Download as KEY, PPTX
![using modules
var _ = require("underscore");
var threes = _.map([1, 2, 3], function(n){ return n*3 });
console.log( threes );
// prints [3, 6, 9]
var mongo = require('mongodb');
var host = 'localhost';
var port = 27017;
var db = new mongo.Db( 'mydatabase',
new mongo.Server(host, port, {}), {});
db.open(function(err, db) { ... }](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/85/Introducing-the-Seneca-MVP-framework-for-Node-js-10-320.jpg)
![package.json
{
"name" : "optimist",
"version" : "0.3.4",
"description" : "Light-weight option parsing.",
"main" : "./index.js",
"dependencies" : {
"wordwrap" : ">=0.0.2"
},
"repository" : {
"type" : "git",
"url" : "http://github.com/substack/node-optimist.git"
},
"keywords" : [ "argument", "args", "option", "parser" ]
"author" : { "name" : "James Halliday" },
"engine" : { "node" : ">=0.4 }
}](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/85/Introducing-the-Seneca-MVP-framework-for-Node-js-16-320.jpg)
![seneca data model
var product = seneca.make('product');
product.name = 'Apple';
product.price = 1.99;
product.save$(function(err,savedproduct){
console.log('generated id: '+savedproduct.id);
})
product.load$('1234',function(err,foundproduct){
console.log('found product '+foundproduct);
})
product.list$( {price:1.99}, function(err,list){
for( var i = 0; i < list.length; i++ ) {
console.log( list[i] );
}
})](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/85/Introducing-the-Seneca-MVP-framework-for-Node-js-30-320.jpg)
![using modules
var _ = require("underscore");
var threes = _.map([1, 2, 3], function(n){ return n*3 });
console.log( threes );
// prints [3, 6, 9]
var mongo = require('mongodb');
var host = 'localhost';
var port = 27017;
var db = new mongo.Db( 'mydatabase',
new mongo.Server(host, port, {}), {});
db.open(function(err, db) { ... }](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/75/Introducing-the-Seneca-MVP-framework-for-Node-js-10-2048.jpg)
![package.json
{
"name" : "optimist",
"version" : "0.3.4",
"description" : "Light-weight option parsing.",
"main" : "./index.js",
"dependencies" : {
"wordwrap" : ">=0.0.2"
},
"repository" : {
"type" : "git",
"url" : "http://github.com/substack/node-optimist.git"
},
"keywords" : [ "argument", "args", "option", "parser" ]
"author" : { "name" : "James Halliday" },
"engine" : { "node" : ">=0.4 }
}](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/75/Introducing-the-Seneca-MVP-framework-for-Node-js-16-2048.jpg)
![seneca data model
var product = seneca.make('product');
product.name = 'Apple';
product.price = 1.99;
product.save$(function(err,savedproduct){
console.log('generated id: '+savedproduct.id);
})
product.load$('1234',function(err,foundproduct){
console.log('found product '+foundproduct);
})
product.list$( {price:1.99}, function(err,list){
for( var i = 0; i < list.length; i++ ) {
console.log( list[i] );
}
})](https://image.slidesharecdn.com/20120816-nodejsdublin-120820050259-phpapp01/75/Introducing-the-Seneca-MVP-framework-for-Node-js-30-2048.jpg)
Uploaded byRichard Rodger
Introducing the Seneca MVP framework for Node.js
The document discusses starting a Node.js community project called Seneca. Seneca is described as a toolkit that allows building a startup minimum viable product in a weekend. It encourages participants to sign up via Twitter or email and contribute code to the GitHub repository. The document provides an overview of Node.js modules and how to create, publish and use them as part of developing the Seneca project.
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Introducing the Seneca MVP framework for Node.js
- 1. seneca nodejsdublin 16 August2012 Richard Rodger @rjrodger
- 2. hello nodejsdublin • let'sstart a community project • how Node.js modules work • introducing the seneca module
- 3. getting started • how do you learn Node.js? • how do you contribute to Node.js? • how do you get a job doing Node.js?
- 4. your community • nodejsdublin isfor you • here to help you learn • here to build a great community
- 5. let's start aproject • less talking, more coding! • community project with many coders • something with lots of small pieces
- 6. seneca • A MinimalViable Product toolkit • let's you build a startup in a weekend :) • for more about MVPs: http://bit.ly/N25FlZ
- 7. • Lucius AnnaeusSeneca, 4 BC – AD 65 • You have to be stoic to do a startup • "increases are of sluggish growth, but the way to ruin is rapid" * http://cassandralegacy.blogspot.ie/2011/08/seneca-effect-origins-of-collapse.html
- 8. sign up • Tweet@nodejsdublin with #seneca • Mail me: richard.rodger@nearform.com • Code: github.com/nodejsdublin/seneca
- 9. node.js modules • basic building blocks of Node.js apps • no special syntax; plain old JavaScript • no version conflicts!
