@RequiresSession
  public List<ExtensionLinkEntity> findAll() {
    TypedQuery<ExtensionLinkEntity> query = entityManagerProvider.get().createNamedQuery(
        "ExtensionLinkEntity.findAll", ExtensionLinkEntity.class);

    return daoUtils.selectList(query);
  }
Gets all of the defined extension links.

@return all of the extension links loaded from resources or an empty list (never
        {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/orm/dao/ExtensionLinkDAO.java