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 transport
    Definition Classes
    finagle
  • QueueTransport
  • StatsTransport
  • Transport
  • TransportContext
  • TransportFactory
  • TransportProxy
c

com.twitter.finagle.transport

TransportContext

abstract class TransportContext extends Closable

Exposes a way to control the transport, and read off properties from the transport.

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Instance Constructors

  1. new TransportContext()

Abstract Value Members

  1. abstract def close(deadline: Time): Future[Unit]
    Definition Classes
    Closable
  2. abstract def localAddress: SocketAddress

    The locally bound address of this transport.

  3. abstract def onClose: Future[Throwable]

    The channel closed with the given exception.

    The channel closed with the given exception. This is the same exception you would get if attempting to read or write on the Transport, but this allows clients to listen to close events.

  4. abstract def peerCertificate: Option[Certificate]

    The peer certificate if a TLS session is established.

  5. abstract def remoteAddress: SocketAddress

    The remote address to which the transport is connected.

  6. abstract def status: Status

    The status of this transport; see com.twitter.finagle.Status for status definitions.

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  1. final def !=(arg0: Any): Boolean
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  7. final def close(): Future[Unit]
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