ques from mock exam

[Giju George]

Which of the following methods must be implemented by an entity bean class with Container managed persistence?


Options

Select 1 correct option.

1. At least one ejbCreate(...)

2. ejbFindByPrimaryKey(...)


3. At least one ejbSelect(...)


4. At least one ejbFindByXXX(...) (other than ejbFindByPrimaryey(...))


5. None of these.

The correct answer mentioned in the mock exam was "5".

But isn't it option 2 (ejbFindByPrimaryKey(...) ) correct ???

[Giju George]

folks... got the answer.
In the spec it says,

An entity bean�s home interface defines one or more finder methods[16]

And ejbFindByPrimaryKey is NOT declared in the entity bean class. It's done by the container. I mistook home interface for entity bean class.

So, now I know that I should read the ques twice...

[Valentin Crettaz]

Actually, the ejbFindByPrimaryKey() method must be implemented by the container when it generates the concrete (container-specific) entity bean class. The bean provider must not declare such a method in his abstract entity bean class as mentioned in section 10.7.2 of the EJB 2.0 spec.

The entity bean class does not implement the finder methods. The implementations of the finder methods are provided by the container.