resource.java

java code for seifer secds

/*
 * (C) Copyright 2005 Davide Brugali, Marco Torchiano
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307  USA
 */


package scheduler;

import java.util.*;

public class Resource {
  class CompareActivity implements Comparator {
    public int compare(Object o1, Object o2) {
      Activity t1 = (Activity) o1;
      Activity t2 = (Activity) o2;
      if(t1.getActivation() > t2.getActivation())
    return 1;
      if(t1.getActivation() < t2.getActivation())
    return -1;
      return t1.getName().compareTo(t2.getName());
    }
  }

  private String name;
  private ArrayList activities = new ArrayList();
  private double gain = 0.0;

  public Resource(String name) {
    this.name = name;
  }

  public String getName() { return name; }

  public void addActivity(Activity activity) {
    activities.add(activity);
  }

  public void addTask(Task task) {
    Iterator iterator = task.getActivities();
    Activity activity;
    while(iterator.hasNext())
      activities.add( (Activity) iterator.next() );
  }

  public void setGain(double gain) {
    this.gain = gain;
  }

  public void reset() {
    Iterator iterator = activities.iterator();
    Activity activity;
    while(iterator.hasNext()) {
      activity = (Activity) iterator.next();
      activity.reset();
    }
  }

  public void schedule() {
    // updates the activationTime of each activity
    for(int i=0; i < activities.size(); i++)
      ((Activity) activities.get(i)).update(gain);

    // sorts the list of activities for activationTime
    Collections.sort(activities, new CompareActivity());

    // evaluates the new completionTime of each activity
    Activity previous = (Activity) activities.get(0);
    for(int i=1; i < activities.size(); i++) {
      Activity activity = (Activity) activities.get(i);
      activity.serialize(previous);
      previous = activity;
    }
  }

  public double getPerformance() {
    double performance = 0.0;
    for(int i=0; i < activities.size(); i++) {
      Activity activity = (Activity) activities.get(i);
      performance += activity.getPerformance();
    }
    return performance;
  }

  public void store() {
    for(int i=0; i < activities.size(); i++) {
      Activity activity = (Activity) activities.get(i);
      activity.store();
    }
  }

  public void restore() {
    for(int i=0; i < activities.size(); i++) {
      Activity activity = (Activity) activities.get(i);
      activity.restore();
    }
  }

  public String toString() {
    String result = "\nResource " + name;
    for(int i=0; i < activities.size(); i++)
      result = result.concat("\n   "+((Activity) activities.get(i)).toString());
    return result;
  }

// P2 - begin
  public Iterator getActivities() {
    return activities.iterator();
  }
// P2 - end
}