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 http
    Definition Classes
    finagle
  • package collection
    Definition Classes
    http
  • RecordSchema

final class RecordSchema extends AnyRef

RecordSchema represents the declaration of a heterogeneous Record type, with Fields that are determined at runtime. A Field declares the static type of its associated values, so although the record itself is dynamic, field access is type-safe.

Given a RecordSchema declaration schema, any number of Records of that schema can be obtained with schema.newRecord. The type that Scala assigns to this value is what Scala calls a "path-dependent type," meaning that schema1.Record and schema2.Record name distinct types. The same is true of fields: schema1.Field[A] and schema2.Field[A] are distinct, and can only be used with the corresponding Record.

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  1. RecordSchema
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Visibility
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  2. Protected

Instance Constructors

  1. new RecordSchema()

Type Members

  1. sealed trait Field[A] extends AnyRef

    Field is a handle used to access some corresponding value in a Record.

    Field is a handle used to access some corresponding value in a Record. A field may also declare a default, which is computed for each record it is associated with, at most once per record instance.

  2. final class Record extends AnyRef

    Record is an instance of a RecordSchema declaration.

    Record is an instance of a RecordSchema declaration. Records are mutable; the update method assigns or reassigns a value to a given field. If the user requires that a field's assigned value is never reassigned later, the user can lock that field.

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. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  9. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def newField[A](defaultSupplier: => A): Field[A]

    Creates a new Field with the given defaultSupplier, to be used only with Records from this schema.

    Creates a new Field with the given defaultSupplier, to be used only with Records from this schema.

    defaultSupplier

    a computation producing the default value to use, when there is no value previously assigned to this field in a given record.

    returns

    a Field with the given defaultSupplier

  14. def newField[A](): Field[A]

    Creates a new Field with no default value, to be used only with Records from this schema.

    Creates a new Field with no default value, to be used only with Records from this schema.

    returns

    a Field with no default value

  15. def newRecord(): Record

    Creates a new Record from this Schema.

    Creates a new Record from this Schema.

    returns

    a new Record

  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from AnyRef

Inherited from Any

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