miniredis's Introduction

miniredis

A minimal implementation of an in memory key value store. This is a toy project to learn more about redis and C++. It is not intended to be used in production.

Build

Or use some other build system of your choice.

mkdir build
cd build
cmake ..
make

Run

./miniredis

Folder structure

The main entry point is server.cpp This contains the main level abstraction and implementation of the server. The other files in the folder are generic implementations of different data structures in use in the server.

Server

main() gets back a file descriptor from the kernel and sets up a listening socket connection with an addr.
main then handles incoming connections. When a connection is accepted, a new thread is spawned to handle the connection.
When a connection is made, it will contain a header and some data. The header contains the length of the data.
The data will have some type of request. The server will parse the request and send back a response.

Commands

The server implements the following commands. The commands are case sensitive.

keys - returns all keys in the store
get <key> - returns the value of the key
set <key> <value> - sets the value of the key
del <key> - deletes the key
pexpire <key> <time> - sets the expiration time of the key in milliseconds
pttl <key> - returns the time to live of the key in milliseconds
zadd <key> <score> <value> - adds a value to a sorted set with a score
zrem <key> <value> - removes a value from a sorted set
zscore <key> <value> - returns the score of a value in a sorted set
zquery <key> <min> <max> <offset> <count> - returns a range of values in a sorted set