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

object NullZooKeeperRW extends NullZooKeeperRW

Linear Supertypes
NullZooKeeperRW, NullZooKeeperWriter, NullZooKeeperReader, NullZooKeeperClient, ZooKeeperRW, ZooKeeperWriter, ZooKeeperReader, ZooKeeperClient, Closable, AnyRef, Any
Ordering
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Inherited
  1. NullZooKeeperRW
  2. NullZooKeeperRW
  3. NullZooKeeperWriter
  4. NullZooKeeperReader
  5. NullZooKeeperClient
  6. ZooKeeperRW
  7. ZooKeeperWriter
  8. ZooKeeperReader
  9. ZooKeeperClient
  10. Closable
  11. AnyRef
  12. Any
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Visibility
  1. Public
  2. Protected

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. def create(path: String, data: Option[Buf], acl: Seq[ACL], createMode: CreateMode): Future[String]

    Create a node of a given type with the given path.

    Create a node of a given type with the given path. The node data will be the given data, and node acl will be the given acl.

    path

    the path for the node.

    data

    the initial data for the node.

    acl

    a sequence of ACLs for the node.

    createMode

    specifies what type of node to create.

    returns

    a Future[String] containing the actual path of the created node.

    Definition Classes
    NullZooKeeperWriter → ZooKeeperWriter
  11. def delete(path: String, version: Option[Int]): Future[Unit]

    Delete the node with the given path.

    Delete the node with the given path. The call will succeed if such a node exists, and the given version matches the node's version (if the given version is None, it matches any node's versions).

    This operation, if successful, will trigger all the watches on the node of the given path left by existsWatch API calls, and the watches on the parent node left by getChildrenWatch API calls.

    path

    the path of the node to be deleted.

    version

    the expected node version.

    returns

    a Future[Unit]

    Definition Classes
    NullZooKeeperWriter → ZooKeeperWriter
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  14. 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
  15. 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
  16. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  17. 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
  18. 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
  19. 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
  20. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  21. 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
  22. 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
  23. 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
  24. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  25. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  26. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  27. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  28. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  29. 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
  30. 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
  31. 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
  32. def setACL(path: String, acl: Seq[ACL], version: Option[Int]): Future[Stat]

    Set the ACL for the node of the given path if such a node exists and the given version matches the version of the node (if the given version is None, it matches any node's versions)

    Set the ACL for the node of the given path if such a node exists and the given version matches the version of the node (if the given version is None, it matches any node's versions)

    path

    the path of the node to write.

    acl

    a list of Data.ACL to apply to the node.

    version

    the expected matching version.

    returns

    a Future[Data.Stat]

    Definition Classes
    NullZooKeeperWriter → ZooKeeperWriter
  33. def setData(path: String, data: Option[Buf], version: Option[Int]): Future[Stat]

    Set the data for the node of the given path if such a node exists and the given version matches the version of the node (if the given version is None, it matches any node's versions).

    Set the data for the node of the given path if such a node exists and the given version matches the version of the node (if the given version is None, it matches any node's versions).

    This operation, if successful, will trigger all the watches on the node of the given path left by getDataWatch calls.

    path

    the path of the node to write.

    data

    the data to set.

    version

    the expected matching version.

    returns

    a Future[Data.Stat]

    Definition Classes
    NullZooKeeperWriter → ZooKeeperWriter
  34. 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
  35. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  36. def toString(): String
    Definition Classes
    AnyRef → Any
  37. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  38. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  39. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from NullZooKeeperRW

Inherited from NullZooKeeperWriter

Inherited from NullZooKeeperReader

Inherited from NullZooKeeperClient

Inherited from ZooKeeperRW

Inherited from ZooKeeperWriter

Inherited from ZooKeeperReader

Inherited from ZooKeeperClient

Inherited from Closable

Inherited from AnyRef

Inherited from Any

Ungrouped