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Building the JSF Managed Beans

Creating managed beans has never bean easier: you don't need any more declaring them in faces-config.xml. It's enough to declare them as annotation with the @ManagedBean annotation.

The first bean we will write is the @RequestScoped StoreManager JSF Bean which acts as a facade between the JSF page and the EJBs.

package control;

import java.util.*;

import javax.faces.application.FacesMessage;
import javax.faces.bean.*;
import javax.faces.context.FacesContext;
import javax.faces.model.SelectItem;
import javax.inject.Inject;


import view.CustomerView;
import view.ItemView;

import ejb.StoreManagerDao;

import model.Customer;
import model.Item;

@ManagedBean()
@RequestScoped
public class StoreManager  {

 @Inject  
 private StoreManagerDao storeManager;

 @ManagedProperty(value="#{customerView}") 
 private CustomerView customerView;

 @ManagedProperty(value="#{itemView}") 
 private ItemView itemView;

 List<Item> listOrders;
 List <SelectItem> listCustomers;

 public StoreManager() {     }


// Getters and setters here ...


 public void findOrders() {  

   listOrders = storeManager.findAllItems(customerView.getCustomerId());

 }
 public void findAllCustomers() {  

   List<Customer> listCustomersEJB = storeManager.findAllCustomers();

   for (int ii=0;ii<listCustomersEJB.size();ii++) {
     Customer customer = listCustomersEJB.get(ii);
     listCustomers.add(new  SelectItem(customer.getId(),customer.getName()));

   }
 }

 public void saveOrder() { 
   storeManager.saveItem

         (customerView.getCustomerId(),itemView.getOrderPrice(),itemView.getOrderQuantity(),itemView.getOrderProduct());

   FacesMessage fm = new FacesMessage("Saved order for "+itemView.getOrderQuantity()+ " of "+itemView.getOrderProduct());
   FacesContext.getCurrentInstance().addMessage("Message", fm);

 }

 public void insertCustomer() {
  
   storeManager.createCustomer(customerView.getCustomerCountry(), customerView.getCustomerName());

   FacesMessage fm = new

      FacesMessage("Created Customer  "+customerView.getCustomerName()+ " from   "+customerView.getCustomerCountry());
   FacesContext.getCurrentInstance().addMessage("Message", fm);

   // Forces customer reloading
   this.listCustomers=null;
 }

 
 public List<SelectItem> getListCustomers() {
   if (listCustomers == null) {
     listCustomers= new ArrayList();
     findAllCustomers();
   }
   return listCustomers;
 }

 public void setListCustomers(List<SelectItem> listCustomers) {
   this.listCustomers = listCustomers;
 }
}

Things to notice:

1) The StoreManagerDao EJB is injected into the JSF Managed Bean using the annotation

@Inject  
private StoreManagerDao storeManager;

2) The other Managed Beans used in this project (to handle the form attributes) are injected using the @ManagedProperty annotation:

@ManagedProperty(value="#{customerView}") 
private CustomerView customerView;

@ManagedProperty(value="#{itemView}") 
private ItemView itemView;