Building Your First App with MongoDB Stitch

#MDBlocal
MongoDB Stitch Introduction
Drew DiPalma, Product Manager

#MDBlocal
When building, you need to…
1. Safely and easily access data
2. Integrate with key services
3. Scalably serve requests

#MDBlocal
MongoDB Query Language + Native DriversIntegrated Rules
Functions3rd Party Services
Native SDKs (JavaScript, Android, iOS)
Rest-like API

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Integrated services and
Functions for complex,
connection logic
Native SDKs for Android,
JS, and iOS clients
Direct Database
Access

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How requests work…
1. Application request is made
1

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2. Stitch parses and applies rules
2

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3. Stitch orchestrates DB + Services
3
3

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4. Stitch aggregates and applies rules
4

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4. Stitch aggregates and applies rules
5. Client receives results 5

const stitch = require('mongodb-stitch');
let client, mongodb, coll, users;
stitch.StitchClientFactory
.create('APP-ID')
.then(stitchClient => {
client = stitchClient;
mongodb = client.service('mongodb', 'mongodb-atlas');
coll = mongodb.db('Demo').collection(’Users');
});
MongoDB Services Functions
Stitch Concepts

client.login().then(() => {
// You can use client.authenticate() to access other auth providers
client.authenticate('providerType', {options})
// Providers include:
// - Anonymous
// - Email/Password
// - Facebook
// - Google
// - API Keys
// - Custom (signed JWT)
Stitch Concepts

client.login().then(() => {
coll.find({'city': 'Seattle'}).execute().then(docs => {
users = docs;
});
});
// Or execute almost any find/aggregate command
coll.find({'city': 'Seattle'})
.aggregate([…])
.count(…)
.deleteMany(…)
.deleteOne(…)
.insertMany(…)
.insertOne(…)
.updateMany(…)
.updateOne(…)
Stitch Concepts

const twilioService = client.service('twilio', 'twilioService')
twilioService.send('+120155555553', '+12018675309', message)
const sesService = client.service('ses', 'sesService')
sesService.send(fromEmail, toEmail, message)
const s3Service = client.service('s3', 's3Service')
s3Service.put(bucket, key, acl, contentType)
Stitch Concepts

#MDBlocal
• Scalable, hosted JavaScript functions
• Written using ECMAScript 5
• Easily incorporate application context
- context.values
- context.services
- context.user
- context.request
- context.functions
- context.utils
Stitch Functions

client.executeFunction('sendWeather', 'Seattle');
Stitch Concepts

client.executeFunction('sendWeather', 'Seattle');
Stitch Concepts
//Function sendweather
exports = function(city) {
var mongodb = context.services.get("mongodb-atlas");
var UserColl = mongodb.db("StitchDemo").collection("Users");
var twilio = context.services.get("twilio");
var weather = context.services.get("weatherAPI");
var users = UserColl.find({"city": city});
var forecast = weather.get({context.values.get("weatherURL") + city});
var statuses = [];
for(var i in users){
statuses.push(twilio.send(context.values.get("twilioPhone")), users[i].Phone, forecast);
}
return statuses;
}

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• Control DB/Service/Function access
• Fine-grained data access controls
• Define with simple JSON or link to
functions
• Associate with user profile, MDB Data,
or external info
Declarative Access Controls

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Atlas
Customer Account Data
{
"owner_id": … ,
"balance": … ,
"transactions": {…},
"user_profile": {….}
}Bank
Teller
Analys
t
Custome
r
Roles,Permissions,andSecurity
Application
Reporting Data Mart
User Profile:
“I need to access my account”
Role Based:
“I need to lookup transactions
without seeing personal information”
Aggregate Only:
“I need to understand the bank’s total
cash flow”

#MDBlocal
Bank
Teller
Analys
t
Custome
r
Atlas
{
"owner_id": … ,
"balance": … ,
}
Stitch
user_profile
(Read Rule)
{”owner_id": ”%%user.id"}
balance/transactions
(Read Rules)
{
”%or": [
{”owner_id": ”%%user.id"},
{"%%true": { "%function":
{ "name": ”isTeller",
"args": []
}
]
}
{
"user_id": … ,
"balance": … ,
"transactions":
{…},
}

