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com.twitter.finagle.memcached

PoolingReadRepairClient

class PoolingReadRepairClient extends Client

This class is designed to support replicated memcached setups. It supports a limited subset of operations (just get, set, and delete).

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  1. PoolingReadRepairClient
  2. Client
  3. BaseClient
  4. Closable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new PoolingReadRepairClient(allClients: Seq[BaseClient[Buf]], readRepairProbability: Float, readRepairCount: Int = 1, futurePool: FuturePool = ...)

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 adapt[T](bijection: Bijection[Buf, T]): BaseClient[T]
    Definition Classes
    Client
  5. def add(key: String, flags: Int, expiry: Time, value: Buf): Nothing

    Store a key but only if it doesn't already exist on the server.

    Store a key but only if it doesn't already exist on the server.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    returns

    true if stored, false if not stored

    Definition Classes
    PoolingReadRepairClientBaseClient
  6. def add(key: String, value: Buf): Future[Boolean]

    Store a key but only if it doesn't already exist on the server.

    Store a key but only if it doesn't already exist on the server.

    Neither flags nor expiry are supplied.

    returns

    true if stored, false if not stored

    Definition Classes
    BaseClient
  7. def append(key: String, flags: Int, expiry: Time, value: Buf): Nothing

    Append bytes to the end of an existing key.

    Append bytes to the end of an existing key. If the key doesn't exist, the operation has no effect.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    returns

    true if stored, false if not stored

    Definition Classes
    PoolingReadRepairClientBaseClient
  8. def append(key: String, value: Buf): Future[Boolean]

    Append a set of bytes to the end of an existing key.

    Append a set of bytes to the end of an existing key. If the key doesn't exist, the operation has no effect.

    returns

    true if stored, false if not stored

    Definition Classes
    BaseClient
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def bufferToType(v: Buf): Buf

    Deserialize from the bytes in a Buf into the client's type, T.

    Deserialize from the bytes in a Buf into the client's type, T.

    Definition Classes
    ClientBaseClient
  11. def checkAndSet(key: String, flags: Int, expiry: Time, value: Buf, casUnique: Buf): Nothing

    Perform a CAS operation on the key, only if the value has not changed since the value was last retrieved, and casUnique extracted from a gets command.

    Perform a CAS operation on the key, only if the value has not changed since the value was last retrieved, and casUnique extracted from a gets command. We treat the "cas unique" token opaquely, but in reality it is a string-encoded u64.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    returns

    Stored if the operation was successful, Exists if the operation failed because someone else had changed the value, or NotFound if the key was not found in the cache.

    Definition Classes
    PoolingReadRepairClientBaseClient
    See also

    gets and getsResult for retreiving the cas token.

  12. def checkAndSet(key: String, value: Buf, casUnique: Buf): Future[CasResult]

    Perform a CAS operation on the key, only if the value has not changed since the value was last retrieved.

    Perform a CAS operation on the key, only if the value has not changed since the value was last retrieved. This is enforced by passing a casUnique token extracted from a gets command. If the casUnique token matches the one on the server, the value is replaced. We treat the "cas unique" token opaquely, but in reality it is a string-encoded u64.

    Neither flags nor expiry are supplied.

    returns

    Stored if the operation was successful, Exists if the operation failed because someone else had changed the value, or NotFound if the key was not found in the cache.

    Definition Classes
    BaseClient
    See also

    gets and getsResult for retreiving the cas token.

  13. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  14. def close(deadline: Time): Future[Unit]

    Close the underlying resources.

    Close the underlying resources.

    Definition Classes
    PoolingReadRepairClientBaseClient → Closable
  15. def close(after: Duration): Future[Unit]
    Definition Classes
    Closable
  16. final def close(): Future[Unit]
    Definition Classes
    Closable
  17. def decr(key: String, delta: Long): Nothing

    Decrement the key by n.

    Decrement the key by n.

    Interprets the stored value for key as a Long if it is parseable as a decimal representation of a 64-bit unsigned integer.

    This operation has no effect if there is no value there already.

    Definition Classes
    PoolingReadRepairClientBaseClient
  18. def decr(key: String): Future[Option[Long]]

    Decrement the key by 1.

    Decrement the key by 1.

    Interprets the stored value for key as a Long if it is parseable as a decimal representation of a 64-bit unsigned integer.

