play scala 中的 ApplicationLifecycle 挂钩中的错误类型可调用
Wrong type of callable in ApplicationLifecycle hooks in play scala
我正在尝试在我们的应用程序 (Play Scala) 中注册服务停止挂钩。
基于这些文档,它非常简单。 https://www.playframework.com/documentation/2.8.x/PluginsToModules#Create-a-Module-class
应该是这样的:
@Singleton
class AblyService @Inject() (ablyRealtime: AblyRealtime, lifecycle: ApplicationLifecycle) {
def getChannel(name: String): Channel = ablyRealtime.channels.get(name)
lifecycle.addStopHook { () =>
Future.successful(ablyRealtime.close())
}
}
但是,我遇到类型不匹配错误:
[error] /Users/shurikag/ProcessStreet/dev/process-street/app/features/ably/AblyService.scala:15:22: type mismatch;
[error] found : scala.concurrent.Future[Unit]
[error] required: java.util.concurrent.CompletionStage[_]
[error] Future.successful(ablyRealtime.close())
正确的做法是什么?
猜猜你使用 Java API play.inject.ApplicationLifecycle
(which expects CompletionStage
) and not the Scala one(它接受 Future
)。
我正在尝试在我们的应用程序 (Play Scala) 中注册服务停止挂钩。
基于这些文档,它非常简单。 https://www.playframework.com/documentation/2.8.x/PluginsToModules#Create-a-Module-class 应该是这样的:
@Singleton
class AblyService @Inject() (ablyRealtime: AblyRealtime, lifecycle: ApplicationLifecycle) {
def getChannel(name: String): Channel = ablyRealtime.channels.get(name)
lifecycle.addStopHook { () =>
Future.successful(ablyRealtime.close())
}
}
但是,我遇到类型不匹配错误:
[error] /Users/shurikag/ProcessStreet/dev/process-street/app/features/ably/AblyService.scala:15:22: type mismatch;
[error] found : scala.concurrent.Future[Unit]
[error] required: java.util.concurrent.CompletionStage[_]
[error] Future.successful(ablyRealtime.close())
正确的做法是什么?
猜猜你使用 Java API play.inject.ApplicationLifecycle
(which expects CompletionStage
) and not the Scala one(它接受 Future
)。