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 context
    Definition Classes
    finagle
  • final class MarshalledContext extends Context

    A marshalled context contains bindings that may be marshalled and sent across process boundaries.

    A marshalled context contains bindings that may be marshalled and sent across process boundaries. A set of marshalled bindings may be restored in the local environment. Thus we can use marshalled contexts to propagate a set of bindings across a whole request tree.

    Definition Classes
    context
  • Key
  • KeyValuePair

abstract class Key[A] extends AnyRef

Keys in MarshalledContext must provide a marshaller and unmarshaller. The key id is used for marshalling and unmarshalling and thus must be unique. The behavior of the MarshalledContext when using two keys with the same key id is undefined.

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Instance Constructors

  1. new Key(id: String)

Abstract Value Members

  1. abstract def marshal(value: A): Buf

    Marshal an A-typed value into a Buf.

  2. abstract def tryUnmarshal(buf: Buf): Try[A]

    Attempt to unmarshal an A-typed context value.

Concrete Value Members

  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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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    @native() @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  7. def equals(arg0: Any): Boolean
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_]
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    @native()
  10. def hashCode(): Int
    Definition Classes
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    @native()
  11. val id: String
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. final val marshalId: Buf

    A unique identifier defining this marshaller.

    A unique identifier defining this marshaller. This is transmitted together with marshalled values in order to pick the the appropriate unmarshaller for a given value.

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