Record does not get locked on update in a transaction

Hi ...
Lets say I have a session bean method with "Required" Transaction as follows:
public void method1()
entityBean1.setFieldA("something"); //record1
entityBean1.setFieldB("something"); //record1
entityBean2.setFieldZ("something");
Now, suppose one client thread "A" is executing this method and updating "record1"
and the Tx is still happening...
Lets suppose another client thread "B" simultaneously calls the same method to update
the same record "record1"...
what will happen now...since A is already in a Tx updating record1, what happens
to B...
shouldn't there be a lock on the record which A is updating till the Tx gets commited
, and only then B should be able to update that record...?
Is my understanding correct ??
I did a test with weblogic and this does not seem to be happening..
whatz missing guys ...or am i barking up the wrong tree ?
Thanx,
Krish

READ_COMMITED.
Emmanuel Proulx wrote:
The default is 'database' concurrency strategy, with isolation level set by
the database. I don't know the default for Oracle 8i.
My point was you can set it.
Good luck,
Emmanuel
"Krish Venkat" <[email protected]> wrote in message
news:[email protected]..
I have not set either of that property in my entity bean...so I guess itshud pick
up the default ...I use Oracle 8i...
Krish
"Emmanuel Proulx" <[email protected]> wrote:
This all depends on how things are configured:
- database transaction isolation level (tag <transaction-isolation> of
weblogic-ejb-jar.xml)
-concurrency strategy (tag <concurrency-strategy> of
weblogic-ejb-jar.xml)
See DTD for more details. (weblogic?00-ejb-jar.dtd files in weblogic.jar)
Emmanuel
"Krish Venkat" <[email protected]> wrote in message
news:3cf6e7f4$[email protected]..
Hi ...
Lets say I have a session bean method with "Required" Transaction asfollows:
public void method1()
entityBean1.setFieldA("something"); //record1
entityBean1.setFieldB("something"); //record1
entityBean2.setFieldZ("something");
Now, suppose one client thread "A" is executing this method and
updating
"record1"
and the Tx is still happening...
Lets suppose another client thread "B" simultaneously calls the samemethod to update
the same record "record1"...
what will happen now...since A is already in a Tx updating record1,
what
happens
to B...
shouldn't there be a lock on the record which A is updating till the Txgets commited
, and only then B should be able to update that record...?
Is my understanding correct ??
I did a test with weblogic and this does not seem to be happening..
whatz missing guys ...or am i barking up the wrong tree ?
Thanx,
Krish
Rajesh Mirchandani
Developer Relations Engineer
BEA Support

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