Gusto

Micro service library

Gusto is a simple micro service library.

Needs node version > 5.00 to work.

TODO. Add more message transport layers.

Add a better pattern matching transport that supports nested objects.

Documentation, more examples...

listen to all messages

'use strict'

const _gusto = require('gusto');
const gusto  = new _gusto();

gusto.connect('global_message_bus', () => {

	gusto.tap('*', (err, message) => {

		// listen to all messages
		console.log(message);
	});
});

listen for a paticular micro service

'use strict'

const _gusto = require('gusto');
const gusto  = new _gusto();

gusto.connect('global_message_bus', () => {

	gusto.tap('{ math: "*" }', (err, message) => {

		// listen to all messages from the math micro service.
		console.log(message);
	});
});

// the math microservice would emit messages like this:

gusto.emit({
	math: {
		result: some_operation(...operands)
	}
});

another example

'use strict'

const _gusto = require('gusto');
const gusto  = new _gusto();

gusto.connect('global_message_bus', () => {
	
	gusto.tap('{ demo: "*" }', (err, message) => {
		if(err) console.log(err);
		let parse    = message.demo.cmd;
		let _parse   = parse.split(':');
		let left_op  = _parse[1].split('_')[0];
		let right_op = _parse[1].split('_')[1];
		let result = parseInt(left_op) + parseInt(right_op);
		gusto.emit({
			math: {
				result: result,
				timestamp: new Date().toISOString()
			}
		});
	});
});

setInterval(()=>{
	let left_op  = Math.floor(Math.random()*11)+5;
	let right_op = Math.floor(Math.random()*11)+5;
	let command  = `add:${left_op}_${right_op}`;
	gusto.emit({
		demo: {
			cmd: command,
			timestamp: new Date().toISOString()
		}
	});
}, 5000);

gusto.tap('*', (err, message) => {
	console.log('[monitor] ', message);
	/*
	[example output]
		[monitor]  { demo: { cmd: 'add:9_5' } }
		[monitor]  { math: { result: 14 } }
		[monitor]  { demo: { cmd: 'add:6_11' } }
		[monitor]  { math: { result: 17 } }
	*/
})

setTimeout(() => {
	console.log('Thanks for trying Gusto!');
	process.exit(0);
}, 45000);