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package com.rustknife.jknife.cache;

import org.springframework.data.redis.cache.CacheKeyPrefix;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * Default implementation for {@link CacheKeyPrefix} which uses the given cache name and a delimiter for creating the
 * prefix.
 *
 * @author yoke
 */
public class DefaultRedisCachePrefix implements CacheKeyPrefix
{

    private final RedisSerializer serializer = new StringRedisSerializer();
    private final String delimiter;

    public DefaultRedisCachePrefix() {
        this(":");
    }

    public DefaultRedisCachePrefix(String delimiter) {
        this.delimiter = delimiter;
    }

    public byte[] prefix(String cacheName) {
        return serializer.serialize((delimiter != null ? cacheName.concat(delimiter) : cacheName.concat(":")));
    }

    @Override
    public String compute(String cacheName) {
        return delimiter != null ? cacheName.concat(delimiter) : cacheName.concat(":");
    }
}