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         private int posOnPM;
  15
  16         private PhysicalMachine runningOn;
  17
  18         private HashMap<Integer, Application> applications = new HashMap<Integer, Application>();
  19
  20         private int id;
  21
  22         public static final int initialSize = 100;
  23         public static final int initialRAM = 50;
  24         public static final int initialCPU = 150;
  25
  26         private int reservedSize;
  27         private int reservedRAM;
  28         private int reservedCPU;
  29
  30         private VMType type;
  31
  32         public VirtualMachine(int size, int RAM, int CPU, PhysicalMachine pm, VMType type) {
  33                 this.id = count;
  34                 count++;
  35                 this.reservedSize = size + initialSize;
  36                 this.reservedRAM = RAM + initialRAM;
  37                 this.reservedCPU = CPU + initialCPU;
  38                 this.runningOn = pm;
  39                 this.posOnPM = pm.countCurrentlyRunningVMs();
  40                 this.type = type;
  41         }
  42
  43         public boolean startApplication(Application app) {
  44                 if (enoughResources(app)) {
  45                         applications.put(app.getID(), app);
  46                         app.setRunningOn(this);
  47                         return true;
  48                 } else
  49                         return false;
  50         }
  51
  52         public boolean resizeVM(int newSize, int newRAM, int newCPU) {
  53                 if (type == VMType.Resizable  &&  runningOn.checkVM(newSize-reservedSize, newRAM-reservedRAM, newCPU-reservedCPU )) {
  54                         //Resize VM
  55                         reservedSize = reservedSize + newSize;
  56                         reservedRAM = reservedRAM + newRAM;
  57                         reservedCPU = reservedCPU + newCPU;
  58                         return true;
  59                 } else
  60                         return false;
  61         }
  62
  63         public boolean stopApplication(Application app) {
  64                 if (applications.containsKey(app.getID())) {
  65                         applications.remove(app.getID());
  66                         app.setRunningOn(null);
  67                         return true;
  68                 } else
  69                         return false;
  70         }
  71
  72         private boolean enoughResources(Application app) {
  73                 return (app.getSize() <= availableSize())
  74                                 && (app.getRam() <= availableRAM())
  75                                 && (app.getCpu() <= availableCPU());
  76         }
  77
  78         private int availableSize() {
  79                 return reservedSize - getSize();
  80         }
  81
  82         private int availableRAM() {
  83                 return reservedRAM - getRAM();
  84         }
  85
  86         private int availableCPU() {
  87                 return reservedCPU - getCPU();
  88         }
  89
  90         public int getId() {
  91                 return id;
  92         }
  93
  94         public PhysicalMachine getRunningOn() {
  95                 return runningOn;
  96         }
  97
  98         public int getPositionOnPM() {
  99                 return posOnPM;
 100         }
 101
 102         public ArrayList<Application> getApplications() {
 103                 return new ArrayList<Application>(applications.values());
 104         }
 105
 106         public int getSize() {
 107                 int usedSize = initialSize;
 108                 for (Application a : applications.values())
 109                         usedSize += a.getSize();
 110                 return usedSize;
 111         }
 112
 113         public int getRAM() {
 114                 int usedRAM = initialRAM;
 115                 for (Application a : applications.values())
 116                         usedRAM += a.getRam();
 117                 return usedRAM;
 118         }
 119
 120         public int getCPU() {
 121                 int usedCPU = initialCPU;
 122                 for (Application a : applications.values())
 123                         usedCPU += a.getCpu();
 124                 return usedCPU;
 125         }
 126
 127         public int getReservedSize() {
 128                 return reservedSize;
 129         }
 130
 131         public int getReservedRAM() {
 132                 return reservedRAM;
 133         }
 134
 135         public int getReservedCPU() {
 136                 return reservedCPU;
 137         }
 138
 139 }