Mão Core

mao-core is a library that can be used to implement microservices.

Getting started

Create a new Node.js project:

npm init

Create a directory for your project with the following structure:

- package.json
- app/
	- .env
	- index.js
	- config/
		- config.json

Edit the package.json file as follows:

"main": "app/index.js",
"scripts": {
  "start": "nodemon app/index.js"
},
"dependencies": {
	"mao-core": "^0.1"
},
"devDependencies": {
  "nodemon": "^3.1.11"
}

Create the file app/index.js with the following content:

// Internal dependencies

const App = require(`mao-core`).App;


// Create the app

let app = new App
(
	[
		// Create your controllers here
	]
);


// Start the app

app.start().catch
(
	(error) =>
	{
		console.log(error.message);
	}
);


// Export app

module.exports = app;

Create the file app/config/config.json with the following content (don't forget to replace "your-service-code"):

{
	"mao":
	{
		"core":
		{
			"registry": {"ENV": "MAO_CORE_REGISTRY"},
			"service":
			{
				"name": "your-service-code",
				"url": {"ENV": "MAO_CORE_SERVICE_URL"}
			},
			"server":
			{		
				"host": {"ENV": "MAO_CORE_SERVER_HOST"},
				"port": {"ENV": "MAO_CORE_SERVER_PORT"}
			}
		}
	}
}

Create the file app/config/api.yml with the following content (don't forget to replace "your-service-code"). Every route registered in controllers must be defined there.

openapi: "3.0.3"
info:
  version: "1.0.0"
  title: "your-service-code"
  license:
    name: "MIT"
    url: "https://opensource.org/licenses/mit-license.php"
paths:
  /api/health/ready:
    get:
      description: "Check whether service is ready"
      responses:
        "200":
          description: "Service is ready"

Create the .env file with the following content:

MAO_CORE_REGISTRY=http://localhost:8080

MAO_CORE_SERVICE_URL=http://localhost:8081

MAO_CORE_SERVER_HOST=localhost
MAO_CORE_SERVER_PORT=8081

Install dependencies:

npm install

Start the app:

npm start