getInvalidate() public method

Returns an timestamp as integer which tells the cache handler that all stored caches before this timestamp are automatically invalidated.
public getInvalidate ( string $key ) : integer | null
$key string
return integer | null
AbstractCache Class Documentation
Example #1
0
 /**
  * Returns latest invalidation timestamp for the given $key.
  *
  * Returns an timestamp as integer which tells the cache handler that all stored caches
  * before this timestamp are automatically invalide.
  *
  * Returns null when no invalidation has set yet, means also that the cache with given key
  * is valid.
  *
  * @return integer|null
  */
 public function isCacheIsValid($key, $timestamp)
 {
     $parents = explode('/', $key);
     $code = '';
     foreach ($parents as $parent) {
         $code .= $parent;
         $invalidateTime = $this->distributedCache->getInvalidate($code);
         if (null !== $invalidateTime && $invalidateTime >= $timestamp) {
             //we found a invalidation that is newer than the cache of $timestamp
             //this means this cache has been invalidated.
             return false;
         }
         $code .= '/';
     }
     return true;
 }