src/java/org/mxchange/pizzaapplication/beans/product/PizzaProductWebApplicationBean.java

   1 /*
   2  * Copyright (C) 2016 Roland Haeder
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Affero General Public License as
   6  * published by the Free Software Foundation, either version 3 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU Affero General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Affero General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.mxchange.pizzaapplication.beans.product;
  18
  19 import java.text.MessageFormat;
  20 import java.util.Collections;
  21 import java.util.List;
  22 import javax.annotation.PostConstruct;
  23 import javax.enterprise.context.ApplicationScoped;
  24 import javax.enterprise.event.Observes;
  25 import javax.faces.FacesException;
  26 import javax.inject.Named;
  27 import javax.naming.Context;
  28 import javax.naming.InitialContext;
  29 import javax.naming.NamingException;
  30 import org.mxchange.jshopcore.events.product.AddedProductEvent;
  31 import org.mxchange.jshopcore.model.product.Product;
  32 import org.mxchange.jshopcore.model.product.ProductSessionBeanRemote;
  33 import org.mxchange.pizzaapplication.beans.BasePizzaController;
  34
  35 /**
  36  * General product controller
  37  * <p>
  38  * @author Roland Haeder<roland@mxchange.org>
  39  */
  40 @Named ("productController")
  41 @ApplicationScoped
  42 public class PizzaProductWebApplicationBean extends BasePizzaController implements PizzaProductWebApplicationController {
  43
  44         /**
  45          * Serial number
  46          */
  47         private static final long serialVersionUID = 58_137_539_530_279L;
  48
  49         /**
  50          * "Cache" for all available products
  51          */
  52         private List<Product> availableProducts;
  53
  54         @Override
  55         public void afterShopProductAdded (@Observes final AddedProductEvent event) {
  56                 // Is all valid?
  57                 if (null == event) {
  58                         // Throw NPE
  59                         throw new NullPointerException("event is null"); //NOI18N
  60                 } else if (event.getAddedProduct()== null) {
  61                         // Throw again ...
  62                         throw new NullPointerException("event.addedProduct is null"); //NOI18N
  63                 } else if (event.getAddedProduct().getProductId() == null) {
  64                         // And again ...
  65                         throw new NullPointerException("event.addedProduct.productId is null"); //NOI18N
  66                 } else if (event.getAddedProduct().getProductId() < 1) {
  67                         // Id is invalid
  68                         throw new IllegalArgumentException(MessageFormat.format("event.addedProduct.productId={0} is not valid.", event.getAddedProduct().getProductId())); //NOI18N
  69                 }
  70
  71                 // Is the product available?
  72                 if (event.getAddedProduct().getProductAvailability()) {
  73                         // Add it
  74                         this.availableProducts.add(event.getAddedProduct());
  75                 }
  76         }
  77
  78         @Override
  79         public List<Product> getAvailableProducts () throws FacesException {
  80                 // Return it
  81                 return Collections.unmodifiableList(this.availableProducts);
  82         }
  83
  84         /**
  85          * Initialization of this bean
  86          */
  87         @PostConstruct
  88         public void init () {
  89                 try {
  90                         // Get initial context
  91                         Context context = new InitialContext();
  92
  93                         // Try to lookup the bean
  94                         ProductSessionBeanRemote productBean = (ProductSessionBeanRemote) context.lookup("java:global/jshop-ejb/product!org.mxchange.jshopcore.model.product.ProductSessionBeanRemote"); //NOI18N
  95
  96                         // Get available products list
  97                         this.availableProducts = productBean.getAvailableProducts();
  98                 } catch (final NamingException e) {
  99                         // Continued to throw
 100                         throw new FacesException(e);
 101                 }
 102         }
 103
 104 }