@idex/nucleus.core

Nucleus

Nucleus is a flexible library that offers tools to implement a distributed micro-service(-like) architecture in NodeJS.

IDEX Nucleus Core is the framework to build flexible, scalable and structured back-end architecture. It includes:

• Structured dataflow;
• Inter-engine communication protocol;
• Content persistence API;
• Content relationship powered by Graph technology;
• Intuitive workflow;

Getting started

NPM

You can quickly and easily install IDEX Nucleus Core to your project using NPM. Make sure to install NodeJS and NPM before;

$ npm install @idex/nucleus.core

Redis

The communication of Nucleus is heavily based on Redis, first and for all make sure to install Redis. Redis installation guide

For Nucleus to work correctly, you need to make sure that your server can use keyspace notification.
You can test that keyspace notification is enabled using the redis-cli:

$ redis-cli
127.0.0.1:6379> CONFIG GET notify-keyspace-events
1) "notify-keyspace-events"
2) "AKE"

If it isn't enabled you can enable it manually using the CONFIG SET command:

$ redis-cli
127.0.0.1:6379> CONFIG SET notify-keyspace-events AKE
OK

or, you can copy the redis.conf file from Nucleus root directory into your project.

$ redis-server PATH_TO_PROJECT/redis.conf

Nucleus Engine

The Nucleus engine (engine for short) is used to interact with the communication layer. It is task to publish/handle actions and events.

Create a new Engine

You can create an engine by simply instantiating the NucleusEngine class:

const { NucleusEngine } = require('@idex/nucleus.core');

const $engine = new NucleusEngine('Test');

// Here, `$engine` is a proxy: it is both a valid promise and the instantiated Nucleus engine.

$engine
      // The engine is ready to be used.
    .then(() => {
      // Do something with the engine.
    })
    // Something happened during the initialization of the engine.
    .catch(console.error);

Checkout the tutorials for your first steps:

1. Create a basic engine
2. Create a basic API with public Gateway
3. Create a persistent storage API

License

MIT License

Copyright (c) 2018 Sebastien Filion

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.

Contributing

1. Fork it (https://github.com/idexlabs/idex.nucleus.core/fork)
2. Create your feature branch (git checkout -b feature/foo-bar)
3. Commit your changes (git commit -am 'Add some fooBar')
4. Push to the branch (git push origin feature/food-bar)
5. Create a new Pull Request

Please use the following namespace convention to name you branch:

• feature/[:issue-number/]:feature-name Marks a branch that introduce a new feature. Add the issue number if it is available. ie: feature/#24/emoji-action-name;
• bugfix/[:issue-number/]:bug-name Marks a branch that fixes a bug. Add the issue number if it is available. ie: bugfix/#13/engine-cleanup;
• change/[:issue-number/]:change-name Marks a branch that makes a change to the codebase or documentation. Add the issue number if it is available. ie: change/update-release-note;