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#![allow(unused_imports)]
use std::{
collections::HashMap,
io::{Read, Write},
net::{TcpListener, TcpStream},
sync::{Arc, Mutex},
thread,
};
mod resp_commands;
mod resp_parser;
use resp_commands::RedisCommands;
use resp_parser::{parse, RespType};
pub type SharedCache = Arc<Mutex<HashMap<String, String>>>;
fn handle_client(mut stream: TcpStream, cache: SharedCache) {
let mut buffer = [0; 512];
loop {
let bytes_read = match stream.read(&mut buffer) {
Ok(0) => return, // connection closed
Ok(n) => n,
Err(_) => return, // error occurred
};
let parsed_resp = parse(&buffer).unwrap();
let response = RedisCommands::from(parsed_resp.0).execute(cache.clone());
// Hardcode PONG response for now
stream.write(&response).unwrap();
// Echo the message back
// if let Err(_) = stream.write_all(&buffer[..bytes_read]) {
// return; // writing failed
// }
}
}
fn main() -> std::io::Result<()> {
let listener = TcpListener::bind("127.0.0.1:6379").unwrap();
let cache: SharedCache = Arc::new(Mutex::new(HashMap::new()));
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let cache_clone = cache.clone();
thread::spawn(|| {
handle_client(stream, cache_clone);
});
}
Err(e) => {
eprintln!("Connection failed: {}", e);
}
}
}
Ok(())
}
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