added ex V
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20
src/exercises/ex_v/Referee.java
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20
src/exercises/ex_v/Referee.java
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package exercises.ex_v;
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import java.util.Comparator;
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import java.util.List;
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public class Referee implements Runnable {
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private final List<Result> results;
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public Referee(List<Result> results) {
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this.results = results;
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}
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@Override
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public void run() {
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System.out.println("Referee starts to establish ranking...");
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results.sort(Result::compareTo);
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System.out.println("PDG Team Ranking:");
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results.forEach(System.out::println);
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}
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}
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28
src/exercises/ex_v/Result.java
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src/exercises/ex_v/Result.java
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package exercises.ex_v;
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public class Result implements Comparable<Result>{
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private final int time;
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private final String team;
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public Result(String team, int time) {
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this.time = time;
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this.team = team;
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}
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public int getTime() {
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return time;
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}
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public String getTeam() {
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return team;
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}
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@Override
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public int compareTo(Result result) {
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return this.getTime() - result.getTime();
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}
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@Override
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public String toString() {
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return getTeam() + " : " + getTime() + "h";
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}
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}
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34
src/exercises/ex_v/Team.java
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34
src/exercises/ex_v/Team.java
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package exercises.ex_v;
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import exercises.Utils;
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import java.util.List;
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import java.util.concurrent.BrokenBarrierException;
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import java.util.concurrent.CyclicBarrier;
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public class Team implements Runnable {
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private final String name;
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private final List<Result> results;
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private final CyclicBarrier barrier;
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public Team(int i, List<Result> results, CyclicBarrier barrier) {
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this.name = "Team " + i;
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this.results = results;
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this.barrier = barrier;
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}
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@Override
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public void run() {
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System.out.println(name + " : Started the race");
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try {
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Utils.randomSleep(1000, 5000);
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} catch (InterruptedException _) {}
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Result result = new Result(name, (int) (Math.random() * 20 + 1));
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System.out.println(name + " : Finished the race in " + result.getTime() + " hours and is waiting for other teams");
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results.add(result);
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try {
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barrier.await();
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} catch (InterruptedException | BrokenBarrierException _) {}
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}
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}
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22
src/exercises/ex_v/TestingCyclicBarrier_PDG.java
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22
src/exercises/ex_v/TestingCyclicBarrier_PDG.java
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package exercises.ex_v;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.concurrent.BrokenBarrierException;
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import java.util.concurrent.CyclicBarrier;
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public class TestingCyclicBarrier_PDG {
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private static int NUM_TEAMS = 20;
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public static void main(String[] args) {
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List<Result> results = Collections.synchronizedList(new ArrayList<>());
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System.out.println("Starting PDG with " + NUM_TEAMS + " teams ");
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CyclicBarrier barrier = new CyclicBarrier(NUM_TEAMS, new Referee(results));
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// Start the team threads and synchronize them.
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// Make sure finally to order to order the results and print them
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for (int i = 0; i < NUM_TEAMS; i++) {
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new Thread(new Team(i, results, barrier)).start();
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}
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}
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}
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