VirtualThreadApiApplication

Author: LOG-INFO

README.md

@@ -8,13 +8,27 @@
 - JVM 20
 - Kotlin 1.9.0-Beta
 - Spring Boot 3.1.0
+- Apache Tomcat 10.1.8
 
 참고
+
 - https://youtrack.jetbrains.com/issue/KT-57669
-  -  Kotlin 1.9.0-Beta 부터 JVM 20 지원
+  - Kotlin 1.9.0-Beta 부터 JVM 20 지원
+
+## 관련 아티클
+
+- https://spring.io/blog/2022/10/11/embracing-virtual-threads
 
 ## Trouble Shooting
 
-#### ![img.png](README-image/img.png)
+### Kotlin JVM 버전 관련 컴파일러 에러
+
+#### 문제
+
+![img.png](README-image/img.png)
+
+#### 해결
+
 - project settings에서 Language Level 변경
-- ![img_1.png](README-image/img_1.png)
+  - ![img_1.png](README-image/img_1.png)
+- IntelliJ 버그인지, 껐다 켜줘야 적용됨

settings.gradle.kts

@@ -1,4 +1,5 @@
 
 rootProject.name = "java-concurrency-practice"
 include("platform-thread-api")
+include("virtual-thread-api")
 include("domain")

virtual-thread-api/build.gradle.kts

@@ -0,0 +1,5 @@
+dependencies {
+    implementation(project(":domain"))
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation(kotlin("stdlib-jdk8"))
+}

virtual-thread-api/src/main/kotlin/info/log/virtualthreadapi/VirtualThreadApiApplication.kt

@@ -0,0 +1,31 @@
+package info.log.virtualthreadapi
+
+import org.apache.coyote.ProtocolHandler
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration
+import org.springframework.boot.runApplication
+import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer
+import org.springframework.context.annotation.Bean
+import org.springframework.core.task.AsyncTaskExecutor
+import org.springframework.core.task.support.TaskExecutorAdapter
+import java.util.concurrent.Executors
+
+
+@SpringBootApplication
+class VirtualThreadApiApplication {
+    @Bean(TaskExecutionAutoConfiguration.APPLICATION_TASK_EXECUTOR_BEAN_NAME)
+    fun asyncTaskExecutor(): AsyncTaskExecutor {
+        return TaskExecutorAdapter(Executors.newVirtualThreadPerTaskExecutor())
+    }
+
+    @Bean
+    fun protocolHandlerVirtualThreadExecutorCustomizer(): TomcatProtocolHandlerCustomizer<*> {
+        return TomcatProtocolHandlerCustomizer { protocolHandler: ProtocolHandler ->
+            protocolHandler.executor = Executors.newVirtualThreadPerTaskExecutor()
+        }
+    }
+}
+
+fun main(args: Array<String>) {
+    runApplication<VirtualThreadApiApplication>(*args)
+}

virtual-thread-api/src/main/kotlin/info/log/virtualthreadapi/web/HelloController.kt

@@ -0,0 +1,15 @@
+package info.log.virtualthreadapi.web
+
+import info.log.domain.Person
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RestController
+
+
+@RestController
+class HelloController {
+
+    @GetMapping("/hello")
+    fun hello(): List<Person> {
+        return Person.createPeopleListRandomly()
+    }
+}

virtual-thread-api/src/main/resources/application.yml

@@ -0,0 +1,6 @@
+server:
+  port: 10000
+  tomcat:
+    max-connections: 8192
+    accept-count: 100
+    connection-timeout: 20000