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node-cqs

v0.7.2

Published

Node-cqs is a node.js module that implements the cqrs pattern without eventsourcing. It can be very useful as domain and eventdenormalizer component if you work with (d)ddd, cqrs, host, etc.

Downloads

152

Readme

Introduction

travis npm

Node-cqs is a node.js module that implements the cqrs pattern without eventsourcing. It can be very useful as domain and eventdenormalizer component if you work with (d)ddd, cqrs, host, etc.

Installation

$ npm install node-cqs

Usage

Initialization

var cqs = require('node-cqs').cqs;

cqs.on('event', function(evt) {
    // send to clients
});
cqs.initialize({
    commandHandlersPath: __dirname + '/commandHandlers',
    aggregatesPath: __dirname + '/aggregates',
    sagaHandlersPath: __dirname + '/sagaHandlers',
    sagasPath: __dirname + '/sagas',
    viewBuildersPath: __dirname + '/viewBuilders',
    extendersPath: __dirname + '/eventExtenders',
    disableQueuing: false
}, function(err) {

});

cqs.handle({ id: 'msgId', command: 'changeDummy', payload: { id: '23445' } }, function(err) {

});

Define aggregates...

var base = require('node-cqs').aggregateBase;

module.exports = base.extend({

    changeDummy: function(data, callback) {
        this.apply(this.toEvent('dummyChanged', data));

        this.checkBusinessRules(callback);
    },

    destroyDummy: function(data, callback) {
        this.apply(this.toEvent('dummyDestroyed', data));

        this.checkBusinessRules(callback);
    },

    cancelDummy: function(data, callback) {
        this.apply(this.toEvent('dummyCancelled', data));

        this.checkBusinessRules(callback);
    },

    dummyChanged: function(data) {
        this.set(data);
    },

    dummyCancelled: function(data) {
        this.set('cancelled', true);
    },

    dummyDestroyed: function(data) {
        this.set('destroyed', true);
    }

});

Define eventdenormalizers...

var base = require('node-cqs').eventDenormalizerBase;

module.exports = base.extend({

    events: [
        'dummied',
        {
            event: 'dummyCreated',
            method: 'create',
            viewModelId: 'payload.id'
        },
        {
            event: 'dummyChanged',
            method: 'update',
            payload: 'payload'
        },
        {
            event: 'dummyDeleted',
            method: 'delete'
        },
        'dummySpezi',
        'somethingFlushed'
    ],

    collectionName: 'dummies',

    dummied: function(data, vm, evt) {
    },

    dummySpezi: function(data, vm, evt) {
        vm.otherValue = 'value';
    },

    somethingFlushed: function(data, vm, evt) {
    }

});

See tests for detailed information...

Release notes

License

Copyright (c) 2014 Adriano Raiano

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.