io.lettuce.core.api.sync

Interface RedisHLLCommands<K,V>

Type Parameters:

K - Key type.

V - Value type.

All Known Subinterfaces:

RedisAdvancedClusterCommands<K,V>, RedisClusterCommands<K,V>, RedisClusterPubSubCommands<K,V>, RedisCommands<K,V>, RedisPubSubCommands<K,V>

public interface RedisHLLCommands<K,V>

Synchronous executed commands for HyperLogLog (PF* commands).

Since:

3.0

Author:

Mark Paluch

Generated class:

by io.lettuce.apigenerator.CreateSyncApi

Method Summary

Modifier and Type	Method and Description
Long	pfadd(K key, V... values) Adds the specified elements to the specified HyperLogLog.
Long	pfcount(K... keys) Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).
String	pfmerge(K destkey, K... sourcekeys) Merge N different HyperLogLogs into a single one.

Method Detail

pfadd

Long pfadd(K key,
           V... values)

Adds the specified elements to the specified HyperLogLog.

Parameters:

key - the key.

values - the values.

Returns:

Long integer-reply specifically: 1 if at least 1 HyperLogLog internal register was altered. 0 otherwise.

pfmerge

String pfmerge(K destkey,
               K... sourcekeys)

Merge N different HyperLogLogs into a single one.

Parameters:

destkey - the destination key.

sourcekeys - the source key.

Returns:

String simple-string-reply The command just returns OK.

pfcount

Long pfcount(K... keys)

Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).

Parameters:

keys - the keys.

Returns:

Long integer-reply specifically: The approximated number of unique elements observed via PFADD.