MongoDB and Node.js

1. MongoDB + Node.js Building first app with MongoDB and Node.js

2. 2 Agenda MongoDB + Node.js Driver ODM's MEAN Stack Meteor

3. 3 Ola, I'm Norberto! Norberto Leite Technical Evangelist Madrid, Spain @nleite [email protected] http://www.mongodb.com/norberto

4. MongoDB Node.js

5. INFACT

6. MongoDB JavaScript

7. 7 Few reasons why Flexible Agile Web Language

8. 8 MongoDB + Javascript •  MongoDB Shell –  JS interperter •  MongoDB MapReduce –  Runs on top of V8 –  Map and Reduce functions are JS functions •  Native support for Node.js –  One of the most used Drivers out there! –  https://www.npmjs.com/package/mongodb

9. Node.js

10. 10 2 Foundations Events Streams

11. 11 2 Foundations •  Events / Event Loop –  Single Thread Applications –  No threads –  Events Emitter –  Event Queue –  Known Events •  Streams –  Read, Write, Both –  Unix Pipes –  We use it extensively!

12. Install

13. npm package $ npm install mongodb

14. Compatibility http://docs.mongodb.org/ecosystem/drivers/node-js/#compatibility

15. 15 Compatibility w/ MongoDB

16. Initialize Project

17. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init

18. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [http://docs.mongodb.org/ecosystem/drivers/node-js/#compatibility "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"

19. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [ "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"

20. Install our new firstappnodejs app! $ npm install > [email protected] install … … > [email protected] install > [email protected] node_modules/mongodb ├── [email protected] ([email protected], [email protected], [email protected], [email protected]) └── [email protected] ([email protected], [email protected]) firstappnodejs/ $ ls node_modules package.json

21. Connect

22. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb

23. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced

24. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced

25. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); Connect

26. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" Connect

27. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" //connect to MongoDB MongoClient.connect(uri, function(err, db){ assert.equal(null, err); console.log("Connected correctly to server"); db.close(); }); Connect

28. 28 Connection Pooling •  No traditional Pooling mechanism –  Single thread process •  Sockets to pipeline operations •  Failover –  Buffering up operations –  bufferMaxEntries –  numberOfRetries –  retryMiliSeconds http://mongodb.github.io/node-mongodb-native/2.0/api/Db.html

29. CRUD

30. var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert

34. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert

35. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert

36. var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update

40. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now update!"); updateDocuments(db, function() { db.close(); }); }); Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update

41. Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove

44. Remove MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now delete!"); removeDocuments(db, function() { db.close(); }); }); http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove

45. Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find

48. Flexibility

49. Schema Flexibility

50. Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/

51. Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/

52. WriteConcerns

53. WriteConcern w:1

54. WriteConcern w:2

55. WriteConcern j:true

56. Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html

57. Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html

58. Read Preference

59. 59 Read Preference •  Read from Primary (default) ReadPreference.PRIMARY •  Read from Primary Preferably ReadPreference.PRIMARY_PREFERRED •  Read from Secondary ReadPreference.SECONDARY •  Read from Secondary Preferably ReadPreference.SECONDARY_PREFERRED •  Read from Nearest Node ReadPreference.NEAREST http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html

60. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html

61. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html

62. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {readPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html

63. Aggregation

64. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate

67. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$match:{"age": $gt: 18}}, {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, {$project:{"ID": "$_id", "average": "$avg_age" }} ]; var cursor = coll.aggregate(pipeline); var coll = db.collection("users"); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); });} http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate

68. ODM's

69. Mongoose

70. 70 Mongoose •  Schema Validation •  Casting •  Business Logic Wrapper •  http://mongoosejs.com/

71. Simple Mongoose var mongoose = require('mongoose'), assert = require('assert') var Schema = mongoose.Schema; //define a schema var userSchema = new Schema({ name: String, age: Number}) //create static members userSchema.statics.findByName = function( name, cb){ return this.find( {"name": name}, cb); } …

72. Simple Mongoose … //generate a model var User = mongoose.model('User', userSchema); //initiate the new user, validates the given arguments var u1 = User({name:"Many Delgado", age:14}); //just save it u1.save(function(err){ assert.equal(null, err); });

73. 73 Other Projects Project Repository MongoSkin https://github.com/kissjs/node-mongoskin Mongolia https://github.com/masylum/mongolia Mongojs https://github.com/mafintosh/mongojs MongoSmash https://github.com/bengl/mongosmash

74. MEAN Stack

75. 75 MEAN Stack •  MongoDB •  Express.js •  Angular JS •  Node.js

76. Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.

77. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop

78. Building your first app with MongoDB: Creating a RESTAPI using the MEAN Stack https://www.mongodb.com/blog/post/building- your-first-application-mongodb-creating-restapi-using-mean-stack-part-1

79. Meteor

80. Meteor is a complete open source platform for building web and mobile apps in pure JavaScript.

81. 81 Meteor •  Responsiveness •  Reactiveness •  Multiplatform •  Unified Package System •  Hot Deploys https://www.meteor.com/try

82. METEOR: Build IOS andAndroidApps that are a delight to use http://www.mongodb.com/blog/post/meteor- build-ios-and-android-apps-are-delight-use

83. Recap

84. 84 What we talked about today… •  Node.js is a very productive language –  Our driver is highly adopted –  Updated –  Fully compatible •  CRUD Operations –  Insert, Update, Remove, Delete •  Write Concerns –  Flexible to write •  Read Preferences –  Flexible to read •  Aggregation Framework –  Analytics at your fingertips

85. 85 Large Ecosystem •  Mongoose •  Mean Stack •  Meteor •  Many other projects

86. 86 Where to next? •  Questions on the driver: –  https://groups.google.com/forum/#!forum/node-mongodb-native •  Issues: –  https://jira.mongodb.org/browse/NODE/? selectedTab=com.atlassian.jira.jira-projects-plugin:summary- panel •  Tutorial: –  http://mongodb.github.io/node-mongodb-native/2.0/ •  Todays code: –  https://github.com/nleite/firstappnodejs •  Other: –  http://www.mongodb.com/norberto

87. 87 For More Information Resource Location Case Studies mongodb.com/customers Presentations mongodb.com/presentations Free Online Training education.mongodb.com Webinars and Events mongodb.com/events Documentation docs.mongodb.org MongoDB Downloads mongodb.com/download Additional Info [email protected] Blog blog.mongodb.com

88. 88 Register now: mongodbworld.com! ! Use Code NorbertoLeite for additional 25% Off! *Come as a group of 3 or more – Save another 25%!

89. http://cl.jroo.me/z3/v/D/C/e/a.baa-Too-many-bicycles-on-the-van.jpg Questions? @nleite [email protected] http://www.mongodb.com/norberto

MongoDB and Node.js

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