src/java/org/mxchange/pizzaapplication/beans/business/employee/PizzaCompanyEmployeeWebRequestBean.java

   1 /*
   2  * Copyright (C) 2017 RRoland Häder
   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.business.employee;
  18
  19 import fish.payara.cdi.jsr107.impl.NamedCache;
  20 import java.util.Iterator;
  21 import java.util.LinkedList;
  22 import java.util.List;
  23 import javax.annotation.PostConstruct;
  24 import javax.cache.Cache;
  25 import javax.ejb.EJB;
  26 import javax.enterprise.context.RequestScoped;
  27 import javax.inject.Inject;
  28 import javax.inject.Named;
  29 import org.mxchange.jcontactsbusiness.model.employee.CompanyEmployeeSessionBeanRemote;
  30 import org.mxchange.jcontactsbusiness.model.employee.Employee;
  31 import org.mxchange.pizzaapplication.beans.BasePizzaController;
  32
  33 /**
  34  * A request-scoped bean for general purposes for company employees.
  35  * <p>
  36  * @author Roland Häder<roland@mxchange.org>
  37  */
  38 @Named ("companyEmployeeController")
  39 @RequestScoped
  40 public class PizzaCompanyEmployeeWebRequestBean extends BasePizzaController implements PizzaCompanyEmployeeWebRequestController {
  41
  42         /**
  43          * Serial number
  44          */
  45         private static final long serialVersionUID = 12_886_968_547_361L;
  46
  47         /**
  48          * EJB for general company employee purposes
  49          */
  50         @EJB (lookup = "java:global/pizzaservice-ejb/companyEmployee!org.mxchange.jcontactsbusiness.model.employee.CompanyEmployeeSessionBeanRemote")
  51         private CompanyEmployeeSessionBeanRemote companyEmployeeBean;
  52
  53         /**
  54          * List of all company employees
  55          */
  56         @Inject
  57         @NamedCache (cacheName = "companyEmployeeCache")
  58         private Cache<Long, Employee> companyEmployeeCache;
  59
  60         /**
  61          * Default constructor
  62          */
  63         public PizzaCompanyEmployeeWebRequestBean () {
  64                 // Call super constructor
  65                 super();
  66         }
  67
  68         /**
  69          * Returns a list of all company employees
  70          * <p>
  71          * @return List of all company employees
  72          */
  73         @SuppressWarnings ("ReturnOfCollectionOrArrayField")
  74         public List<Employee> allCompanyEmployees () {
  75                 // Init list
  76                 List<Employee> list = new LinkedList<>();
  77
  78                 // Get iterator
  79                 Iterator<Cache.Entry<Long, Employee>> iterator = this.companyEmployeeCache.iterator();
  80
  81                 // Loop over all
  82                 while (iterator.hasNext()) {
  83                         // Get next entry
  84                         final Cache.Entry<Long, Employee> next = iterator.next();
  85
  86                         // Add value to list
  87                         list.add(next.getValue());
  88                 }
  89
  90                 // Return it
  91                 return list;
  92         }
  93
  94         /**
  95          * Initialization method
  96          */
  97         @PostConstruct
  98         public void init () {
  99                 // Is cache there?
 100                 if (!this.companyEmployeeCache.iterator().hasNext()) {
 101                         // Get whole list
 102                         List<Employee> list = this.companyEmployeeBean.allCompanyEmployees();
 103
 104                         // Add all
 105                         for (final Iterator<Employee> iterator = list.iterator(); iterator.hasNext();) {
 106                                 // Get next element
 107                                 final Employee next = iterator.next();
 108
 109                                 // Add it to cache
 110                                 this.companyEmployeeCache.put(next.getEmployeeId(), next);
 111                         }
 112                 }
 113         }
 114
 115 }