added ex V

src/exercises/ex_v/Referee.java

@@ -0,0 +1,20 @@
+package exercises.ex_v;
+
+import java.util.Comparator;
+import java.util.List;
+
+public class Referee implements Runnable {
+    private final List<Result> results;
+
+    public Referee(List<Result> results) {
+        this.results = results;
+    }
+
+    @Override
+    public void run() {
+        System.out.println("Referee starts to establish ranking...");
+        results.sort(Result::compareTo);
+        System.out.println("PDG Team Ranking:");
+        results.forEach(System.out::println);
+    }
+}

src/exercises/ex_v/Result.java

@@ -0,0 +1,28 @@
+package exercises.ex_v;
+
+public class Result implements Comparable<Result>{
+    private final int time;
+    private final String team;
+    public Result(String team, int time) {
+        this.time = time;
+        this.team = team;
+    }
+
+    public int getTime() {
+        return time;
+    }
+
+    public String getTeam() {
+        return team;
+    }
+
+    @Override
+    public int compareTo(Result result) {
+        return this.getTime() - result.getTime();
+    }
+
+    @Override
+    public String toString() {
+        return getTeam() + " : " + getTime() + "h";
+    }
+}

src/exercises/ex_v/Team.java

@@ -0,0 +1,34 @@
+package exercises.ex_v;
+
+import exercises.Utils;
+
+import java.util.List;
+import java.util.concurrent.BrokenBarrierException;
+import java.util.concurrent.CyclicBarrier;
+
+public class Team implements Runnable {
+    private final String name;
+    private final List<Result> results;
+    private final CyclicBarrier barrier;
+
+    public Team(int i, List<Result> results, CyclicBarrier barrier) {
+        this.name = "Team " + i;
+        this.results = results;
+        this.barrier = barrier;
+    }
+
+    @Override
+    public void run() {
+        System.out.println(name + " : Started the race");
+        try {
+            Utils.randomSleep(1000, 5000);
+        } catch (InterruptedException _) {}
+
+        Result result = new Result(name, (int) (Math.random() * 20 + 1));
+        System.out.println(name + " : Finished the race in " + result.getTime() + " hours and is waiting for other teams");
+        results.add(result);
+        try {
+            barrier.await();
+        } catch (InterruptedException | BrokenBarrierException _) {}
+    }
+}

src/exercises/ex_v/TestingCyclicBarrier_PDG.java

@@ -0,0 +1,22 @@
+package exercises.ex_v;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.BrokenBarrierException;
+import java.util.concurrent.CyclicBarrier;
+
+public class TestingCyclicBarrier_PDG {
+    private static int NUM_TEAMS = 20;
+    public static void main(String[] args) {
+        List<Result> results = Collections.synchronizedList(new ArrayList<>());
+        System.out.println("Starting PDG with " + NUM_TEAMS + " teams ");
+        CyclicBarrier barrier = new CyclicBarrier(NUM_TEAMS, new Referee(results));
+
+        // Start the team threads and synchronize them.
+        // Make sure finally to order to order the results and print them
+        for (int i = 0; i < NUM_TEAMS; i++) {
+            new Thread(new Team(i, results, barrier)).start();
+        }
+    }
+}