Two phase commit transaction using WSAD5.0 and DB2

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Two phase commit transaction using WSAD5.0 and DB2

Two phase commit transaction using WSAD5.0 and DB2

2005-04-27 - By Anuj Kumar

Back

Reply: 1 2 3 4 5 6 7 8

?
hi harish,

thanks for ur concern but for implementing distributed transaction that uses
the JTA , Application programmers has to use either XADateSource or any
database specific Api.
if u wanna more abt it u can go thru

http://publib.boulder.ibm.com/infocenter/db2help/index.jsp?topic=/com.ibm.db2
.udb.doc/ad/cjvdstxx.htm

Thanks and Regards,
Anuj

On Wed, 27 Apr 2005 Hrishikesh Barua wrote :
>Hi Anuj,
> Application programmers are not supposed to use the XADataSource
interface directly - it's used by the TransactionManager internally (in this
case, the TM inside your appserver). You should use the DataSource interface in
your application - and the appserver will take care of the transaction
management transparently, provided you use either the declarative or
programmatic model.
> If you're using EJB's you can use either of them; if you're using web
components you can use the UserTransaction API to manage your transactions. You
datasource will automatically participate in those transactions (it's the
responsibility of the appserver to make it participate in 2PC).
> Also, the appserver never exposes the actual DataSource from the driver -
this is to provide services like connection pooling and transaction management.
> Depending on the appserver, you might also have to mark the datasource as
transactional sometimes.
>
>Regards
> Hrish
> -- -- Original Message -- --
> From: Anuj Kumar
> To: A mailing list for Java(tm)2 Platform,Enterprise Edition
> Cc: Hrishikesh Barua
> Sent: Wednesday, April 27, 2005 12:54 PM
> Subject: Re: Re: Two phase commit transaction using WSAD5.0 and DB2
>
>
>
> hi Harish,
> thanx for ur reply but
> javax.sql.DataSource db2Datasource = null;
> does not work in this case since i need the instance of either
DB2XADataSource or XADataSource class to proceed with 2 phase commit
transaction Api's and DB2XADatasource class does not implement DataSource so we
can't type cast too.
> any other solution ???
>
> Thanks and Regards,
> Anuj
>
>
> On Wed, 27 Apr 2005 Hrishikesh Barua wrote :
> >Hello,
> > You should cast the object that you look up to a javax.sql.DataSource
object. Using any proprietary APIs means your app will not run on any other
appserver. In this case the object that you get back from the lookup is a WAS
datasource wrapper - which is correct.
> >
> >Declare
> > javax.sql.DataSource db2Datasource = null;
> >
> >Regards
> > Hrish
> > -- -- Original Message -- --
> > From: Anuj Kumar
> > To: J2EE-INTEREST@(protected)
> > Sent: Wednesday, April 27, 2005 11:46 AM
> > Subject: Two phase commit transaction using WSAD5.0 and DB2
> >
> >
> >
> > Hi All,
> >
> > I am trying to implement (prototype) 2 phase commit transaction protocol
using wsad5.1 and db2.i configured the DB2XADatasource provider in wsad and
when i try yo run my program i get
> > [4/27/05 11:27:13:296 GMT+05:30] 1accbc8a WebGroup E SRVE0026E:
[Servlet Error]-[A]: java.lang.ClassCastException: com.ibm.ws.rsadapter.jdbc
.WSJdbcDataSource
> > at hello.A.getDataSource(A.java:196)
> >
> > while looking up and casting the DB2XADatasource.
> >
> > My method which is supposec to return DB2XADatasource is..
> >
> > public static DB2XADataSource getDataSource(String jndiName) {
> >
> > InitialContext ctx = null;
> > DB2XADataSource db2Datasource = null;
> > Connection conn = null;
> >
> > try {
> > ctx = new InitialContext();
> >
> > db2Datasource = (DB2XADataSource) ctx.lookup(jndiName);
> >
> >
> > } catch (NamingException ne) {
> > ne.printStackTrace();
> > }
> >
> > return db2Datasource ;
> > }
> >
> > }
> >
> > can anyone Help me out ???
> >
> > Thanks a lotttt
> > Anuj
> >
> >
> >
> >
> > ======================================================================
===== To unsubscribe, send email to listserv@(protected) and include in the
body of the message "signoff J2EE-INTEREST". For general help, send email to
listserv@(protected) and include in the body of the message "help".
> >
> >===========================================================================
> >To unsubscribe, send email to listserv@(protected) and include in the body
> >of the message "signoff J2EE-INTEREST". For general help, send email to
> >listserv@(protected) and include in the body of the message "help".
> >
>
>
>
>
>
>===========================================================================
>To unsubscribe, send email to listserv@(protected) and include in the body
>of the message "signoff J2EE-INTEREST". For general help, send email to
>listserv@(protected) and include in the body of the message "help".
>

===========================================================================
To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff J2EE-INTEREST". For general help, send email to
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hi harish, 
 
thanks for ur concern but for implementing distributed transaction that uses
the JTA , Application programmers has to use either XADateSource or any
database specific Api. 
if u wanna more abt it u can go thru 
 
http://publib.boulder.ibm.com/infocenter/db2help/index.jsp?topic=/com.ibm.db2
.udb.doc/ad/cjvdstxx.htm 
 
