Add nullability annotations to smoke-test/spring-boot-smoke-test-websocket-undertow

See gh-46587

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/client/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.websocket.undertow.client;
+
+import org.jspecify.annotations.NullMarked;

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/echo/DefaultEchoService.java

@@ -16,11 +16,13 @@
 
 package smoketest.websocket.undertow.echo;
 
+import org.jspecify.annotations.Nullable;
+
 public class DefaultEchoService implements EchoService {
 
 	private final String echoFormat;
 
-	public DefaultEchoService(String echoFormat) {
+	public DefaultEchoService(@Nullable String echoFormat) {
 		this.echoFormat = (echoFormat != null) ? echoFormat : "%s";
 	}
 

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/echo/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.websocket.undertow.echo;
+
+import org.jspecify.annotations.NullMarked;

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.websocket.undertow;
+
+import org.jspecify.annotations.NullMarked;

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/reverse/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.websocket.undertow.reverse;
+
+import org.jspecify.annotations.NullMarked;

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/snake/Location.java

@@ -16,6 +16,8 @@
 
 package smoketest.websocket.undertow.snake;
 
+import org.jspecify.annotations.Nullable;
+
 public class Location {
 
 	/**
@@ -44,7 +46,7 @@ public class Location {
 	}
 
 	@Override
-	public boolean equals(Object o) {
+	public boolean equals(@Nullable Object o) {
 		if (this == o) {
 			return true;
 		}

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/snake/SnakeTimer.java

@@ -24,6 +24,7 @@ import java.util.TimerTask;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import jakarta.annotation.Nullable;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
@@ -40,7 +41,7 @@ public final class SnakeTimer {
 
 	private static final ConcurrentHashMap<Integer, Snake> snakes = new ConcurrentHashMap<>();
 
-	private static Timer gameTimer = null;
+	private static @Nullable Timer gameTimer;
 
 	private SnakeTimer() {
 	}

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/snake/SnakeWebSocketHandler.java

@@ -21,6 +21,9 @@ import java.util.Iterator;
 import java.util.Random;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import org.jspecify.annotations.Nullable;
+
+import org.springframework.util.Assert;
 import org.springframework.web.socket.CloseStatus;
 import org.springframework.web.socket.TextMessage;
 import org.springframework.web.socket.WebSocketSession;
@@ -34,7 +37,7 @@ public class SnakeWebSocketHandler extends TextWebSocketHandler {
 
 	private final int id;
 
-	private Snake snake;
+	private @Nullable Snake snake;
 
 	public static String getRandomHexColor() {
 		float hue = random.nextFloat();
@@ -79,6 +82,7 @@ public class SnakeWebSocketHandler extends TextWebSocketHandler {
 
 	@Override
 	protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
+		Assert.state(this.snake != null, "'snake' must not be null");
 		String payload = message.getPayload();
 		switch (payload) {
 			case "west" -> this.snake.setDirection(Direction.WEST);
@@ -90,6 +94,7 @@ public class SnakeWebSocketHandler extends TextWebSocketHandler {
 
 	@Override
 	public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
+		Assert.state(this.snake != null, "'snake' must not be null");
 		SnakeTimer.removeSnake(this.snake);
 		SnakeTimer.broadcast(String.format("{'type': 'leave', 'id': %d}", this.id));
 	}

smoke-test/spring-boot-smoke-test-websocket-undertow/src/main/java/smoketest/websocket/undertow/snake/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@NullMarked
+package smoketest.websocket.undertow.snake;
+
+import org.jspecify.annotations.NullMarked;