Initialize STOMP heartbeats in JavaFX client

client/src/main/config/application.yaml

@@ -7,3 +7,8 @@ web.socket.url: ws://localhost:8080/sockjs
 # Production
 #web.base.url: http://lingo.charego.com
 #web.socket.url: ws://lingo.charego.com/sockjs
+
+# Logging
+logging:
+  level:
+    lingo: DEBUG

client/src/main/java/lingo/client/bootstrap/LingoClient.java

@@ -60,7 +60,7 @@ public class LingoClient extends Application {
 
 	@Bean
 	public ExecutorService executorService() {
-		return Executors.newFixedThreadPool(5, new CustomizableThreadFactory("ClientThread-"));
+		return Executors.newSingleThreadExecutor(new CustomizableThreadFactory("ClientThread-"));
 	}
 
 }

client/src/main/java/lingo/client/bootstrap/LingoPresenter.java

@@ -65,6 +65,7 @@ public class LingoPresenter implements FxmlController {
 
 			MultiplayerPresenter presenter = multiplayerContext.getBean(MultiplayerPresenter.class);
 			presenter.setOnBackButtonPressed(e -> {
+				log.info("Closing multiplayer...");
 				multiplayerContext.close();
 				content.setCenter(gameModeChooser);
 			});
@@ -90,6 +91,7 @@ public class LingoPresenter implements FxmlController {
 			Set<String> guesses = WordReader.readFileToSet("/guesses.txt");
 			List<String> words = WordReader.readFileToList("/words.txt");
 			SinglePlayerPresenter presenter = new SinglePlayerPresenter(words, guesses, e -> {
+				log.info("Closing single player...");
 				content.setCenter(gameModeChooser);
 			});
 			content.setCenter(presenter.getNode());

client/src/main/java/lingo/client/multiplayer/MultiplayerConfig.java

@@ -7,16 +7,20 @@ import org.springframework.boot.web.client.RootUriTemplateHandler;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
+import org.springframework.core.task.TaskExecutor;
 import org.springframework.messaging.converter.ByteArrayMessageConverter;
 import org.springframework.messaging.converter.CompositeMessageConverter;
 import org.springframework.messaging.converter.MappingJackson2MessageConverter;
 import org.springframework.messaging.converter.MessageConverter;
 import org.springframework.messaging.converter.StringMessageConverter;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
 import org.springframework.web.client.RestTemplate;
 import org.springframework.web.socket.client.WebSocketClient;
 import org.springframework.web.socket.client.standard.StandardWebSocketClient;
 import org.springframework.web.socket.messaging.WebSocketStompClient;
+import org.springframework.web.socket.sockjs.client.RestTemplateXhrTransport;
 import org.springframework.web.socket.sockjs.client.SockJsClient;
 import org.springframework.web.socket.sockjs.client.Transport;
 import org.springframework.web.socket.sockjs.client.WebSocketTransport;
@@ -24,20 +28,30 @@ import org.springframework.web.socket.sockjs.client.WebSocketTransport;
 @Configuration
 public class MultiplayerConfig {
 
+	@Bean
+	public TaskExecutor taskExecutor() {
+		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+		executor.setCorePoolSize(4);
+		executor.setMaxPoolSize(4);
+		executor.setThreadNamePrefix("TaskThread-");
+		executor.initialize();
+		return executor;
+	}
+
 	@Bean
 	public WebSocketClient webSocketClient() {
-		WebSocketClient webSocketClient = new StandardWebSocketClient();
 		List<Transport> transports = new ArrayList<>();
-		transports.add(new WebSocketTransport(webSocketClient));
+		transports.add(new WebSocketTransport(new StandardWebSocketClient()));
-		SockJsClient sockJsClient = new SockJsClient(transports);
+		transports.add(new RestTemplateXhrTransport());
-		return sockJsClient;
+		return new SockJsClient(transports);
 	}
 
 	@Bean
 	public WebSocketStompClient stompClient(WebSocketClient webSocketClient, MessageConverter messageConverter) {
 		WebSocketStompClient stompClient = new WebSocketStompClient(webSocketClient);
 		stompClient.setMessageConverter(messageConverter);
-		stompClient.setTaskScheduler(new ThreadPoolTaskScheduler());
+		stompClient.setTaskScheduler(heartbeatScheduler());
+		stompClient.setDefaultHeartbeat(heartbeatValue());
 		return stompClient;
 	}
 
