The Persistent annotation definition

persistent annotation.java

@Component
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Inherited
public @interface Persistent {
	Class<? extends BulkDataPersister>[] persistTo() default {NullBulkDataPersister.class};
	Class<? extends ManagedDataSource<?>> loadFrom() default NullManagedDataSource.class;
}

class NullBulkDataPersister implements BulkDataPersister{
	@Override
	public void executeBulk(List<BulkItem> arg0) throws DataSourceException {
	}
}

class NullManagedDataSource implements ManagedDataSource<Object>{
	@Override
	public void init(Properties arg0) throws DataSourceException {
	}
	@Override
	public DataIterator<Object> initialLoad() throws DataSourceException {
		return null;
	}
	@Override
	public void shutdown() throws DataSourceException {
	}
}