CalculatorEJB.java

public interface CalculatorCommonBusiness {
  int add(int... arguments);
}

public interface CalculatorLocal extends CalculatorCommonBusiness, javax.ejb.EJBLocalObject {
  
}

public interface CalculatorRemote extends CalculatorCommonBusiness, javax.ejb.EJBObject {
  
}

public interface CalculatorLocalHome extends javax.ejb.EJBLocalHome {
  CalculatorLocal create() throws javax.ejb.CreateException;
}

public interface CalculatorRemoteHome extends javax.ejb.EJBHome {
  CalculatorRemote create() throws javax.rmi.RemoteException, javax.ejb.CreateException;
}

public interface CalculatorLocalBusiness extends CalculatorCommonBusiness {
  
}

public interface CalculatorRemoteBusiness extends CalculatorCommonBusiness {
  
}

public class CalculatorBeanBase implements CalculatorCommonBusiness {
  @Override
  public int add(int... arguments) {
    int result = 0;
    for(int i: arguments) {
      result += i;
    }
    return result;
  }
}

@javax.ejb.Stateless
@javax.ejb.Local(CalculatorLocalBusiness.class)
@javax.ejb.Remote(CalculatorRemoteBusiness.class)
@javax.ejb.LocalHome(CalculatorLocalHome.class)
@javax.ejb.RemoteHome(CalculatorRemoteHome.class)
@javax.ejb.LocalBean
public class ManyViewCalculatorBean extends CalculatorBaseBean implements CalculatorCommonBusiness {
  
}