- 10. using modules var _= require("underscore"); var threes = _.map([1, 2, 3], function(n){ return n*3 }); console.log( threes ); // prints [3, 6, 9] var mongo = require('mongodb'); var host = 'localhost'; var port = 27017; var db = new mongo.Db( 'mydatabase', new mongo.Server(host, port, {}), {}); db.open(function(err, db) { ... }
- 11. cool modules • express - JSP/ASP style dynamic server-side pages • socket.io - HTML5 real-time web sockets that "just work" • request - easy outbound calls to web services
- 12. using npm • npmjs.org- module repository of record • usage: npm install modulename • modules live in local node_modules folder
- 13. how to pick a module • serious modules are on https://github.com/joyent/node/wiki/modules • popularity! check watchers/issues on github • documentation, including third party blogs • ask the community: http://nodejs.org/community/
- 14. why npm rocks • modules are installed separately for each project • dependencies are also installed separately • no global conflicts, no cross-dependency conflicts
- 15. package.json • definesa module; lists dependencies • always create one for each project • npm install will set up dependencies for you!
- 16. package.json { "name" : "optimist", "version" : "0.3.4", "description" : "Light-weight option parsing.", "main" : "./index.js", "dependencies" : { "wordwrap" : ">=0.0.2" }, "repository" : { "type" : "git", "url" : "http://github.com/substack/node-optimist.git" }, "keywords" : [ "argument", "args", "option", "parser" ] "author" : { "name" : "James Halliday" }, "engine" : { "node" : ">=0.4 } }
- 17. write a module • create a project on github • npm init - creates package.json for you • start with lib/modulename.js
- 18. modulename.js "use strict"; function ModuleName(){ var self = {}; var private = "hidden"; self.member = "data"; self.method = function() { ... }; return self; } exports.ModuleName = ModuleName callingcode.js var modulename = require('modulename') var instance = new modulename.ModuleName()
- 19. parambulator • written just for this meetup! - sanity checks JSON data structures • https://github.com/rjrodger/parambulator • you also need a README.md and LICENSE.txt • you really should have unit tests; try the vows module
- 20. file structure parambulator / package.json README.md LICENSE.txt lib / parambulator.js
- 21. publishing a module • the package.json files property is your friend • register for an account on npmjs.org • npm publish • sit back and bask in the glory...
- 22. seneca • nearForm buildsweb/mobile services • shared set of features every startup needs • ... must resist ... let's build a framework!
- 23. shared features • user accounts: login/logout, profile pages, social media, ... • email: transactional, promotional, ... • e-commerce: gateways, app stores, ... • admin: data editors, analytics, audit logs, ..
- 24. seneca is in production businesspost.ie chartaca.com stanzr.com
- 25. command pattern • actions are represented by a set of properties • seneca "executes" them by invoking plugins • everything that happens is traceable • business logic is insulated from service providers
- 26. seneca commands // registera new user seneca.act({ on: 'user', cmd: 'register', email: 'alice@example.com', name: 'Alice', password: '1234', active: true }, function(err, result) { ... }) // send an email seneca.act({ on: 'email', cmd: 'send', to: 'alice@example.com', code: 'thanks-for-registering', fields: {name:'Alice'} }, function(err, result) { ... })
- 27. plugins • everything isa plugin • plugins provide actions • plugins are just modules!
- 28. seneca plugin function EchoPlugin(){ var self = {}; self.name = 'echo'; self.init = function(seneca,opts,cb) { seneca.add({on:'echo'}, function(args,seneca,cb){ var out = args cb(null,out) }) cb() } self.service = function() { return function(req,res,next){ if( '/echo' == req.url ) { res.writeHead(200); res.end(req.url); } else next(); } } } exports.plugin = function() { return new EchoPlugin() }
- 29. shared data model • Built-inODM - Object Document Mapper • You need this to stay sane • ActiveRecord-ish API with MongoDB-ish queries
- 30. seneca data model varproduct = seneca.make('product'); product.name = 'Apple'; product.price = 1.99; product.save$(function(err,savedproduct){ console.log('generated id: '+savedproduct.id); }) product.load$('1234',function(err,foundproduct){ console.log('found product '+foundproduct); }) product.list$( {price:1.99}, function(err,list){ for( var i = 0; i < list.length; i++ ) { console.log( list[i] ); } })
- 31. what we • havenow messy code that kinda sorta works • a few hackety hack plugins • no documentation!
- 32. what we need • plugins! plugins! plugins! • documentation ( ... just kidding! I'll do that) • some nodeknockout.com entries - November 10-12th! Fame & Glory Await!
- 33. let's code! • Tweet@nodejsdublin with #seneca • Mail me: richard.rodger@nearform.com • Code: github.com/nodejsdublin/seneca
Editor's Notes
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- #6 ...and here's one we made earlier\n
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- #8 nero\nseneca squeezes the curve\n\n
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- #13 intro npm, installed with node\n
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- #19 explain var self = {}\n
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- #25 about a year old\n
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