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 serverset2
    Definition Classes
    finagle
  • package client
    Definition Classes
    serverset2
  • NullZooKeeperClient
  • NullZooKeeperMulti
  • NullZooKeeperRW
  • NullZooKeeperRWMulti
  • NullZooKeeperReader
  • NullZooKeeperWriter
  • SessionStats
  • StateTracker
  • ZooKeeperReader

trait NullZooKeeperReader extends ZooKeeperReader with NullZooKeeperClient

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Inherited
  1. NullZooKeeperReader
  2. NullZooKeeperClient
  3. ZooKeeperReader
  4. ZooKeeperClient
  5. Closable
  6. AnyRef
  7. Any
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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. def addAuthInfo(scheme: String, auth: Buf): Future[Unit]

    Add the specified scheme: auth information to this connection.

    Add the specified scheme: auth information to this connection.

    scheme

    the authentication scheme to use.

    auth

    the authentication credentials.

    returns

    a Future[Unit]

    Definition Classes
    NullZooKeeperClient → ZooKeeperClient
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. def close(deadline: Time): Future[Unit]
    Definition Classes
    NullZooKeeperClient → Closable
  8. def close(after: Duration): Future[Unit]
    Definition Classes
    Closable
  9. final def close(): Future[Unit]
    Definition Classes
    Closable
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  12. def exists(path: String): Future[Option[Stat]]

    Check if a node exists.

    Check if a node exists.

    path

    the path of the node to check.

    returns

    a Future[Option[Data.Stat] containing Some[Stat] if the node exists, or None if the node does not exist.

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  13. def existsWatch(path: String): Future[Watched[Option[Stat]]]

    A version of exists that sets a watch and returns a Future[Watched[Option[Data.Stat]]]

    A version of exists that sets a watch and returns a Future[Watched[Option[Data.Stat]]]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  14. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  15. def getACL(path: String): Future[ACL]

    Get the ACL of the node of the given path.

    Get the ACL of the node of the given path.

    path

    the path of the node to read.

    returns

    a Future[Node.ACL]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  16. def getChildren(path: String): Future[Children]

    For a node at a given path return its stat and a list of children.

    For a node at a given path return its stat and a list of children.

    path

    the path of the node to read.

    returns

    a Future[Node.Children]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  17. def getChildrenWatch(path: String): Future[Watched[Children]]

    A version of getChildren that sets and returns a Future[Watched[Node.Children]]

    A version of getChildren that sets and returns a Future[Watched[Node.Children]]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  18. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  19. def getData(path: String): Future[Node.Data]

    Return the data of the node of the given path.

    Return the data of the node of the given path.

    path

    the path of the node to read.

    returns

    a Future[Node.Data]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  20. def getDataWatch(path: String): Future[Watched[Node.Data]]

    A version of getData that sets a watch and returns a Future[Watched[Node.Data]]

    A version of getData that sets a watch and returns a Future[Watched[Node.Data]]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  21. def getEphemerals(): Future[Seq[String]]

    Get the existing ephemeral nodes created with the current session ID.

    Get the existing ephemeral nodes created with the current session ID.

    NOTE: This method is not universally implemented. The Future will fail with KeeperException.Unimplemented if this is the case.

    returns

    a Future[Seq[String]] of ephemeral node paths.

    Definition Classes
    NullZooKeeperClient → ZooKeeperClient
  22. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  23. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  24. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  25. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  26. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  27. def sessionId: Long

    The session id for this ZooKeeper client instance.

    The session id for this ZooKeeper client instance. The value returned is not valid until the client connects to a server and may change after a re-connect.

    returns

    current session id

    Definition Classes
    NullZooKeeperClient → ZooKeeperClient
  28. def sessionPasswd: Buf

    The session password for this ZooKeeper client instance.

    The session password for this ZooKeeper client instance. The value returned is not valid until the client connects to a server and may change after a re-connect.

    returns

    current session password

    Definition Classes
    NullZooKeeperClient → ZooKeeperClient
  29. def sessionTimeout: Duration

    The negotiated session timeout for this ZooKeeper client instance.

    The negotiated session timeout for this ZooKeeper client instance. The value returned is not valid until the client connects to a server and may change after a re-connect.

    returns

    current session timeout

    Definition Classes
    NullZooKeeperClient → ZooKeeperClient
  30. def sync(path: String): Future[Unit]

    Sync.

    Sync. Flushes channel between process and leader.

    path

    the path of the node to sync.

    returns

    a Future[Unit]

    Definition Classes
    NullZooKeeperReader → ZooKeeperReader
  31. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  32. def toString(): String
    Definition Classes
    AnyRef → Any
  33. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  34. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  35. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from NullZooKeeperClient

Inherited from ZooKeeperReader

Inherited from ZooKeeperClient

Inherited from Closable

Inherited from AnyRef

Inherited from Any

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