====== nsVarCacheDB ======

Database storage for nsVarCache class.

===== Members =====

==== fields ====
  * **getter:** [[.:c-nsobject#getters-and-setters|getField]]
  * **setter:** [[.:c-nsobject#getters-and-setters|setField]]
  * **Visibility:** protected
<code PHP>
    protected $fields = array();
</code>


===== Methods =====

==== loadValue ====
  * **inherited abstract**
  * <php>$field</php> - name of the variable queried
  * **return value:** should return the value of variable <php>$field</php> from cache storage.
<code PHP>
    abstract public function loadValue($field);
</code>
Loads variable from database.

==== storeValue ====
  * **inherited abstract**
  * <php>$field</php> - name of the variable queried
  * <php>$value</php> - value to be stored
  * **return value:** <php>true</php> on success or <php>false</php> on failure
<code PHP>
    abstract public function storeValue($field, $value);
</code>
  Stores variable to database.

==== preload ====
  * **inherited abstract**
  * <php>$fields</php> - array of variables to preload
  * **return value:** <php>true</php> on success or <php>false</php> on failure.
<code PHP>
  abstract public function preload($fields);
</code>

  Preloads an array of variables from database.

==== gc ====
  * **inherited abstract**
  * **return value:** //N/A//.
<code PHP>
  abstract public function gc();
</code>

  Garbage collector. Deletes all expired variables from database.

==== getField ====
  * **inherited**
  * <php>$field</php> - name of the variable queried
  * **return value:** returns the value of variable <php>$field</php> or false if fails.
<code PHP>
    abstract public function getField($field);
</code>

==== setField ====
  * **inherited**
  * <php>$field</php> - name of the variable
  * **return value:** sets the value of variable <php>$field</php> or false if fails.
<code PHP>
    abstract public function setField($field);
</code>