Developing the Business Logic

Creating and Implementing the Address class

1. In the Project Explorer, expand your EJB DC

2. In the context menu of ejbModule , choose New → Class.

3. Enter com.sap.tc.cm.ejb.example in the Package field. Enter Address in the Name field. Choose Finish . You have created the Address class.

4. To implement the class, open the Java editor and add the following source code:

   package com.sap.tc.cm.ejb.example;

   public class Address {

   private String town;

   private String street;

   public String getStreet() {

   return street;

   }

   public void setStreet(String street) {

   this.street = street;

   }

   public String getTown() {

   return town;

   }

   public void setTown(String town) {

   this.town = town;

   }

   }

Creating and Implementing the Student class

1. In an analogous manner, create a Student class.

2. To implement it, use the following source code:

   package com.sap.tc.cm.ejb.example;

   public class Student {

   private String name;

   private Address address;

   private int age;

   public Address getAddress() {

   return address;

   }

   public void setAddress(Address address) {

   this.address = address;

   }

   public int getAge() {

   return age;

   }

   public void setAge(int age) {

   this.age = age;

   }

   public String getName() {

   return name;

   }

   public void setName(String name) {

   this.name = name;

   }

   }

Creating and Implementing the Session Bean

1. In the Project Explorer , expand your EJB DC.

2. In the context menu of ejbModule , choose New → Other . Expand EJB and choose EJB Session Bean 3.0 . Choose Next .

3. Enter StudsBean in the EJB Name field and com.sap.tc.cm.ejb.example in the Default EJBPackage field . Set the Local option and choose Next .

4. The next screen confirms that the Business Interface StudsLocal is automatically created. Choose Finish

5. To implement the StudsBean session bean, use the following source code:

   package com.sap.tc.cm.ejb.example;

   import javax.ejb.Stateless;

   @Stateless(name="StudsBean")

   public class StudsBean implements StudsLocal {

   public Student getStudent(String name) {

   // creating new Student

   Student student = new Student();

   student.setName(name);

   student.setAge(25);

   // creating new Address and setting it to the Student

   Address a = new Address();

   a.setTown("MyTown");

   a.setStreet("MyStreet");

   student.setAddress(a);

   return student;

   }

   }

6. Switch to StudsLocal.java and insert the following source code:

   package com.sap.tc.cm.ejb.example;

   import javax.ejb.Local;

   @Local

   public interface StudsLocal {

   public Student getStudent(String name);

   }