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.

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 addr

Definition Classes: finagle

package builder

Definition Classes: finagle

package client

Definition Classes: finagle

package context

Definition Classes: finagle

package core

Definition Classes: finagle

package dispatch

Definition Classes: finagle

package exp

Package exp contains experimental code.

Package exp contains experimental code. This can be removed or stabilized (moved elsewhere) at any time.

Definition Classes: finagle

package factory

Definition Classes: finagle

package filter

Definition Classes: finagle

package liveness

Definition Classes: finagle

package loadbalancer

This package implements client side load balancing algorithms.

As an end-user, see the Balancers API to create instances which can be used to configure a Finagle client with various load balancing strategies.

As an implementor, each algorithm gets its own subdirectory and is exposed via the Balancers object. Several convenient traits are provided which factor out common behavior and can be mixed in (i.e. Balancer, DistributorT, NodeT, and Updating).

Definition Classes: finagle

package namer

Definition Classes: finagle

package naming

Definition Classes: finagle

package offload

Definition Classes: finagle

package param

Defines common com.twitter.finagle.Stack.Param's shared between finagle clients and servers.

Definition Classes: finagle

package pool

Definition Classes: finagle

package pushsession

Definition Classes: finagle

package server

Definition Classes: finagle

package service

Definition Classes: finagle

package ssl

Definition Classes: finagle

package stats

Definition Classes: finagle

package thrift

Definition Classes: finagle

package tracing

Definition Classes: finagle

package transport

Definition Classes: finagle

package util

Definition Classes: finagle

AbstractFailureFlags

AbstractNamer

AbstractResolver

Addr

Address

Addresses

Addrs

Announcement

Announcer

AnnouncerForumInvalid

AnnouncerNotFoundException

ApiException

Backoff

CanStackFrom

CancelledConnectionException

CancelledRequestException

ChannelBufferUsageException

ChannelClosedException

ChannelException

ChannelWriteException

Client

ClientConnection

ClientParamsInjector

ConnectionFailedException

ConnectionRefusedException

Dentry

DroppedWriteException

Dtab

DtabBuilder

DtabFlags

FactoryToService

FailResolver

FailedFastException

Failure

FailureFlags

Filter

FixedInetResolver

GlobalRequestTimeoutException

HasRemoteInfo

InconsistentStateException

IndividualRequestTimeoutException

InetResolver

JavaFailureFlags

ListeningServer

MultipleAnnouncersPerSchemeException

MultipleResolversPerSchemeException

Name

NameTree

Namer

Names

NegResolver

NilResolver

NoBrokersAvailableException

NotServableException

NullServer

Path

ProxyAnnouncement

ProxyConnectException

ReadTimedOutException

RefusedByRateLimiter

RequestException

RequestTimeoutException

Resolver

ResolverAddressInvalid

ResolverNotFoundException

Resolvers

Server

Service

ServiceClosedException

ServiceException

ServiceFactory

ServiceFactoryProxy

ServiceFactoryWrapper

ServiceNamer

ServiceNotAvailableException

ServiceProxy

ServiceReturnedToPoolException

ServiceTimeoutException

ShardNotAvailableException

SimpleFilter

SourcedException

SslException

SslVerificationFailedException

Stack

StackBuilder

StackParams

StackTransformer

StackTransformerCollection

Stackable

Stacks

Status

StreamClosedException

TimeoutException

TooManyConcurrentRequestsException

TooManyWaitersException

TransportException

UnknownChannelException

WriteException

WriteTimedOutException

stack

com.twitter.finagle

FixedInetResolver

object FixedInetResolver

InetResolver that caches all successful DNS lookups indefinitely and does not poll for updates.

Clients should only use this in scenarios where host -> IP map changes do not occur.

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val MaxRetries: Int
def apply(unscopedStatsReceiver: StatsReceiver, maxCacheSize: Long, backoffs: Backoff, timer: Timer): InetResolver
Uses a com.twitter.util.Future cache to memoize lookups.
Uses a com.twitter.util.Future cache to memoize lookups.
maxCacheSize
Specifies the maximum number of Futures that can be cached. No maximum size limit if Long.MaxValue.
backoffs
Optionally retry DNS resolution failures using this sequence of durations for backoff. Backoff.empty means don't retry.
def apply(unscopedStatsReceiver: StatsReceiver, maxCacheSize: Long): InetResolver
def apply(unscopedStatsReceiver: StatsReceiver): InetResolver
def apply(): InetResolver
final def asInstanceOf[T0]: T0

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val scheme: String
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Packages

FixedInetResolver

object FixedInetResolver

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FixedInetResolver 

object FixedInetResolver

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FixedInetResolver