Re: 5 important questions

"Does Prevayler provide this? Does Prevayler provide that?"

The only thing Prevayler provides is invulnerability for you business
objects. All other things you must/can do as if accessing POJOs in
RAM. No more, no less.


> When you change
> your schema, you have to change the program that reads in the data so
> it can handle old data formats.  Usually this is easy, but sometimes
> it is hard.  In this case, you have to define a default referrer for
> all the old data objects, since they won't have a referrer field.

To add or remove a field is easy. Your new class just has to declare a
static serialVersionUUID field (google it) with the same value as the
old and Java serialization will read the old state in without any
problem.

I just put serialVersionUUID = 1 on all my serializable classes and
forget about it.

Hard things are splitting a class in two, changing the superclass,
etc... For that you have to write custom code.

See you, Klaus.

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