@@ -57,4 +71,17 @@ public class MultiplayerConfig {
 		return restTemplate;
 	}
 
+	private TaskScheduler heartbeatScheduler() {
+		// Single thread unless/until more threads are needed
+		final ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
+		taskScheduler.setPoolSize(1);
+		taskScheduler.setThreadNamePrefix("Keep-Alive-");
+		taskScheduler.initialize();
+		return taskScheduler;
+	}
+
+	private long[] heartbeatValue() {
+		return new long[] { 25000, 25000 };
+	}
+
 }

client/src/main/java/lingo/client/multiplayer/MultiplayerPresenter.java

@@ -5,7 +5,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.UUID;
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutorService;
+import java.util.function.Consumer;
 
 import javax.annotation.PostConstruct;
 
@@ -13,9 +13,11 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.task.TaskExecutor;
 import org.springframework.http.HttpMethod;
 import org.springframework.messaging.simp.stomp.StompFrameHandler;
 import org.springframework.messaging.simp.stomp.StompHeaders;
+import org.springframework.messaging.simp.stomp.StompSession.Subscription;
 import org.springframework.stereotype.Component;
 import org.springframework.web.client.RestTemplate;
 
@@ -63,7 +65,7 @@ public class MultiplayerPresenter implements FxmlController {
 	private WebView webView;
 
 	@Autowired
-	private ExecutorService executorService;
+	private TaskExecutor taskExecutor;
 
 	@Autowired
 	private RestTemplate restTemplate;
@@ -128,7 +130,7 @@ public class MultiplayerPresenter implements FxmlController {
 
 		backButton.setOnAction(backButtonHandler);
 
-		executorService.execute(() -> {
+		taskExecutor.execute(() -> {
 			while (subscriptionsLatch.getCount() != 0) {
 				try {
 					subscriptionsLatch.await();
@@ -144,12 +146,14 @@ public class MultiplayerPresenter implements FxmlController {
 			boolean joinedGame = false;
 			for (Game game : games) {
 				if (game.getPlayerTwo() == null) {
+					log.debug("Joining game...");
 					stompTemplate.getSession().send("/app/joinGame", game.getId());
 					joinedGame = true;
 					break;
 				}
 			}
 			if (!joinedGame) {
+				log.debug("Hosting game...");
 				stompTemplate.getSession().send("/app/hostGame", null);
 			}
 		});
@@ -165,7 +169,7 @@ public class MultiplayerPresenter implements FxmlController {
 		} else if (keyCode == KeyCode.ENTER) {
 			final String guess = playerBoard.handleEnter();
 			if (guess != null) {
-				executorService.execute(() -> stompTemplate.getSession().send("/app/guess", guess));
+				taskExecutor.execute(() -> stompTemplate.getSession().send("/app/guess", guess));
 				repaint();
 			}
 		} else if (keyCode.isLetterKey()) {
@@ -181,21 +185,18 @@ public class MultiplayerPresenter implements FxmlController {
 
 	@PostConstruct
 	private void postConstruct() {
-		executorService.execute(() -> {
+		Consumer<Subscription> defaultCallback = subscription -> {
-			stompTemplate.subscribe(Destinations.GAME_CLOSED, new GameClosedHandler(),
+			subscriptionsLatch.countDown();
-					subscription -> subscriptionsLatch.countDown());
+			log.debug("Subscription received: {}", subscription.getSubscriptionHeaders());
-			stompTemplate.subscribe(Destinations.GAME_HOSTED, new GameHostedHandler(),
+		};
-					subscription -> subscriptionsLatch.countDown());
+		taskExecutor.execute(() -> {
-			stompTemplate.subscribe(Destinations.GAME_JOINED, new GameJoinedHandler(),
+			stompTemplate.subscribe(Destinations.GAME_CLOSED, new GameClosedHandler(), defaultCallback);
-					subscription -> subscriptionsLatch.countDown());
+			stompTemplate.subscribe(Destinations.GAME_HOSTED, new GameHostedHandler(), defaultCallback);
-			stompTemplate.subscribe(Destinations.GAME_LEFT, new GameLeftHandler(),
+			stompTemplate.subscribe(Destinations.GAME_JOINED, new GameJoinedHandler(), defaultCallback);
-					subscription -> subscriptionsLatch.countDown());
+			stompTemplate.subscribe(Destinations.GAME_LEFT, new GameLeftHandler(), defaultCallback);
-			stompTemplate.subscribe("/user" + Destinations.OPPONENT_JOINED, new OpponentJoinedHandler(),
+			stompTemplate.subscribe("/user" + Destinations.OPPONENT_JOINED, new OpponentJoinedHandler(), defaultCallback);
-					subscription -> subscriptionsLatch.countDown());
+			stompTemplate.subscribe("/user" + Destinations.OPPONENT_REPORTS, new OpponentReportHandler(), defaultCallback);
-			stompTemplate.subscribe("/user" + Destinations.OPPONENT_REPORTS, new OpponentReportHandler(),
+			stompTemplate.subscribe("/user" + Destinations.PLAYER_REPORTS, new PlayerReportHandler(), defaultCallback);
-					subscription -> subscriptionsLatch.countDown());
-			stompTemplate.subscribe("/user" + Destinations.PLAYER_REPORTS, new PlayerReportHandler(),
-					subscription -> subscriptionsLatch.countDown());
 		});
 	}
 

