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Accessing UserTransaction object on JBoss 4.0.1 from remote client

 
suparna.venkat
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Hi,

Can anyone help me out here?

I am using JBoss 4.0.1 and I've deployed a Datasource "Test" to connect to Postgres database.

This is what my java client which is running in JVM outside JBoss.

1. Lookup "UserTransaction" object in JBoss namespace.
2. Lookup "Test" datasource in JBoss namespace. (With JBoss 3.2.x it is not possible, it's possible only in JBoss 4.0.x by setting "<use-java-context>false</use-java-context>" in -ds.xml to deploy dataosure.)
3. Begin UserTransaction, Get connection object and do some database updates & either commit or rollback usertransaction.
4. But UserTransaction is not working. My database updates are always committed.
I tested the same thing in EJB deployed on the JBoss and it works fine. The only problem is when I control the user transaction from outside JBoss JVM. I get no errors/exceptions but it doesnt work.

Here is the snippet of code.

***********************************************
InitialContext ctx = new InitialContext();
Object o1 = ctx.lookup("AgileITPTest");
DataSource datasource = (DataSource) PortableRemoteObject.narrow(o1, DataSource.class);
Object o = (UserTransaction) ctx.lookup("UserTransaction");
UserTransaction userTransaction = (UserTransaction)PortableRemoteObject.narrow(o, UserTransaction.class);

userTransaction.begin();
Connection conn = datasource.getConnection();
stat = conn.createStatement();
String sql_Outer = "insert into transac_order values(6421)";
stat.executeUpdate(sql_Outer);
userTransaction.rollback();
conn.close();
} catch(Exception sle) {
sle.printStackTrace();
}
**********************************************************


Thanks in advance,
Suparna
 
suparna.venkat
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Hi,

I've found that we can not control transaction from the client side on the UserTransaction object looked up from JBoss.(Though we can start from the client, we can commit or rollback only on server side).

http://www.cenqua.com/clover/eg/jboss/report/org/jboss/test/testbean/bean/BMTStatefulBean.html

But does any other appserver(Websphere/Weblogic) support that?


Thanks,
Suparna
 
suparna.venkat
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Sorry that was a wrong URL by mistake.
Correct one:
http://docs.jboss.com/jbossas/admindevel326/html/ch4.chapt.html
 
Roger Chung-Wee
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It's generally a bad idea to start transactions from a client. Your client should invoke a bean's method in the container to do the DB update, and it is this method which should run in a transaction.
 
suparna.venkat
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Hi,

Thanks for your reply. But the requirement says that I should use commit & rollback on UserTransaction object in the client. Is there anyother alternative to achive this using anyother Application Server other than JBoss?

Thanks,
Suparna
 
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