关闭Akka HTTP应用程序

Question

我有一个正在运行的Akka HTTP应用程序，我想关闭它。

在我的SBT does not work中按 Ctrl + C （我的shell目前是Windows的Git Bash）。

推荐的优雅关闭Akka应用程序的方法是什么？

Answer 1

从this thread获取灵感，我添加了一条关闭应用程序的应用程序路径：

def shutdownRoute: Route = path("shutdown") {
  Http().shutdownAllConnectionPools() andThen { case _ => system.terminate() }
  complete("Shutting down app")
}

其中system是应用的ActorSystem。

鉴于这条路线，我现在可以用

关闭我的应用程序

curl http://localhost:5000/shutdown

修改

能够远程关闭服务器对于生产代码来说不是一个好主意。在评论中，Henrik指出了一种通过在SBT控制台中点击 Enter 来关闭服务器的不同方式：

StdIn.readLine()
// Unbind from the port and shut down when done
bindingFuture
  .flatMap(_.unbind())
  .onComplete(_ => system.terminate())

对于上下文，我将上面的代码放在服务器初始化的末尾：

// Gets the host and a port from the configuration
val host = system.settings.config.getString("http.host")
val port = system.settings.config.getInt("http.port")

implicit val materializer = ActorMaterializer()

// bindAndHandle requires an implicit ExecutionContext
implicit val ec = system.dispatcher

import akka.http.scaladsl.server.Directives._
val route = path("hi") {
  complete("How's it going?")
}

// Starts the HTTP server
val bindingFuture: Future[ServerBinding] = Http().bindAndHandle(route, host, port)

val log = Logging(system.eventStream, "my-application")

bindingFuture.onComplete {
  case Success(serverBinding) =>
    log.info(s"Server bound to ${serverBinding.localAddress}")

  case Failure(ex) =>
    log.error(ex, "Failed to bind to {}:{}!", host, port)
    system.terminate()
}

log.info("Press enter key to stop...")
// Let the application run until we press the enter key
StdIn.readLine()
// Unbind from the port and shut down when done
bindingFuture
  .flatMap(_.unbind())
  .onComplete(_ => system.terminate())