src/at/ac/tuwien/lsdc/management/MachineManager.java

   1 package at.ac.tuwien.lsdc.management;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.Collections;
   6 import java.util.HashMap;
   7 import java.util.List;
   8
   9 import at.ac.tuwien.lsdc.exception.OutOfPMsException;
  10 import at.ac.tuwien.lsdc.exception.VMsRunningException;
  11 import at.ac.tuwien.lsdc.types.PhysicalMachine;
  12 import at.ac.tuwien.lsdc.util.NumberUtils;
  13
  14 /**
  15  * This class is responsible to start and stop PMs & VMs also it will be used to
  16  * put an application on a VM move an application and get utilization data
  17  *
  18  */
  19 public class MachineManager {
  20
  21         private HashMap<Integer, PhysicalMachine> PMs = new HashMap<Integer, PhysicalMachine>();
  22
  23         private int numPMs;
  24
  25         private int totalPMs = 0;
  26         private int totalVMs = 0;
  27         private int totalResizeCalls = 0;
  28
  29         public MachineManager(int numPMs) {
  30                 this.numPMs = numPMs;
  31         }
  32
  33         /**
  34          * Start a physical machine
  35          *
  36          * @return the PM that was started, null if all machines already running
  37          */
  38         public PhysicalMachine startPhysicalMachine() {
  39                 if (PMs.size() >= numPMs)
  40                         throw new OutOfPMsException("We cannot start another PM. All out PMs are already running!: " + numPMs);
  41
  42                 PhysicalMachine pm = new PhysicalMachine();
  43                 PMs.put(pm.getId(), pm);
  44                 pm.start();
  45                 totalPMs++;
  46                 return pm;
  47         }
  48
  49         /**
  50          * Stops a physical machine with the given id
  51          *
  52          * @param id
  53          *          the id of the PM to stop
  54          * @throws VMsRunningException
  55          *           is thrown when there are still VMs running on this PM
  56          */
  57         public void stopPhysicalMachine(int id) throws VMsRunningException {
  58                 if (PMs.containsKey(id)) {
  59                         PhysicalMachine pm = PMs.get(id);
  60                         totalVMs += pm.getTotalVMs();
  61                         pm.stop();
  62                         totalResizeCalls += pm.getTotalResizeCalls();
  63                         PMs.remove(id);
  64                 }
  65         }
  66
  67         /**
  68          * Returns all running physical machines
  69          *
  70          * @return the currently active PMs
  71          */
  72         public Collection<PhysicalMachine> getPMs() {
  73                 return PMs.values();
  74         }
  75
  76         /**
  77          * Returns the maximum number of available physical machines
  78          *
  79          * @return the maximum number of PMs
  80          */
  81         public int getMaxPMs() {
  82                 return numPMs;
  83         }
  84
  85         /**
  86          * Get the total size on all PMs
  87          *
  88          * @return the total size on all PMs
  89          */
  90         public int getTotalSize() {
  91                 int totalSize = 0;
  92                 for (PhysicalMachine pm : PMs.values()) {
  93                         if (pm.isRunning())
  94                                 totalSize += pm.getCurrentSize();
  95                 }
  96                 return totalSize;
  97         }
  98
  99         /**
 100          * Get the total Ram usage of all PMs
 101          *
 102          * @return the total usage of Ram
 103          */
 104         public int getTotalRam() {
 105                 int totalRam = 0;
 106                 for (PhysicalMachine pm : PMs.values()) {
 107                         if (pm.isRunning())
 108                                 totalRam += pm.getCurrentRam();
 109                 }
 110                 return totalRam;
 111         }
 112
 113         /**
 114          * Get the total Cpu usage of all PMs
 115          *
 116          * @return the total usage of Cpu power
 117          */
 118         public int getTotalCpu() {
 119                 int totalCpu = 0;
 120                 for (PhysicalMachine pm : PMs.values()) {
 121                         if (pm.isRunning())
 122                                 totalCpu += pm.getCurrentCPU();
 123                 }
 124                 return totalCpu;
 125         }
 126
 127         /**
 128          * Gets the current power consumption summed up from each PM
 129          *
 130          * @return the current power consumption
 131          */
 132         public double getCurrentConsumption() {
 133                 double consumption = 0;
 134                 for (PhysicalMachine pm : PMs.values()) {
 135                         if (pm.isRunning())
 136                                 consumption += pm.getConsumption();
 137                 }
 138                 consumption = NumberUtils.roundDouble(consumption);
 139                 return consumption;
 140         }
 141
 142         /**
 143          * Gets the number of currently running PMs
 144          *
 145          * @return the number of currently running PMs
 146          */
 147         public int countCurrentlyRunningPMs() {
 148                 int running = 0;
 149                 for (PhysicalMachine pm : PMs.values()) {
 150                         if (pm.isRunning())
 151                                 running++;
 152                 }
 153                 return running;
 154         }
 155
 156         /**
 157          * Gets the number of currently running VMs
 158          *
 159          * @return the number of currently running VMs
 160          */
 161         public int countCurrentlyRunningVMs() {
 162                 int running = 0;
 163                 for (PhysicalMachine pm : PMs.values()) {
 164                         if (pm.isRunning()) {
 165                                 running += pm.countCurrentlyRunningVMs();
 166                         }
 167                 }
 168                 return running;
 169         }
 170
 171         /**
 172          * sorting physical machines by resource utilization
 173          *
 174          * @return List of PMs sorted by resource utilization
 175          */
 176         public List<PhysicalMachine> getSortedPMs() {
 177                 List<PhysicalMachine> sortedPMs = new ArrayList<PhysicalMachine>(PMs.values());
 178                 Collections.sort(sortedPMs);
 179                 return sortedPMs;
 180         }
 181
 182         public int getTotalPMs() {
 183                 return totalPMs;
 184         }
 185
 186         public int getTotalVMs() {
 187                 return totalVMs;
 188         }
 189
 190         public int getTotalResizeCalls() {
 191                 return totalResizeCalls;
 192         }
 193
 194 }