Add Platform flag in Docker Image to show JVM or NATIVE in the Web UI

Author: RawSanj

src/main/docker/Dockerfile.jvm

@@ -4,5 +4,6 @@ COPY ../../.. ./
 RUN mvn clean package --file pom.xml
 
 FROM eclipse-temurin:17-jdk-jammy
+ENV RUNTIME_PLATFORM=JVM
 COPY --from=build /app/target/spring-redis-websocket-*.jar app.jar
 ENTRYPOINT ["java","-jar","/app.jar"]

src/main/docker/Dockerfile.native

@@ -4,5 +4,6 @@ COPY ../../.. ./
 RUN ./mvnw -Pnative clean package -DskipNativeImage=false --file pom.xml
 
 FROM ubuntu:jammy
+ENV RUNTIME_PLATFORM=NATIVE
 COPY --from=build /app/target/spring-redis-websocket spring-redis-websocket
 CMD ["/spring-redis-websocket"]

src/main/java/com/github/rawsanj/config/RuntimeHintsConfig.java

@@ -2,6 +2,7 @@
 
 import com.github.rawsanj.model.ChatMessage;
 import com.github.rawsanj.model.Message;
+import com.github.rawsanj.model.Platform;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.RuntimeHintsRegistrar;
 import org.springframework.context.annotation.ImportRuntimeHints;
@@ -17,7 +18,8 @@ static class SerdeRuntimeHints implements RuntimeHintsRegistrar {
 		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
 			hints.serialization()
 				.registerType(ChatMessage.class)
-				.registerType(Message.class);
+				.registerType(Message.class)
+				.registerType(Platform.class);
 		}
 	}
 }

src/main/java/com/github/rawsanj/handler/WebHttpHandler.java

@@ -2,9 +2,11 @@
 
 import com.github.rawsanj.messaging.RedisChatMessagePublisher;
 import com.github.rawsanj.model.Message;
+import com.github.rawsanj.model.Platform;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.Environment;
 import org.springframework.core.io.Resource;
 import org.springframework.http.MediaType;
 import org.springframework.web.reactive.function.server.RouterFunction;
@@ -13,17 +15,21 @@
 import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
 import static org.springframework.web.reactive.function.server.RequestPredicates.POST;
 import static org.springframework.web.reactive.function.server.RouterFunctions.route;
-import static org.springframework.web.reactive.function.server.ServerResponse.ok;
 
 @Configuration(proxyBeanMethods = false)
 public class WebHttpHandler {
 
 	@Bean
-	public RouterFunction<ServerResponse> htmlRouter(@Value("classpath:/static/index.html") Resource html, RedisChatMessagePublisher redisChatMessagePublisher) {
-		return route(GET("/"), request -> ok().contentType(MediaType.TEXT_HTML).bodyValue(html))
+	public RouterFunction<ServerResponse> htmlRouter(@Value("classpath:/static/index.html") Resource html,
+													 RedisChatMessagePublisher redisChatMessagePublisher, Environment environment) {
+		return route(GET("/"), request -> ServerResponse.ok().contentType(MediaType.TEXT_HTML).bodyValue(html))
 			.andRoute(POST("/message"), request -> request.bodyToMono(Message.class)
 				.flatMap(message -> redisChatMessagePublisher.publishChatMessage(message.getMessage()))
-				.flatMap(aLong -> ServerResponse.ok().bodyValue(new Message("Message Sent Successfully!."))));
+				.flatMap(aLong -> ServerResponse.ok().bodyValue(new Message("Message Sent Successfully!.")))
+			)
+			.andRoute(
+				GET("/platform"), request -> ServerResponse.ok().bodyValue(new Platform(environment.getProperty("RUNTIME_PLATFORM", "JVM")))
+			);
 	}
 
 }

src/main/java/com/github/rawsanj/model/Platform.java

@@ -0,0 +1,16 @@
+package com.github.rawsanj.model;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)
+public class Platform implements Serializable {
+	private String name;
+}

src/main/resources/static/app.js

@@ -1,5 +1,7 @@
 $(document).ready(function () {
 
+	initPlatform()
+
 	// define selectors to avoid duplication
 	let $alert = $('#websocket-disconnected');
 	let $userConnected = $("#connect-alert");
@@ -132,7 +134,7 @@ $(document).ready(function () {
 	});
 
 	$("#send-http-message").click(function () {
-		var chatMessage = $chatMessage.val();
+		const chatMessage = $chatMessage.val();
 		$.ajax({
 			url: "/message",
 			type: "POST",
@@ -150,7 +152,7 @@ $(document).ready(function () {
 	});
 
 	$('#chat-message').keypress(function (e) {
-		var key = e.which;
+		const key = e.which;
 		if (key === 13) {
 			sendMessage();
 		}
@@ -173,5 +175,21 @@ $(document).ready(function () {
 		}
 	}
 
+	function initPlatform() {
+		$.ajax({
+			url: "/platform",
+			type: "GET",
+			dataType: "json",
+			contentType: "application/json",
+			success: function (response) {
+				console.log(response);
+				$("#platform").text(response.name);
+			},
+			error: function (err) {
+				console.log(err);
+			}
+		})
+	}
+
 });
 

src/main/resources/static/index.html

@@ -38,7 +38,7 @@
 		<div class="col-sm-8">
 			<div class="card border-danger">
 				<div class="card-header">
-					<h4>Spring Reactive Redis Chat - Native</h4>
+					<h4>Spring Reactive Redis Chat - <span id="platform">JVM</span></h4>
 				</div>
 				<div class="card-body">
 

src/test/java/com/github/rawsanj/config/RuntimeHintsConfigTest.java

@@ -2,6 +2,7 @@
 
 import com.github.rawsanj.model.ChatMessage;
 import com.github.rawsanj.model.Message;
+import com.github.rawsanj.model.Platform;
 import org.junit.jupiter.api.Test;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
@@ -16,5 +17,6 @@ void registerHintsTest() {
 		new RuntimeHintsConfig.SerdeRuntimeHints().registerHints(hints, getClass().getClassLoader());
 		assertThat(RuntimeHintsPredicates.serialization().onType(ChatMessage.class)).accepts(hints);
 		assertThat(RuntimeHintsPredicates.serialization().onType(Message.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.serialization().onType(Platform.class)).accepts(hints);
 	}
 }