customerdelegate.java

A J2EE & Jsp Example

/*
 * CustomerDelegate.java
 *
 * Created on April 11, 2003, 4:12 PM
 */



import javax.ejb.EJBObject;
import javax.rmi.PortableRemoteObject;
import java.rmi.RemoteException;
import customerejb.CustomerTO;
import customerejb.ICustomerTO;
import customerejb.CustomerException;
import customerejb.*;


/**
 *
 * @author  cm88860
 */
public class CustomerDelegate {
    // the current customer facade customerFacade bean remote interface
    private CustomerFacade customerFacade = null;
    String jndiCustomerName  = "java:comp/env/ejb/CustomerFacade";

    /**
     * Initializes the delegate and retrieves a new Remote Interface of the
     * CustomerFacade customerFacade bean.
     *
     * @throws CustomerException Thrown if an error occurs while retrieving
     *         CustomerFacade.
     */
    public CustomerDelegate() throws CustomerException {
        try {
            CustomerFacadeHome home = (CustomerFacadeHome)
                    ServiceLocator.getInstance().getRemoteHome(jndiCustomerName, CustomerFacadeHome.class);
            System.out.println( "CustomerDelegate: customerFacade = home.create");
            customerFacade = home.create();
        } catch (Exception e) {
            throw new CustomerException("Cannot locate CustomerFacadeHome", e);
        }
    }


    /**
      * Retrieves the customer data associated with the specified customer id.
      *
      * @param customerId The customer id for which customer data is to be
      *        retrieved.
      * @return A transfer object object containing the customer data associated
      *         with the specified customer id.
      * @throws CustomerException Thrown if an error occurs during data retrieval.
      * @throws AuthorizationException Thrown if the current user does not have
      *         the authorization to view customer data.
      */
    public CustomerTO getCustomer(String customerId) throws CustomerException {
        CustomerTO customer=null;
        try {
            customer=  (CustomerTO)customerFacade.getCustomer(customerId);
            return customer;
        } catch (Exception e) {
           throw new CustomerException(e);
        }
        
    }

    /**
     * Modifies the customer data specified by the specified TO object.
     * The TO object <b>MUST</b> contain a customer id value in order for
     * an update to be correctly processed.
     *
     * @param customer The TO containing the data which will be used to
     *        update a customer.
     * @throws CustomerException Thrown if an error occurs during data modification.
     * @throws AuthorizationException Thrown if the current user does not have
     *         the authorization to modify customers.
     */
    public void updateCustomer(CustomerTO customer) throws CustomerException {
        try {
            customerFacade.updateCustomer(customer);
        } catch (Exception e) {
           throw new CustomerException(e);
        }
    }

    /**
     * Creates a customer using the data provided by the specified
     * TO.
     *
     * @param customer The TO containing the data which is used to
     *        create a customer.
     * @return A transfer object containing the newly created customer.
     * @throws CustomerException Thrown if an error occurs during data creation.
     * @throws AuthorizationException Thrown if the current user does not have
     *         the authorization to create customers.
     */
    public CustomerTO createCustomer(CustomerTO customer) throws CustomerException{
        CustomerTO customerTO=null;
        try {
           customerTO= customerFacade.createCustomer(customer);
           return customerTO;
        } catch (RemoteException e) {
            throw new CustomerException(e);
        }

    }

    /**
     * Removes the customer data associated with the specified customer id.
     *
     * @param customerId The customer id of the customer data to be removed.
     * @throws CustomerException Thrown if an error occurs during data removal.
     * @throws AuthorizationException Thrown if the current user does not have
     *         the authorization to remove customers.
     */
    public void removeCustomer(String customerId)throws CustomerException{
        try {
            customerFacade.removeCustomer(customerId);
      } catch (RemoteException e) {
            throw new CustomerException(e);
        }
    }

 
}