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Subject: RE: Extension to OpenJPA for distributed databases
Date: Wed, 6 Feb 2008 13:03:47 -0800
Message-ID: <3992B07C0590B548BB294D31768A1DA2D88A6B@repbex01.amer.bea.com>
In-Reply-To: <7262f25e0802061232oa118114w709b416f0390b589@mail.gmail.com>
Thread-Topic: Extension to OpenJPA for distributed databases
Thread-Index: Acho/4Bg3X18OBgiQN2N0fXHDQPSgAAAx44g
References: <3992B07C0590B548BB294D31768A1DA2D88917@repbex01.amer.bea.com>
 <7262f25e0802061232oa118114w709b416f0390b589@mail.gmail.com>
From: "Pinaki Poddar" <ppoddar@bea.com>
To: <dev@openjpa.apache.org>

1. The XA transaction manager is pluggable and not active by default.  
2. The DistributedStoreManager in RESOURCE_LOCAL txn serailly commits
across all slices. This is the default behavior (same as Hibernate
Shards).

> I see that you changed some stuff outside of the new openjpa-slice
module. 
Yes. modified root pom.xml to add openjpa-slice as a module.
I have added one chapter in the doc (ref_guide_slice.xml).

In codebase, one and only critical change was made six weeks ago to
allow JDBCStoreManger to use a configuration separate from that of its
context.

 
-----Original Message-----
From: Patrick Linskey [mailto:plinskey@gmail.com] 
Sent: Wednesday, February 06, 2008 2:33 PM
To: dev@openjpa.apache.org
Subject: Re: Extension to OpenJPA for distributed databases

Hi,

I see that you've gone a head and done the commit for this. Some
questions:

1. At one point, Slice had a mock XA transaction manager in it. Has this
been removed? I strongly feel that OpenJPA should not be in the business
of XA transaction management.

2. I see that you changed some stuff outside of the new openjpa-slice
module. Do these changes mean that slice is now part of 1.1.0? I think
that we might want to spend more time reviewing and discussing before
including this in a shipping product. One way to address this could be
by creating a branch; another could be by leaving it in trunk but not
changing the build.

-Patrick

On Feb 6, 2008 9:10 AM, Pinaki Poddar <ppoddar@bea.com> wrote:
> Hi,
>   Some of you have reviewed this extension. Based on your responses, I

> have integrated openjpa-slice module with OpenJPA in my local 
> environment.
> I am planning to commit the same to the repository by end of today.
>
>   Regards --
>
>
> -----Original Message-----
> From: Pinaki Poddar
> Sent: Wednesday, January 30, 2008 5:45 PM
> To: 'dev@openjpa.apache.org'
> Subject: Extension to OpenJPA for distributed databases
>
> Hi,
>   I would like to add an extension of OpenJPA that allows an 
> application to transact against a set of distributed, possibly 
> hetereogenous, horizontally-partitioned databases [2]. The project is 
> named as Slice and is similar in scope to Hibernate Shards.
>   The development codebase so far been maintained in Apache Lab 
> repository and given its current state I propose to add the codebase 
> to a new openajpa-slice module.
>
>   I request you to review current state of its implementaion [1] and 
> express your opinion/views on feasibility of my proposal.
>
>   Regards --
>
> Pinaki
>
> [1] Slice website:
> http://people.apache.org/~ppoddar/slice/site/index.html
>
> [2] dev2dev blog:
> http://dev2dev.bea.com/blog/pinaki.poddar/archive/2008/01/slice_openjp
> a_
> f_1.html
>
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--
Patrick Linskey
202 669 5907

Notice:  This email message, together with any attachments, may contain information  of  BEA Systems,  Inc.,  its subsidiaries  and  affiliated entities,  that may be confidential,  proprietary,  copyrighted  and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it.