private JdbcStringBasedStoreConfiguration buildStringStoreConfiguration(JdbcMixedStoreConfiguration configuration){
ConfigurationBuilder builder = new ConfigurationBuilder();
JdbcStringBasedStoreConfigurationBuilder stringBuilder = builder.persistence().addStore
(JdbcStringBasedStoreConfigurationBuilder.class).manageConnectionFactory(false);
stringBuilder.
key2StringMapper(configuration.key2StringMapper()).
table().read(configuration.stringTable());
return stringBuilder.create();
}