Hi,
I tried using the Lifecycle interface to initialize Entity state,
specifically to set a "created on" Date property, but I realized that
Lifecycle is really of limited value in a system which uses
EventSourcing, as we do.
The reason is that the entity itself is being created as a consequence
of an event, which can either happen at the point that the command to
the domain model is being processed, or much later during an event
replay. In either case the resulting domain model state much be exactly
the same, and if you're doing things in Lifecycle that is going to be
tricky.
In my case I was setting a Date property to "new Date()". During command
processing that would be fine, but during event replay that is entirely
wrong, since the date must be what it was when the event to create the
entity was generated.
So, for this reason the Lifecycle interface, although potentially very
practical, is of limited use in an EventSourcing setup.
/Rickard
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