设置 Actor 的调度程序

因此，如果你希望为你的 Actor 提供与默认值不同的调度程序，则需要执行两项操作，其中第一项是在 application.conf 中配置调度程序：

my-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 = 100
}

这是另一个使用“thread-pool-executor”的例子：

my-thread-pool-dispatcher {
  # Dispatcher is the name of the event-based dispatcher
  type = Dispatcher
  # What kind of ExecutionService to use
  executor = "thread-pool-executor"
  # Configuration for the thread pool
  thread-pool-executor {
    # minimum number of threads to cap factor-based core number to
    core-pool-size-min = 2
    # No of core threads ... ceil(available processors * factor)
    core-pool-size-factor = 2.0
    # maximum number of threads to cap factor-based number to
    core-pool-size-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 = 100
}

然后，你可以在配置中定义要用于演员的调度程序，例如

akka.actor.deployment {
  /myactor {
    dispatcher = my-dispatcher
  }
}

并使用 config 中指定的名称创建此 actor：

import akka.actor.Props
val myActor = context.actorOf(Props[MyActor], "myactor")

或者你可以使用以下方式查找你的调度员：

import akka.actor.Props
val myActor =
  context.actorOf(Props[MyActor].withDispatcher("my-dispatcher"), "myactor1")