Packages

  • package root
    Definition Classes
    root
  • package com

    Start with com.twitter.finagle.

    Start with com.twitter.finagle.

    Definition Classes
    root
  • package twitter

    Start with com.twitter.finagle.

    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
  • Context
  • Contexts
  • Deadline
  • LocalContext
  • MarshalledContext
  • RemoteInfo

class LocalContext extends Context

A type of context that is local to the process. The type of Key is also unique (generative) to each instance of this context, so that keys cannot be used across different instances of this context type.

Linear Supertypes
Context, AnyRef, Any
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Inherited
  1. LocalContext
  2. Context
  3. AnyRef
  4. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new LocalContext()

Type Members

  1. case class Bound [A](next: Env, key: Key[A], value: A) extends Env with Product with Serializable

    An environment with key bound to value; lookups for other keys are forwarded to next.

    An environment with key bound to value; lookups for other keys are forwarded to next.

    Definition Classes
    Context
  2. case class Cleared [A](next: Env, key: Key[A]) extends Env with Product with Serializable

    An environment without key.

    An environment without key. Lookups for other keys are forwarded to next.

    Definition Classes
    Context
  3. sealed trait Env extends AnyRef
    Definition Classes
    Context
  4. case class OrElse (left: Env, right: Env) extends Env with Product with Serializable

    Concatenate two environments with left-hand side precedence.

    Concatenate two environments with left-hand side precedence.

    Definition Classes
    Context
  5. class Key [A] extends AnyRef

Value Members

  1. object Empty extends Env

    An empty environment.

    An empty environment. No keys are present.

    Definition Classes
    Context
  2. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  3. final def ##(): Int
    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. def apply[A](key: Key[A]): A

    Retrieve the current definition of a key.

    Retrieve the current definition of a key.

    Definition Classes
    Context
    Annotations
    @throws( "If the key does not exist" )
    Exceptions thrown

    NoSuchElementException when the key is undefined in the current request-local context.

  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  8. def contains[A](key: Key[A]): Boolean

    Tells whether key is defined in the current request-local context.

    Tells whether key is defined in the current request-local context.

    Definition Classes
    Context
  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
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. def get[A](key: Key[A]): Option[A]

    Retrieve the current definition of a key, but only if it is defined in the current request-local context.

    Retrieve the current definition of a key, but only if it is defined in the current request-local context.

    Definition Classes
    Context
  13. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  14. def getOrElse[A](key: Key[A], orElse: () ⇒ A): A

    Retrieve the current definition of a key if it is defined.

    Retrieve the current definition of a key if it is defined. If it is not defined, orElse is evaluated and returned.

    Definition Classes
    Context
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. def let[A, B, R](key1: Key[A], value1: A, key2: Key[B], value2: B)(fn: ⇒ R): R

    Bind two keys and values in the scope of fn.

    Bind two keys and values in the scope of fn.

    Definition Classes
    Context
  18. def let[A, R](key: Key[A], value: A)(fn: ⇒ R): R

    Bind value to key in the scope of fn.

    Bind value to key in the scope of fn.

    Definition Classes
    Context
  19. def letClear[R]()(fn: ⇒ R): R

    Clears all bindings in the scope of fn.

    Clears all bindings in the scope of fn.

    For example:

    context.let(Key1, "value1") {
  context.let(Key2, "something else") {
    context.letClear() {
      // context.contains(Key1) == false
      // context.contains(Key2) == false
    }
    // context(Key1) == "value1"
    // context(Key2) == "something else"
  }
}
    Definition Classes
    Context
  20. def letClear[R](keys: Key[_]*)(fn: ⇒ R): R

    Unbind the passed-in keys, in the scope of fn.

    Unbind the passed-in keys, in the scope of fn.

    Definition Classes
    Context
  21. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  22. def newKey[A](): Key[A]

    A java-friendly key constructor.

  23. final def notify(): Unit
    Definition Classes
    AnyRef
  24. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  26. def toString(): String
    Definition Classes
    AnyRef → Any
  27. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Context

Inherited from AnyRef

Inherited from Any

Ungrouped