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XDoclet and EJB: ejb.bean

The

ejb.bean

allows you to specify the type of the bean. The first bean I will cover

will be an CMP 2.0 entity bean. You will need to specify that it is a CMP bean, that is

uses

cmp version

2.x, give it a schema name, and specify its primary key (if it is not

using a complex primary key), and the primary key type. Here is the Xdoclet tags for

ejbs as demonstrated with the Dept bean:

/**...

* @ejb.bean

*

type="CMP"

*

cmp version="2.x"

*

name="DeptBean"

*

schema="Dept"

*

local jndi name="DeptBean"

*

view type="local"

*

primkey field="id"

*

*

* @ejb.pk

class="java.lang.Integer"

*

*/

public abstract class DeptBean implements EntityBean {

Notice that the primary key class is specified with the tags class attribute. The names

are very close to what you would expect them to be. It is fairly intuitive as the

corresponding meta data matches that which you would find for the

ejb jar.xml

file.

What may not be obvious is the

view type

parameter. The

view type

parameter

specifies if this is going to be a local bean, a remote bean or both. The above XDoclet

tags would generate the following elements in the EJB deployment descriptor

(

ejb jar.xml

):

This entity bean represents a Department of Employees.

DeptBean

...

ejb.DeptBean

Container

java.lang.Integer

False

2.x

Dept

Enhance J2EE component reuse with XDoclets

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