Imbed

Imbed is a lightweight in-memory key-value store (inspired by Redis) built in Java. Uses RESP for compatibility with existing Redis clients. No persistence.

Features

Currently implemented features:

• TCP server that listens for connections on a specified port (default: 6379).
• Thread-safe storage using ConcurrentHashMap.
• Basic command execution via a CommandExecutor (see supported commands in the Commands section).
• Multiple clients can connect concurrently.
• Lightweight, minimal dependencies.
• No CLI support

Run with Docker

1. Pull the Docker image

docker pull 3akare/imbed:latest

2. Run the container

docker run -d -p 6379:6379 --name imbed-server 3akare/imbed:latest

This will:

• Start the imbed server in a container.
• Map container port 6379 to host port 6379.

3. Stop the container

docker stop imbed-server

4. Remove the container

docker rm imbed-server

Commands

Example supported commands (will vary based on your CommandExecutor implementation):

Command	Description	Example	Response (Success)
PING	Tests the connection	PING	+PONG
ECHO message	Returns the given message	ECHO hello_world	$11\r\nhello_world
SET key value	Stores a value under a key	SET name David	+OK
SET key value [EX|PX] ttl	Stores a value with a time-to-live (seconds or milliseconds)	SET username 3akare EX 10	+OK
GET key	Retrieves the value of a key	GET name	$5\r\nDavid
DEL key	Deletes a key-value pair	DEL name	:1
KEYS	Retrieves all keys	KEYS	*1\r\n$4\r\nname
EXPIRE key ttl	Updates TTL of a key-value pair	EXPIRE name 20	:1
TTL key	Retrieves remaining TTL of a key in seconds (-1 = no expire, -2 = not found)	TTL name	:10

⚙️ Development Notes

• Default port is 6379.
• Server can be configured by editing the main method in Main.java.
• Each client runs in its own thread to allow concurrent access.