src/at/ac/tuwien/lsdc/sched/SchedulerA.java

   1 package at.ac.tuwien.lsdc.sched;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.util.Iterator;
   6 import java.util.LinkedList;
   7 import java.util.List;
   8
   9 import org.slf4j.Logger;
  10 import org.slf4j.LoggerFactory;
  11
  12 import edu.emory.mathcs.backport.java.util.Collections;
  13
  14 import at.ac.tuwien.lsdc.exception.ActiveApplicationsException;
  15 import at.ac.tuwien.lsdc.types.Application;
  16 import at.ac.tuwien.lsdc.types.PhysicalMachine;
  17 import at.ac.tuwien.lsdc.types.ScenarioType;
  18 import at.ac.tuwien.lsdc.types.SchedulerEvent;
  19 import at.ac.tuwien.lsdc.types.SchedulerEvent.EventType;
  20 import at.ac.tuwien.lsdc.types.SchedulerType;
  21 import at.ac.tuwien.lsdc.types.SortedApplication;
  22 import at.ac.tuwien.lsdc.types.SortedPhysicalMachine;
  23 import at.ac.tuwien.lsdc.types.VirtualMachine;
  24
  25
  26 public class SchedulerA extends AbstractScheduler {
  27
  28         private static final Logger log = LoggerFactory.getLogger(SchedulerA.class);
  29
  30         public SchedulerA(File logFile, SchedulerType schedulerType, ScenarioType scenario, int numPMs, int numCloudPartners) throws IOException {
  31                 super(logFile, schedulerType, scenario, numPMs, numCloudPartners);
  32                 this.VMType = VMType.NonResizable;
  33         }
  34
  35         @Override
  36         protected void handleEvents(LinkedList<SchedulerEvent> events) {
  37
  38                 for(SchedulerEvent evt : events) {
  39                         if(evt.getType() == EventType.endApplication) {
  40                                 VirtualMachine vm = evt.getApp().getRunningOn();
  41                                 vm.stopApplication(evt.getApp());
  42                                 PhysicalMachine pm = vm.getRunningOn();
  43                                 try {
  44                                         pm.stopVirtualMachine(vm);
  45                                 } catch (ActiveApplicationsException e) {
  46                                         log.warn("VM "+vm.getId()+"could not be stopped, "+e.getMessage());
  47                                 }
  48                         }
  49                 }
  50
  51                 // sorting applications by amount of resources (descending)
  52                 List<SortedApplication> sortedApps = sortApps(events);
  53
  54                 for(Iterator<SortedApplication> iter = sortedApps.iterator(); iter.hasNext(); ) {
  55                         boolean appDeployed = false;
  56                         Application app = iter.next().getApp();
  57
  58                         if(machineManager.getPMs().size() == 0) {
  59                                 PhysicalMachine pm = machineManager.startPhysicalMachine();
  60                                 boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  61
  62                                 if(enoughResources) {
  63                                         pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  64                                         appDeployed = true;
  65                                         log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
  66                                 }
  67                                 else {
  68                                         log.warn("Application "+app.toString()+" cannot be run on empty pm "+pm.getId());
  69                                 }
  70                         }
  71                         else {
  72                                 // sorting physical machines by resource utilization (descending)
  73                                 List<SortedPhysicalMachine> sortedPMs = sortPMs();
  74
  75                                 for(Iterator<SortedPhysicalMachine> it = sortedPMs.iterator(); iter.hasNext(); ) {
  76                                         PhysicalMachine pm = it.next().getPm();
  77                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  78
  79                                         if(enoughResources) {
  80                                                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  81                                                 vm.startApplication(app);
  82                                                 appDeployed = true;
  83                                                 log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
  84                                                 break;
  85                                         }
  86                                 }
  87                                 if(!appDeployed  &&  (machineManager.getPMs().size() < machineManager.getMaxPMs())) {
  88
  89                                         PhysicalMachine pm = machineManager.startPhysicalMachine();
  90                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  91
  92                                         if(enoughResources) {
  93                                                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  94                                                 vm.startApplication(app);
  95                                                 appDeployed = true;
  96                                                 log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
  97                                         }
  98                                         else {
  99                                                 log.warn("Application "+app.toString()+" cannot be run on empty pm "+pm.getId());
 100                                         }
 101                                 }
 102                         }
 103                         if(!appDeployed)
 104                                 log.warn("Application "+app.toString()+" could not be deployed on any pm");
 105                 }
 106         }
 107
 108         // sorting applications by amount of resources (descending)
 109         private List<SortedApplication> sortApps(LinkedList<SchedulerEvent> events) {
 110                 List<SortedApplication> sortedApps = new LinkedList<SortedApplication>();
 111                 for(SchedulerEvent evt : events) {
 112                         if(evt.getType() == EventType.startApplication)
 113                                 sortedApps.add(new SortedApplication(evt.getApp()));
 114                 }
 115                 Collections.sort(sortedApps);
 116                 Collections.reverse(sortedApps);
 117                 return sortedApps;
 118         }
 119
 120         // sorting physical machines by resource utilization (descending)
 121         private List<SortedPhysicalMachine> sortPMs() {
 122                 List<SortedPhysicalMachine> sortedPMs = new LinkedList<SortedPhysicalMachine>();
 123                 for(PhysicalMachine pm  : machineManager.getPMs())
 124                         sortedPMs.add(new SortedPhysicalMachine(pm));
 125
 126                 Collections.sort(sortedPMs);
 127                 Collections.reverse(sortedPMs);
 128                 return sortedPMs;
 129         }
 130
 131 }