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

   1 package at.ac.tuwien.lsdc.sched;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.util.LinkedList;
   6 import java.util.SortedMap;
   7 import java.util.TreeMap;
   8
   9 import org.slf4j.Logger;
  10 import org.slf4j.LoggerFactory;
  11
  12 import at.ac.tuwien.lsdc.management.MachineManager;
  13 import at.ac.tuwien.lsdc.types.Application;
  14 import at.ac.tuwien.lsdc.types.ScenarioData;
  15 import at.ac.tuwien.lsdc.types.ScenarioType;
  16 import at.ac.tuwien.lsdc.types.SchedulerData;
  17 import at.ac.tuwien.lsdc.types.SchedulerEvent;
  18 import at.ac.tuwien.lsdc.types.SchedulerEvent.EventType;
  19 import at.ac.tuwien.lsdc.types.SchedulerType;
  20 import at.ac.tuwien.lsdc.types.VirtualMachine.VMType;
  21 import at.ac.tuwien.lsdc.util.CSVLogger;
  22
  23 public abstract class AbstractScheduler {
  24
  25         private static final Logger log = LoggerFactory
  26                         .getLogger(AbstractScheduler.class);
  27
  28         // the following types are only needed for correct
  29         // log output
  30         protected SchedulerType schedulerType;
  31         protected ScenarioType scenario;
  32         protected int numTotalInSourced;
  33         protected int numTotalOutSourced;
  34         protected int numCurrInSourced;
  35         protected int numCurrOutSourced;
  36         protected double totalConsumption;
  37
  38         protected MachineManager manager;
  39         protected File schedulerLog;
  40         protected CSVLogger logger;
  41         protected VMType VMType;
  42
  43
  44         // this map saves the following Type of Events:
  45         // start of an Application, end of an Application
  46         // (start outSourced, end outSourced, start inSourced, end inSourced)
  47
  48 //      protected HashMap<Long, LinkedList<SchedulerEvent>> eventMap;
  49
  50         protected SortedMap<Long, LinkedList<SchedulerEvent>> eventMap;
  51
  52         // Scheduler has an internal Time "Abstraction"
  53         // at every point in time it checks for Events in his "EventList"
  54         // and handles them (via the individual scheduling algorithm)
  55         protected long currTime;
  56
  57         // the timestamp at which the Scheduler is finished
  58         // it is updated with every added "EndEvent"
  59         protected long endTime;
  60
  61
  62         public AbstractScheduler(int numPMs, int numCloudPartners,
  63                         File schedulerLog, SchedulerType schedulerType,
  64                         ScenarioType scenario) throws IOException {
  65                 this.manager = new MachineManager(numPMs);
  66                 this.schedulerLog = schedulerLog;
  67                 this.schedulerType = schedulerType;
  68                 this.scenario = scenario;
  69                 this.eventMap = new TreeMap<Long, LinkedList<SchedulerEvent>>();
  70                 this.logger = new CSVLogger(schedulerLog);
  71                 initCloudPartners(numCloudPartners);
  72
  73         //      Using federation ?
  74         //      federation = new Federation(numCloudPartners);
  75         }
  76
  77         private void initCloudPartners(int numCloudPartners) {
  78                 for (int i = 0; i < numCloudPartners; i++) {
  79                         // initialize a cloudpartner
  80                         // add to a member: List<CloudPartner>
  81                         // CloudPartner should have 2 functions:
  82                         // insource & outsource
  83                         // insource randomly gives an application to us
  84                         // outsource accepts randomly applications from us
  85                 }
  86         }
  87
  88         // Initialize Scheduler with Data from CSV
  89         // CSV will be parsed and sent as List<Application> to Scheduler
  90         public ScenarioData initAndStart(LinkedList<Application> apps) {
  91                 for (Application app : apps) {
  92                         insertStartEvent(app.getTimestamp(), app);
  93                         insertStopEvent(app.getTimestamp() + app.getDuration(), app);
  94                 }
  95                 startScheduling();
  96                 try {
  97                         logger.close();
  98                 } catch (IOException e) {
  99                         log.error("couldn't close logger");
 100                 }
 101                 return doEndLogging();
 102         }
 103
 104         /**
 105          * Insert a start event into the map, at timestamp when the application should start
 106          * @param timestamp the timestamp when the application should start
 107          * @param app the application to start
 108          */
 109         private void insertStartEvent(long timestamp, Application app) {
 110                 SchedulerEvent evt = new SchedulerEvent(timestamp, EventType.startApplication, app);
 111                 if(!eventMap.containsKey(timestamp)) {
 112                         LinkedList<SchedulerEvent> list = new LinkedList<SchedulerEvent>();
 113                         list.add(evt);
 114                         eventMap.put(timestamp, list);
 115                 } else {
 116                         LinkedList<SchedulerEvent> list = eventMap.get(timestamp);
 117                         list.add(evt);
 118                 }
 119         }
 120
 121         /**
 122          * Insert a stop event into the map, at timestamp when the application should stop
 123          * @param timestamp the timestamp when the application should stop
 124          * @param app the application to stop
 125          */
 126         private void insertStopEvent(long timestamp, Application app) {
 127                 SchedulerEvent evt = new SchedulerEvent(timestamp, EventType.endApplication, app);
 128                 if(!eventMap.containsKey(timestamp)) {
 129                         LinkedList<SchedulerEvent> list = new LinkedList<SchedulerEvent>();
 130                         list.add(evt);
 131                         eventMap.put(timestamp, list);
 132                 } else {
 133                         LinkedList<SchedulerEvent> list = eventMap.get(timestamp);
 134                         list.add(evt);
 135                 }
 136                 if(endTime < timestamp) {
 137                         endTime = timestamp;
 138                 }
 139         }
 140
 141         protected void startScheduling() {
 142                 while (true) {
 143                         LinkedList<SchedulerEvent> events = eventMap.get(currTime);
 144                         handleEvents(events);
 145                         doStateLogging();
 146                         //advance Time to next Event
 147                         currTime++;
 148
 149                         if (currTime == endTime) {
 150                                 // reached last Event, Scheduler will shut down
 151                                 break;
 152                         }
 153                 }
 154         }
 155
 156         // this method is where the Scheduling Algorithm resides
 157         // it reads the Events (start & stop of applications)
 158         protected abstract void handleEvents(LinkedList<SchedulerEvent> events);
 159
 160         protected void doStateLogging() {
 161                 SchedulerData data = new SchedulerData(currTime, 1, 1, 1,
 162                                 manager.countCurrentlyRunningPMs(),
 163                                 manager.countCurrentlyRunningVMs(),
 164                                 manager.getCurrentConsumption(), numCurrInSourced,
 165                                 numCurrOutSourced);
 166                 totalConsumption += manager.getCurrentConsumption();
 167                 try {
 168                         logger.logSchedulerData(data);
 169                 } catch (IOException e) {
 170                         log.error("error logging data");
 171                 }
 172         }
 173
 174         // this creates the total summary which should be written to a CSV at the
 175         // end
 176         protected ScenarioData doEndLogging() {
 177                 return new ScenarioData(schedulerType.toString(), scenario.toString(),
 178                                 1, 1, 1, 1, numTotalInSourced, numTotalOutSourced);
 179         }
 180 }