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Stitch
user_profile
(Read Rule)
(Read Rules)
{
”%or": [
"args": []
}
]
}
Bank
Teller
Analys
t
Custome
r
Atlas
{
"owner_id": … ,
"balance": … ,
}
{
"user_id": … ,
"balance": … ,
"transactions": {…}
}

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Stitch
user_profile
(Read Rule)
(Read Rules)
{
”%or": [
{"%%true": { "%pipeline":
{ "name": "CheckAuth",
"args": { "AuthType": "server",
"UserAuth": "%%user.type"}
}
]
}
Stitch
user_profile
(Read Rule)
(Read Rules)
{
”%or": [
"args": []
}
]
}
Bank
Teller
Analys
t
Custome
r
{Aggregated
Data}
Stitch
Function for Analysis
{
"%%true": { "%function":
{ "name": ”isAnalyst",
"args": []}
}
Atlas
{
"owner_id": … ,
"balance": … ,
}

#MDBlocal
Amazon S3 MongoDB
Atlas
twilio Amazon
Rekognition
2FA Access Control with Stitch
Secure IoT Client
• Bi-directional communication
• Secure com via API key auth
• Device access to DB,
functions and Services
Complex, Scalable Backend
• Deeply integrated services
• Coordination logic via
Functions
• Security through Auth + Rules
• Elastic scale

#MDBlocal
MongoDB
Atlas
Twilio
Amazon
Rekognition
{key: “*”}
capture_image()
{match: Drew,
Prob: 99.0%}
{user: “Drew”,
Ph#: 555-1212}
{user: Drew,
OTP: 135}
{user: Drew,
OTP: 135}
Ph#: 555-1212
{Ph#: 555-1212,
OTP: 135}
{OTP: 135}
{OTP: 135}
Amazon S3
process:
1. User requests photo + SMS
entry
2. Stitch asks ElectricImp for
photo
3. EI takes photo, sends to
Stitch
4. Stitch sends the photo to
AWS S3 and Rekognition
5. Rekognition sends image
analysis
6. Stitch queries Atlas for User
7. Stitch generates an entry
code, writes log, sends text
via Twilio
8. User enters code with key
pad, ElectricImp sends to
Stitch
9. Stitch checks code against
logs
10. If the code is valid, the Stitch
sends Electric Imp a message
to unlock.

#MDBlocal
Add Features
• Take your app to a
new platform
• Build a better
permissions
system or a
separate admin
portal
• Add additional
authentication
providers
Expose Data
• Provide an API for
safe, internal data
access
• Build more precise
permissions
system
• Create a real-time
dashboard with
authentication and
security built-in
Integrate Services
• Integrate with any
service or API with
minimal code
• Consume/action on
data in real time
with webhooks
• Communicate with
data using text,
e-mail, etc.
Complete
Backend
• Build faster without
boilerplate code
• Easily span multiple
platforms
• Scale at a moments
notice
• Single, simplified
point to manage
infrastructure/logic

#MDBlocal
• $1 per GB of data transferred from Stitch to client/service
• 25 GB Free per month
• Data transfer to Atlas is free
Pricing

#MDBlocal
xx
Everywher
e
Expand Regional footprint
Available on-premise
Bring any MongoDB
Realtime
Change Streams
driven
Event-based functions
Improve
Dev
App Import/Export Tools
User/Log Management
Rules Usability
What’s Next?

#MDBlocal
• Check out our hands-on lab: 12:50PM in the Sound Room
• Try out Stitch – stitch.mongodb.com
• Check out SDKs and examples
• Code at github.com/MongodbStitch
• Docs at docs.mongodb.com/stitch
• Build the Dashboard or Weather IoT apps in our Tutorials section
• Ask Questions or let us know what you’re building through Intercom
What Now?

#MDBlocal
THANK YOU
FOR JOINING!

Building Your First App with MongoDB Stitch

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