darcon

darcon

Simple Messaging Bus for Node.js entities over NatsIO

The library allows one to transparently publish and scale plain vanilla JS objects to a running nats.io instance as services objects.

The concept is simple:

• entities with services to be published are defined within your application. Each entity must possess a unique name.
• all functions defined be the entities are can be called through the message bus
• any amount of darcon instance can be created around a given entity allowing one to scale a service endlessly over nats.io.

!Note: the presente of the messge bus induces the requirement of 'jsonifiable' objects to be passed as paramters!

A single darcon instance can manage multiple entities. To scale a service up, a single entity can be published to multiple darcon instances.

The darcon instances know about each other and share the "map of entities" and manage message transmission to load balance.

Installation

npm install daron

Usage

const Darconer = require('darcon')
// ...
await Darconer.init( {
	nats: {
		servers: 'nats://localhost:4222'
	},

	log: {
		level: 'info'
	}
} )
// ...
await Darconer.publish(
	{
		name: 'Marie',
		async greetings () {
			return 'Hello'
		}
	}
)

That is all!

License

(The MIT License)

Copyright (c) 2020 Imre Fazekas

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Bugs

See https://github.com/imrefazekas/darcon/issues.