forgeCache

An in-memory cache server written in Go. Implements the RESP protocol over raw TCP, supports string and hash data types, key expiry, and AOF persistence.

Features

• RESP protocol — complete parser and serializer for the Redis wire protocol
• TCP server — concurrent client handling via goroutines
• Commands — STRING, HASH, and key commands (see full list below)
• TTL & expiry — lazy expiry on read + active background cleanup every minute
• AOF persistence — write commands logged to disk, replayed on startup to restore state

Supported Commands

Command	Description
PING [message]	Returns PONG or the message
SET key value [EX seconds]	Set a key with optional expiry
GET key	Get a string value
DEL key [key ...]	Delete one or more keys
EXISTS key [key ...]	Count how many keys exist
INCR key	Increment integer value
DECR key	Decrement integer value
APPEND key value	Append to a string
EXPIRE key seconds	Set TTL on a key
TTL key	Get remaining TTL in seconds
HSET key field value [field value ...]	Set hash fields
HGET key field	Get a hash field
HDEL key field [field ...]	Delete hash fields
HGETALL key	Get all fields and values
HEXISTS key field	Check if a field exists
HLEN key	Number of fields in a hash

Getting Started

git clone https://github.com/forge34/forgeCache
cd forgeCache
make build
make run

Connect using redis-cli:

redis-cli -p 4000