    This operation has no effect if there is no value there already.

    Definition Classes
    BaseClient
  19. def delete(key: String): Future[Boolean]

    Remove a key.

    Remove a key.

    returns

    true if deleted, false if not found

    Definition Classes
    PoolingReadRepairClientBaseClient
  20. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  21. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  22. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  23. def get(keys: Iterable[String]): Future[Map[String, Buf]]

    Get a set of keys from the server.

    Get a set of keys from the server.

    returns

    a Map[String, T] of all of the keys that the server had.

    Definition Classes
    BaseClient
    See also

    gets if you need a "cas unique" token.

  24. def get(key: String): Future[Option[Buf]]

    Get a key from the server.

    Get a key from the server.

    returns

    None if there is no value stored for key.

    Definition Classes
    BaseClient
    See also

    gets if you need a "cas unique" token.

  25. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  26. def getResult(keys: Iterable[String]): Future[GetResult]

    Get a set of keys from the server.

    Get a set of keys from the server. Returns a Future[GetResult] that encapsulates hits, misses and failures.

    Definition Classes
    PoolingReadRepairClientBaseClient
    See also

    getsResult if you need "cas unique" tokens.

  27. def getSubsetOfClients(): Seq[BaseClient[Buf]]
  28. def getWithFlag(keys: Iterable[String]): Future[Map[String, (Buf, Buf)]]

    Get a set of keys from the server, together with their flags

    Get a set of keys from the server, together with their flags

    returns

    a Map[String, (T, Buf)] of all the keys the server had, together with their flags

    Definition Classes
    BaseClient
    See also

    get if you do not need the flags

  29. def getWithFlag(key: String): Future[Option[(Buf, Buf)]]

    Get a key from the server along with its flags

    Get a key from the server along with its flags

    returns

    None if there is no value stored for key.

    Definition Classes
    BaseClient
    See also

    get if you do not need the flags.

  30. def gets(keys: Iterable[String]): Future[Map[String, (Buf, Buf)]]

    Get a set of keys from the server, together with a "cas unique" token.

    Get a set of keys from the server, together with a "cas unique" token. The token is treated opaquely by the memcache client but is in reality a string-encoded u64.

    returns

    a Map[String, (T, Buf)] of all the keys the server had, together with their "cas unique" token

    Definition Classes
    BaseClient
    See also

    checkAndSet for using the token.

    get if you do not need a "cas unique" token.

  31. def gets(key: String): Future[Option[(Buf, Buf)]]

    Get a key from the server along with a "cas unique" token.

    Get a key from the server along with a "cas unique" token. The token is treated opaquely by the memcache client but is in reality a string-encoded u64.

    returns

    None if there is no value stored for key.

    Definition Classes
    BaseClient
    See also

    checkAndSet for using the token.

    get if you do not need a "cas unique" token.

  32. def getsResult(keys: Iterable[String]): Nothing

    Get a set of keys from the server.

    Get a set of keys from the server. Returns a Future[GetsResult] that encapsulates hits, misses and failures. This variant includes the casToken from memcached.

    Definition Classes
    PoolingReadRepairClientBaseClient
    See also

    checkAndSet for using the token.

    getResult if you do not need "cas unique" tokens.

  33. def getsWithFlag(keys: Iterable[String]): Future[Map[String, (Buf, Buf, Buf)]]

    Get a set of keys from the server, together with a "cas unique" token and flags.

    Get a set of keys from the server, together with a "cas unique" token and flags. The token is treated opaquely by the memcache client but is in reality a string-encoded u64.

    returns

    a Map[String, (T, Buf, Buf)] of all the keys the server had, together with ther "cas unique" token and flags

    Definition Classes
    BaseClient
    See also

    checkAndSet for using the token.

    getWithFlag if you do not need the token.

    gets if you do not need the flag.

    get if you do not need the token or the flags.

  34. def getsWithFlag(key: String): Future[Option[(Buf, Buf, Buf)]]

    Get a key from the server along with its flags and a "cas unique" token.

    Get a key from the server along with its flags and a "cas unique" token.

    returns

    None if there is no value stored for key.

    Definition Classes
    BaseClient
    See also

    getWithFlag if you do not need the token.

    gets if you do not need the flags.

    get if you do not need the flags or the token.

