ejbaccountsbean.java~35~

一个J2EE四层架构的实例

package sqlaccounts;

import java.io.Serializable;
import java.util.Enumeration;
import java.util.Vector;

import javax.ejb.CreateException;
import javax.ejb.DuplicateKeyException;
import javax.ejb.EJBException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.FinderException;
import javax.ejb.NoSuchEntityException;
import javax.ejb.ObjectNotFoundException;
import javax.ejb.RemoveException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
abstract public class EjbAccountsBean implements EntityBean {
  EntityContext entityContext;
  public java.lang.String ejbCreate(java.lang.String id, String Type, double bal) throws CreateException {
    setId(id);
    setType(Type);
    setBal(bal);
    return null;
  }
  public java.lang.String ejbCreate(String Id) throws CreateException {
    /**@todo Complete this method*/
    setId(Id);
    return null;
  }
  public void ejbPostCreate(java.lang.String id, String Type, double bal) throws CreateException {
    /**@todo Complete this method*/
  }
  public void ejbPostCreate(String Id) throws CreateException {
    /**@todo Complete this method*/
  }
  public void ejbRemove() throws RemoveException {
    /**@todo Complete this method*/
  }
  public abstract void setId(java.lang.String id);
  public abstract void setBal(double bal);
  public abstract void setType(java.lang.String type);
  public abstract java.lang.String getId();
  public abstract double getBal();
  public abstract java.lang.String getType();
  public void ejbLoad() {
    /**@todo Complete this method*/
  }
  public void ejbStore() {
    /**@todo Complete this method*/
  }
  public void ejbActivate() {
    /**@todo Complete this method*/
  }
  public void ejbPassivate() {
    /**@todo Complete this method*/
  }
  public void unsetEntityContext() {
    this.entityContext = null;
  }
  public void setEntityContext(EntityContext entityContext) {
    this.entityContext = entityContext;
  }
  public double deposit(double bal) {
    /**@todo Complete this method*/
    setBal(getBal() + bal);
    return getBal();
  }
  public double withdraw(double account) {
    /**@todo Complete this method*/
    log("AccountBean.withdraw: Withdrawing $" + account + " from '" +
                               getId() + "'");
   if (account > getBal()) {
        log("Request to withdraw $" + account +
                               "; is more than balance $" + getBal() +
                               " in account " + getId());
   }
   else
      setBal(getBal() - account);
   return getBal();
  }
  private void log(String s) {
    System.out.println(s);
  }
}