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 size;
  27         private int RAM;
  28         private int CPU;
  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.size = size + initialSize;
  36                 this.RAM = RAM + initialRAM;
  37                 this.CPU = 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 if (type == VMType.Resizable  &&  runningOn.checkVM(app.getSize(), app.getRam(), app.getCpu())) {
  49                         applications.put(app.getID(), app);
  50                         size = size + app.getSize();
  51                         RAM = RAM + app.getRam();
  52                         CPU = CPU + app.getCpu();
  53                         app.setRunningOn(this);
  54                         return true;
  55                 } else
  56                         return false;
  57         }
  58
  59         public boolean stopApplication(Application app) {
  60                 if (applications.containsKey(app.getID())) {
  61                         size = size - app.getSize();
  62                         RAM = RAM - app.getRam();
  63                         CPU = CPU - app.getCpu();
  64                         applications.remove(app.getID());
  65                         app.setRunningOn(null);
  66                         return true;
  67                 } else
  68                         return false;
  69         }
  70
  71         private boolean enoughResources(Application app) {
  72                 return (app.getSize() <= availableSize())
  73                                 && (app.getRam() <= availableRAM())
  74                                 && (app.getCpu() <= availableCPU());
  75         }
  76
  77         private int availableSize() {
  78                 return size - initialSize;
  79         }
  80
  81         private int availableRAM() {
  82                 return RAM - initialRAM;
  83         }
  84
  85         private int availableCPU() {
  86                 return CPU - initialCPU;
  87         }
  88
  89         public int getId() {
  90                 return id;
  91         }
  92
  93         public PhysicalMachine getRunningOn() {
  94                 return runningOn;
  95         }
  96
  97         public int getPositionOnPM() {
  98                 return posOnPM;
  99         }
 100
 101         public ArrayList<Application> getApplications() {
 102                 return new ArrayList<Application>(applications.values());
 103         }
 104
 105         public int getSize() {
 106                 int usedSize = initialSize;
 107                 for (Application a : applications.values())
 108                         usedSize += a.getSize();
 109                 return usedSize;
 110         }
 111
 112         public int getRAM() {
 113                 int usedRAM = initialRAM;
 114                 for (Application a : applications.values())
 115                         usedRAM += a.getRam();
 116                 return usedRAM;
 117         }
 118
 119         public int getCPU() {
 120                 int usedCPU = initialCPU;
 121                 for (Application a : applications.values())
 122                         usedCPU += a.getCpu();
 123                 return usedCPU;
 124         }
 125
 126 }