Module lettuce.core

Package io.lettuce.core.api.async

Interface RedisHLLAsyncCommands<K,V>

Type Parameters:

K - Key type.

V - Value type.

All Known Subinterfaces:

RedisAdvancedClusterAsyncCommands<K,V>, RedisAsyncCommands<K,V>, RedisClusterAsyncCommands<K,V>, RedisClusterPubSubAsyncCommands<K,V>, RedisPubSubAsyncCommands<K,V>

All Known Implementing Classes:

AbstractRedisAsyncCommands, RedisAdvancedClusterAsyncCommandsImpl, RedisAsyncCommandsImpl, RedisClusterPubSubAsyncCommandsImpl, RedisPubSubAsyncCommandsImpl

public interface RedisHLLAsyncCommands<K,V>

Asynchronous executed commands for HyperLogLog (PF* commands).

Since:

3.0

Author:

Mark Paluch

Generated class:

by io.lettuce.apigenerator.CreateAsyncApi

Method Summary

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

Method Details

pfadd

RedisFuture<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

RedisFuture<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

RedisFuture<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.