 
Thanks and Regards, 
Anuj 
 
On Wed, 27 Apr 2005 Hrishikesh Barua wrote : 
>Hi Anuj, 
>          Application programmers are not
supposed to use the XADataSource interface directly - it's used by the
TransactionManager internally (in this case, the TM inside your appserver). You
should use the DataSource interface in your application - and the appserver
will take care of the transaction management transparently, provided you use
either the declarative or programmatic model. 
>  If you're using EJB's you can use either of them; if you're using
web components you can use the UserTransaction API to manage your transactions.
You datasource will automatically participate in those transactions (it's the
responsibility of the appserver to make it participate in 2PC). 
>  Also, the appserver never exposes the actual DataSource from the
driver - this is to provide services like connection pooling and transaction
management. 
>  Depending on the appserver, you might also have to mark the
datasource as transactional sometimes. 
> 
>Regards 
>  Hrish 
>  -- -- Original Message -- -- 
>  From: Anuj Kumar 
>  To: A mailing list for Java(tm)2 Platform,Enterprise Edition 
>  Cc: Hrishikesh Barua 
>  Sent: Wednesday, April 27, 2005 12:54 PM 
>  Subject: Re: Re: Two phase commit transaction using WSAD5.0 and DB2
 
> 
> 
> 
>  hi Harish, 
>  thanx for ur reply but 
>          javax.sql.DataSource db2Datasource =
null; 
>  does not work in this case since i need the instance of either
DB2XADataSource or XADataSource class to proceed with 2 phase commit
transaction Api's and DB2XADatasource class does not implement DataSource so we
can't type cast too. 
>  any other solution ??? 
> 
>  Thanks and Regards, 
>  Anuj 
> 
> 
>  On Wed, 27 Apr 2005 Hrishikesh Barua wrote : 
>  >Hello, 
>  >  You should cast the object that you look up to a javax
.sql.DataSource object. Using any proprietary APIs means your app will not run
on any other appserver. In this case the object that you get back from the
lookup is a WAS datasource wrapper - which is correct. 
>  > 
>  >Declare 
>  >          javax.sql.DataSource
db2Datasource = null; 
>  > 
>  >Regards 
>  >  Hrish 
>  >  -- -- Original Message -- -- 
>  >  From: Anuj Kumar 
>  >  To: J2EE-INTEREST@(protected) 
>  >  Sent: Wednesday, April 27, 2005 11:46 AM 
>  >  Subject: Two phase commit transaction using WSAD5.0 and
DB2 
>  > 
>  > 
>  > 
>  >  Hi All, 
>  > 
>  >  I am trying to implement (prototype) 2 phase commit
transaction protocol using wsad5.1 and db2.i configured the DB2XADatasource
provider in wsad and when i try yo run my program i get 
>  >  [4/27/05 11:27:13:296 GMT+05:30] 1accbc8a WebGroup 
    E SRVE0026E: [Servlet Error]-[A]: java.lang.ClassCastException:
com.ibm.ws.rsadapter.jdbc.WSJdbcDataSource 
>  >        at hello.A.getDataSource(A.java:196
) 
>  > 
>  >  while looking up and casting the DB2XADatasource. 
>  > 
>  >  My method which is supposec to return DB2XADatasource is
.. 
>  > 
>  >  public static DB2XADataSource getDataSource(String
jndiName) { 
>  > 
>  >            InitialContext ctx =
null; 
>  >            DB2XADataSource
db2Datasource = null; 
>  >            Connection conn =
null; 
>  > 
>  >            try { 
>  >                 
ctx = new InitialContext(); 
>  > 
>  >                 
db2Datasource = (DB2XADataSource) ctx.lookup(jndiName); 
>  > 
>  > 
>  >            } catch
(NamingException ne) { 
>  >                 
ne.printStackTrace(); 
>  >            } 
>  > 
>  >            return db2Datasource
; 
>  >        } 
>  > 
>  >  } 
>  > 
>  >  can anyone Help me out ??? 
>  > 
>  >  Thanks a lotttt 
>  >  Anuj 
>  > 
>  > 
>  > 
>  > 
>  >    =================================================
========================== To unsubscribe, send email to listserv@(protected)
and include in the body of the message "signoff J2EE-INTEREST". For
general help, send email to listserv@(protected) and include in the body of
the message "help". 
>  > 
>  >===============================================================
============ 
>  >To unsubscribe, send email to listserv@(protected) and include
in the body 
>  >of the message "signoff J2EE-INTEREST".  For
general help, send email to 
>  >listserv@(protected) and include in the body of the message
"help". 
>  > 
> 
> 
> 
> 
> 
>===========================================================================
 
>To unsubscribe, send email to listserv@(protected) and include in the body
 
>of the message "signoff J2EE-INTEREST".  For general help,
send email to 
>listserv@(protected) and include in the body of the message "help
". 
> 


 
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