base-domain

framework for Domain-Driven Design in JavaScript (or CoffeeScript, recommended.)

latest API documentation Page

installation

$ npm install -g base-domain

concept

base-domain helps easier practice of Domain-Driven Design.

1. list models in the domain of your concern (by your own way)
2. define models with base-domain
3. define their factories with base-domain
4. define their repositories with base-domain
5. define services with base-domain if needed

essential classes and relations

• Base
• Facade
• BaseModel
• BaseFactory
• BaseRepository
• BaseService
• Entity
• AggregateRoot
• ValueObject
• BaseList
• BaseDict

Base

API Doc

• Base is an origin of all classes
• Base has Facade
• Base does not have any other properties or methods

Facade

API Doc

• Facade is the gate of all classes
• Facade knows all classes
• Facade is module-exported in base-domain: require('base-domain') returns Facade class

BaseModel

API Doc

• BaseModel is a base class of model
• essential methods for model are defined
• BaseModel is a child of Base

BaseFactory

API Doc

• BaseFactory is a base class of factory
• BaseFactory creates specific BaseModel instance
• BaseFactory is a child of Base

BaseRepository

API Doc

• BaseRepository is a base class of repository
• BaseRepository connects to database, filesystem or other external data resources (settings needed).
• BaseRepository saves specific BaseModel to data resources
• BaseRepository read BaseModels from data resources
• BaseRepository has BaseFactory (to generate BaseModel from data resources)

ValueObject

API Doc

• ValueObject is child of BaseModel
• instance of ValueObject does not have id
• ValueObject.isEntity is false
• that's all of ValueObject

Entity

API Doc

• Entity is child of BaseModel
• instance of Entity has id
• Entity.isEntity is true

AggregateRoot

API Doc

• AggregateRoot is child of Entity
• AggregateRoot implements RootInterface, thus it can create other models, factories and repositories.

BaseList

API Doc

• BaseList is child of ValueObject
• BaseList has many BaseModels as items
• BaseList#items is array of specific BaseModel

BaseDict

API Doc

• BaseDict is child of ValueObject
• BaseDict has many BaseModels as items
• BaseDict#items is dictionary of key => specific BaseModel
• BaseDict.key is function to get key from item

usage

model definition

model is classified into "Entity" and "ValueObject"

Entity is model with id, ValueObject is model without id.

# {domain-dir}/hospital.coffee
class Hospital extends require('base-domain').Entity

    # property types
    @properties:
        name         : @TYPES.STRING
        address      : @TYPES.STRING
        beds         : @TYPES.NUMBER
        registeredAt : @TYPES.DATE
        isValidated  : @TYPES.BOOLEAN
        doctors      : @TYPES.MODEL 'doctor-list'
        flags        : @TYPES.MODEL 'flag-dict'
        state        : @TYPES.ENUM ['PREPARED', 'RUNNING', 'CLOSED']

module.exports = Hospital

properties definition

@TYPES.XXX is an object and also a function.

    @properties:
        aaa: @TYPES.STRING
        bbb: @TYPES.NUMBER 3
        ccc: @TYPES.MODEL 'foo-bar'

mark	property type	meaning	arg1	arg2
x	@TYPES.ANY	prop accepts any type	default value
x	@TYPES.STRING	prop is string	default value
x	@TYPES.NUMBER	prop is number	default value
x	@TYPES.DATE	prop is date	default value
x	@TYPES.BOOLEAN	prop is boolean	default value
x	@TYPES.ARRAY	prop is array	default value
x	@TYPES.OBJECT	prop is object	default value
x	@TYPES.BUFFER	prop is buffer	default value
x	@TYPES.GEOPOINT	prop is geopoint	default value
o	@TYPES.CREATED_AT	date set when first saved	default value
o	@TYPES.UPDATED_AT	date set each time saved	default value
o	@TYPES.MODEL	prop is BaseModel	model name	id prop name (if model is Entity)
o	@TYPES.ENUM	prop is index of the alternatives	alternatives	default value

Types with marked "x" just provide the name of the type. base-domain does not validate the prop's type.

factory definition

# {domain-dir}/hospital-factory.coffee
class HospitalFactory extends require('base-domain').BaseFactory

    @modelName: 'hospital'

module.exports = HospitalFactory

repository definition

# {domain-dir}/hospital-repository.coffee
class HospitalRepository extends require('base-domain').BaseRepository

    @modelName: 'hospital'

module.exports = HospitalRepository

use them by facade

domain = require('base-domain').createInstance
    dirname: '/path/to/domain-dir'


Hospital = domain.getModel('hospital')
hospitalFactory = domain.createFactory('hospital')
hospitalRepository = domain.createRepository('hospital')

hosp = hospitalFactory.createFromObject(name: 'Suzuki Clinic')


hospitalRepository.query(where: name: 'CureApp Hp.').then (hospitals)->
    console.log hospitals

list definition

# {domain-dir}/hospital-list.coffee
class HospitalList extends require('base-domain').BaseList

    @itemModelName: 'hospital'

module.exports = HospitalList

dict definition

# {domain-dir}/hospital-dict.coffee
class HospitalDict extends require('base-domain').BaseDict

    @itemModelName: 'hospital'
    @key: (item) -> item.id

module.exports = HospitalDict