Package org.springframework.data.redis.core

Interface HyperLogLogOperations<K,V>

public interface HyperLogLogOperations<K,V>

Since:

1.5

Author:

Christoph Strobl

Method Summary

Modifier and Type	Method	Description
Long	add(K key, V... values)	Adds the given values to the key.
void	delete(K key)	Removes the given key.
Long	size(K... keys)	Gets the current number of elements within the key.
Long	union(K destination, K... sourceKeys)	Merges all values of given sourceKeys into destination key.

Method Details

add

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

Adds the given values to the key.

Parameters:

key - must not be null.

values - must not be null.

Returns:

1 of at least one of the values was added to the key; 0 otherwise. null when used in pipeline / transaction.

size

Long size(K... keys)

Gets the current number of elements within the key.

Parameters:

keys - must not be null or empty.

Returns:

null when used in pipeline / transaction.

union

Long union(K destination,
 K... sourceKeys)

Merges all values of given sourceKeys into destination key.

Parameters:

destination - key of HyperLogLog to move source keys into.

sourceKeys - must not be null or empty.

Returns:

null when used in pipeline / transaction.

delete

void delete(K key)

Removes the given key.

Parameters:

key - must not be null.