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 import at.ac.tuwien.lsdc.exception.VMResizeException;
   7
   8 public class VirtualMachine {
   9
  10         public enum VMType {
  11                 Resizable, NonResizable
  12         }
  13
  14         private static int count = 0;
  15         private int posOnPM;
  16
  17         private PhysicalMachine runningOn;
  18
  19         private HashMap<Integer, Application> applications = new HashMap<Integer, Application>();
  20
  21         private int id;
  22
  23         public static final int initialSize = 100;
  24         public static final int initialRAM = 50;
  25         public static final int initialCPU = 150;
  26
  27         private int reservedSize;
  28         private int reservedRAM;
  29         private int reservedCPU;
  30
  31         private VMType type;
  32
  33         public VirtualMachine(int size, int RAM, int CPU, PhysicalMachine pm, VMType type) {
  34                 id = count;
  35                 count++;
  36                 reservedSize = size + initialSize;
  37                 reservedRAM = RAM + initialRAM;
  38                 reservedCPU = CPU + initialCPU;
  39                 runningOn = pm;
  40                 posOnPM = pm.countCurrentlyRunningVMs();
  41                 this.type = type;
  42         }
  43
  44         public boolean startApplication(Application app) {
  45                 if (enoughResources(app)) {
  46                         applications.put(app.getID(), app);
  47                         app.setRunningOn(this);
  48                         return true;
  49                 } else
  50                         return false;
  51         }
  52
  53         /**
  54          * Set the VM size to the given new values.
  55          *
  56          * @param newSize
  57          *          the new size of the VM, excluding the initial consumption.
  58          * @param newRAM
  59          *          the new RAM of the VM, excluding the initial consumption.
  60          * @param newCPU
  61          *          the new CPU of the VM, excluding the initial consumption.
  62          * @return
  63          */
  64         public boolean resizeVM(int newSize, int newRAM, int newCPU) {
  65                 if (type == VMType.Resizable
  66                                 && runningOn.checkVM(newSize - reservedSize, newRAM - reservedRAM, newCPU - reservedCPU)) {
  67                         // Resize VM
  68                         reservedSize = initialSize + newSize;
  69                         reservedRAM = initialRAM + newRAM;
  70                         reservedCPU = initialCPU + newCPU;
  71                         return true;
  72                 } else
  73                         return false;
  74 //                      throw new VMResizeException("Could not resize VM!", this);
  75         }
  76
  77         public boolean resizeUp(Application app) throws VMResizeException {
  78
  79                 int newSize = reservedSize + (app.getSize() - availableSize()) - initialSize;
  80                 int newRAM = reservedRAM + (app.getRam() - availableRAM()) - initialRAM;
  81                 int newCPU = reservedCPU + (app.getCpu() - availableCPU()) - initialCPU;
  82
  83                 int diffSize = newSize + initialSize - reservedSize;
  84                 int diffRAM = newRAM + initialRAM - reservedRAM;
  85                 int diffCPU = newCPU + initialCPU - reservedCPU;
  86
  87                 if(!(type == VMType.Resizable) || !runningOn.checkVM(newSize, newRAM, newCPU)) {
  88                         throw new VMResizeException("Could not resize VM!", this);
  89                 }
  90
  91                 runningOn.resizeUp(diffSize, diffRAM, diffCPU);
  92
  93                 reservedSize = newSize + initialSize;
  94                 reservedRAM = newRAM + initialRAM;
  95                 reservedCPU = newCPU + initialCPU;
  96                 return true;
  97         }
  98
  99         public boolean resizeDown(Application app) {
 100                 reservedSize = reservedSize - app.getSize();
 101                 reservedRAM = reservedRAM - app.getRam();
 102                 reservedCPU = reservedCPU - app.getCpu();
 103                 return true;
 104         }
 105
 106         public boolean stopApplication(Application app) {
 107                 if (applications.containsKey(app.getID())) {
 108                         applications.remove(app.getID());
 109                         return true;
 110                 } else
 111                         return false;
 112         }
 113
 114         public boolean enoughResources(Application app) {
 115                 return (app.getSize() <= availableSize()) && (app.getRam() <= availableRAM()) && (app.getCpu() <= availableCPU());
 116         }
 117
 118         public int availableSize() {
 119                 return reservedSize - getSize();
 120         }
 121
 122         public int availableRAM() {
 123                 return reservedRAM - getRAM();
 124         }
 125
 126         public int availableCPU() {
 127                 return reservedCPU - getCPU();
 128         }
 129
 130         public int getId() {
 131                 return id;
 132         }
 133
 134         public PhysicalMachine getRunningOn() {
 135                 return runningOn;
 136         }
 137
 138         public int getPositionOnPM() {
 139                 return posOnPM;
 140         }
 141
 142         public ArrayList<Application> getApplications() {
 143                 return new ArrayList<Application>(applications.values());
 144         }
 145
 146         public int getSize() {
 147                 int usedSize = initialSize;
 148                 for (Application a : applications.values())
 149                         usedSize += a.getSize();
 150                 return usedSize;
 151         }
 152
 153         public int getRAM() {
 154                 int usedRAM = initialRAM;
 155                 for (Application a : applications.values())
 156                         usedRAM += a.getRam();
 157                 return usedRAM;
 158         }
 159
 160         public int getCPU() {
 161                 int usedCPU = initialCPU;
 162                 for (Application a : applications.values())
 163                         usedCPU += a.getCpu();
 164                 return usedCPU;
 165         }
 166
 167         public int getReservedSize() {
 168                 return reservedSize;
 169         }
 170
 171         public int getReservedRAM() {
 172                 return reservedRAM;
 173         }
 174
 175         public int getReservedCPU() {
 176                 return reservedCPU;
 177         }
 178
 179         public int getDiffSize() {
 180
 181         }
 182
 183         @Override
 184         public String toString() {
 185                 return "VirtualMachine [posOnPM=" + posOnPM + ", runningOn=" + runningOn + ", id=" + id + ", reservedSize="
 186                                 + reservedSize + ", reservedRAM=" + reservedRAM + ", reservedCPU=" + reservedCPU + ", type=" + type + "]";
 187         }
 188
 189 }