T5: Hibernate and services

[Angelo Chen <an...@yahoo.com.hk>]

Hi,

I have some tapestry-hibernate related questions:

1) if I have two concurrent services(A and B), each has Session injected. do
A and B have their own transaction?

2) I have a table config that has a field 'nextID':

      2.1 IDService has a method 'NextID()' which get the value from
'nextID' and increment it
	  2.2 AppendSerivce which uses IDService's NextID to get a number and
assign to a new object, persist it
	
	if I have two instances of UserService(A and B) running, A will be
successful in getting a new ID while B fails because it gets the same ID as
A, any idea how to solve this problem?
	
Thanks,

Angelo 
   
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