Problem in Using Database.

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Problem in Using Database.

Problem in Using Database.

2004-01-12 - By Anil Kumar

Back

Reply: 1 2 3 4 5 6 7 8

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:

v\:* {behavior:url(#default#VML);}o\:* {behavior:url(#default#VML);}w\:*
{behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}
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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<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.</DIV>
<DIV> </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??</DIV>
<DIV> Nishidhdha Narendra Shah <nishidhdha_shah@(protected)>
 wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER
-LEFT: #1010ff 2px solid">
<META content=Word.Document name=ProgId>
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<META content="Microsoft Word 10" name=Originator><LINK href="cid:filelist.xml
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" rel=Edit-Time-Data>
<STYLE>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</STYLE>

<STYLE>

</STYLE>

<DIV class=Section1>
Hi Anil<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><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>
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>
<DIV style="MARGIN-LEFT: 0.5in">
<DIV class=MsoNormal style="MARGIN-LEFT: 0.5in; TEXT-ALIGN: center" align
=center>
<HR align=center width="100%" SIZE=1>
</DIV></DIV>
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:p></o:p>
DISCLAIMER: This message (including attachment if any) is
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message from your system. Any unauthorized use or dissemination of this message
in whole or in part is strictly prohibited. Please note that e-mails are
susceptible to change and MindTree shall not be liable for any improper,
untimely or incomplete transmission.<o:p></o:p></DIV>========
============================================================ Companion Site:
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