On Apr 25, 2008, at 9:18 AM, Riccardo Cohen wrote:
> all right,
> and what happens if 2 or 3 threads running the same code, call
> m_ut.Begin in the same time ? I suppose then that they all go in the
> same transaction ?
No, each thread gets its own transaction. Transactions are always
thread-based.
The UserTransaction object is thread-aware, so it automatically
handles each thread separately.
-- Scott
>
>
> Scott Ferguson wrote:
>> On Apr 25, 2008, at 5:29 AM, Riccardo Cohen wrote:
>>
>>> Thanks for this information.
>>> The member is static for now because it is the same transaction used
>>> in
>>> all servlets.
>>
>> The UserTransaction is basically a singleton, so you can use @In
>> UserTransaction anywhere and it'll all become part of the same
>> transaction. One of the main points of transactions is that all of
>> your resources which commit together are in the same transaction,
>> i.e.
>> all-or-none commit.
>>
>> Normally, static is discouraged, though, as wesley said.
>>
>> -- Scott
>>
>>> Anyway most of my servlets have static only methods.
>>>
>>> wesley wrote:
>>>> Hi Riccardo,
>>>>
>>>> I'm using
>>>> @In
>>>> TransactionManager transaction;
>>>> in servlets and @Component
>>>>
>>>> and it proved to be robust and of good performance.
>>>>
>>>> ps> I don't think "static" is a good directive.
>>>>
>>>> -Wesley
>>>>
>>>> ----- Original Message -----
>>>> From: "Riccardo Cohen" <[EMAIL PROTECTED]>
>>>> To: "General Discussion for the Resin application server"
>>>> <resin-interest@caucho.com>
>>>> Sent: Friday, April 25, 2008 4:31 PM
>>>> Subject: [Resin-interest] question about UserTransaction
>>>>
>>>>
>>>> Hi
>>>> I've learnt how to use UserTransaction, and even if it works, I
>>>> don't
>>>> know if my implementation has good performance.
>>>>
>>>> I added a single UserTransaction in one of my servlets :
>>>>
>>>> public class globalaction extends HttpServlet
>>>> {
>>>> @In public static UserTransaction m_ut;
>>>>
>>>> I use this m_ut from all servlets for all requests. Is this
>>>> safe ? Or
>>>> should I declare one UserTransaction in each servlet (or even one
>>>> for
>>>> each request ?)
>>>>
>>>> Thanks for any information
>>>>
>>> --
>>> Très cordialement,
>>>
>>> Riccardo Cohen
>>> -------------------------------------------
>>> Articque
>>> http://www.articque.com
>>> 149 av Général de Gaulle
>>> 37230 Fondettes - France
>>> tel : 02-47-49-90-49
>>> fax : 02-47-49-91-49
>>>
>>>
>>>
>>> _______________________________________________
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>>> resin-interest@caucho.com
>>> http://maillist.caucho.com/mailman/listinfo/resin-interest
>>
>>
>>
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>
> --
> Très cordialement,
>
> Riccardo Cohen
> -------------------------------------------
> Articque
> http://www.articque.com
> 149 av Général de Gaulle
> 37230 Fondettes - France
> tel : 02-47-49-90-49
> fax : 02-47-49-91-49
>
>
>
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> resin-interest@caucho.com
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