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Date: Mon, 21 Jun 2010 16:09:25 +0200
Message-ID: <AANLkTimSKcMpPm9ThBYTlkk0kRb8heJCIWb8SdHMuWEI@mail.gmail.com>
Subject: Re: Some doubts about DataContext and memory allocation
From: "mr.abanjo" <mr.abanjo@gmail.com>
To: user@cayenne.apache.org
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You are right Aristedes.
Thansk for your support!
Davide

On Sun, Jun 6, 2010 at 10:09 AM, Aristedes Maniatis <ari@ish.com.au> wrote:

> On 23/05/10 5:25 PM, mr.abanjo wrote:
>
>> The write operation i perfrom in my site is very simple. It's just an
>> insert
>> of two fields in a single table. So maybe also singleton should work,
>>
>
> No, it is still going to be a bad idea. What happens in your application
> when in one thread you are committing the context and an in another thread
> you are in the middle of adding records to that same context?
>
> Don't have a context which lives across different threads until you really
> know what you are doing with locking.
>
> There is one time that it is common to have a singleton context: a
> read-only 'shared' context for displaying data. Developers from a WO
> background will be familiar with this approach. Cayenne doesn't have a
> special shared context, but you can use it that way if you like.
>
> Ari
>
> --
> -------------------------->
> Aristedes Maniatis
> ish
> http://www.ish.com.au
> Level 1, 30 Wilson Street Newtown 2042 Australia
> phone +61 2 9550 5001   fax +61 2 9550 4001
> GPG fingerprint CBFB 84B4 738D 4E87 5E5C  5EFA EF6A 7D2E 3E49 102A
>

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