Multiple DB transaction

Hi
Weblogic 8.1sp2
I am planning to have multiple DB (A and B) updates in single transaction in Stateless bean. I know for this scenario i need to use XA drivers or 2phase commit.
1) Say if dont use either and insert to Database B fails. Will both inserts rollback and if not why ?
2) Say i use XA driver and prepare phase is sucessful. As soon as Database A is committed and before Database B is committed Database B goes down. How is this scenario handled. There will be inconsistent data.
Please explain
Thanks
cw

Cool Water wrote:
Hi
Weblogic 8.1sp2
I am planning to have multiple DB (A and B) updates in single transaction in Stateless bean. I know for this scenario i need to use XA drivers or 2phase commit.
1) Say if dont use either and insert to Database B fails. Will both inserts rollback and if not why ?If you don't use XA, our product will stop you when you try to get a connection to that second
DBMS. If you get non-transactional connections, then you are responsible for your transactional
integrity. If the insert to DBMS b fails, you would rollback the first connection too. The
problem is later: when you're done, and commit on A, but your commit on B fails. What do you do?
2) Say i use XA driver and prepare phase is sucessful. As soon as Database A is committed> and before Database B is committed Database B goes down. How is this scenario handled.
> There will be inconsistent data.
Yep. There is no protocol that can guarantee consistency across all failures. In this case
XA will log the facts, and when DBMS B is back online, this in-doubt transaction will be
recovered if possible. In some cases XA will resort to logging unrecoverable transactions
so that human intervention can be applied.
Joe Weinstein
>
Please explain
Thanks
cw

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>
cranjith kumar wrote:
> Hi all,
> Using BDC i displayed '5' payment transactions(xk01)
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> i.e. if i entered 6th and 7th details means then 4th and 5th
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hi,
Just refer the coding below for single transaction similarly you will done for two transaction.
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designed a selection screen for getting the input file name from the legacy system.Slowly review this code you will clear idea.i am updating a z field in the IT0007.:
SELECTION SCREEN *
SELECTION-SCREEN BEGIN OF BLOCK A WITH FRAME TITLE TEXT-001.
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'0007'.
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top-of-page.
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text
-->P_0369 text
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REPLACE '&3' WITH MESSTAB-MSGV3 INTO L_MSTRING.
REPLACE '&4' WITH MESSTAB-MSGV4 INTO L_MSTRING.
ELSE.
REPLACE '&' WITH MESSTAB-MSGV1 INTO L_MSTRING.
REPLACE '&' WITH MESSTAB-MSGV2 INTO L_MSTRING.
REPLACE '&' WITH MESSTAB-MSGV3 INTO L_MSTRING.
REPLACE '&' WITH MESSTAB-MSGV4 INTO L_MSTRING.
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CONDENSE L_MSTRING.
INT_ERR-PERNR = WA_0007-PERNR.
INT_ERR-MESG = L_MSTRING.
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CLEAR INT_ERR.
ENDIF.
ENDIF.
ENDIF.
ENDLOOP.
SKIP.
ENDIF.
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IF E_GROUP_OPENED = ' '.
CALL FUNCTION 'BDC_OPEN_GROUP'
EXPORTING
CLIENT = SY-MANDT
GROUP = E_GROUP
USER = E_USER
KEEP = E_KEEP
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DYNPROTAB = BDCDATA.
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QUEUE_ERROR = 2
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plz reward if useful,
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