HI
The whole point of having an EJB server is to help you manage issues like transactions
, scalability etc.
If your ejb uses bean managed transaction only then you will be able to get a handle
to the trasaction service and do your
own commit and rollback. Otherwise every thing as they call it "DECLARATIVE TXN MGMT"
....you just declare what your ejb
method's txn's props are and get it done thro the EJB server
arava
Harvey Chen wrote:
> Hi, Friends
>
> If I use JTS and JTA only, how can EJB containter "commit" or "rollback" what I have
>done?
>
> for example:
>
> ...
> UserTransaction ut = context.getUserTransaction();
> try{
> String ls_sql = "insert into TEST_USER (USER_ID,USER_NAME,DEPARTMENT ) values
>('"+ls_id+"','test1','test1 Dpt')";
> String ls_sql2 = "insert into TEST_USER (USER_ID,USER_NAME,DEPARTMENT ) values
>('"+ls_id2+"','test1','test1 Dpt')";
>
> makeConnection();
> st = conn.createStatement();
> ut.begin();
> st.executeUpdate(ls_sql);
> st.executeUpdate(ls_sql2);
> ut.commit();
>
> releaseConnection();
> }
> catch (Exception e){
> try{
> ut.rollback();
> releaseConnection();
> }
> catch (Exception ex){
> throw new EJBException ("rollback fail");
> }
> ...
>
> if the first "insert" statement succeed but the second "insert" statement fail, the
>program will run "ut.rollback();",
> but will the first "insert" rollback too?
>
> I tried many times, but I cann't "rollback" the first "insert" statement.
>
> would anyone throw me a light?
> thanks a lot!
>
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