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 http
    Definition Classes
    finagle
  • package filter
    Definition Classes
    http
  • object DtabFilter
    Definition Classes
    filter
  • Extractor
  • Injector

class Extractor extends DtabFilter[Request, Response]

Extracts Dtab-local headers from incoming requests and adds the Dtab to the local context.

Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Extractor
  2. DtabFilter
  3. SimpleFilter
  4. Filter
  5. Function2
  6. AnyRef
  7. Any
  1. Hide All
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Extractor()

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. def agnosticAndThen(next: TypeAgnostic): Filter[Request, Response, Request, Response]

    Convert the Filter.TypeAgnostic filter to a Filter and chain it with andThen.

    Convert the Filter.TypeAgnostic filter to a Filter and chain it with andThen.

    Definition Classes
    Filter
  5. def andThen(factory: ServiceFactory[Request, Response]): ServiceFactory[Request, Response]

    Terminates a filter chain in a ServiceFactory.

    Terminates a filter chain in a ServiceFactory. For example,

    myFilter.andThen(myServiceFactory)
    factory

    a service factory that takes the output request type and the input response type.

    Definition Classes
    Filter
  6. def andThen(service: Service[Request, Response]): Service[Request, Response]

    Terminates a filter chain in a Service.

    Terminates a filter chain in a Service. For example,

    myFilter.andThen(myService)
    service

    a service that takes the output request type and the input response type.

    Definition Classes
    Filter
  7. def andThen[Req2, Rep2](next: Filter[Request, Response, Req2, Rep2]): Filter[Request, Response, Req2, Rep2]

    Chains a series of filters together:

    Chains a series of filters together:

    myModularService = handleExceptions.andThen(thrift2Pojo.andThen(parseString))
    next

    another filter to follow after this one

    Definition Classes
    Filter
    Note

    synchronously thrown exceptions in the underlying service are automatically lifted into Future.exception.

  8. def andThenIf[Req2 >: Request, Rep2 <: Response](condAndFilter: (Boolean, Filter[Request, Response, Req2, Rep2])): Filter[Request, Response, Req2, Rep2]

    Conditionally propagates requests down the filter chain.

    Conditionally propagates requests down the filter chain. This may useful if you are statically wiring together filter chains based on a configuration file, for instance.

    condAndFilter

    a tuple of boolean and filter.

    Definition Classes
    Filter
  9. def apply(req: Request, service: Service[Request, Response]): Future[Response]

    This is the method to override/implement to create your own Filter.

    This is the method to override/implement to create your own Filter.

    service

    a service that takes the output request type and the input response type

    Definition Classes
    DtabFilterFilter → Function2
  10. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  11. def clear(req: Request): Unit
    Attributes
    protected[this]
    Definition Classes
    DtabFilter
  12. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  13. def curried: (Request) ⇒ (Service[Request, Response]) ⇒ Future[Response]
    Definition Classes
    Function2
    Annotations
    @unspecialized()
  14. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  16. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  17. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  18. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  21. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  22. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  23. def read(req: Request): Try[Dtab]
    Attributes
    protected[this]
    Definition Classes
    DtabFilter
  24. def respondToInvalid(req: Request, msg: String): Future[Response]
    Definition Classes
    ExtractorDtabFilter
  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  26. def toString(): String
    Definition Classes
    Function2 → AnyRef → Any
  27. def tupled: ((Request, Service[Request, Response])) ⇒ Future[Response]
    Definition Classes
    Function2
    Annotations
    @unspecialized()
  28. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )

Inherited from DtabFilter[Request, Response]

Inherited from SimpleFilter[Request, Response]

Inherited from Filter[Request, Response, Request, Response]

Inherited from (Request, Service[Request, Response]) ⇒ Future[Response]

Inherited from AnyRef

Inherited from Any

Ungrouped