We will query the Hessian service of the previous Creating a Hessian service recipe.

We need the UserService interface, so that our application knows the methods available on the Hessian service:

public interface UserService {
  public abstract List<User> findAll();
  public abstract void addUser(User user);
}

User objects will be exchanged over the network, so we need the User class of the previous recipe as well:

public class User implements Serializable {    
  private String name;
  private int age;
  
  public User(String name, int age) {
    this.name = name;
    this.age = age;
  }

  // ... getters and setters
}

Here are the steps for using a Hessian service: