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Posted to users@tapestry.apache.org by leothelion <ok...@hotmail.com> on 2011/10/05 20:00:08 UTC
SessionState problem
Hi Guys,
I have a problem in using SessionState.
Here is the thing:
@SessionState
private Sales salesItem;
@SessionState
private SalesSessionInfo ssi;
SalesSessionInfo contains a list of Sales objects. However, every time when
I add the updated salesItem to ssi, it seems that the last element in the
Sales list of ssi is pointed the salesItem.
For example, I add salesItem A to ssi, then I have
[A]
Add B, I got
[B, B]
Add C, I got
[B, C, C]
This is really weird. If I change salesItem back to like @property, it works
fine in adding, but not work for my purpose. I know SessionState is differed
by class, but in my case should I be OK?
Does anyone knows what I am missing in using SesstionState?
Regards,
Leo
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Re: SessionState problem
Posted by leothelion <ok...@hotmail.com>.
I think I found where causes the problem.
Here is the tml file:
<t:grid source="AllSales" exclude="unitPriceNumber, vatNumber, totalNumber,
id" row="salesItem" add="action" reorder=" sku, desc, qty, freetext,
returnorsale, unitprice, vat, total">
<p:skuCell>
<t:actionlink t:id="edit"
context="salesItem.id">${salesItem.sku}</t:actionlink>
</p:skuCell>
...
...
</t:grid>
If I erase the ' row="salesItem" ', then the adding problem is gone. But I
cannot use a SessionState instance as a row in grid component? If not, what
is the alternative way to do so?
Anyone got any idea?
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Re: SessionState problem
Posted by Lenny Primak <lp...@hope.nyc.ny.us>.
Tapestry objects's instance variables will never leak from user to user..
You have to try pretty hard to make that work.
Whether its' @Persist, @SessionState, @SessinoAttribute,
or just plain field, it will never leak.
On Oct 5, 2011, at 5:22 PM, leothelion wrote:
> Hi Thiago,
>
> Thanks for your reply. I will try it.
>
> Just a question out of this topic. I use salesItem as SessionState is
> because I don't what it to be shared by the other users when they are
> loading the same page. That's why I came up with the idea of SessionState. I
> don't know if there another way (or easier way) other than setting salesItem
> to be SessionState.
>
> Thanks again!
>
> Leo
>
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Re: SessionState problem
Posted by leothelion <ok...@hotmail.com>.
Hi Thiago,
Thanks for your reply. I will try it.
Just a question out of this topic. I use salesItem as SessionState is
because I don't what it to be shared by the other users when they are
loading the same page. That's why I came up with the idea of SessionState. I
don't know if there another way (or easier way) other than setting salesItem
to be SessionState.
Thanks again!
Leo
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Re: SessionState problem
Posted by leothelion <ok...@hotmail.com>.
"If you did private SalesItem salesItem = new SalesItem()"
You got me!!!:-P
Thank you very much.
On 10/5/2011 3:12 PM, Thiago H de Paula Figueiredo [via Tapestry] wrote:
> On Wed, 05 Oct 2011 19:00:05 -0300, okramlee <[hidden email]
> </user/SendEmail.jtp?type=node&node=4874465&i=0>> wrote:
>
> > Hi Thiago,
>
> Hi!
>
> > " If a field isn't @SessionState, it is completely thread-safe, not
> > being shared between users."
> > Yeah, that was what I thought about. But it did share the object
> between
> > users even though I remove everything and keep salesItem plain there. I
> > think I did something wrong in my code.
>
> If you did private SalesItem salesItem = new SalesItem(), which is a
> common newbie error, that is expected. Never, never, never initialize a
> page or component field in its initialization.
>
> --
> Thiago H. de Paula Figueiredo
> Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
> and instructor
> Owner, Ars Machina Tecnologia da Informação Ltda.
> http://www.arsmachina.com.br
>
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