Example usage for org.springframework.data.redis.connection RedisConnection sRandMember

Introduction

In this page you can find the example usage for org.springframework.data.redis.connection RedisConnection sRandMember.

Prototype

@Nullable
List<byte[]> sRandMember(byte[] key, long count);

Source Link

Document

Get count random elements from set at key .

Usage

From source file:com.mauersu.util.redis.DefaultSetOperations.java

public List<V> randomMembers(K key, final long count) {
    if (count < 0) {
        throw new IllegalArgumentException(
                "Use a positive number for count. " + "This method is already allowing duplicate elements.");
    }//from w w  w  .  jav  a2s  . c  o m
    final byte[] rawKey = rawKey(key);
    List<byte[]> rawValues = execute(new RedisCallback<List<byte[]>>() {
        public List<byte[]> doInRedis(RedisConnection connection) {
            connection.select(dbIndex);
            return connection.sRandMember(rawKey, -count);
        }
    }, true);

    return deserializeValues(rawValues);
}

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From source file:com.mauersu.util.redis.DefaultSetOperations.java

public Set<V> distinctRandomMembers(K key, final long count) {
    if (count < 0) {
        throw new IllegalArgumentException(
                "Negative count not supported. " + "Use randomMembers to allow duplicate elements.");
    }//from w w  w  . j  av  a  2 s  . c om
    final byte[] rawKey = rawKey(key);
    Set<byte[]> rawValues = execute(new RedisCallback<Set<byte[]>>() {
        public Set<byte[]> doInRedis(RedisConnection connection) {
            connection.select(dbIndex);
            return new HashSet<byte[]>(connection.sRandMember(rawKey, count));
        }
    }, true);

    return deserializeValues(rawValues);
}

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From source file:com.zxy.commons.cache.RedisUtils.java

/**
 * Get {@code count} random elements from set at {@code key}.
 * <p>//from   w w  w.j a v a2s . c o m
 * See http://redis.io/commands/srandmember
 * 
 * @param key key
 * @param count count
 * @return List<byte[]>
 */
public static List<byte[]> sRandMember(byte[] key, long count) {
    return redisTemplate.execute(new RedisCallback<List<byte[]>>() {
        @Override
        public List<byte[]> doInRedis(RedisConnection redis) throws DataAccessException {
            return redis.sRandMember(key, count);
        }
    });
}

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From source file:com.zxy.commons.cache.RedisHelper.java

/**
 * Get {@code count} random elements from set at {@code key}.
 * <p>//from  w  w w .j  ava  2s.  co m
 * See http://redis.io/commands/srandmember
 * 
 * @param key key
 * @param count count
 * @return List<byte[]>
 */
public List<byte[]> sRandMember(byte[] key, long count) {
    return redisTemplate.execute(new RedisCallback<List<byte[]>>() {
        @Override
        public List<byte[]> doInRedis(RedisConnection redis) throws DataAccessException {
            return redis.sRandMember(key, count);
        }
    });
}

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