About

eris-sharder is a powerful sharding manager for the discord Eris library. It uses Node.js's cluster module to spread shards evenly among all the cores.

Installation and usage

To download eris-sharder, run npm install eris-sharder --save

To use eris-sharder, simply copy this code and place it in a file, in the same directory that you ran the npm install in:

const Sharder = require('eris-sharder').Master;
const sharder = new Sharder(token, pathToMainFile, options);

Options

Name	Description
token	your discord bot token. It will be used to calculate how many shards to spawn and to pass it on to your main file.
pathToMainFile	path to a file that exports a class. The class must containt a method called "launch". In the constructor the only paramater you should put is for the bot.
options.stats	boolean. When set to true it enables stats output.
options.webhooks	Object.{shard: {id: "webhookID", token: "webhookToken"}, cluster:{id: "webhookID", token: "webhookToken"}}
options.clientOptions	A object of client options you want to pass to the Eris client constructor.
options.clusters	The number of how many clusters you want. Defaults to the amount of threads
options.clusterTimeout	Number of seconds between starting up clusters. Values lower than 5 may lead to an Invalid Session on first shard.
options.shards	The number of total shards you plan to run. Defaults to the amount that the gateway reccommends, taking into account options.guildsPerShard
options.firstShardID	ID of the first shard to start on this instance. Defaults to 0
options.lastShardID	ID of the last shard to start on this instance. Defaults to options.shards - 1
options.debug	Boolean to enable debug logging.
options.statsInterval	Interval to release the stats event in milliseconds. Defaults to every minute
options.name	Name to print on startup. By default it's "Eris-Sharder".
options.guildsPerShard	Number to calculate how many guilds per shard. Defaults to 1300. Overriden if you only have 1 shard.

To see an example, click here

IPC

eris-sharder supports a variety of IPC events. All IPC events can be used via process.send({type: "event"});

Logging

eris-sharder supports the following IPC logging events.

Name	Example	Description
log	process.send({name: "log", msg: "example"});	Logs to console with gray color.
info	process.send({name: "info", msg: "example"});	Logs to console in green color.
debug	process.send({name: "debug", msg: "example"});	Logs to console in cyan color.
warn	process.send({name: "warn", msg: "example"});	Logs to console in yellow color.
error	process.send({name: "error", msg: "example"});	Logs to console in red color.

Info

In every cluster when your code is loaded, if you extend the Base class you get access to this.bot, this.clusterID, and this.ipc. this.ipc has a couple methods which you can find very useful.

Name	Example	Description
register	this.ipc.register(event, callback);	Using this you can register to listen for events and a callback that will handle them
unregister	this.ipc.unregister(event);	Use this to unregister for an event
broadcast	this.ipc.broadcast(name, message);	Using this you can send a custom message to every cluster
sendTo	this.ipc.sendTo(cluster, name, message)	Using this you can send a message to a specific cluster
fetchUser	await this.ipc.fetchUser(id)	Using this you can search for a user by id on all clusters
fetchGuild	await this.ipc.fetchGuild(id)	Using this you can search for a guild by id on all clusters
fetchChannel	await this.ipc.fetchChannel(id)	Using this you can search for a channel by id on all clusters

Example

Directory Tree

In this example the directory tree will look something like this:

Project/
├── node-modules/
│   ├── eris-sharder
|
├── src/
│   ├── main.js
│   
├── index.js

Example of main.js

const Base = require('eris-sharder').Base;
class Class extends Base{
    constructor(bot) {
        super(bot);
    }

    launch() {

    }

}

module.exports = Class;

Example of index.js

const Sharder = require('eris-sharder').Master;
const sharder = new Sharder("someToken", "/src/main.js", {
  stats: true,
  debug: true,
  guildsPerShard: 1500,
  name: "ExampleBot",
  webhooks: {
    shard: {
      id: "webhookID",
      token: "webhookToken"
    },
     cluster: {
      id: "webhookID",
      token: "webhookToken"
    }
  },
  clientOptions: {
      messageLimit: 150,
      defaultImageFormat: "png"
  }
});

sharder.on("stats", stats => {
  console.log(stats);
});

Starting the script

node index.js

NOTICE

If you are using pm2 to run your script add the -- --colors option to enable the colorful logging.