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