KeyCommands

trait KeyCommands extends AnyRef

This trait implements key commands.

Self Type: KeyCommands with NonBlockingConnection

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AnyRef, Any

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Client, Redis, RedisCluster, TransactionBuilder

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final def !=(arg0: Any): Boolean
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final def ##(): Int
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final def ==(arg0: Any): Boolean
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final def asInstanceOf[T0]: T0
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def clone(): AnyRef
Attributes
protected[java.lang]
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@throws(classOf[java.lang.CloneNotSupportedException]) @native()
def del(keys: String*): Future[Long]
Deletes one or multiple keys.
Deletes one or multiple keys.
keys
key(s) to delete
returns
the number of keys that were deleted
Since
1.0.0
Note
a key is ignored if it does not exist
def dump(key: String): Future[Option[Array[Byte]]]
Returns a serialized version of the value stored at the specified key.
Returns a serialized version of the value stored at the specified key.
key
key to dump
returns
the serialized value or None if the key does not exist
Since
2.6.0
final def eq(arg0: AnyRef): Boolean
Definition Classes
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def equals(arg0: AnyRef): Boolean
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def exists(key: String): Future[Boolean]
Determines if a key exists.
Determines if a key exists.
key
key to check for existence
returns
true if the key exists, false otherwise
Since
1.0.0
def expire(key: String, ttlSeconds: Int): Future[Boolean]
Sets a key's time to live in seconds.
Sets a key's time to live in seconds.
key
key to expire
ttlSeconds
time-to-live in seconds
returns
true if the ttl was set, false if key does not exist or the timeout could not be set
Since
1.0.0
def expireAt(key: String, timestamp: Long): Future[Boolean]
Sets the expiration for a key as a UNIX timestamp.
Sets the expiration for a key as a UNIX timestamp.
key
key to expire
timestamp
UNIX timestamp at which the key should expire
returns
true if the ttl was set, false if key does not exist or the timeout could not be set
Since
1.2.0
def finalize(): Unit
Attributes
protected[java.lang]
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@throws(classOf[java.lang.Throwable])
final def getClass(): Class[_ <: AnyRef]
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@native()
def hashCode(): Int
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@native()
final def isInstanceOf[T0]: Boolean
Definition Classes
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def keys(pattern: String): Future[Set[String]]
Finds all keys matching the given pattern.
Finds all keys matching the given pattern.
pattern
pattern to search for
returns
the matched keys, or the empty set if no keys match the given pattern
Since
1.0.0
def migrate(key: String, host: String, port: Int = 6379, database: Int = 0, timeout: FiniteDuration = 2 seconds, copy: Boolean = false, replace: Boolean = false): Future[Unit]
Atomically transfers a key from a Redis instance to another one.
Atomically transfers a key from a Redis instance to another one.
key
key to transfer
host
destination host
port
destination port
database
destination database
timeout
timeout duration, up to milliseconds precision
copy
if true, do not remove the key from the local instance
replace
if true, replace existing key on the remote instance
Since
2.6.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] if an error occurs
def move(key: String, database: Int): Future[Boolean]
Moves a key to another database.
Moves a key to another database.
key
key to move
database
destination database
returns
true if key was moved, false otherwise
Since
1.0.0
final def ne(arg0: AnyRef): Boolean
Definition Classes
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final def notify(): Unit
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@native()
final def notifyAll(): Unit
Definition Classes
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@native()
def objectEncoding(key: String): Future[Option[String]]
Returns the kind of internal representation used in order to store the value associated with a key.
Returns the kind of internal representation used in order to store the value associated with a key.
key
the key
returns
the object encoding or None if the key does not exist
Since
2.2.3
Note
Objects can be encoded in different ways: Strings can be encoded as raw or int Lists can be encoded as ziplist or linkedlist Sets can be encoded as intset or hashtable Hashes can be encoded as zipmap or hashtable SortedSets can be encoded as ziplist or skiplist
def objectIdleTime(key: String): Future[Option[Long]]
Returns the number of seconds since the object stored at the specified key is idle (not requested by read or write operations).
Returns the number of seconds since the object stored at the specified key is idle (not requested by read or write operations).
key
the key
returns
the number of seconds since the object is idle or None if the key does not exist
Since
2.2.3
Note
While the value is returned in seconds the actual resolution of this timer is 10 seconds, but may vary in future implementations.
def objectRefCount(key: String): Future[Option[Long]]
Returns the number of references of the value associated with the specified key.
Returns the number of references of the value associated with the specified key.
key
the key
returns
the number of references or None if the key does not exist
Since
2.2.3
def pExpire(key: String, ttlMillis: Long): Future[Boolean]
Sets a key's time to live in milliseconds.
Sets a key's time to live in milliseconds.
key
key to expire
ttlMillis
time-to-live in milliseconds
returns
true if the ttl was set, false if key does not exist or the timeout could not be set
Since
2.6.0
def pExpireAt(key: String, timestampMillis: Long): Future[Boolean]
Sets the expiration for a key as a UNIX timestamp specified in milliseconds.
Sets the expiration for a key as a UNIX timestamp specified in milliseconds.
key
key to expire
timestampMillis
UNIX milliseconds-timestamp at which the key should expire
returns
true if the ttl was set, false if key does not exist or the timeout could not be set
Since
2.6.0
def pTtl(key: String): Future[Either[Boolean, Long]]
Gets the time to live for a key in milliseconds.
Gets the time to live for a key in milliseconds.
```
result match {
  case Left(false) => // key does not exist
  case Left(true) => // key exists but has no associated expire
  case Right(ttl) =>
}
```
key
the target key
returns
Right(ttl) where ttl is the time-to-live in milliseconds for specified key, Left(false) if key does not exist or Left(true) if key exists but has no associated expire
Since
2.6.0
Note
