Added some stuff.

src/main/java/sesim/Scheduler.java

@@ -26,14 +26,11 @@
 package sesim;
 
 import java.util.Comparator;
-import java.util.HashMap;
 import java.util.Iterator;
-import java.util.Map;
 import java.util.SortedMap;
 import java.util.SortedSet;
 import java.util.TreeMap;
 import java.util.TreeSet;
-import java.util.concurrent.ConcurrentSkipListSet;
 
 /**
  *
@@ -42,96 +39,10 @@ import java.util.concurrent.ConcurrentSkipListSet;
 public class Scheduler extends Thread {
 
     long multiply = 1;
-    final SortedMap<Long, SortedSet<TimerEvent>> event_queue = new TreeMap<>();
 
+    private final SortedMap<Long, SortedSet<TimerEvent>> event_queue = new TreeMap<>();
     private boolean stop = false;
 
-    public class Runner extends Thread {
-
-        Runner() {
-
-        }
-
-        @Override
-        public void run() {
-            while (!stop) {
-                synchronized (event_queue) {
-                    try {
-                        event_queue.wait(5000);
-                    } catch (Exception e) {
-
-                    }
-                    System.out.printf("500 mllies waited\n");
-                }
-
-            }
-
-        }
-
-    }
-
-    private class Event implements Comparable {
-
-        long time;
-
-        @Override
-        public int compareTo(Object o) {
-            if (((Event) o).time < time) {
-                return -1;
-            }
-            if (((Event) o).time > time) {
-                return 1;
-            }
-            return 0;
-
-        }
-
-    }
-
-    //  Runner queues[];
-    Runner runners[];
-
-    /**
-     *
-     * @param num_runners
-     */
-    public Scheduler(int num_runners) {
-        //  event_queue = new ConcurrentSkipListSet(new TreeSet<>());
-        runners = new Runner[num_runners];
-
-        for (int i = 0; i < num_runners; i++) {
-            Runner r = new Runner();
-            System.out.print("Making runner: " + r + "\n");
-
-            runners[i] = new Runner();
-        }
-
-    }
-
-    /**
-     *
-     */
-    @Override
-    public void start() {
-
-       /* for (Runner runner : runners) {
-            runner.start();
-        }
-        */
-        super.start();
-    }
-
-    /*
-    public boolean isAlive() {
-
-        for (Runner runner : runners) {
-            if (runner.isAlive()) {
-                return true;
-            }
-        }
-        return false;
-    }
-     */
     public void halt() {
         stop = true;
         synchronized (event_queue) {
@@ -142,21 +53,19 @@ public class Scheduler extends Thread {
     public interface TimerEvent {
 
         long timerEvent();
-
     }
 
-    class ObjectComparator implements Comparator<Object> {
+    private class ObjectComparator implements Comparator<Object> {
 
         @Override
         public int compare(Object o1, Object o2) {
-            return System.identityHashCode(o1) - System.identityHashCode(o1);
+            return System.identityHashCode(o1) - System.identityHashCode(o2);
         }
-
     }
 
     public long getCurrentTimeMillies() {
         return System.currentTimeMillis();
-        
+
     }
 
     public void startEvent(TimerEvent e, long time) {
@@ -169,7 +78,7 @@ public class Scheduler extends Thread {
             }
             s.add(e);
         }
-        synchronized(this){
+        synchronized (this) {
             notify();
         }
     }
@@ -179,13 +88,16 @@ public class Scheduler extends Thread {
     }
 
     private void addEvent(TimerEvent e, long time) {
+
         long evtime = time + this.getCurrentTimeMillies();
+
         SortedSet<TimerEvent> s = event_queue.get(evtime);
         if (s == null) {
             s = new TreeSet<>(new ObjectComparator());
             event_queue.put(evtime, s);
         }
         s.add(e);
+
     }
 
     public long runEvents() {
@@ -194,25 +106,35 @@ public class Scheduler extends Thread {
                 return -1;
             }
 
+
             long t = event_queue.firstKey();
-            if (t >= this.getCurrentTimeMillies()) {
+            if (t <= this.getCurrentTimeMillies()) {
                 SortedSet s = event_queue.get(t);
+
                 event_queue.remove(t);
                 Iterator<TimerEvent> it = s.iterator();
                 while (it.hasNext()) {
-                    long next_t = this.fireEvent(it.next());
 
+                    TimerEvent e = it.next();
+                    long next_t = this.fireEvent(e);
+                    this.addEvent(e, next_t);
                 }
+                return 0;
 
+            } else {
+                return t - this.getCurrentTimeMillies();
             }
         }
-        return 1;
+
     }
 
     @Override
     public void run() {
         while (!stop) {
             long wtime = runEvents();
+            if (wtime == 0) {
+                continue;
+            }
 
             synchronized (this) {
                 try {
@@ -225,7 +147,7 @@ public class Scheduler extends Thread {
                 }
             }
         }
-        System.out.print("Running the scheduler\n");
+
     }
 
 }

src/test/java/sesim/Test.java

@@ -65,28 +65,51 @@ public class Test {
     /**
      * @param args the command line arguments
      */
-    public static void main(String[] args) {
+    public static void main(String[] args) throws InterruptedException {
         
-        Scheduler s = new Scheduler(10);
+        Scheduler s = new Scheduler();
         s.start();
       
         class Ev implements Scheduler.TimerEvent{
 
            @Override
            public long timerEvent() {
-               System.out.print("Timer Event Occured");
-               return 3000;
+               System.out.printf("Timer Event Occured %s\n",name);
+               if ("Ev1".equals(this.name))
+                    return 2000;
+               else
+                   return 4000;
+           }
+           
+           String name;
+           Ev(String name){
+               this.name=name;
            }
             
         }
         
-        Ev e1 = new Ev();
-        Ev e2 = new Ev();
+        Ev e1 = new Ev("Ev1");
+        Ev e2 = new Ev("Eb2");
         
         
         s.startEvent(e1, 0);
+            s.startEvent(e2, 0);
         
-        while(true){}
+    try
+    {
+        Thread.sleep(90000);
+    }
+    catch(Exception e) {
+        
+    }
+    
+    s.halt();
+        while (s.isAlive()){
+           
+        }
+        
+        System.out.print("All isstopped\n");            
+
        // s.startEvent(e2, 100);