RedisHLLConnection.java

package com.lambdaworks.redis;

import com.lambdaworks.redis.api.sync.RedisHLLCommands;

/**
 * Synchronous executed commands for HyperLogLog (PF* commands).
 * 
 * @param <K> Key type.
 * @param <V> Value type.
 * @author Mark Paluch
 * @since 3.0
 * @deprecated Use {@link RedisHLLCommands}
 */
@Deprecated
public interface RedisHLLConnection<K, V> {
    /**
     * Adds the specified elements to the specified HyperLogLog.
     *
     * @param key the key
     * @param value the value
     * @param moreValues more values
     *
     * @return Long integer-reply specifically:
     *
     *         1 if at least 1 HyperLogLog internal register was altered. 0 otherwise.
     */
    Long pfadd(K key, V value, V... moreValues);

    /**
     * Merge N different HyperLogLogs into a single one.
     *
     * @param destkey the destination key
     * @param sourcekey the source key
     * @param moreSourceKeys more source keys
     *
     * @return Long simple-string-reply The command just returns {@code OK}.
     */
    String pfmerge(K destkey, K sourcekey, K... moreSourceKeys);

    /**
     * Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).
     *
     * @param key the key
     * @param moreKeys more keys
     *
     * @return Long integer-reply specifically:
     *
     *         The approximated number of unique elements observed via {@code PFADD}.
     */
    Long pfcount(K key, K... moreKeys);

}