我有一个基于喷雾的 HTTP 服务。我有一个在这个 HTTP 应用程序中运行的流。现在因为这个流做了很多 I/O,我决定使用一个单独的线程池。我查阅了 Akka 文档,看看我能做些什么来使我的线程池是可配置的。我在 Akka 中遇到了 Dispatcher 概念。所以我尝试在我的 application.conf 中使用它,如下所示:
akka {
io-dispatcher {
# Dispatcher is the name of the event-based dispatcher
type = Dispatcher
# What kind of ExecutionService to use
executor = "fork-join-executor"
# Configuration for the fork join pool
fork-join-executor {
# Min number of threads to cap factor-based parallelism number to
parallelism-min = 2
# Parallelism (threads) ... ceil(available processors * factor)
parallelism-factor = 2.0
# Max number of threads to cap factor-based parallelism number to
parallelism-max = 10
}
# Throughput defines the maximum number of messages to be
# processed per actor before the thread jumps to the next actor.
# Set to 1 for as fair as possible.
throughput = 20
}
}
在我的 Actor 中,我尝试将此配置查找为:
context.system.dispatchers.lookup("akka.io-dispatcher")
当我运行我的服务时,我收到以下错误:
[ERROR] [05/03/2016 12:59:08.673] [my-app-akka.actor.default-dispatcher-2] [akka://my-app/user/myAppSupervisorActor] Dispatcher [akka.io-dispatcher] not configured
akka.ConfigurationException: Dispatcher [akka.io-dispatcher] not configured
at akka.dispatch.Dispatchers.lookupConfigurator(Dispatchers.scala:99)
at akka.dispatch.Dispatchers.lookup(Dispatchers.scala:81)
我的问题是:
我创建的这个 io-dispatcher 线程池是否仅用于 Actor 的?我的意图是将此线程池用于我的流,该流由其中一个 Actor 实例化。然后我将此线程池传递给我的流。
我如何通过从 application.conf 加载调度程序来创建 ExecutionContext?我是否应该使用任何特定的库来读取我的线程池配置并给我一个 ExecutionContext?