Packages

  • package root
    Definition Classes
    root
  • package com
    Definition Classes
    root
  • package twitter

    Start with com.twitter.finagle.

    Definition Classes
    com
  • package finagle

    Finagle is an extensible RPC system.

    Finagle is an extensible RPC system.

    Services are represented by class com.twitter.finagle.Service. Clients make use of com.twitter.finagle.Service objects while servers implement them.

    Finagle contains a number of protocol implementations; each of these implement Client and/or com.twitter.finagle.Server. For example, Finagle's HTTP implementation, com.twitter.finagle.Http (in package finagle-http), exposes both.

    Thus a simple HTTP server is built like this:

    import com.twitter.finagle.{Http, Service}
    import com.twitter.finagle.http.{Request, Response}
    import com.twitter.util.{Await, Future}
    
    val service = new Service[Request, Response] {
      def apply(req: Request): Future[Response] =
        Future.value(Response())
    }
    val server = Http.server.serve(":8080", service)
    Await.ready(server)

    We first define a service to which requests are dispatched. In this case, the service returns immediately with a HTTP 200 OK response, and with no content.

    This service is then served via the Http protocol on TCP port 8080. Finally we wait for the server to stop serving.

    We can now query our web server:

    % curl -D - localhost:8080
    HTTP/1.1 200 OK

    Building an HTTP client is also simple. (Note that type annotations are added for illustration.)

    import com.twitter.finagle.{Http, Service}
    import com.twitter.finagle.http.{Request, Response}
    import com.twitter.util.{Future, Return, Throw}
    
    val client: Service[Request, Response] = Http.client.newService("localhost:8080")
    val f: Future[Response] = client(Request()).respond {
      case Return(rep) =>
        printf("Got HTTP response %s\n", rep)
      case Throw(exc) =>
        printf("Got error %s\n", exc)
    }

    Http.client.newService("localhost:8080") constructs a new com.twitter.finagle.Service instance connected to localhost TCP port 8080. We then issue a HTTP/1.1 GET request to URI "/". The service returns a com.twitter.util.Future representing the result of the operation. We listen to this future, printing an appropriate message when the response arrives.

    The Finagle homepage contains useful documentation and resources for using Finagle.

    Definition Classes
    twitter
  • package client
    Definition Classes
    finagle
  • object StatsScoping

    Stats scoping enabled the modification of the StatsReceiver scoping on a per-endpoint basis.

    Stats scoping enabled the modification of the StatsReceiver scoping on a per-endpoint basis. For instance, if a client has endpoints in multiple zones, a scoper might add a per-zone scope.

    Definition Classes
    client
  • Role
  • Scoper

case class Scoper(scoper: ScoperFunction) extends Product with Serializable

A Scoper is a function that takes an existing StatsReceiver and an arbitrary address metadata map and computes a new StatsReceiver.

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Instance Constructors

  1. new Scoper(scoper: ScoperFunction)

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  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##(): Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
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  5. def clone(): AnyRef
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  8. final def getClass(): Class[_]
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    @native()
  9. final def isInstanceOf[T0]: Boolean
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  10. def mk(): (Scoper, Param[Scoper])
  11. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  12. final def notify(): Unit
    Definition Classes
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    @native()
  13. final def notifyAll(): Unit
    Definition Classes
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    @native()
  14. val scoper: ScoperFunction
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  16. final def wait(): Unit
    Definition Classes
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    @throws( ... )
  17. final def wait(arg0: Long, arg1: Int): Unit
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  18. final def wait(arg0: Long): Unit
    Definition Classes
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