Remote Interface

The remote interface extends javax.ejb.EJBObject and defines the business methods that a remote client may invoke. Here is the SavingsAccount remote interface:

import javax.ejb.EJBObject;
import java.rmi.RemoteException;
import java.math.BigDecimal;

public interface SavingsAccount extends EJBObject {
    
    public void debit(BigDecimal amount)
        throws InsufficientBalanceException, RemoteException;

    public void credit(BigDecimal amount)
        throws RemoteException;
 
    public String getFirstName()
        throws RemoteException;

    public String getLastName()
        throws RemoteException;
   
    public BigDecimal getBalance()
        throws RemoteException;
}
 

The requirements for the method definitions in a remote interface are the same for both session and entity beans:

• Each method in the remote interface must match a method in the enterprise bean class.
• The signatures of the methods in the remote interface must be identical to the signatures of the corresponding methods in the enterprise bean class.
• The arguments and return values must be valid RMI types.
• The throws clause must include java.rmi.RemoteException.

A local interface has the same requirements, with the following exceptions:

• The arguments and return values are not required to be valid RMI types.
• The throws clause does not include java.rmi.RemoteException.