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Struts & Hibernate
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| | | Problem in Using Database. | Problem in Using Database. 2004-01-12 - By Jin Chun
Back
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 <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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