usermanagerbean.java

JAVA 光盘操作说明 是解压包,直接解压就可以了

package examples;

import javax.ejb.*;
import java.rmi.RemoteException;
import java.util.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;

/**
 * UserManager is Stateless session bean resposible for creating and retrieving a customer record.
 * It is also authenticate the user.
 */
public class UserManagerBean implements SessionBean {
    
    /*
	 * Although this is a stateless session bean, we
	 * do have state - the session context.  Remember
	 * that stateless session beans can store state, they
	 * just can't store state on behalf of particular
	 * clients.
	 */
	private SessionContext ctx;

       
    //----------------------------------------------------
	// Begin EJB-required methods.  The methods below are
	// called by the Container, and never called by client
	// code.
	//----------------------------------------------------
        
    /**
     * Returns an user object for the given customer id.
     * It uses customer entity bean to retrieve the user record.
     */
    public User getUser(String customerId) {
        try{
            Context ctx = new InitialContext();
            CustomerHome customerHome = (CustomerHome)
                PortableRemoteObject.narrow(
                    ctx.lookup("CustomerHome"), CustomerHome.class);
            Customer customer=customerHome.findByPrimaryKey(customerId);
            return new User(customer.getCustomerID(),customer.getName(),customer.getPassword(),customer.getAddress());
           }catch (Exception ex) {
               throw new EJBException(ex);
           }
    }
        
    /**
     * It uses the customer entity bean to create a record in the databse
     */
    public void createUser(User user){
        try{
            Context ctx = new InitialContext();
            CustomerHome customerHome = (CustomerHome)
                PortableRemoteObject.narrow(
                    ctx.lookup("CustomerHome"), CustomerHome.class);
            Customer customer=customerHome.create(user.getCustomerID(),user.getName(),user.getPassword(),user.getAddress());
           }catch (Exception e) {
               throw new EJBException(e);
           }
    }
    
    /**
     * This method Authenticate the user, if password is incorrect throws an InvalidPasswordException.
     * If password is correct, returns true.
     */
    public boolean validateUser(String login, String password)throws InvalidPasswordException {
        try{
            User user=getUser(login);
            if(password.equals(user.getPassword())){
                return true;
            }else {
                throw new InvalidPasswordException("Invalid Password:"+password);
            }
            }catch(Exception ex){
                throw new EJBException(ex);
            }
    }
                
    //----------------------------------------------------
	// Begin EJB-required methods.  The methods below are
	// called by the Container, and never called by client
	// code.
	//----------------------------------------------------	
    public void ejbCreate() throws RemoteException {
		System.out.println("ejbCreate() called.");
	}
  
	public void ejbRemove() {
		System.out.println("ejbRemove() called.");
	}

	public void ejbActivate() {
		System.out.println("ejbActivate() called.");
	}

	public void ejbPassivate() {
		System.out.println("ejbPassivate() called.");
	}

	public void setSessionContext(SessionContext ctx) {
		System.out.println("setSessionContext() called");
		this.ctx = ctx;
	}

	//----------------------------------------------------
	// End EJB-required methods
	//----------------------------------------------------
}