Re: [ebxmlms-develop] Transaction Isolation Level Configuration

[Patrick Y. <kc...@ce...>]

Hi Jason,

We have committed your modifications. Thanks for your contribution.

By the way, we would like to have more understanding about Axion. You say
that it does not support transaction isolation in the current version. So,
will it support rollback mechanism? You know, if Hermes is working with a
database without commit/rollback capability, or having some deficiency in
transaction, there might be some scenario that causes harmful data
inconsistency. We may need to include some warning in the documentation or
property file in order to make the user conscious about that. What do you
think?

Regards, -Patrick
--
Patrick Yee
System Architect
Center for E-Commerce Infrastructure Development (CECID)
Dept. of Computer Science and Information Systems
The University of Hong Kong
Tel: (852) 22415674
Fax: (852) 25474611


----- Original Message -----
From: "Frankie Lam" <fr...@mi...>
To: "Patrick Yee" <kc...@ce...>
Sent: Tuesday, February 04, 2003 3:14 PM
Subject: Fw: [ebxmlms-develop] Transaction Isolation Level Configuration


>
> ----- Original Message -----
> From: "Jason van Zyl" <ja...@ze...>
> To: <ebx...@li...>
> Sent: Thursday, January 30, 2003 4:16 PM
> Subject: [ebxmlms-develop] Transaction Isolation Level Configuration
>
>
> > Hi,
> >
> > I have a tarball with modifications to hermes to allow the transaction
> > isolation level to be configured by the user if desired:
> >
> > http://www.apache.org/~jvanzyl/xa-isolation-levels.tgz
> >
> > I have modifed:
> >
> > hk.hku.cecid.phoenix.message.handler.Constants
> > hk.hku.cecid.phoenix.message.handler.DbConnectionPool
> > hk.hku.cecid.phoenix.message.handler.DiagTool
> > hk.hku.cecid.phoenix.message.handler.MessageServer
> >
> > and added:
> >
> > hk.hku.cecid.phoenix.message.handler.IsolationLevelSelector
> >
> > It simply allows users to do the following:
> >
> > <Driver>org.axiondb.jdbc.AxionDriver</Driver>
> > <User>user</User>
> > <Password>password</Password>
> > <URL>jdbc:axiondb:hermes:/tmp/hermes/db</URL>
> > <TransactionIsolationLevel>SERIALIZABLE</TransactionIsolationLevel>
> >
> > If a transaction isolation level is not specified at all or
> > misconfigured then the current behavior is employed where the most
> > rigorous isolation level is used.
> >
> > --
> > jvz.
> >
> > Jason van Zyl
> > ja...@ze...
> > http://tambora.zenplex.org
> >
> > In short, man creates for himself a new religion of a rational
> > and technical order to justify his work and to be justified in it.
> >
> >   -- Jacques Ellul, The Technological Society
> >
> >
> >
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> >
>