DAO and Bean Managed

[trupti nigam]

What is the difference between the DAO and bean managed persistence?

Thanks,
Trupti

[rottscha rotti]

Hi,
the best to combine these two technologies. In BMP you write your own database dependant SQL code. By using a DAO you put all the database dependant SQL statements and connection handling in the DAO class . When you change the Database you only need to make corrections in the dao class not in the bean.

that's it - rr

[trupti nigam]

Originally posted by rottscha rabbit:

Hi,
the best to combine these two technologies.
---------------------------------------------------------------------
Can you explain how can this be achieved?
======================================================================
In BMP you write your own database dependant SQL code. By using a DAO you put all the database dependant SQL statements and connection handling in the DAO class
----------------------------------------------------------------------
I think in both cases i.e.in DAO and BMP we need to write our own SQL code.
===========================================================================

. When you change the Database you only need to make corrections in the dao class not in the bean.

that's it - rr

In BMP one has to implement all the methods of the interface.

thanks,
Trupti

[Rick O'Shay]

Originally posted by trupti nigam:
What is the difference between the DAO and bean managed persistence?

Thanks,
Trupti

Data access objects are a pattern that you can use with or without bean managed persistence. Bean managed persistence just says that you're not allowing the container to manage persistence for you.

[Bhupesh Arya]

DAO is a pattern to encapsulate all your data access logic ( all ur SQL code). As the name indicates BMP is Bean Managed Persistence, which means that the persistence will be managed by the bean, ie the programmer has to write the SQL code. It is advisable to use DAO pattern when using BMP.