refactor: simplify WebSocketConfig with Annotation

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,12 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="PyShadowingBuiltinsInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <option name="ignoredNames">
+        <list>
+          <option value="id" />
+        </list>
+      </option>
+    </inspection_tool>
+  </profile>
+</component>

backend/src/main/kotlin/com/github/sor2171/backend/config/WebSocketConfig.kt

@@ -1,29 +1,24 @@
 package com.github.sor2171.backend.config
 
-import com.github.sor2171.backend.handler.TestHandler
-import com.github.sor2171.backend.handler.v1.ExampleHandler
+import com.github.sor2171.backend.handler.WsHandler
 import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.web.reactive.HandlerMapping
 import org.springframework.web.reactive.handler.SimpleUrlHandlerMapping
+import org.springframework.web.reactive.socket.WebSocketHandler
 import org.springframework.web.reactive.socket.server.support.WebSocketHandlerAdapter
+import kotlin.reflect.full.findAnnotation
 
 @Configuration
 class WebSocketConfig(
-    private val exampleHandler: ExampleHandler,
-    private val testHandler: TestHandler
+    private val handlers: List<WebSocketHandler>
 ) {
-
     @Bean
     fun handlerMapping(): HandlerMapping {
-        val map = mapOf(
-            "/ws/v1/example" to exampleHandler,
-            "/ws/test" to testHandler
-        )
-        val mapping = SimpleUrlHandlerMapping()
-        mapping.urlMap = map
-        mapping.order = 1
-        return mapping
+        val map = handlers.associateBy {
+            it::class.findAnnotation<WsHandler>()!!.path
+        }
+        return SimpleUrlHandlerMapping(map, 1)
     }
 
     @Bean

backend/src/main/kotlin/com/github/sor2171/backend/handler/TestHandler.kt

@@ -6,9 +6,9 @@ import org.springframework.web.reactive.socket.WebSocketSession
 import reactor.core.publisher.Mono
 
 @Component
+@WsHandler("/ws/test")
 class TestHandler : WebSocketHandler {
     override fun handle(session: WebSocketSession): Mono<Void> {
-        // ws://localhost:8080/ws/test
         val output = session.receive()
             .map { msg ->
                 val userText = msg.payloadAsText

backend/src/main/kotlin/com/github/sor2171/backend/handler/WsHandler.kt

@@ -0,0 +1,5 @@
+package com.github.sor2171.backend.handler
+
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class WsHandler(val path: String)

backend/src/main/kotlin/com/github/sor2171/backend/handler/v1/ExampleHandler.kt

@@ -1,5 +1,6 @@
 package com.github.sor2171.backend.handler.v1
 
+import com.github.sor2171.backend.handler.WsHandler
 import com.github.sor2171.backend.service.WsTokenService
 import org.springframework.stereotype.Component
 import org.springframework.web.reactive.socket.WebSocketHandler
@@ -7,11 +8,11 @@ import org.springframework.web.reactive.socket.WebSocketSession
 import reactor.core.publisher.Mono
 
 @Component
+@WsHandler("/ws/v1/example")
 class ExampleHandler(
     private val wsTokenService: WsTokenService,
 ) : WebSocketHandler {
     override fun handle(session: WebSocketSession): Mono<Void> {
-        // ws://localhost:8080/ws/v1/example?token=
         val output = session.receive()
             .map { msg ->
                 val userText = msg.payloadAsText