question: public static void checkDuplicateRequest ( RedisClient redisClient , String uri , Buffer buffer , String ttl , Handler < Boolean > callback ) { Integer timeToLive = parseTimeToLive ( ttl ) ; String redisKey = getRedisKey ( uri , HashCodeGenerator . createHashCode ( uri , buffer . toString ( ) ) ) ; handleStorage ( redisClient , redisKey , timeToLive , callback ) ; }
target:  This method checks if an entry for the provided information (uri and buffer) is stored in the redis database. When no entry was found in the database, a new entry will be saved to the database using a key which is created from the given parameters (uri and buffer). The new entry expires after ttl has expired.