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

trait Transport[In, Out] extends Closable

A transport is a representation of a stream of objects that may be read from and written to asynchronously. Transports are connected to some endpoint, typically via a channel pipeline that performs encoding and decoding.

Self Type
Transport[In, Out]
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Type Members

  1. abstract type Context <: TransportContext

Abstract Value Members

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

    The control panel for the Transport.

  3. abstract def read(): Future[Out]

    Read a message from the transport.

  4. abstract def write(req: In): Future[Unit]

    Write req to this transport; the returned future acknowledges write completion.

  5. abstract def localAddress: SocketAddress

    The locally bound address of this transport.

    The locally bound address of this transport.

    Annotations
    @deprecated
    Deprecated

    (Since version 2017-08-21) Please use Transport.context.localAddress instead

  6. 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.

    Annotations
    @deprecated
    Deprecated

    (Since version 2017-08-21) Please use Transport.context.onClose instead

  7. abstract def peerCertificate: Option[Certificate]

    The peer certificate if a TLS session is established.

    The peer certificate if a TLS session is established.

    Annotations
    @deprecated
    Deprecated

    (Since version 2017-08-21) Please use Transport.context.peerCertificate instead

  8. abstract def remoteAddress: SocketAddress

    The remote address to which the transport is connected.

    The remote address to which the transport is connected.

    Annotations
    @deprecated
    Deprecated

    (Since version 2017-08-21) Please use Transport.context.remoteAddress instead

  9. abstract def status: Status

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

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

    Annotations
    @deprecated
    Deprecated

    (Since version 2017-08-21) Please use Transport.context.status instead

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  6. def close(after: Duration): Future[Unit]
    Definition Classes
    Closable
  7. final def close(): Future[Unit]
    Definition Classes
    Closable
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. def map[In1, Out1](f: (In1) ⇒ In, g: (Out) ⇒ Out1): Transport[In1, Out1]

    Maps this transport to Transport[In1, Out2].

    Maps this transport to Transport[In1, Out2]. Note, exceptions in f and g are lifted to a com.twitter.util.Future.

    f

    The function applied to writes input.

    g

    The function applied to the result of a read

  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from Closable

Inherited from AnyRef

Inherited from Any

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