48 lines
1.2 KiB
PHP
48 lines
1.2 KiB
PHP
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<?php
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namespace Friendica\Core\Cache;
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use Friendica\Core\Cache;
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/**
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* Trait TraitCompareSetDelete
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*
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* @brief This Trait is to compensate non native "exclusive" sets/deletes in caches
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*
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* @package Friendica\Core\Cache
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*/
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trait TraitCompareSet
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{
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abstract public function get($key);
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abstract public function set($key, $value, $ttl = Cache::FIVE_MINUTES);
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abstract public function delete($key);
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abstract public function add($key, $value, $ttl = Cache::FIVE_MINUTES);
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/**
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* @brief NonNative - Compares if the old value is set and sets the new value
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*
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* @param string $key The cache key
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* @param mixed $oldValue The old value we know from the cache
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* @param mixed $newValue The new value we want to set
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* @param int $ttl The cache lifespan, must be one of the Cache constants
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*
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* @return bool
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*/
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public function compareSet($key, $oldValue, $newValue, $ttl = Cache::FIVE_MINUTES) {
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if ($this->add($key . "_lock", true)) {
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if ($this->get($key) === $oldValue) {
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$this->set($key, $newValue, $ttl);
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$this->delete($key . "_lock");
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return true;
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} else {
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$this->delete($key . "_lock");
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return false;
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}
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} else {
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return false;
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}
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}
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}
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