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Need help with Transactions

Pappu Kumar
Ranch Hand

Joined: Oct 01, 2002
Posts: 69
I am using Weblogic 7.0 server. And Sybase 12.5 Database.
Here is my scenario :
Say i have three entities : City , Inhabitant and Addresses
If i delete a City , i have to delete all its Inhabitant and the Inhabitant's Addresses. (One Inhabitant can have multiple Addresses).
Its also possible to delete just the Inhabitant and hence we have to delete his Addresses.....also we can just delete just the Address.
Now of all these Entities , Addresses is not dependent on any other Entitiy....so it wouldnt start its own transaction. But City and Inhabitant both would need to start a new UserTransaction. But the problem is.....how do i know from within Inhabitant, if i am being called from City's UserTransaction or i have to start my own UserTransaction.
Hope i made it clear.....if you have ant better suggestions on how to implement this...do let me know .
Avi Abrami
Ranch Hand

Joined: Oct 11, 2000
Posts: 1121

Hi Pappu,
Not sure if this is the answer you are looking for, but your entity bean implements the EntityBean interface. This interface contains the "setEntityContext()" method, which receives a parameter of type EntityContext. The super interface of "EntityContext" is EJBContext. This interface ("EJBContext") contains the "getUserTransaction()" method, which returns a UserTransaction. And the "UserTransaction" interface contains the "getStatus()" method -- which returns an integer that indicates the current transaction status (including whether there is no current transaction).
Hope this helps.
Good Luck,
Avi.
[ March 09, 2004: Message edited by: Avi Abrami ]
 
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subject: Need help with Transactions
 
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