sjfpremp

package Schedulling.sjf;

import Schedulling.CpuScheduler;
import Schedulling.Process;
import java.util.ArrayList;

/**
 *
 * @author Mirra Ariesta Amalia Adiba
 */
public class SJFPreemptive extends CpuScheduler {

    public Process getSmallestBurstTime(ArrayList<Process> processList) {
        Process result = null;

        for (int i = 0; i < processList.size(); i++) {
            if (result == null) {
                result = processList.get(i);
            } else {
                if (result.getBurstTime() > processList.get(i).getBurstTime()) {
                    result = processList.get(i);
                }
            }
        }

        return result;
    }

    @Override
    protected void execute() {
        time = 0;
        ArrayList<Schedulling.Process> queue;
        while (getRemainingBurstTime() > 0) {

            if (getCurrent() != null && (getCurrent().getCurrentBurstTime() <= 0 || getCurrent() != getSmallestBurstTime(getProcessQueue(null)))) {
                detach();
            }

            if (getCurrent() == null) {
                attach(getSmallestBurstTime(getProcessQueue(null)));
            }

            if (getCurrent() != null) {
                getCurrent().doProcess();
            }

            queue = getProcessQueue(getCurrent());
            queueWait(queue);
            time++;
        }
        detach();

    }

}