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 zipkin
    Definition Classes
    finagle
  • package thrift
    Definition Classes
    zipkin
  • ScribeRawZipkinTracer
  • ScribeZipkinTracer
  • ZipkinTracer
o

com.twitter.finagle.zipkin.thrift

ScribeRawZipkinTracer

object ScribeRawZipkinTracer

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  4. def apply(client: FutureIface, statsReceiver: StatsReceiver, timer: Timer): ScribeRawZipkinTracer

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to Zipkin via scribe.

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to Zipkin via scribe.

    client

    The scribe client used to send traces to scribe

    statsReceiver

    Where to log information about tracing success/failures

    timer

    A Timer used for timing out spans in the DeadlineSpanMap

  5. def apply(scribeHost: String = "localhost", scribePort: Int = 1463, statsReceiver: StatsReceiver = NullStatsReceiver, timer: Timer = DefaultTimer): ScribeRawZipkinTracer

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to Zipkin via scribe.

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to Zipkin via scribe.

    scribeHost

    Host to send trace data to

    scribePort

    Port to send trace data to

    statsReceiver

    Where to log information about tracing success/failures

    timer

    A Timer used for timing out spans in the DeadlineSpanMap

  6. def apply(client: FutureIface, scribeCategory: String, statsReceiver: StatsReceiver, timer: Timer): ScribeRawZipkinTracer

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    client

    The scribe client used to send traces to scribe

    scribeCategory

    Category under which the trace data should be scribed

    statsReceiver

    Where to log information about tracing success/failures

    timer

    A Timer used for timing out spans in the DeadlineSpanMap

  7. def apply(scribeHost: String, scribePort: Int, scribeCategory: String, statsReceiver: StatsReceiver, timer: Timer): ScribeRawZipkinTracer

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    scribeHost

    Host to send trace data to

    scribePort

    Port to send trace data to

    scribeCategory

    Category under which the trace data should be scribed

    statsReceiver

    Where to log information about tracing success/failures

    timer

    A Timer used for timing out spans in the DeadlineSpanMap

  8. def apply(scribeHost: String, scribePort: Int, scribeCategory: String, statsReceiver: StatsReceiver, timer: Timer, clientName: String): ScribeRawZipkinTracer

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    Creates a com.twitter.finagle.tracing.Tracer that sends traces to scribe with the specified scribeCategory.

    scribeHost

    Host to send trace data to

    scribePort

    Port to send trace data to

    scribeCategory

    Category under which the trace data should be scribed

    statsReceiver

    Where to log information about tracing success/failures

    clientName

    Name of the scribe finagle client

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  21. def toString(): String
    Definition Classes
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  22. val tracerCache: TracerCache[ScribeRawZipkinTracer]
  23. final def wait(): Unit
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