This document discusses various software design patterns for building applications using Node.js frameworks. It begins by introducing the author and their background in software architecture. It then examines early "natal" Node.js patterns like callbacks and modules. Several popular frameworks like Express, Hapi and LoopBack are evaluated. The document also covers emerging patterns like microservices and mobile backend as a service (mBaaS). It argues that APIs and decomposing monolithic applications into independent services will be increasingly important patterns to address the needs of mobile and IoT development.

1. Shubhra Kar | Products & Education
twitter:@shubhrakar mail:skar@strongloop.com
Frameworks or a Design Pattern ?

2. About me
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u J2EE and SOA architect – Infosys
u Performance architect – Wily à CA
u Node, mBaaS and API stacks - StrongLoop

3. These guys sent me !
Bert
Belder
Ben
Noordhuis
Node Core
Raymond
Feng
Ritchie
Martori
LoopBack / Express Core
Sam
Roberts
Miroslav
Bajtos
Ryan
Graham
Plus 15 other full-time open source
developers working on Node.js core,
modules and tools.
Contributing to over 100 open source
modules.
Supporting banks, retail, IoT companies,
startups and internet companies on Node.js

5. Patterns evolve to serve
market needs; not opinions
Thick
Web
SaaS
Mobile
IoT

6. The new curve: Innovate or Die
10
25
50
100100
50
10
15
40
100
25
Web SaaS Mobile IoT
The new curve
Concurrent Users Latency Adoption
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7. Pattern 0: Natal patterns
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Philosophy: KISS (Keep It Simple Stupid)
u small core
u small modules
u small surface area
Patterns
u reactor
u callback
u module
u observer

8. Pattern 1: Convention
Web Middleware REST API

9. Pros and Cons
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u Pseudo-Opinionated, Express and Restify are DIY
u Middleware
u Strengths
u Express: Web templating, ecosystem
u Restify: REST API
u Low learning curve
u Restify: Dtrace and SPDY Support
u Weakness
u Manual CRUD
u Manual recursive Testing/Refactoring

10. Router
in
Express
StrongLoop
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and
Proprietary
Informa.on
–
©
2015

11. Pattern 2: Configuration
u Opinionated
u Configuration over
Convention
u Granular HTTP/Webserver
control
u Good plug-in ecosystem
u Supported and well
documented
u Weakness
u Manual CRUD/Refactor/
Testing
u No plug & play with
Express ecosystem
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Web Middleware

12. Router
in
hapi
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and
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–
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2015

13. Pattern 3 : Full Stack JS
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{“..”} JSON is the new first class citizen

14. Pattern 4: ORM & Isomorphic JS
u Model Driven Development
u Any data source
u Isomorphic JS
u Omni-Channel
u Share Models (Client/Server)
u Loopback & Meteor
u Automatic REST API
generation, routing, etc
u Weakness
u Higher learning curve
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15. ORM & Isomorphic JS – Loopback.io
JS
client
JS
Server
Remoting
JS
client
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Developer SDKs

16. Router &
Swagger
in Loopback
StrongLoop
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and
Proprietary
Informa.on
–
©
2015

17. API Economy driven by Mobile / IoT
Mobile
and
IoT
explosion
u Sheer
number
of
clients
has
increased
u Clients
are
increasingly
sophis.cated
u Node.js
is
the
plaHorm
of
choice
for
these
API
StrongLoop
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and
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2015

18. StrongLoop Confidential and Proprietary Information – © 2015
mobile/web
clients
social &
analytics
JSON API
API
XML
SQL
SOAP
Etc.
mBaaS
Mobile API tier
Enterprise
Pattern 5: mBaaS

19. mBaaS could be on cloud or premises
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u Closed Source / Commercial
u Open Source
Key API
u Push Notification
u Geo Location
u Offline Sync
u Storage
u User Management
u Metering, Analytics
u Native SDK
u Isomorphic JS

20. REST
API
PUSH
GEO
OFF
SYNC
DEVICE
USER FILE
Relational Database Clustered Database Security Gateway Cloud
Laptop ( not requested but useful)
Connections
Tablet Phone IoT SDK API SERVER
Quick Example of Use
App S
Add
App Server
Storage
Relational Database Clustered Database Security Gateway Cloud Firewall SOA Bus ( not sure on this one)
Laptop ( not requested but useful)
Connections
Tablet Phone IoT SDK API SERVER Items for ACL
Quick Example of Use
App Server
Add On
App Server
REST
API
GATEWAY
Channel SDKs
API ENGINE
C
O
N
N
E
C
T
O
R
s
A
P
I
S
D
K
s
Open Source ORM, mBaaS and API framework
REST API
atabase Security Gateway Cloud Firewall SOA Bus ( not sure on this one)
Phone IoT SDK API SERVER Items for ACL
Quick Example of Use
App Server
Add On
App Server
API
Explorer

21. GeoLocation in Loopback

22. Is micro services a pattern too ?
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Not just infrastructure virtualization !

23. API “Re-Composition” is good…
Relational Database Clustered Database Security Gateway Cloud
Laptop ( not requested but useful)
Connections
Tablet Phone IoT SDK API SERVER
Quick Example of Use
App Server
Relational Database Clustered Database Security Gateway
Laptop ( not requested but useful)
Connections
Tablet Phone IoT SDK
Quick E
App Server
Auth
Routing
Rate-Limit
Proxy
Mediation
Orchestration
Analytics
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24. Why not an API Gateway pattern ? Pattern 6
Security & Social Logins
Marquee – Auth, Routing, Throttling, Proxy, Mediation, Aggregation, Virtualization
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25. The need is “DE-COMPOSITION”
SaaS Mobile IoTWeb
App Server API Server
HTML JSON
{JSON}
{JSON}
{JSON}<SOAP/XML>
<TABLE>
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26. Pattern 7: Micro-services (Design Time)
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27. StrongLoop Confidential and Proprietary Information – © 2015
Pattern 8: Micro-services (Run Time)

28. Now I know !!!

29. A Shameless Plug…
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31. First there was Node
Thank you!
JUST WIN,
BABY!