nstrap

nstrap

nstrap is a bootstrap library which allows you to start your application with less overhead and an unified interface. You are welcome to contribute to this repository or create some third-party modules like nstrap-mongoose.

Note: This module is marked as under development.

Table of Contents

• Install
• API Reference
• Quick start
• Create your own NStrap module
• License

Install

npm i --save nstrap

API

add(name[, dependencies[, task]])

• name: The name of the task as a string or an instance of NStrapModule.
• dependencies: An optional array passed as the second argument which defines the dependencies for this task. The task gets called once all dependencies are fulfilled.
• task: The task as a function. The function takes an argument called done which should be called by the task once it is completed. The argument passed to done can be anything - it will be appended to the nstrap registry to access the data. If you pass an Error the task is marked as invalid. Note that you can also use a Promise library (preferred: bluebird).

addModule(module)

• module: An instance of NStrapModule.

Example

var bootstrap = require('nstrap')();

bootstrap.add('config', function (done) {
  done(require('path/to/my/config'));
});

bootstrap.add('database', function () {
  return new Promise(function (resovle) {
    resolve({ connected: true });
  });
});

bootstrap.add({
  name:     'mysql',
  provider: function (instance) {
    instance.add('mysql:config', function () {
      return {
        host: '',
        user: '',
        pass: '',
        db:   ''
      };
    });
  },
  dependencies: ['mysql:config'],
  task: function (config, done) {
    done({
      connectedTo: config
    });
  }
});

bootstrap.run()
  .then(function (kernel) {
    kernel.database.connected; // true
    kernel.config; // the configuration `path/to/my/config`
  })
;

get(name)

• name: The name of the required module.

Quick start

var bootstrap = require('nstrap')(),
    mongoose  = require('mongoose');

bootstrap.add('config', function (done) {
  done(require('path/to/your/config'));
});

bootstrap.add('database', ['config'], function (config) {
  return new Promise(function () {
    var connection = mongoose.connection;

    mongoose.model('Cat', { name: String });

    connection.once('error', reject);
    connection.once('open', resolve);

    mongoose.connect(config.database);
  });
});

bootstrap.add(require('nstrap-mysql')({
  name: 'database2'
}));

bootstrap.run()
  .then(function (globals) {
    return mongoose.model('Cat').find({});
  })
  .then(function (cats) {
    cats.forEach(function (cat) {
      console.log('Hi', cat.name);
    });
  })
;

Create your own NStrap module

nstrap comes with a simple interface called NStrapModule to provide own modules.

var NStrapModule = require('nstrap').NStrapModule;

module.exports = function example() {
  var example = new NStrapModule();

  example
    .setName('example')
    .setSupplier(function (instance) {
      instance.add('example:config', function () {
        return { name: 'Jon Doe' };
      });
    })
    .addDependency('example:config')
    .setTask(function (config) {
      return new Promise(function (resolve, reject) {
        resolve('Hi ' + config.name);
      });
    })
  ;

  return example;
};

To test your module you can simply call the isValid function. The function returns true or an instance of Error with additional information about the behaviour.

License

The MIT License (MIT)

Copyright (c) 2015 Marc Binder [e-mail]

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.