[JBoss Seam] - Navigating through results pages problem
by idylle
Hi,
I'm using the Hibernate Tools Code Generation to generate a seam application. It's working fine but I've got a problem when navigating through the results of a research.
My case is :
In the "Find page", I fill in criterias, then click on "Find". I get several answers and the button "next page" is activated. If I click about 10 or 15 times on the "Next page" or the "Previous page" button, I get an error. It doesn't appear each time at the same moment and the error is different each time, of type :
anonymous wrote : javax.faces.FacesException: Cannot get value for expression '#{collectivitesSelector.createEnabled}'
or
anonymous wrote : 11:13:57,442 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
| javax.faces.FacesException: Cannot get value for expression '#{collectivites.departements.dptidt}'
or
anonymous wrote : javax.servlet.ServletException: Cannot get value for expression '#{collectivites.coltlc}'
(My object name is "Collectivites")
I'm using :
Eclipse 3.2.1
Hibernate tools 3.2.0.beta9a
Seam 1.1.5
JBoss 4.0.5
Have you got any idea on how to solve this please?
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19Â years, 1Â month
[JCA/JBoss] - Usage of LastResource Inteface leads to warning
by ypsilon
Hello.
Since I am kind of new to JTA and I have to implement it a at a fairly vital part (payment) of our system I'd like to ask you if I should pay more attention to the following warning
"Prepare called on a local tx. Use of local transactions on a jta transaction with more than one branch may result in inconsistent data in some cases of failure."
In short: This error occurs whenever I enlist an XAResource which implements the LastResource interface in the transaction. So the first question is:
------> Is this normal?
(I did not find a way to avoid the message with the LastResource interface implemented, but from what I learned so far that's the way to use the Interface.)
Since I am interested in any opinion / suggestion I can get here is a more in-depth description:
There is an external service provider which handles our payments. In order to communicate with that provider the idea was to implement an XAResource which does the communication and thereby ensures that the payment is done when the database transaction is done. The protocol the ServiceProvider uses is somewhat limited when it comes down to error recovery. Because of that it seems to be pretty hard to implement a real, stable XAResource adapter. 1)
Since I cannot implement a complete XAResource I wanted to implement the LastResource interface. By that I can do all the communication after all prepare() calls are done (in our case only the DB prepare so far.) My guess is that through this the risk of an incosistent state after the end of the transaction is minimized.
So here comes the second question:
Any opinions about this solution?
;-)
Thanks in advance
PeeR
PS: If one of the developers is reading this here is a suggestion. Put the XID and or class of the resource in this warning. You have no clue how to identify which resource it is that causes the trouble...
-----------------------------
1) The protocol used is fairly simple: first step is to authorize a transaction, second step is to commit the transaction. Both is done via Http. In theory a cancellation request can be done afterwards - but only within a very small timeframe so using that is not really an option.
Apart from that in some scenarios the first step has to be done outside the transaction.
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19Â years, 1Â month