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 liveness
    Definition Classes
    finagle
  • FailureAccrualFactory
  • FailureAccrualPolicy
  • FailureDetector
  • FailureDetectors
  • sessionFailureDetector

object FailureAccrualFactory

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Type Members

  1. sealed trait Param extends AnyRef

    An ADT representing a FailureAccrualFactorys Stack.Param, which is one of the following:

    An ADT representing a FailureAccrualFactorys Stack.Param, which is one of the following:

    1. Param.Configured - configures failure accrual 2. Param.Replaced - replaces the standard implementation with the given one 3. Param.Disabled - completely disables this role in the underlying stack

  2. sealed trait State extends AnyRef
    Attributes
    protected[com.twitter.finagle]

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 Param(failureAccrualPolicy: () ⇒ FailureAccrualPolicy): Param

    Configures the FailureAccrualFactory.

    Configures the FailureAccrualFactory.

    failureAccrualPolicy

    The policy to use to determine when to mark an endpoint as dead.

    See also

    The user guide for more details.

  5. def Param(numFailures: Int, markDeadFor: Duration): Param

    Configures the FailureAccrualFactory.

    Configures the FailureAccrualFactory.

    numFailures

    The number of consecutive failures before marking an endpoint as dead.

    markDeadFor

    The duration to mark an endpoint as dead.

    See also

    The user guide for more details.

  6. def Param(numFailures: Int, markDeadFor: () ⇒ Duration): Param

    Configures the FailureAccrualFactory.

    Configures the FailureAccrualFactory.

    Note there is a Java-friendly method in the API that takes Duration as a value, not a function.

    numFailures

    The number of consecutive failures before marking an endpoint as dead.

    markDeadFor

    The duration to mark an endpoint as dead.

    See also

    The user guide for more details.

  7. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  8. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  9. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  11. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
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    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  14. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  15. def module[Req, Rep]: Stackable[ServiceFactory[Req, Rep]]

    Creates a com.twitter.finagle.Stackable com.twitter.finagle.liveness.FailureAccrualFactory.

  16. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  17. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  19. def perturb(markDeadFor: Duration, perturbation: Float = 0.1f, rand: Random = rng): () ⇒ Duration

    Add jitter in markDeadFor to reduce correlation.

    Add jitter in markDeadFor to reduce correlation. Return a () => Duration type that can be used in Param.

  20. val role: Role
  21. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  22. def toString(): String
    Definition Classes
    AnyRef → Any
  23. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  24. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  25. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  26. object Alive extends State
    Attributes
    protected[com.twitter.finagle]
  27. object Dead extends State
    Attributes
    protected[com.twitter.finagle]
  28. object ProbeClosed extends State
    Attributes
    protected[com.twitter.finagle]
  29. object ProbeOpen extends State
    Attributes
    protected[com.twitter.finagle]

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