Migrate groovy router from Kotlin to Java. We CANNOT call Groovy from Kotlin, only from Java. Migrate App and Config to Java to be able to call Groovy view. Also, migrate unit test to Java.

Author: fmcarvalho

README.md

@@ -0,0 +1,7 @@
+## Usage
+
+Run with:
+
+```
+./gradlew bootRun
+```

build.gradle.kts

@@ -10,13 +10,24 @@ plugins {
 
 group = "pt.isel"
 version = "0.0.1-SNAPSHOT"
-java.sourceCompatibility = JavaVersion.VERSION_11
+java.sourceCompatibility = JavaVersion.VERSION_17
 
 repositories {
 	mavenCentral()
 	mavenLocal()
 }
 
+sourceSets {
+	main {
+		java {
+			setSrcDirs(emptyList<String>())    // no source dirs for the java compiler
+		}
+		groovy {
+			setSrcDirs(listOf("src/main/java", "src/main/groovy"))  // compile   everything in src/ with groovy
+		}
+	}
+}
+
 dependencies {
 	implementation("org.slf4j:slf4j-simple:2.0.6")
 	/**
@@ -57,6 +68,15 @@ tasks.withType<KotlinCompile> {
 	}
 }
 
+tasks
+	.getByName<AbstractCompile>("compileGroovy")
+	.dependsOn(tasks.getByName<KotlinCompile>("compileKotlin"))
+
+tasks
+	.getByName<AbstractCompile>("compileGroovy")
+	.classpath += files(tasks.getByName<KotlinCompile>("compileKotlin").destinationDirectory)
+
 tasks.withType<Test> {
 	useJUnitPlatform()
 }
+

src/main/java/pt/isel/genius/GeniusApplication.java

@@ -0,0 +1,19 @@
+package pt.isel.genius;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GeniusApplication {
+
+    public static void main(String[] args) {
+        /**
+         * Limit request handler threads to a single worker thread.
+         * Thus, handlers should be non-blocking to allow multiple requests concurrently.
+         * NOTICE minimum default to 4.
+         */
+        System.setProperty("reactor.netty.ioWorkerCount", "1"); // minimum default to 4
+        SpringApplication.run(GeniusApplication.class, args);
+    }
+}
+

src/main/java/pt/isel/genius/WebConfig.java

@@ -0,0 +1,35 @@
+package pt.isel.genius;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import pt.isel.genius.groovy.ArtistRouterGroovy;
+import pt.isel.genius.htmlflow.ArtistRouterHtmlFlowKt;
+import pt.isel.genius.kotlinx.ArtistRouterKotlinxKt;
+import pt.isel.genius.thymeleaf.ArtistRouterThymeleafKt;
+
+@Configuration
+@ComponentScan
+public class WebConfig {
+    @Bean
+    public RouterFunction<ServerResponse> routerArtistHtmlFlow() {
+        return ArtistRouterHtmlFlowKt.artistRouterHtmlFlow();
+    }
+
+    @Bean
+    public RouterFunction<ServerResponse> routerArtistKotlinX() {
+        return ArtistRouterKotlinxKt.artistCoRouterKotlinX();
+    }
+
+    @Bean
+    public RouterFunction<ServerResponse> routerArtistThymeleaf() {
+        return ArtistRouterThymeleafKt.artistRouterThymeleaf();
+    }
+
+    @Bean
+    public RouterFunction<ServerResponse> routerArtistGroovy() {
+        return ArtistRouterGroovy.artistRouterHtmlGroovy();
+    }
+}

src/main/java/pt/isel/genius/groovy/ArtistRouterGroovy.java

@@ -0,0 +1,33 @@
+package pt.isel.genius.groovy;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.RouterFunctions;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import pt.isel.genius.AppendableWriter;
+import pt.isel.genius.GeniusRepositoryKt;
+import reactor.core.publisher.Mono;
+
+public class ArtistRouterGroovy {
+    public static RouterFunction<ServerResponse> artistRouterHtmlGroovy() {
+        return RouterFunctions
+                .route()
+                .path("/groovy", builder -> builder
+                        .GET("/reactive/playlist", req -> handlerPlaylist(req))
+                )
+                .build();
+    }
+
+    private static Mono<ServerResponse> handlerPlaylist(ServerRequest req) {
+        final var out = new AppendableWriter(writer -> {
+            ArtistViewGroovy.playlistView(writer, GeniusRepositoryKt.getTracks());
+            return null;
+        });
+        return ServerResponse
+                .ok()
+                .contentType(MediaType.TEXT_HTML)
+                .body(out.asFlux(), new ParameterizedTypeReference<String>() {});
+    }
+}