code: public void setProperties(Properties properties) {
  		ttlInSeconds = Integer.valueOf(properties.getProperty("ttlInSeconds", "" + ttlInSeconds));
  		cleanupInterval = Integer.valueOf(properties.getProperty("cleanup_interval", "" + cleanupInterval));
  	}
docs: Initializes cache.
  Properties:
  <ul>
  <li>ttlInSeconds: time to live for stored objects in seconds (default: 900 = 15 minutes)</li>
  <li>cleanup_interval: interval for check for expired objects in seconds (default: 180 = 3 minutes)</li>
  </ul>