accountejb.java

《J2EE企业级应用开发》一书的配套源代码

package com.j2eeapp.cdstore.customer;

import java.rmi.RemoteException;
import javax.ejb.*;
import javax.naming.InitialContext;
import com.j2eeapp.cdstore.util.JNDINames;

/**
 * account=
 * credit+contact
 */
public abstract class AccountEJB implements EntityBean
{
    /**
     * Attributes declaration
    */
    public EntityContext EJB_Context=null;
    
    /**
     * @J2EE_METHOD  --  AccountEJB
     */
    public AccountEJB    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbCreate
     * Matching method of the create() method of the bean's home interface. The container
     * invokes an ejbCreate method to create an entity object. It executes in the transaction
     * context determined by the transaction attribute of the matching create() method.
     * @throws javax.ejb.CreateException
     */
    public Object ejbCreate    (String userId,String status) throws CreateException 
    { 
		setUserId(userId);
		setStatus(status);
	      return null;
    }
    /**
     * @J2EE_METHOD  --  ejbPostCreate
     * Matching method of ejbCreate. The container invokes the matching ejbPostCreate method
     * on an instance after it invokes the ejbCreate method with the same arguments. It
     * executes in the same transaction context as that of the matching ejbCreate method.
     * @throws javax.ejb.CreateException
     */
    public void ejbPostCreate    (String userId,String status) throws CreateException 
    { 
       try {
            InitialContext ic = new InitialContext();
            ContactInfoLocalHome cih = (ContactInfoLocalHome) ic.lookup(JNDINames.CONTACT);
            ContactInfoLocal contactInfo = cih.create(userId);
            setContactInfo(contactInfo);
            CreditCardLocalHome cch = (CreditCardLocalHome) ic.lookup(JNDINames.CREDITCARD);
            CreditCardLocal creditCard = cch.create(String.valueOf(System.currentTimeMillis()));
            setCreditCard(creditCard);
        } catch (javax.naming.NamingException ne) {
            throw new CreateException("ContactInfoEJB error: naming exception looking up contact info or credit card");
        }
	}
    
     public Object ejbCreate(String userId,String status, ContactInfoLocal contactInfo, CreditCardLocal creditCard) throws CreateException {
        setUserId(userId);
        setStatus(status);
        return null;
    }

        
      public void ejbPostCreate(String userId,String status, ContactInfoLocal contactInfo, CreditCardLocal creditCard) throws CreateException {
        setContactInfo(contactInfo);
        setCreditCard(creditCard);
    }

    
    /**
     * @J2EE_METHOD  --  ejbActivate
     * A container invokes this method when the instance is taken out of the pool of available
     * instances to become associated with a specific EJB object. This method transitions
     * the instance to the ready state. This method executes in an unspecified transaction
     * context.
     */
    public void ejbActivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbPassivate
     * A container invokes this method on an instance before the instance becomes disassociated
     * with a specific EJB object. After this method completes, the container will place
     * the instance into the pool of available instances. This method executes in an unspecified
     * transaction context.
     */
    public void ejbPassivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbLoad
     * A container invokes this method to instruct the instance to synchronize its state
     * by loading it from the underlying database. This method always executes in the transaction
     * context determined by the value of the transaction attribute in the deployment descriptor.
     */
    public void ejbLoad    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbStore
     * A container invokes this method to instruct the instance to synchronize its state
     * by storing it to the underlying database. This method always executes in the transaction
     * context determined by the value of the transaction attribute in the deployment descriptor.
     */
    public void ejbStore    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbRemove
     * A container invokes this method before it removes the EJB object that is currently
     * associated with the instance. It is invoked when a client invokes a remove operation
     * on the enterprise Bean's home or remote interface. It transitions the instance from
     * the ready state to the pool of available instances. It is called in the transaction
     * context of the remove operation.
     * @throws javax.ejb.RemoveException
     */
    public void ejbRemove    () throws RemoveException 
    { 

    }
    
    /**
     * @J2EE_METHOD  --  setEntityContext
     * Set the associated entity context. The container invokes this method on an instance
     * after the instance has been created. This method is called in an unspecified transaction
     * context. 
     */
    public void setEntityContext    (EntityContext ctx)  
    { 
		EJB_Context=ctx;
    }
    
    /**
     * @J2EE_METHOD  --  unsetEntityContext
     * Unset the associated entity context. The container calls this method before removing
     * the instance. This is the last method that the container invokes on the instance.
     * The Java garbage collector will  invoke the finalize() method on the instance. It
     * is called in an unspecified transaction context.
     */
    public void unsetEntityContext    ()  
    { 
		EJB_Context=null;
    }
    
    /**
     * @J2EE_METHOD  --  getStatus
     */
   public abstract String getStatus();
    
    /**
     * @J2EE_METHOD  --  setStatus
     */
    public abstract void setStatus    (String newStatus); 
    
    //cmr method
    public abstract ContactInfoLocal getContactInfo();
    public abstract void setContactInfo(ContactInfoLocal contactInfo);
    
    public abstract CreditCardLocal getCreditCard();
    public abstract void setCreditCard(CreditCardLocal creditCard);
    
     public abstract String getUserId    (); 
    
    /**
     * @J2EE_METHOD  --  setBanneropt
     */
    public abstract void setUserId   (String userId); 
    

}