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Entity Bean and DAO
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aakash bhatt
Ranch Hand
Joined: Jan 09, 2003
Posts: 182
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What is the difference between Entity Bean and DAO.
and when should we use DAO and Entity Bean
Regards,
aakash
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Rajeshwari Natarajan
Ranch Hand
Joined: Mar 05, 2003
Posts: 67
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A DAO is used to basically write all data access logic. U might be reading the data from a database, flat file or any other source. U'll start with a top level DAO class and a separate DAO for each underlying data storage. The client only needs to know the methods to be invoked to get data and not the underlyisng data storage logic.
U can use DAO in conjunction with an BMP entity beans. That way u won't have to make changes in ur bean everytime u want to make changes to ur database calls.
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regards<br />Rajeshwari. N
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Ajith Kallambella
Sheriff
Joined: Mar 17, 2000
Posts: 5782
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You may want to read the following articles -
http://java.sun.com/blueprints/patterns/DAO.html
http://java.sun.com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html
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Open Group Certified Distinguished IT Architect. Open Group Certified Master IT Architect. Sun Certified Architect (SCEA).
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subject: Entity Bean and DAO
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