如何在 router.route("/api/*").handler 中使用协程?

How to use coroutine inside the router.route("/api/*").handler?

我正尝试在路由处理程序 lambda 中使用协程,如下所示:

  private suspend fun createRoutes(router: Router, auth: OAuth2Auth): Unit {


    val oauth2 = OAuth2AuthHandler.create(vertx, auth)
    val authz = KeycloakAuthorization.create()


    router.route().handler(LoggerHandler.create())

    router.route("/api/*").handler(oauth2)

     router.route("/api/greet").handler {

      println(RoleBasedAuthorization.create("ad-admins").match(it.user()))

      authz.getAuthorizations(it.user()).await()
    }

  }

编译器在 authz.getAuthorizations(it.user()).await() 上抱怨 Suspension functions can be called only within coroutine body。 我做错了什么?

全部代码:

class MainVerticle : CoroutineVerticle() {

  private suspend fun initConfig(): JsonObject {
    val yamlConfigOpts = ConfigStoreOptions()
      .setFormat("yaml")
      .setType("file")
      .setConfig(JsonObject().put("path", "config.yaml"))

    val configRetrieverOpts = ConfigRetrieverOptions()
      .addStore(yamlConfigOpts)

    val configRetriever = ConfigRetriever.create(vertx, configRetrieverOpts)

    return configRetriever.config.await()
  }


  private suspend fun createJwtAuth(): OAuth2Auth =

    KeycloakAuth.discover(
      vertx,
      OAuth2Options()
        .setFlow(OAuth2FlowType.AUTH_CODE)
        .setClientID("svc")
        .setClientSecret("9d782e45-67e7-44b1-9b74-864f45f9a18f")
        .setSite("https://oic.dev.databaker.io/auth/realms/databaker")
    ).await()


  private suspend fun createRoutes(router: Router, auth: OAuth2Auth): Unit {


    val oauth2 = OAuth2AuthHandler.create(vertx, auth)
    val authz = KeycloakAuthorization.create()


    router.route().handler(LoggerHandler.create())

    router.route("/api/*").handler(oauth2)

    router.route("/api/greet").handler {

      println(RoleBasedAuthorization.create("ad-admins").match(it.user()))

      authz.getAuthorizations(it.user()).await()
    }

  }


  private suspend fun server(router: Router): HttpServer {
    val server = vertx.createHttpServer()

    return server.requestHandler(router)
      .listen(8080)
      .onSuccess {
        println("HTTP server started on port ${it.actualPort()}")
      }
      .onFailure {
        println("Failed to start the server. Reason ${it.message}")
      }
      .await()
  }


  override suspend fun start() {

    val router = Router.router(vertx)


    createRoutes(router, createJwtAuth())
    server(router)

  }

}

提示:我正在使用 Vertx 4.0.0 RC1

编译器,因为 authz.getAuthorizations(it.user()).await() 未在挂起的函数中调用:它是从 Vert.x Web 路由处理程序调用的。

您必须用 launch:

包装您的调用
router.route("/api/greet").handler {
  println(RoleBasedAuthorization.create("ad-admins").match(it.user()))
  launch {
    authz.getAuthorizations(it.user()).await()
  }
}

鉴于此代码是在 CoroutineVerticle 中定义的,协程将绑定到 Verticle 上下文(以及在 Verticle 的事件循环中调用的代码)。