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<?php |
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namespace ByJG\Cache\Psr16; |
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use Psr\Log\NullLogger; |
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use Psr\SimpleCache\DateInterval; |
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class ArrayCacheEngine extends BaseCacheEngine |
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{ |
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protected $cache = array(); |
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protected $logger = null; |
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public function __construct($logger = null) |
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{ |
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$this->logger = $logger; |
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if (is_null($logger)) { |
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$this->logger = new NullLogger(); |
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} |
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} |
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/** |
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* Determines whether an item is present in the cache. |
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* NOTE: It is recommended that has() is only to be used for cache warming type purposes |
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* and not to be used within your live applications operations for get/set, as this method |
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* is subject to a race condition where your has() will return true and immediately after, |
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* another script can remove it making the state of your app out of date. |
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* |
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* @param string $key The cache item key. |
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* @return bool |
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* @throws \Psr\SimpleCache\InvalidArgumentException |
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* MUST be thrown if the $key string is not a legal value. |
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*/ |
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public function has($key) |
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{ |
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if (isset($this->cache[$key])) { |
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if (isset($this->cache["$key.ttl"]) && time() >= $this->cache["$key.ttl"]) { |
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$this->delete($key); |
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return false; |
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} |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param string $key The object KEY |
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* @param mixed $default IGNORED IN MEMCACHED. |
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* @return mixed Description |
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*/ |
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public function get($key, $default = null) |
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{ |
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if ($this->has($key)) { |
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$this->logger->info("[Array cache] Get '$key' from L1 Cache"); |
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return $this->cache[$key]; |
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} else { |
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$this->logger->info("[Array cache] Not found '$key'"); |
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return $default; |
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} |
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} |
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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 $key string is not a legal value. |
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*/ |
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public function set($key, $value, $ttl = null) |
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{ |
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$this->logger->info("[Array cache] Set '$key' in L1 Cache"); |
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$this->cache[$key] = $value; |
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if (!empty($ttl)) { |
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$this->cache["$key.ttl"] = $this->addToNow($ttl); |
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} |
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return true; |
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} |
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public function clear() |
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{ |
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$this->cache = []; |
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} |
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/** |
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* Unlock resource |
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* |
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* @param string $key |
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* @return bool|void |
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*/ |
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public function delete($key) |
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{ |
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unset($this->cache[$key]); |
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unset($this->cache["$key.ttl"]); |
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return true; |
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} |
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public function isAvailable() |
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{ |
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return true; |
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} |
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} |
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byjg /
cache-engine-php
