src/at/ac/tuwien/lsdc/types/VirtualMachine.java

   1 package at.ac.tuwien.lsdc.types;
   2
   3 import java.util.ArrayList;
   4 import java.util.HashMap;
   5
   6 public class VirtualMachine {
   7
   8         public enum VMType {
   9                 Resizable, NonResizable
  10         }
  11
  12
  13         private static int count = 0;
  14
  15         private PhysicalMachine runningOn;
  16
  17         private HashMap<Integer, Application> applications = new HashMap<Integer, Application>();
  18
  19         private int id;
  20
  21         public static final int initialSize = 100;
  22         public static final int initialRAM = 50;
  23         public static final int initialCPU = 150;
  24
  25         private int size;
  26         private int RAM;
  27         private int CPU;
  28
  29         private VMType type;
  30
  31         public VirtualMachine(int size, int RAM, int CPU, PhysicalMachine pm, VMType type) {
  32                 this.id = count;
  33                 count++;
  34                 this.size = size + initialSize;
  35                 this.RAM = RAM + initialRAM;
  36                 this.CPU = CPU + initialCPU;
  37                 this.runningOn = pm;
  38                 this.type = type;
  39         }
  40
  41         public boolean startApplication(Application app) {
  42                 if (enoughResources(app)) {
  43                         applications.put(app.getID(), app);
  44                         return true;
  45                 } else if (type == VMType.Resizable  &&  runningOn.checkVM(app.getSize(), app.getRam(), app.getCpu())) {
  46                         applications.put(app.getID(), app);
  47                         size = size + app.getSize();
  48                         RAM = RAM + app.getRam();
  49                         CPU = CPU + app.getCpu();
  50                         return true;
  51                 } else
  52                         return false;
  53         }
  54
  55         public boolean stopApplication(Application app) {
  56                 if (applications.containsKey(app.getID())) {
  57                         size = size - app.getSize();
  58                         RAM = RAM - app.getRam();
  59                         CPU = CPU - app.getCpu();
  60                         applications.remove(app.getID());
  61                         return true;
  62                 } else
  63                         return false;
  64         }
  65
  66         private boolean enoughResources(Application app) {
  67                 return (app.getSize() <= availableSize())
  68                                 && (app.getRam() <= availableRAM())
  69                                 && (app.getCpu() <= availableCPU());
  70         }
  71
  72         private int availableSize() {
  73                 return size - initialSize;
  74         }
  75
  76         private int availableRAM() {
  77                 return RAM - initialRAM;
  78         }
  79
  80         private int availableCPU() {
  81                 return CPU - initialCPU;
  82         }
  83
  84         public int getId() {
  85                 return id;
  86         }
  87
  88         public PhysicalMachine getRunningOn() {
  89                 return runningOn;
  90         }
  91
  92         public ArrayList<Application> getApplications() {
  93                 return new ArrayList<Application>(applications.values());
  94         }
  95
  96         public int getSize() {
  97                 return size;
  98         }
  99
 100         public int getRAM() {
 101                 return RAM;
 102         }
 103
 104         public int getCPU() {
 105                 return CPU;
 106         }
 107
 108 }