client/src/main/java/lingo/client/multiplayer/StompTemplate.java

@@ -1,7 +1,6 @@
 package lingo.client.multiplayer;
 
 import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.ExecutorService;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.function.Consumer;
 
@@ -12,6 +11,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.task.TaskExecutor;
+import org.springframework.messaging.simp.stomp.StompCommand;
 import org.springframework.messaging.simp.stomp.StompFrameHandler;
 import org.springframework.messaging.simp.stomp.StompHeaders;
 import org.springframework.messaging.simp.stomp.StompSession;
@@ -29,7 +30,7 @@ public class StompTemplate {
 	private String webSocketUrl;
 
 	@Autowired
-	private ExecutorService executorService;
+	private TaskExecutor taskExecutor;
 
 	@Autowired
 	private WebSocketStompClient stompClient;
@@ -48,8 +49,9 @@ public class StompTemplate {
 
 	@PostConstruct
 	private void postConstruct() {
-		executorService.execute(() -> stompClient.connect(webSocketUrl, new WebSocketSessionHandler()));
+		log.info("Connecting to STOMP endpoint: " + webSocketUrl);
-		new Thread(new WebSocketSessionListener()).start();
+		taskExecutor.execute(() -> stompClient.connect(webSocketUrl, new WebSocketSessionHandler()));
+		taskExecutor.execute(new WebSocketSessionListener());
 	}
 
 	@PreDestroy
@@ -74,17 +76,17 @@ public class StompTemplate {
 	}
 
 	private class SubscriptionRequest {
-		public final String destination;
+		final String destination;
-		public final StompFrameHandler handler;
+		final StompFrameHandler handler;
-		public final Consumer<Subscription> callback;
+		final Consumer<Subscription> callback;
 
-		public SubscriptionRequest(String destination, StompFrameHandler handler, Consumer<Subscription> callback) {
+		SubscriptionRequest(String destination, StompFrameHandler handler, Consumer<Subscription> callback) {
 			this.destination = destination;
 			this.handler = handler;
 			this.callback = callback;
 		}
 
-		public void onSubscribed(Subscription subscription) {
+		void onSubscribed(Subscription subscription) {
 			if (callback != null) {
 				callback.accept(subscription);
 			}
@@ -97,6 +99,18 @@ public class StompTemplate {
 			log.info("Connected to STOMP endpoint");
 			stompSession = session;
 		}
+
+		@Override
+		public void handleException(StompSession session, StompCommand command, StompHeaders headers, byte[] payload, Throwable exception) {
+			log.error("STOMP session exception", exception);
+			super.handleException(session, command, headers, payload, exception);
+		}
+
+		@Override
+		public void handleTransportError(StompSession session, Throwable exception) {
+			log.error("STOMP session transport error", exception);
+			super.handleTransportError(session, exception);
+		}
 	}
 
 	private class WebSocketSessionListener implements Runnable {
@@ -114,6 +128,7 @@ public class StompTemplate {
 				}
 				try {
 					final SubscriptionRequest request = subscriptionRequests.take();
+					log.debug("Subscribing to destination: {}", request.destination);
 					final Subscription subscription = stompSession.subscribe(request.destination, request.handler);
 					request.onSubscribed(subscription);
 				} catch (InterruptedException e) {

server/pom.xml

@@ -43,8 +43,10 @@
 					<!-- Add src/main/resources to the classpath -->
 					<!-- Remove duplicate resources from target/classes -->
 					<addResources>true</addResources>
-					<!-- Add src/main/config to the classpath -->
+					<folders>
-					<folders>src/main/config</folders>
+						<!-- Add src/main/config to the classpath -->
+						<folder>${project.basedir}/src/main/config</folder>
+					</folders>
 				</configuration>
 				<executions>
 					<!-- Repackage as executable JAR (java -jar) -->

server/src/main/config/application.yaml

@@ -3,3 +3,9 @@
 server:
   address: localhost
   port: 8080
+
+# Logging
+logging:
+  level:
+    lingo: DEBUG
+    web: DEBUG