Packages

  • package root
    Definition Classes
    root
  • package com
    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 thrift

    Please use the new interface, com.twitter.finagle.Thrift, for constructing Thrift clients and servers.

    Deprecation

    Please use the new interface, com.twitter.finagle.Thrift, for constructing Thrift clients and servers.

    Thrift codecs

    We provide client and server protocol support for the framed protocol. The public implementations are defined on the Thrift object:

    The type of the server codec is Service[Array[Byte], Array[Byte]] and the client codecs are Service[ThriftClientRequest, Array[Byte]]. The service provided is that of a "transport" of thrift messages (requests and replies) according to the protocol chosen. This is why the client codecs need to have access to a thrift ProtocolFactory.

    These transports are used by the services produced by the finagle thrift codegenerator.

    val service: Service[ThriftClientRequest, Array[Byte]] = ClientBuilder()
  .hosts("foobar.com:123")
  .stack(Thrift.client)
  .build()

// Wrap the raw Thrift transport in a Client decorator. The client
// provides a convenient procedural interface for accessing the Thrift
// server.
val client = new Hello.ServiceToClient(service, protocolFactory)

    In this example, Hello is the thrift interface, and the inner class ServiceToClient is provided by the finagle thrift code generator.

    Definition Classes
    finagle
  • package thriftscala
    Definition Classes
    thrift
  • Annotation
  • AnnotationType
  • BinaryAnnotation
  • ClientId
  • ConnectionOptions
  • Constants
  • Delegation
  • Endpoint
  • RequestContext
  • RequestHeader
  • ResponseHeader
  • Span
  • UpgradeReply

object BinaryAnnotation extends ValidatingThriftStructCodec3[BinaryAnnotation] with Serializable

Binary annotations are tags applied to a Span to give it context. For example, a binary annotation of "http.uri" could the path to a resource in a RPC call.

Binary annotations of type STRING are always queryable, though more a historical implementation detail than a structural concern.

Binary annotations can repeat, and vary on the host. Similar to Annotation, the host indicates who logged the event. This allows you to tell the difference between the client and server side of the same key. For example, the key "http.uri" might be different on the client and server side due to rewriting, like "/api/v1/myresource" vs "/myresource. Via the host field, you can see the different points of view, which often help in debugging.

Linear Supertypes
Serializable, Serializable, ValidatingThriftStructCodec3[BinaryAnnotation], ThriftStructCodec3[BinaryAnnotation], ThriftStructCodec[BinaryAnnotation], AnyRef, Any
Ordering
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  2. By Inheritance
Inherited
  1. BinaryAnnotation
  2. Serializable
  3. Serializable
  4. ValidatingThriftStructCodec3
  5. ThriftStructCodec3
  6. ThriftStructCodec
  7. AnyRef
  8. Any
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Visibility
  1. Public
  2. All

Type Members

  1. class Immutable extends BinaryAnnotation

    The default read-only implementation of BinaryAnnotation.

    The default read-only implementation of BinaryAnnotation. You typically should not need to directly reference this class; instead, use the BinaryAnnotation.apply method to construct new instances.

  2. trait Proxy extends BinaryAnnotation

    This Proxy trait allows you to extend the BinaryAnnotation trait with additional state or behavior and implement the read-only methods from BinaryAnnotation using an underlying instance.

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. val AnnotationTypeField: TField
  5. val AnnotationTypeFieldI32: TField
  6. val AnnotationTypeFieldManifest: Manifest[AnnotationType]
  7. val HostField: TField
  8. val HostFieldManifest: Manifest[Endpoint]
  9. val KeyField: TField
  10. val KeyFieldManifest: Manifest[String]
  11. val NoPassthroughFields: Map[Short, TFieldBlob]
  12. val Struct: TStruct
  13. val ValueField: TField
  14. val ValueFieldManifest: Manifest[ByteBuffer]
  15. def apply(key: String, value: ByteBuffer, annotationType: AnnotationType, host: Option[Endpoint] = _root_.scala.None): BinaryAnnotation
  16. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  17. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  18. def decode(_iprot: TProtocol): BinaryAnnotation
    Definition Classes
    BinaryAnnotation → ThriftStructCodec
  19. def encode(_item: BinaryAnnotation, _oproto: TProtocol): Unit
    Definition Classes
    BinaryAnnotation → ThriftStructCodec
  20. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  21. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  22. lazy val fieldInfos: List[ThriftStructFieldInfo]

    Field information in declaration order.

  23. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  24. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  25. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  26. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  27. lazy val metaData: ThriftStructMetaData[BinaryAnnotation]
    Definition Classes
    ThriftStructCodec
  28. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  29. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  30. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  31. lazy val structAnnotations: Map[String, String]
  32. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  33. def toString(): String
    Definition Classes
    AnyRef → Any
  34. def ttypeToString(byte: Byte): String
    Attributes
    protected
    Definition Classes
    ThriftStructCodec3
  35. def unapply(_item: BinaryAnnotation): Option[(String, ByteBuffer, AnnotationType, Option[Endpoint])]
  36. def validate(_item: BinaryAnnotation): Unit

    Checks that all required fields are non-null.

  37. final def validateField[U <: ValidatingThriftStruct[U]](any: Any): Seq[Issue]
    Attributes
    protected
    Definition Classes
    ValidatingThriftStructCodec3
  38. def validateNewInstance(item: BinaryAnnotation): Seq[Issue]

    Checks that the struct is a valid as a new instance.

    Checks that the struct is a valid as a new instance. If there are any missing required or construction required fields, return a non-empty list.

    Definition Classes
    BinaryAnnotation → ValidatingThriftStructCodec3
  39. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  40. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  41. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  42. def withoutPassthroughFields(original: BinaryAnnotation): BinaryAnnotation
  43. object Immutable extends ThriftStructCodec3[BinaryAnnotation] with Serializable

Inherited from Serializable

Inherited from Serializable

Inherited from ValidatingThriftStructCodec3[BinaryAnnotation]

Inherited from ThriftStructCodec3[BinaryAnnotation]

Inherited from ThriftStructCodec[BinaryAnnotation]

Inherited from AnyRef

Inherited from Any

Ungrouped