What is a Blueprint Module?

A Blueprint module is a node module that contains a reusable Blueprint entities that can be applied to a Blueprint application. The goal of a Blueprint module is to provide functionality that address a certain application concern. For example, a Blueprint module many provide support for MongoDB, or it may implement a solution for integrating a paywall into your application. This way, the Blueprint application developer does not have to implement the solution themselves.

Creating a Blueprint Module

It is not hard to create a Blueprint module. First, you need to create a standard Blueprint application.

blueprint new [name]

After the Blueprint application is created, add blueprint-module to the keywords property in the generated packaged.json file. Now, save the application and publish it using npm.

You have now created your first Blueprint module.

Loading Blueprint Modules

The Blueprint application automatically loads all Blueprint modules. It does so by using a postorder depth-first search of the dependencies defined in package.json, and loading all modules that have the keyword blueprint-module. This ensures that all dependencies are available to the parent module, or application, when it is loaded into memory.

When a Blueprint module is loaded into memory, the module is added to the Blueprint application and the entities in the Blueprint module are merged with the entities in the application. If an entity with the same type and name already appears in the application, it is overwritten. The overwritten entity, however, will still be accessible via the application. You just have to include the Blueprint module name when you are perform a lookup operation. For example

blueprint.lookup ('module-a:model:message');    // using lookup() method
blueprint.model ('module-a:message');           // using model() method 

Supported Entities

The following entities can be loaded from a Blueprint module into a Blueprint application:

• Controllers

• Listeners

• Models

• Policies

• Resources

• Routers

• Sanitizers

• Services

• Validators

Module Directory

The following is a list of know Blueprint modules.

Authentication

• ​Gatekeeper - Token-based authentication

Communication/Messaging

• ​Greenlock - Let's Encrypt support for free, automated SSLs

• ​Firebase Messaging - Google Firebase Messaging support

• ​Socket.IO - Socket.IO support

Data Models

• ​MongoDB - MongoDB support via Mongoose

Documentation

• ​Swagger UI - generate and view Swagger specification from application