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From "Christopher Blythe" <cjblyth...@gmail.com>
Subject Re: Proposing an "SSB to JDBC" mode for Daytrader
Date Tue, 24 Oct 2006 17:14:55 GMT
Thanks Matt... I will go ahead and open the JIRA...

On 10/24/06, Matt Hogstrom <matt@hogstrom.org> wrote:
>
> Chris,
> I'll take a look at the patch you provided.  The best way to submit
> patches is to open a JIRA and attach the patch there.  When attaching the
> patch it will ask you to grant the patch to the ASF.  this provides a good
> trail for copyright info as well as visibility for people tracking the
> project.
>
> On Oct 24, 2006, at 11:05 AM, Christopher Blythe wrote:
>
> I know it has been a while since this thread has been visited; however, I
> finally got a chance to add a "Session Direct" mode to the DayTrader runtime
> modes. Fortunately, it did not require that many changes to the source.
>
> Here is a brief summary of the changes I made...
> - Added an inSession flag to TradeDirect class. If this flag is true, we
> skip the transaction management logic
> - Added similar logic to the KeySequenceDirect class
> - Created a new session bean (TradeJDBC) which implements the
> TradeServices interface. Each service method within this session bean
> creates a new instance of TradeDirect with inSession set to true
> - Added two additional primitives: PingServlet2Session2JDBC and
> PingServlet2Session2JDBCCollection
>
> I tested the changes out under load without any exceptions. Just for
> reference, I performed the tests on a 1 x 3.2 GHz Intel Xeon system
> (connecting to a DB2 database) and noted the following results.
>
> Direct Mode:   645 req/sec
> Session Direct Mode:   119 req/sec
>
> I have attached a patch file based off of a 10/24/2006 snapshot of
> daytrader/trunk. If you have any comments, let me know. There are probably
> some things in there that could be cleaned up (ie. comments, class names,
> etc.), but I think this does provide a good starting point.
>
> Thanks...
>
> Chris
>
> On 7/24/06, Matt Hogstrom <matt@hogstrom.org> wrote:
> >
> > I think this makes a lot of sense Chris.  I assume your adding a third
> > runtime mode as opposed to
> > removing the ejb mode?
> >
> > I'd like to start thinking about how to rearchitect DT ro be more
> > relevant.  I'd like to include a
> > Spring mode as well as update the EJBs to EJB 3.0.
> >
> > Any other thoughts out there?
> >
> > Christopher Blythe wrote:
> > > The EJB and Direct modes in Daytrader provide a good measure of how a
> > pure
> > > EJB (Session/CMP Entity) application stacks up against a pure JDBC
> > based
> > > app. However, one of the things I have felt Trade/Daytrader has always
> > > lacked is a middle ground. In my experience, I have neither seen nor
> > heard
> > > of a large number of customers out there in the market using the full
> > EJB
> > > programming model (Session and Entity beans). I think a more common
> > > customer
> > > usage scenario is the stateless session bean to JDBC model where the
> > direct
> > > JDBC calls are wrapped/managed by the SSB.
> > >
> > > I have already taken a quick stab at an implementation since all it
> > really
> > > requires is a merging of the TradeDirect and TradeBean code. I have
> > most of
> > > the operations working on a single client, but haven't performed any
> > load
> > > testing yet.
> > >
> > > Anyway, I wanted to submit the idea to group and see if there were any
> > > comments.
> > >
> >
>
>
>
> --
> "I say never be complete, I say stop being perfect, I say let... lets
> evolve, let the chips fall where they may." - Tyler Durden
> <session_jdbc.patch>
>
>
> Matt Hogstrom
> matt@hogstrom.org
>
>
>
>


-- 
"I say never be complete, I say stop being perfect, I say let... lets
evolve, let the chips fall where they may." - Tyler Durden

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