Problem in Using Database.

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Problem in Using Database.

Problem in Using Database.

2004-01-12 - By Nishidhdha Narendra Shah

Back

Reply: 1 2 3 4 5 6 7 8

But Anil, As per J2EE spec you can not start any thread form bean. U
must have to use another session bean.

Regards,
Nishi

-- --Original Message-- --
From: Anil Kumar [mailto:anil007dc@(protected)]
Sent: Monday, January 12, 2004 11:39 AM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: Problem in Using Database.

Here my problem is I am trying to invoke a Batch process from my
stateless session bean when I get a request.. In the Batch Process all I
need to do is batch update of tables and select from the tables updated
and push the results as text files to a ftp server. This process should
happen irrespective to my EJB Transaction. Frequency of this batch
process is not more than once a day.

What I am thinking is creating a Java Class (A) and instantiate from my
state less session EJB . And Class A kicks off thread for the Batch
Process when ever there is a need for it. what do you think??

Nishidhdha Narendra Shah <nishidhdha_shah@(protected)> wrote:
Hi Anil

Instead of starting thread, why don't you make another bean,
which will update and return rows and make sure its transaction
attribute RequireNew so it can start own new transaction instead of
global transaction. I guess this is the best practice. What do u say?

Nishi

-- --Original Message-- --
From: Pradeep Kumar [mailto:pradeepk@(protected)]
Sent: Monday, January 12, 2004 9:49 AM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Re: Problem in Using Database.

You are not supposed to start a thread or do anything in your
EJB. Especially if you are using XA, since this will interfere with the
XA transaction manager.

-- --Original Message-- --
From: Anil Kumar [mailto:anil007dc@(protected)]
Sent: Monday, January 12, 2004 7:15 AM
To: J2EEPATTERNS-INTEREST@(protected)
Subject: Problem in Using Database.

Hi,

I am trying to do the following.
I am using XA Datasource for DB2/390 from my application. In my
application I am having a session beans and Domain objects and Data
Access objects. we are using websphere Application Server 5.0

We are using XA Datasource because we need to insert and update
tables in multiple databases.

I had a problem when I try to update some records and try to
access the same records in the same transaction. I am getting Invocation
Exception.

Here are some questions

1) I want to create a class extending thread and start thread
from EJB state less session Brean so that I can do the update and
selection of rows from the database external to the Global Transaction

Any suggestions.

Thanks
Anil

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But Anil, As per J2EE spec you can not
start any thread form bean. U must have to use another session bean. <o:p></o:p
>

<o:p> </o:p>

Regards,<o:p></o:p>

Nishi<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

<o:p> </o:p>

-- --Original Message-- -- 
From: Anil Kumar
[mailto:anil007dc@(protected)] 
Sent: Monday, January 12, 2004
11:39 AM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Re: Problem in Using
Database.

<o:p> </o:p>

<div>

Here my problem is I am trying to invoke a Batch
process from my stateless session bean when I get a request.. In the Batch
Process all I need to do is batch update of tables and select from
the tables updated and push the results as text files to a ftp server. This
process should happen irrespective to my  EJB Transaction. Frequency
of this batch process is not more than once a day.<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

What I am thinking is creating a Java Class (A)
and instantiate from my state less session EJB . And Class A kicks off thread
for the Batch Process when ever there is a need for it.  what do
you think??<o:p></o:p>

</div>

<div>

 
Nishidhdha Narendra Shah
<nishidhdha_shah@(protected)> wrote:<o:p></o:p>

</div>

<blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in
0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'>


Hi Anil<o:p></o:p>



<o:p> </o:p>


Instead of starting
thread, why don’t you make another bean, which will update and return
rows and make sure its transaction attribute RequireNew so it can start own new
transaction instead of global transaction. I guess this is the best practice.
What do u say?<o:p></o:p>


<o:p> </o:p>


Nishi<o:p></o:p>


<o:p> </o:p>

-- --Original Message-- -- 
From: Pradeep Kumar
[mailto:pradeepk@(protected)] 
Sent: Monday, January 12, 2004
9:49 AM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Re: Problem in Using
Database.<o:p></o:p>

<o:p> </o:p>

You are not supposed to start a thread or do anything in your EJB.
Especially if you are using XA, since this will interfere with the XA
transaction
manager.<o:p></o:p>

<o:p> </o:p>

----
-Original
Message-- -- 
From: Anil Kumar
[mailto:anil007dc@(protected)] 
Sent: Monday, January 12, 2004
7:15 AM 
To:
J2EEPATTERNS-INTEREST@(protected) 
Subject: Problem in Using
Database.<o:p></o:p>

<o:p> </o:p>

Hi,<o:p></o:p>

 
<o:p></o:p>

 I am
trying to do the following. <o:p></o:p>

I am using XA
Datasource for DB2/390 from my application. In my application I am having a
session beans and Domain objects and Data Access objects. we are using
websphere Application Server 5.0<o:p></o:p>

 
<o:p></o:p>

We are using
XA Datasource because we need to insert and update tables in multiple
databases.<o:p></o:p>

 
<o:p></o:p>

I had a
problem when I try to update some records and try to access the same
records in the same transaction. I am getting Invocation Exception. <o:p></o:p>

 
<o:p></o:p>

Here are some
questions <o:p></o:p>

 
<o:p></o:p>

1) I want to
create a class extending thread and start thread from EJB state less session
Brean so that I can do the update and selection of rows from the database
external to the Global Transaction <o:p></o:p>

 
<o:p></o:p>

Any
suggestions.<o:p></o:p>

 
<o:p></o:p>

Thanks
<o:p></o:p>

Anil<o:p></o:p>

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<o:p></o:p>

DISCLAIMER: 
This message (including attachment if any) is confidential and may be
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Any unauthorized use or dissemination of this message in whole or in part is
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MindTree shall not be liable for any improper, untimely or incomplete
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