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 http2
    Definition Classes
    finagle
  • package param
    Definition Classes
    http2
  • package transport
    Definition Classes
    http2
  • ClientDiscardedRequestException
  • StripHeadersHandler

package transport

Ordering
  1. Alphabetic
Visibility
  1. Public
  2. All

Type Members

  1. class ClientDiscardedRequestException extends Exception with FailureFlags[ClientDiscardedRequestException] with HasLogLevel

Value Members

  1. object StripHeadersHandler extends ChannelDuplexHandler

    Netty uses a blacklist containing common connection-related headers that should be removed from h2 messages.

    Netty uses a blacklist containing common connection-related headers that should be removed from h2 messages. However, a few cases need to be handled separately: 1) All headers mentioned in the "connection" header must be stripped 2) The "TE" header can exist iff its value is "trailers" See https://tools.ietf.org/html/rfc7540#section-8.1.2.2 3) The "http2-settings" headers is left on the server side, but we probably don't need it anymore.

    Annotations
    @Sharable()

Ungrouped