如何在Akka调度程序中使用自定义执行程序

时间:2014-07-30 04:56:23

标签: scala akka executorservice

我正在尝试在Akka中为调度程序使用自定义执行程序。

具体来说,我想用自己的(日志记录,调试等)包装一个现有的执行器。

我查看了documentation的相关部分:

  

默认调度程序可以配置,默认情况下是一个带有“fork-join-executor”的Dispatcher,在大多数情况下可以提供出色的性能。

  

使用“fork-join-executor”,“thread-pool-executor”或akka.dispatcher.ExecutorServiceConfigurator的FQCN指定使用“executor”

(我不明白FQCN是什么。)

我该怎么做?

1 个答案:

答案 0 :(得分:4)

FQCN ==完全合格的班级名称,即包裹名称+班级名称,例如:

java.lang.String< - FQCN for String

以下是内置ThreadPoolExecutor的ExecutorServiceConfigurator示例:

class ThreadPoolExecutorConfigurator(config: Config, prerequisites: DispatcherPrerequisites) extends ExecutorServiceConfigurator(config, prerequisites) {

  val threadPoolConfig: ThreadPoolConfig = createThreadPoolConfigBuilder(config, prerequisites).config

  protected def createThreadPoolConfigBuilder(config: Config, prerequisites: DispatcherPrerequisites): ThreadPoolConfigBuilder = {
    import akka.util.Helpers.ConfigOps
    ThreadPoolConfigBuilder(ThreadPoolConfig())
      .setKeepAliveTime(config.getMillisDuration("keep-alive-time"))
      .setAllowCoreThreadTimeout(config getBoolean "allow-core-timeout")
      .setCorePoolSizeFromFactor(config getInt "core-pool-size-min", config getDouble "core-pool-size-factor", config getInt "core-pool-size-max")
      .setMaxPoolSizeFromFactor(config getInt "max-pool-size-min", config getDouble "max-pool-size-factor", config getInt "max-pool-size-max")
      .configure(
        Some(config getInt "task-queue-size") flatMap {
          case size if size > 0 ⇒
            Some(config getString "task-queue-type") map {
              case "array"       ⇒ ThreadPoolConfig.arrayBlockingQueue(size, false) //TODO config fairness?
              case "" | "linked" ⇒ ThreadPoolConfig.linkedBlockingQueue(size)
              case x             ⇒ throw new IllegalArgumentException("[%s] is not a valid task-queue-type [array|linked]!" format x)
            } map { qf ⇒ (q: ThreadPoolConfigBuilder) ⇒ q.setQueueFactory(qf) }
          case _ ⇒ None
        })
  }

  def createExecutorServiceFactory(id: String, threadFactory: ThreadFactory): ExecutorServiceFactory =
    threadPoolConfig.createExecutorServiceFactory(id, threadFactory)
}

来源:https://github.com/akka/akka/blob/v2.3.4/akka-actor/src/main/scala/akka/dispatch/AbstractDispatcher.scala#L344