Hi,
I am Hibernate user and really want to migrate to Cayenne.
My reasons to migrate are;
- Cayenne seem to have distributed "shared" cache support integrated.
I am developing multi-application that has separate struts and web
services application contexts. Cayenne, as I understand uses Javagroups
and you can configure it to have distributed cache.
With hibernate you have to use 3rd party cache (OSCache) and configure
it additionally.
- Easier higher-level syntax. In Hibernate you have make more
unnecessary method calls.
- Better community. Hibernate forums are full of two types of users-
total beginners or snobs who reply only if your problem look like a bug
in hibernate.
I have a question about Cayenne key generation;
- Can I use Hilo-type key id generator with Cayenne?
According to chapter 4.7 Cayenne has "generated by Cayenne", provided by
database, derived.
In Hibernate you have a big choice of generators, you can use hilo,
uuid, increment, etc.
I need to have portable key id generation. Portable to other DB and API.
In past, I have achieved it (with Hibernate) by using hilo: for table
"data", I have sequence table "data_seq" which have one field and one
record. Then I set in Hibernate mapping: generator="hilo"
table="data_seq". Hibernate increments and updates value in "data_seq"
table. This works with any possible database and is perfectly portable
to other APIs.
Now with Cayenne I can't use native DB generators and auto_increment.
I also don't want to use Cayenne's "Generate Primary Key Support"
(Chapter 4.6) which uses special table and therefore it's
Cayenne-specific and not transparently portable to other API.
Is there a way that I am missing?
Thank you.
Roman.
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