Question
Container managed transaction VS Bean managed transaction difference
Hi
I have found the below in the LSA guide:
in BMT: A subsequent assignment or any other subsequent business operation can then rely on the results of the database write operations.
in CMT: No business operation within the transaction, yet occur
after the EJB response is sent, can rely on the results of the database write operations from the same transaction.
I dint get the exact intent of the statements.
What could be the usecase to use BMT vs CMT?
***Moderator Edit-Vidyaranjan: Moved from PSC to Academy***
Thanks for the reply.
I still don't get the intent behind saying "can then rely on the results of the database write operations"
Accepted Solution
This simply means that, within a CMT transaction, a downstream query cannot retrieve data written to the database by an upstream write because that data will not be committed to the database until the end of the CMT transaction.
CMT is used by services that support distributed transaction, JMS for example. The container oversees those transactions. If any transaction fails the entire distributed transaction is rolled back.