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

    Start with com.twitter.finagle.

    Definition Classes
  • 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] =
    val server = Http.server.serve(":8080", service)

    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
  • package redis
    Definition Classes
  • package exp
    Definition Classes
  • Channel
  • ConnectionInitCommand
  • Pattern
  • RedisPool
  • SubscribeCommands
  • SubscribeDispatcher
  • SubscribeHandler
  • SubscriptionType
  • package param
    Definition Classes
  • package protocol
    Definition Classes
  • package util
    Definition Classes

package exp

  1. Alphabetic
  1. Public
  2. Protected

Type Members

  1. class RedisPool extends ServiceFactory[Command, Reply]
  2. trait SubscribeCommands extends AnyRef

    SubscribeClient is used to (un)subscribe messages from redis' PUB/SUB subsystem.

    SubscribeClient is used to (un)subscribe messages from redis' PUB/SUB subsystem. Once a client enters PUB/SUB state by subscribing to some channel/pattern, it should not issue any other commands, except the (un)subscribe commands, until it exits from the PUB/SUB state, by unsubscribing from all the channels and patterns. For this reason, we put the (un)subscribe commands here, separately from the other ordinary commands.

  3. class SubscribeDispatcher extends GenSerialClientDispatcher[Command, Reply, Command, Reply]
  4. sealed trait SubscribeHandler extends AnyRef
  5. sealed trait SubscriptionType[Message] extends AnyRef

Value Members

  1. case object Channel extends SubscriptionType[(Buf, Buf)] with Product with Serializable
  2. object ConnectionInitCommand

    A stack module that executes commands when it creates a new connection.

  3. case object Pattern extends SubscriptionType[(Buf, Buf, Buf)] with Product with Serializable
  4. object RedisPool
  5. object SubscribeCommands