache\InvalidArgumentException |
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* MUST be thrown if the $key string is not a legal value. |
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*/ |
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public abstract function set($key, $value, $ttl = null); |
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/** |
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* Delete an item from the cache by its unique key. |
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* |
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* @param string $key The unique cache key of the item to delete. |
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* |
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* @return bool True if the item was successfully removed. False if there was an error. |
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* |
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* @throws \Psr\SimpleCache\InvalidArgumentException |
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* MUST be thrown if the $key string is not a legal value. |
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*/ |
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public abstract function delete($key); |
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/** |
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* @param $key |
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* |
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* @throws InvalidArgumentException |
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*/ |
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private function validateIterableKey($key) |
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{ |
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if (!is_array($key) && !$key instanceof \Traversable) { |
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throw new InvalidArgumentException('Argument is not traversable'); |
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} |
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} |
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/** |
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* @param string $key |
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* |
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* @throws InvalidArgumentException |
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*/ |
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private function validateKey($key) |
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{ |
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if (!is_string($key) || empty($key) || mb_strlen($key) > 64) { |
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throw new InvalidArgumentException(sprintf('Invalid cache key: %s', $key)); |
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} |
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if (preg_match('/\{|\}|\(|\)|\/|\\\\|\@|\:/u', $key)) { |
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throw new InvalidArgumentException('"{}()/\@:" characters are reserved by PSR-16'); |
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} |
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} |
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/** |
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* @param $ttl |
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* |
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* @return int |
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* |
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* @throws InvalidArgumentException |
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*/ |
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private function getExpire($ttl) |
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{ |
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$expire = time() + $this->ttl; |
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if ($ttl instanceof \DateInterval) { |
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$expire = (new \DateTime('now'))->add($ttl)->getTimeStamp(); |
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} elseif (is_int($ttl) || ctype_digit($ttl)) { |
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$expire = time() + $ttl; |
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} elseif ($ttl !== null) { |
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throw new InvalidArgumentException(sprintf('Invalid TTL: %s', print_r($ttl, true))); |
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} |
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return $expire; |
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} |
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} |
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