How can I make a 'Rollback Point' when I Insert database.

Question

desiring on edge!

Answer 1

Hi Steven,
just to clarify everything done in one dbadapter invoke uses a single atomic database transaction.
We have no support right now for the jdbc 'savepoint' feature, but from your explanation it seems you want the dbadapter write to be rolled back if the bpel process itself fails.
There is a way to do this, by configuring the dbadapter to bind its transaction to the global bpel instance transaction.
This JTAInsert is not shipped with the ga samples but here is the README:
This is an advanced sample.
Follow the steps to create the Merge sample, but then add a second duplicate
merge invoke.
Attempting to do two duplicate merges of the same object will lead to the
following:
-If the row (title) exists then two duplicate updates will be made.
-If the row (title) does not exist then two inserts will be attempted. The
second insert will fail, causing the first insert to be rolled back aswell.
The only other difference is to add the following adapter instance to your
oc4j-ra.xml and use it instead of eis/DB/BPELSamples:
     <connector-factory location="eis/DB/BPELSamplesDataSource" connector-name="Database Adapter">
          <config-property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
          <config-property name="connectionString" value="jdbc:oracle:thin:@localhost:1521:orcl"/>
          <config-property name="userName" value="system"/>
          <config-property name="password" value="any"/>
          <config-property name="minConnections" value="5"/>
          <config-property name="maxConnections" value="5"/>
          <config-property name="minReadConnections" value="1"/>
          <config-property name="maxReadConnections" value="1"/>
          <config-property name="usesExternalConnectionPooling" value="true"/>
          <config-property name="dataSourceName" value="jdbc/BPELSamplesDataSource"/>
          <config-property name="usesExternalTransactionController" value="true"/>
          <config-property name="platformClassName" value="oracle.toplink.internal.databaseaccess.Oracle9Platform"/>
          <config-property name="usesNativeSequencing" value="true"/>
          <config-property name="sequencePreallocationSize" value="50"/>
          <config-property name="tableQualifier" value=""/>
     </connector-factory>
Notice the following key properties are set:
          <config-property name="usesExternalConnectionPooling" value="true"/>
          <config-property name="dataSourceName" value="jdbc/BPELSamplesDataSource"/>
          <config-property name="usesExternalTransactionController" value="true"/>
Issues:
This works only for "Merge" operation. "Insert" operation does not.
When you run this and chose a new title, the first insert is rolled back correctly
but then the instance does not appear in the bpel console. Likely because the dehydration/auditing is also rolled back.
Looking for it resulted in:
<2005-05-25 15:16:24,518> <ERROR> <default.collaxa.cube> <BaseCubeSessionBean::l
ogError> Error while invoking bean "finder": Instance not found in datasource.
The process domain was unable to fetch the instance with key "17da72ea26ff041b:d
09ad3:10410ffa8e2:-7fe6" from the datasource.
Please check that the instance key "17da72ea26ff041b:d09ad3:10410ffa8e2:-7fe6" r
efers to a valid instance that has been started and not removed from the process
domain.
To verify:
run polsql @122.DBAdapter/sql/setup.sql first
then run polslq and
select title from movies;
The title you inserted should not appear if the first insert was rolled back.
Thanks
Steve