For Redis version <= 2.8.x, Left(false) will be returned when the key does not exists and when it exists but has no associated expire (Redis returns the same error code for both cases). In other words, you can simply check the following
result match { case Left(_) => case Right(ttl) => }
def persist(key: String): Future[Boolean]
Removes the expiration from a key.
Removes the expiration from a key.
key
key to persist
returns
true if key was persisted, false if key does not exist or does not have an associated timeout
Since
2.2.0
def randomKey(): Future[Option[String]]
Returns a random key from the keyspace.
Returns a random key from the keyspace.
returns
the random key or None when the database is empty associated timeout
Since
1.0.0
def rename(key: String, newKey: String): Future[Unit]
Renames a key.
Renames a key.
key
source key
newKey
destination key
Since
1.0.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] if the source and destination keys are the same, or when key does not exist
Note
if newKey already exists, it is overwritten
def renameNX(key: String, newKey: String): Future[Boolean]
Renames a key, only if the new key does not exist.
Renames a key, only if the new key does not exist.
key
source key
newKey
destination key
returns
true if key was renamed to newKey, false if newKey already exists
Since
1.0.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] if the source and destination keys are the same, or when key does not exist
def restore[W](key: String, serializedValue: W, ttlOpt: Option[FiniteDuration] = None)(implicit arg0: Writer[W]): Future[Unit]
Creates a key using the provided serialized value, previously obtained using DUMP.
Creates a key using the provided serialized value, previously obtained using DUMP.
key
destination key
serializedValue
serialized value, previously obtained using DUMP
ttlOpt
optional time-to-live duration of newly created key (expire)
Since
2.6.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] if the value could not be restored
def scan(cursor: Long, matchOpt: Option[String] = None, countOpt: Option[Int] = None): Future[(Long, Set[String])]
Incrementally iterates the set of keys in the currently selected Redis database.
Incrementally iterates the set of keys in the currently selected Redis database.
cursor
the offset
matchOpt
when defined, the command only returns elements matching the pattern
countOpt
when defined, provides a hint of how many elements should be returned
returns
a pair containing the next cursor as its first element and the set of keys as its second element
Since
2.8.0
def sort[R](key: String, byOpt: Option[String] = None, limitOpt: Option[(Long, Long)] = None, get: Iterable[String] = Nil, desc: Boolean = false, alpha: Boolean = false)(implicit arg0: Reader[R]): Future[List[Option[R]]]
Sorts the elements of a list, set or sorted set.
Sorts the elements of a list, set or sorted set.
key
key of list, set or sorted set to be sorted
byOpt
optional pattern for sorting by external values, can also be "nosort" if the sorting operation should be skipped (useful when only sorting to retrieve objects with get). The * gets replaced by the values of the elements in the collection
limitOpt
optional pair of numbers (offset, count) where offset specified the number of elements to skip and count specifies the number of elements to return starting from offset
get
list of patterns for retrieving objects stored in external keys. The * gets replaced by the values of the elements in the collection
desc
indicates whether elements should be sorted descendingly
alpha
indicates whether elements should be sorted lexicographically
returns
the sorted list of elements, or the empty list if the key does not exist
Since
1.0.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] whenever an error occurs
def sortAndStore(key: String, targetKey: String, byOpt: Option[String] = None, limitOpt: Option[(Long, Long)] = None, get: Iterable[String] = Nil, desc: Boolean = false, alpha: Boolean = false): Future[Long]
Sorts the elements of a list, set or sorted set and then store the result.
Sorts the elements of a list, set or sorted set and then store the result.
key
key of list, set or sorted set to be sorted
targetKey
key of list, set or sorted set to be sorted
byOpt
optional pattern for sorting by external values, can also be "nosort" if the sorting operation should be skipped (useful when only sorting to retrieve objects with get). The * gets replaced by the values of the elements in the collection
limitOpt
optional pair of numbers (offset, count) where offset specified the number of elements to skip and count specifies the number of elements to return starting from offset
get
list of patterns for retrieving objects stored in external keys. The * gets replaced by the values of the elements in the collection
desc
indicates whether elements should be sorted descendingly
alpha
indicates whether elements should be sorted lexicographically
returns
the number of elements in the newly stored sorted collection
Since
1.0.0
Exceptions thrown
[[scredis.exceptions.RedisErrorResponseException]] whenever an error occurs
final def synchronized[T0](arg0: => T0): T0
Definition Classes
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def toString(): String
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def ttl(key: String): Future[Either[Boolean, Int]]
Gets the time to live for a key in seconds.
Gets the time to live for a key in seconds.
```
result match {
  case Left(false) => // key does not exist
  case Left(true) => // key exists but has no associated expire
  case Right(ttl) =>
}
```
key
the target key
returns
Right(ttl) where ttl is the time-to-live in seconds for specified key, Left(false) if key does not exist or Left(true) if key exists but has no associated expire
Since
1.0.0
Note
For Redis version <= 2.8.x, Left(false) will be returned when the key does not exists and when it exists but has no associated expire (Redis returns the same error code for both cases). In other words, you can simply check the following
result match { case Left(_) => case Right(ttl) => }
def type(key: String): Future[Option[Type]]
Determine the type stored at key.
Determine the type stored at key.
key
key for which the type should be returned
returns
type of key, or None if key does not exist
Since
1.0.0
Note
This method needs to be called as follows:
client.`type`(key)
final def wait(): Unit
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@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long, arg1: Int): Unit
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@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
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@throws(classOf[java.lang.InterruptedException]) @native()

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KeyCommands

trait KeyCommands extends AnyRef

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trait KeyCommands extends AnyRef

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KeyCommands