Fix bugs that server doesn't send boat location before and after the race.

- server will sends boat location not only during the race, but also before the race and after all boats have finished the race.
- refactored simulator so that it runs at the begining to send boat location, and if its "isStarted" set to true, then it starts moving the boats.

#story[715]

src/main/java/seng302/server/simulator/Simulator.java

@@ -14,6 +14,7 @@ public class Simulator extends Observable implements Runnable {
 	private List<Corner> course;
 	private List<Boat> boats;
 	private long lapse;
+	private boolean isRaceStarted;
 
 	/**
 	 * Creates a simulator instance with given time lapse.
@@ -24,6 +25,7 @@ public class Simulator extends Observable implements Runnable {
 		course = rp.getCourse();
 		boats = rp.getBoats();
 		this.lapse = lapse;
+		isRaceStarted = false;
 
 		setLegs();
 
@@ -35,7 +37,7 @@ public class Simulator extends Observable implements Runnable {
 			boat.setLng(startLng);
 			boat.setLastPassedCorner(course.get(0));
 			boat.setHeadingCorner(course.get(1));
-			boat.setSpeed(ThreadLocalRandom.current().nextInt(40000, 60000 + 1));
+			boat.setSpeed(ThreadLocalRandom.current().nextInt(400000, 600000 + 1));
 		}
 	}
 
@@ -45,15 +47,18 @@ public class Simulator extends Observable implements Runnable {
 		int numOfFinishedBoats = 0;
 
 		while (numOfFinishedBoats < boats.size()) {
-			for (Boat boat : boats) {
-				numOfFinishedBoats += moveBoat(boat, lapse);
+
+			// if race has started, then boat should start to move.
+			if (isRaceStarted) {
+				for (Boat boat : boats) {
+					numOfFinishedBoats += moveBoat(boat, lapse);
+				}
 			}
 			//System.out.println(boats.get(0));
 
 			setChanged();
 			notifyObservers(boats);
 
-			// sleep for 1 second.
 			try {
 				Thread.sleep(lapse);
 			} catch (InterruptedException e) {
@@ -64,7 +69,6 @@ public class Simulator extends Observable implements Runnable {
 
 	/**
 	 * Moves a boat with given time duration.
-	 *
 	 * @param boat the boat to be moved
 	 * @param duration the moving duration in milliseconds
 	 * @return 1 if the boat has reached the final line, otherwise return 0
@@ -126,4 +130,7 @@ public class Simulator extends Observable implements Runnable {
 		return boats;
 	}
 
+	public void setRaceStarted(boolean raceStarted) {
+		isRaceStarted = raceStarted;
+	}
 }