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example is not real until you can get it running, and you can look over the code. With

this in mind, I divided the tutorial examples into a incrementally increasing complex

example, each with automated build files. Thus when you first go over CMP, you do not

have to worry about EJB QL, etc. Since the tutorials get incrementally more complex, I

suggest that you do them in the right order.

The examples are as follows:

The first example introduces you to the concepts of CMP including defining CMP

fields in the deployment descriptor. This example also shows how to reference an

enterprise bean from another bean, and how to reference an enterprise bean from a

client. This example only has two beans: the

UserBean

and the

UserManagementBean

. The example is in this first tutorial, part one

The second example adds a

findAll()

method to the home interface using

EJB QL. This is just a slight change from the last example to demonstrate EJB QL. It

has the same number of beans. This example is also in the current tutorial, part one.

The third example covers adding the

UserInfoBean

and creating a one to one

bidirectional relationship between the

UserBean

and the

UserInfoBean

. This

example is in the second tutorial, part two.

In the fourth example, I cover adding the

RoleBean

, and creating a many to many,

unidirectional, relationship between

UserBean

s and

RoleBeans

. This example is in

the second tutorial, part two.

In the fifth example, I cover adding the

GroupBean

, and creating a one to many,

bidirectional relationship, between

GroupBean

and UserBeans. This example is in

the second tutorial, part two.

The last example extends the fifth and adds EJB QL to demonstrate naviagating

collections and sets of objects. This example is in the third tutorial, part three.

The entire tutorial is code centric and every part of the code is covered: client, entity

beans and session bean.

Introducing EJB CMP/CMR, Part 1 of 2

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