  35. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  36. def incr(key: String, delta: Long): Nothing

    Increment the key by delta.

    Increment the key by delta.

    Interprets the stored value for key as a Long if it is parseable as a decimal representation of a 64-bit unsigned integer.

    This operation has no effect if there is no value there already.

    Definition Classes
    PoolingReadRepairClientBaseClient
  37. def incr(key: String): Future[Option[Long]]

    Increment the key by 1.

    Increment the key by 1.

    Interprets the stored value for key as a Long if it is parseable as a decimal representation of a 64-bit unsigned integer.

    This operation has no effect if there is no value there already.

    Definition Classes
    BaseClient
  38. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  39. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  40. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  41. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  42. def prepend(key: String, flags: Int, expiry: Time, value: Buf): Nothing

    Prepend bytes to the beginning of an existing key.

    Prepend bytes to the beginning of an existing key. If the key doesn't exist, the operation has no effect.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    returns

    true if stored, false if not stored

    Definition Classes
    PoolingReadRepairClientBaseClient
  43. def prepend(key: String, value: Buf): Future[Boolean]

    Prepend a set of bytes to the beginning of an existing key.

    Prepend a set of bytes to the beginning of an existing key. If the key doesn't exist, the operation has no effect.

    Neither flags nor expiry are supplied.

    returns

    true if stored, false if not stored

    Definition Classes
    BaseClient
  44. def quit(): Future[Unit]

    Send a quit command to the server.

    Send a quit command to the server. Alternative to release, for protocol compatibility.

    Definition Classes
    BaseClient
  45. val rand: Random
  46. def replace(key: String, flags: Int, expiry: Time, value: Buf): Nothing

    Replace bytes on an existing key.

    Replace bytes on an existing key. If the key doesn't exist, the operation has no effect.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    returns

    true if stored, false if not stored

    Definition Classes
    PoolingReadRepairClientBaseClient
  47. def replace(key: String, value: Buf): Future[Boolean]

    Replace an item if it exists.

    Replace an item if it exists. If it doesn't exist, the operation has no effect.

    Neither flags nor expiry are supplied.

    returns

    true if stored, false if not stored

    Definition Classes
    BaseClient
  48. def set(key: String, flags: Int, expiry: Time, value: Buf): Future[Unit]

    Store a key.

    Store a key. Override an existing value.

    flags is an arbitrary integer that the server stores along with the data and sends back when the item is retrieved. Clients may use this as a bit field to store data-specific information; this field is opaque to the server.

    expiry is the expiration time for entries. If it is Time.epoch, Time.Top, Time.Bottom or Time.Undefined then the item never expires, although it may be deleted from the cache to make room for other items. This is also the case for values where the number of seconds is larger than Long.MaxValue. Otherwise, clients will not be able to retrieve this item after the expiration time arrives (measured on the cache server).

    Definition Classes
    PoolingReadRepairClientBaseClient
  49. def set(key: String, value: Buf): Future[Unit]

    Store a key.

    Store a key. Override an existing values.

    Neither flags nor expiry are supplied.

    Definition Classes
    BaseClient
  50. def stats(args: Option[String]): Nothing

    Send a stats command with optional arguments to the server.

    Send a stats command with optional arguments to the server.

    returns

    a sequence of strings, each of which is a line of output

    Definition Classes
    PoolingReadRepairClientBaseClient
  51. def stats(): Future[Seq[String]]

    Send a stats command to the server.

    Send a stats command to the server.

    returns

    a sequence of strings, each of which is a line of output

    Definition Classes
    BaseClient
  52. def stats(args: String): Future[Seq[String]]

    Send a stats command with the given args to the server.

    Send a stats command with the given args to the server.

    returns

    a sequence of strings, each of which is a line of output

    Definition Classes
    BaseClient
  53. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  54. def toString(): String
    Definition Classes
    AnyRef → Any
  55. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  56. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  57. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  58. def withBytes: BaseClient[Array[Byte]]

    Adaptor to use Array[Byte] as values

    Adaptor to use Array[Byte] as values

    Definition Classes
    Client
  59. def withStrings: BaseClient[String]

    Adaptor to use String as values

    Adaptor to use String as values

    Definition Classes
    Client

Inherited from Client

Inherited from BaseClient[Buf]

Inherited from Closable

Inherited from AnyRef

Inherited from Any

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