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| | | Problem in Using Database. | Problem in Using Database. 2004-01-12 - By Anil Kumar
Back
Thanks Jin.
This really helped me out...
Thanks
Anil
Jin Chun <ByungChun@(protected)> wrote:
The easiest thing to do IMHO is to have your thread started in the web tier
via a servlet, using something like quartz (an open source j2ee scheduler).
Have your code
running in the web tier use a facade to invoke the logic in a stateless
session bean.
Jin
Jin Chun
Vice President: Sr. Systems Architect
State Street ? Global Link | www.statestreet.com | www.globallink.com
617.664.1695 | byungchun@(protected)
SCJA SCJP OCP-DBA
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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.
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 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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<DIV>Thanks Jin.</DIV>
<DIV> </DIV>
<DIV>This really helped me out...</DIV>
<DIV> </DIV>
<DIV>Thanks </DIV>
<DIV>Anil<BR><BR><B><I>Jin Chun <ByungChun@(protected)></I></B> wrote
:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER
-LEFT: #1010ff 2px solid">The easiest thing to do IMHO is to have your thread
started in the web tier<BR>via a servlet, using something like quartz (an open
source j2ee scheduler).<BR>Have your code<BR>running in the web tier use a
facade to invoke the logic in a stateless<BR>session bean.<BR><BR>Jin<BR><BR
>Jin Chun<BR><BR><BR>Vice President: Sr. Systems Architect<BR><BR><BR>State
Street ? Global Link | www.statestreet.com | www.globallink.com<BR><BR><BR>617
.664.1695 | byungchun@(protected)<BR><BR><BR>SCJA SCJP OCP-DBA<BR><BR><BR>
<BR><BR><BR><BR><BR><BR>Confidentiality Notice: The information contained in the
email is intended<BR>for the confidential use of the above-named recipient(s).
If the reader of<BR>this message is not the intended recipient or person
responsible for<BR>delivering it to the intended recipient, you are hereby
notified that you<BR>have received this communication in error, and
that
any review,<BR>dissemination, distribution, or copying of this communication
is strictly<BR>prohibited. If you have received this in error, please notify
the sender<BR>immediately and destroy this message.<BR><BR><BR>|-- ------+-- --
-- ---- ---- ---- ---- ---- ---><BR>| | Nishidhdha Narendra Shah |<BR>| |
<NISHIDHDHA_SHAH@(protected)|<BR>| | COM> |<BR>| | Sent by: An interest list|<BR
>| | for Sun Java Center J2EE |<BR>| | Pattern Catalog |<BR>| | <J2EEPATTERNS
-INTEREST@(protected)|<BR>| | VA.SUN.COM> |<BR>| | |<BR>| | |<BR>| | 01/12/2004 01:10
AM |<BR>| | Please respond to An |<BR>| | interest list for Sun |<BR>| | Java
Center J2EE Pattern |<BR>| | Catalog |<BR>| | |<BR>|-- ------+-- ---- ---- ----
-- ---- ---- ------><BR>>-- ---- ---- ---- ---- ---- ---- ---- ---- ------
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
-- ---- ----|<BR>| |<BR>| To: J2EEPATTERNS-INTEREST@(protected) |<BR>| cc: |<BR
>| Subject: Re: Problem in Using Database.
|<BR>>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----|<BR><BR
><BR><BR><BR>But Anil, As per J2EE spec you can not start any thread form bean.
U must<BR>have to use another session bean.<BR><BR><BR><BR><BR><BR>Regards,<BR>
<BR><BR>Nishi<BR><BR><BR><BR><BR><BR><BR><BR><BR><BR><BR><BR>-- --Original
Message-- --<BR>From: Anil Kumar [mailto:anil007dc@(protected)]<BR>Sent: Monday,
January 12, 2004 11:39 AM<BR>To: J2EEPATTERNS-INTEREST@(protected)<BR>Subject:
Re: Problem in Using Database.<BR><BR><BR><BR><BR><BR>Here my problem is I am
trying to invoke a Batch process from my<BR>stateless session bean when I get a
request.. In the Batch Process<BR>all I need to do is batch update of tables
and select from the tables<BR>updated and push the results as text files to a
ftp server. This<BR>process should happen irrespective to my EJB Transaction.
Frequency<BR>of this batch process is not more
than
once a day.<BR><BR><BR><BR><BR><BR>What I am thinking is creating a Java Class
(A) and instantiate from<BR>my state less session EJB . And Class A kicks off
thread for the<BR>Batch Process when ever there is a need for it. what do you
think??<BR><BR><BR><BR>Nishidhdha Narendra Shah <NISHIDHDHA_SHAH@(protected)
>wrote:<BR>Hi Anil<BR><BR><BR><BR><BR><BR>Instead of starting thread, why don't
you make another bean, which<BR>will update and return rows and make sure its
transaction attribute<BR>RequireNew so it can start own new transaction instead
of global<BR>transaction. I guess this is the best practice. What do u say?<BR>
<BR><BR><BR><BR><BR>Nishi<BR><BR><BR><BR><BR><BR>-- --Original Message-- --<BR
>From: Pradeep Kumar [mailto:pradeepk@(protected)]<BR>Sent: Monday, January 12,
2004 9:49 AM<BR>To: J2EEPATTERNS-INTEREST@(protected)<BR>Subject: Re: Problem
in Using Database.<BR><BR><BR><BR><BR><BR>You are not supposed to start a
thread or do anything in your<BR>EJB. Especially
if you
are using XA, since this will interfere<BR>with the XA transaction manager.<BR
><BR><BR><BR><BR><BR>-- --Original Message-- --<BR>From: Anil Kumar [mailto
:anil007dc@(protected)]<BR>Sent: Monday, January 12, 2004 7:15 AM<BR>To:
J2EEPATTERNS-INTEREST@(protected)<BR>Subject: Problem in Using Database.<BR>
<BR><BR><BR><BR><BR>Hi,<BR><BR><BR><BR><BR><BR>I am trying to do the following.
<BR><BR><BR>I am using XA Datasource for DB2/390 from my<BR>application. In my
application I am having a session<BR>beans and Domain objects and Data Access
objects. we are<BR>using websphere Application Server 5.0<BR><BR><BR><BR><BR>
<BR>We are using XA Datasource because we need to insert and<BR>update tables in
multiple databases.<BR><BR><BR><BR><BR><BR>I had a problem when I try to update
some records and<BR>try to access the same records in the same transaction.<BR
>I am getting Invocation Exception.<BR><BR><BR><BR><BR><BR>Here are some
questions<BR><BR><BR><BR><BR><BR>1) I want to create a class ex
tending
thread and start<BR>thread from EJB state less session Brean so that I can<BR
>do the update and selection of rows from the database<BR>external to the Global
Transaction<BR><BR><BR><BR><BR><BR>Any suggestions.<BR><BR><BR><BR><BR><BR
>Thanks<BR><BR><BR>Anil<BR><BR><BR><BR><BR><BR>Do you Yahoo!?<BR>Yahoo! Hotjobs:
Enter the "Signing Bonus" Sweepstakes<BR>======================================
============================== <BR><BR>ompanion Site: http://www
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(including attachment if any) is confidential and<BR>may be privileged. Before
opening attachments please check<BR>them for viruses and defects. MindTree
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es
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