dataStoreFactory.add("store2", dataStore2);

        assertSame(dataStore1, dataStoreFactory.getDataStore("store1"));
        assertSame(dataStore2, dataStoreFactory.getDataStore("store2"));
        assertSame(dataStore1, dataStoreFactory.getDataStore("TestDataStore"));
        assertSame(dataStore2, dataStoreFactory.getDataStore("TestDataStore2"));
    }

    // Test overwriting existing data store

    @Resource
    private DataConfigPager dataConfigPager;
    @Resource
    private RoleTypeService roleTypeService;
    /** The data store factory. */
    @Resource
    protected DataStoreFactory dataStoreFactory;

    // ===================================================================================
    //                                                                               Hook

         * deletes old documents if configured to do so.
         */
        protected void process() {
            final DataStoreFactory dataStoreFactory = ComponentUtil.getDataStoreFactory();
            dataStore = dataStoreFactory.getDataStore(dataConfig.getHandlerName());
            if (dataStore == null) {
                logger.error("DataStore({}) is not found.", dataConfig.getHandlerName());