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From Matt Hogstrom <m...@hogstrom.org>
Subject Re: [jira] Updated: (DAYTRADER-8) Small difference in sync order processing between Direct and EJB mode
Date Tue, 25 Jul 2006 18:23:04 GMT
Chris, thanks for the patch.  One thing that would be helpful to me is when you attach the
patch you 
name it with the JIRA as the first part of the patch.  Its not required just makes my life
 a little 
easier when I've got a bunch of patches.

Thanks!

Matt

Christopher James Blythe (JIRA) wrote:
>      [ http://issues.apache.org/jira/browse/DAYTRADER-8?page=all ]
> 
> Christopher James Blythe updated DAYTRADER-8:
> ---------------------------------------------
> 
>     Attachment: orderPatch.diff
> 
> Sorry for the delay in posting this... I wanted to make sure I used the proper procedure
for creating the patch before posting (thanks to Jason for his input). Also, tested this under
load and there seemed to be no ill effects.
> 
>> Small difference in sync order processing between Direct and EJB mode
>> ---------------------------------------------------------------------
>>
>>                 Key: DAYTRADER-8
>>                 URL: http://issues.apache.org/jira/browse/DAYTRADER-8
>>             Project: DayTrader
>>          Issue Type: Bug
>>          Components: EJB Tier
>>    Affects Versions: 1.1
>>            Reporter: Christopher James Blythe
>>            Priority: Minor
>>         Attachments: orderPatch.diff
>>
>>
>> I have noticed a slight difference in the behavior of synchronous  buy/sell operations
between EJB and JDBC mode. For example, in Sync/Direct mode, if you perform a buy operation
the resulting output of the NewOrder pages will look something like the following...
>> 271002  	open  	2006-07-19 17:04:50.921  	null  	24.95  	buy  	s:0  	100.0
>> If I perform the same operation in Sync/EJB mode, I get the following...
>> 272002  	closed  	2006-07-19 17:12:25.156  	2006-07-19 17:12:25.156  	24.95  	buy
 	s:1  	100.0
>> Notice the differences between the two...
>> - the status (closed vs. open)
>> - the completion date (null vs an actual value)
>> I have looked into the code for this and it seems that the EJB version actually returns
a refreshed version of the bean (as performed by the ejb container). However, in the JDBC/Direct
code we perform the necessary updates to the order via the order processing apis, but we never
update the actual local copy of the order bean before returning this.
>> I realize this may be a minor detail, but it does point out a slight difference between
the execution of Direct/EJB mode. The simple solution is to re-fetch the order data before
the buy/sell operations are completed in the TradeDirect.java code, similar to the following...
>> orderData = getOrderData(conn, orderData.getOrderID().intValue());
>> 			
>> if (txn != null) {
>> 	if ( Log.doTrace() )
>> 		Log.trace("TradeDirect:sell committing global transaction");		
>> 		txn.commit();
>> 		setInGlobalTxn(false);
>> 	}
>> else	
>> 	commit(conn);
>> Will attach a patch with this code tomorrow morning...
> 

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