Data.CQRS.Aggregate
Description
Aggregate type class.
- class Aggregate a where
- encodeAggregate :: a -> ByteString
- decodeAggregate :: ByteString -> Maybe a
Documentation
Type class for aggregates.
Methods
encodeAggregate :: a -> ByteStringSource
Encode aggregate into a ByteString representation. The representation should contain some metadata (a UUID for example) which can be used to check reliably whether the encoded representation is valid upon decoding. This can be used if the actual aggregate structure changes.
decodeAggregate :: ByteString -> Maybe aSource
Decode ByteString to aggregate state. If decoding is not
possible should return Nothing.