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(int numPMs, int numCloudPartners, File schedulerLog,
  31                         SchedulerType schedulerType, ScenarioType scenario)
  32                         throws IOException {
  33                 super(numPMs, numCloudPartners, schedulerLog, schedulerType, scenario);
  34
  35                 this.VMType = VMType.NonResizable;
  36         }
  37
  38         @Override
  39         protected void handleEvents(LinkedList<SchedulerEvent> events) {
  40
  41                 for(SchedulerEvent evt : events) {
  42                         if(evt.getType() == EventType.endApplication) {
  43                                 VirtualMachine vm = evt.getApp().getRunningOn();
  44                                 vm.stopApplication(evt.getApp());
  45                                 PhysicalMachine pm = vm.getRunningOn();
  46                                 try {
  47                                         pm.stopVirtualMachine(vm);
  48                                 } catch (ActiveApplicationsException e) {
  49                                         log.warn("VM "+vm.getId()+"could not be stopped, "+e.getMessage());
  50                                 }
  51                         }
  52                 }
  53
  54                 // sorting applications by amount of resources (descending)
  55                 List<SortedApplication> sortedApps = sortApps(events);
  56
  57                 for(Iterator<SortedApplication> iter = sortedApps.iterator(); iter.hasNext(); ) {
  58                         boolean appDeployed = false;
  59                         Application app = iter.next().getApp();
  60
  61                         if(manager.getPMs().size() == 0) {
  62                                 PhysicalMachine pm = manager.startPhysicalMachine();
  63                                 boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  64
  65                                 if(enoughResources) {
  66                                         pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  67                                         appDeployed = true;
  68                                         log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
  69                                 }
  70                                 else {
  71                                         log.warn("Application "+app.toString()+" cannot be run on empty pm "+pm.getId());
  72                                 }
  73                         }
  74                         else {
  75                                 // sorting physical machines by resource utilization (descending)
  76                                 List<SortedPhysicalMachine> sortedPMs = sortPMs();
  77
  78                                 for(Iterator<SortedPhysicalMachine> it = sortedPMs.iterator(); iter.hasNext(); ) {
  79                                         PhysicalMachine pm = it.next().getPm();
  80                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  81
  82                                         if(enoughResources) {
  83                                                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  84                                                 vm.startApplication(app);
  85                                                 appDeployed = true;
  86                                                 log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
  87                                                 break;
  88                                         }
  89                                 }
  90                                 if(!appDeployed  &&  (manager.getPMs().size() < manager.getMaxPMs())) {
  91
  92                                         PhysicalMachine pm = manager.startPhysicalMachine();
  93                                         boolean enoughResources = pm.checkVM(app.getSize(), app.getRam(), app.getCpu());
  94
  95                                         if(enoughResources) {
  96                                                 VirtualMachine vm = pm.startVirtualMachine(app.getSize(), app.getRam(), app.getCpu(), VMType);
  97                                                 vm.startApplication(app);
  98                                                 appDeployed = true;
  99                                                 log.debug("Application "+app.toString()+" started on new pm "+pm.getId());
 100                                         }
 101                                         else {
 102                                                 log.warn("Application "+app.toString()+" cannot be run on empty pm "+pm.getId());
 103                                         }
 104                                 }
 105                         }
 106                         if(!appDeployed)
 107                                 log.warn("Application "+app.toString()+" could not be deployed on any pm");
 108                 }
 109         }
 110
 111         // sorting applications by amount of resources (descending)
 112         private List<SortedApplication> sortApps(LinkedList<SchedulerEvent> events) {
 113                 List<SortedApplication> sortedApps = new LinkedList<SortedApplication>();
 114                 for(SchedulerEvent evt : events) {
 115                         if(evt.getType() == EventType.startApplication)
 116                                 sortedApps.add(new SortedApplication(evt.getApp()));
 117                 }
 118                 Collections.sort(sortedApps);
 119                 Collections.reverse(sortedApps);
 120                 return sortedApps;
 121         }
 122
 123         // sorting physical machines by resource utilization (descending)
 124         private List<SortedPhysicalMachine> sortPMs() {
 125                 List<SortedPhysicalMachine> sortedPMs = new LinkedList<SortedPhysicalMachine>();
 126                 for(PhysicalMachine pm  : manager.getPMs())
 127                         sortedPMs.add(new SortedPhysicalMachine(pm));
 128
 129                 Collections.sort(sortedPMs);
 130                 Collections.reverse(sortedPMs);
 131                 return sortedPMs;
 132         }
 133
 134 }