I know what you mean when you talk about confusion. There is not
much real information out there about session management in windows
forms applications. I by now use a Session per use case and/or
a Session per form and it works good. Sure it has a little overhead
since you have to re - Get an object if you use it as parameter
for a form, but this acceptable. Every use case or every form has
an IPersistenceContext - object and every IRepository used can be
obtained form that Context. The IPersistenceContext Implementation
manages the session and the IRepository - Implementations are working
in that context. So you can easily decide and control, how long a Session will
live. I don't know if this is the "right" way to do
it and maybe someone her has another suggestion, but for me it works
fine.
Regards,
Volker
>
>Hi Jason,
>
>Thank you for your reply. That is not harsh at all. I am well aware of
>the mistake I made. I was so frustrated with linq, that
>I just had to drop it and quickly replace it with something else. Even
>without any previous experience with NHibernate/AR,
>it seemed far more intuitive and capable than Linq, and I decided to use
>it. Even with the problems I have, I don't regret one bit.
>
>I read just about everything I could find on the web about AR/NH session
>management, but most of it is talking about web apps.
>Also, a lot of it is just adding to my confusion. For example, some
>people say using one session for application is a 'time bomb',
>other people ('Hibernate in Action', IIRC) say it is just the right
>way... Another example. I found many articles suggesting Session.Clear()
>should be called after Session.Flush(), but then I find Ayende's '...if
>you're calling Clear(), you're doing something weird...'
>
>If something I wrote sounds rude or in any way inappropriate, my apologies.
>
>Again, thanks for your reply. Downloading nhprof it right away.
>
>Jason Meckley wrote:
>> This may be harsh, but your first mistake was blindly applying a
>> framework to a project which is almost complete.
>>
>>> I made a quick switch from Linq to Sql to AR near the end of a project, and
>didn't have the time to properly learn AR/NHibernate before I started using
>it.
>>>
>>
>> As for advice on what the problem may be:
>> 1. Start by reading the documentation on AR and NH session management.
>> (AR is primarily about attributes, so I venture to say most of the
>> problems are with session management). AR is not a silver bullet or
>> magic potion for data access you must understand the tool to use it
>> properly.
>> 2. Get a license for NHProf (www.nhprof.com) and profile your
>> application. This will tell you the cause of your problems. Since you
>> have now read the documentation you can begin to solve the pain
>> points.
>>
>> On May 26, 12:40 pm, vekaz turkovic <[email protected]> wrote:
>>
>>> Hi all,
>>>
>>> I am using Castle AR in a WinForms application. I made a quick switch
>>> from Linq to Sql to AR near the end of a project, and didn't have the
>>> time to properly learn AR/NHibernate before I started using it.
>>> So, be gentle, this may be a really stupid question...
>>>
>>> Several users run the application simultaneously. I want to reload the
>>> data from the database each time a user saves something. I am getting
>>> the data using the same code when a form is first
>>> loaded, and later, after data is saved. This seemed to work ok, until I
>>> tested the app with two users using the app simultaneously. First user
>>> saves stuff, second user tries to reload the data,
>>> but he doesn't see the changes made by the first user until the app is
>>> restarted.
>>>
>>> If i dispose the current scope and create a new one, everything works
>>> perfectly, but it takes forever to complete. If I run the application on
>>> my desktop computer, the same computer where the SQL Server is,
>>> everything is fine. But, when I run it on my laptop, and connect to the
>>> server through the network, the process of saving, disposing the current
>>> scope, creating a new one and reloading the data (which is usually just
>>> several records) takes about 10 seconds.
>>>
>>> Is there any other way of forcing AR to get the data from the DB, not
>>> the cache? Or, am i doing all this completely wrong?
>>>
>>> I need to find solution to this asap, any suggestions are very welcome.
>>>
>>> Thanks in advance.
>>>
>> >
>>
>>
>
>
>>
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