Hi,
I'm all for client/server-enabling Hibernate if it was just this simple...
...but how do you mange transaction boundaries in this setup ?
Do you keep a transaction/connection open on the serverside to the db for the client ? or ?
/max
On Wed, 17 Nov 2004 10:02:20 +0100, Marek Mosiewicz <[EMAIL PROTECTED]> wrote:
Hi
Some time ago there was discussion here about client side usage of Hibernate.
I have been trying to adopt Hibernate to Compiere (http://www.compiere.org)
which is open source ERP system and I have this problem there.
Basicly there is client application there and application server in
Compiere.
Currently it has two workingo modes. In one client connects directly to
database fro fetching data and second (secure) in which client sends wrapped
prepaded statment to application server which checks for permissions
(rewrites query to add additional WHERE clauses to limit data).
Second one is acctually only one solution there as direct DB connection from
untrusted client is disaster there.
I have been thinking about imlementing secure client feature into Hibernate.
Session object colud be logically split into client and server modules (in
usual case there would be working as now). Client side would be responsible
for caching, change detection, resolving relations etc.
Server side module would execute queries and updates and could apply
mandatory filters on data.
This solution could also give "connected" like behaviour in client-server
environment (which is main drawback of DTOs).
That mean that client side would fetch additional relations from server in
necesssery (it would be important to fetch them in some batches for
performance) and reattach relations.
It would impact some functionality like iterators which in this case would
be probably not possible and would decrease performance when splited.
Anyway in scenarios where client is untrusted or there is only application
server connection (no access to DB connection) it would be great.
What do You think about it ?
Marek Mosiewicz http://www.jotel.com.pl
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