tcp-mutex

This small library is there to acquire a tcp based lock by opening a tcp-server. Since ports cannot be listened from more than 1 process we can use this behaviour to acquire a kind of lock based on tcp-port.

Installation

npm i --save https://github.com/7c/tcp-mutex 

Typescript

import { tryLock } from '@7c/tcp-mutex';

// somewhere in your main code entry
await tryLock(1337)

CommonJS

const { tryLock } = require('@7c/tcp-mutex');

tryLock(1337).then(()=>{
    console.log("locked successfully");
    // we can start our application here
}).catch(err=>{
    console.log("This application already started");
    process.exit(0);
});

Demo