The document discusses the benefits of using a polyglot approach to application development. It argues that a single technology or programming language is no longer suitable for modern applications given the variety of data types, need for scalability, and rapid pace of change. The document provides examples of when different programming languages may be better suited to different tasks, such as using Node.js for real-time interactions, Scala for data processing, and JavaScript for querying. It advocates choosing the right tool based on factors like maturity, features, learning curve, and productivity.

1. Proud to be Polygot!
Tugdual “Tug” Grall
@tgrall
Technical Evangelist at
Wednesday, November 6, 13
.

2. {about : “me”}
• Tugdual “Tug” Grall
­ Couchbase
­ Technical Evangelist
­ eXo
­ CTO
­ Oracle
­ Developer/Product Manager
­ Mainly Java/SOA
­ Developer in consulting firms
Wednesday, November 6, 13
• Web
­
@tgrall
­
http://blog.grallandco.com
­
tgrall
­ NantesJUG co-founder
­ Pet Project :
­ http://www.resultri.com
­ tug@couchbase.com
­ tugdual@gmail.com

3. Modern Applications
• Modern Applications Must
­ Manage any type of data
­ Scale
­ Be fault
tolerant
­ Adapt to change
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4. Standard Architecture
• Mono-Technology
­ Same “language/architecture”
­ Single Database : RDBMS
• One size fits all approach
Wednesday, November 6, 13
JSP/JSF
Services
Messaging
JTA
DAO/JPA

5. Is it good for me?
• Many files
- XML, Sources, ..
• Hibernate/JPA is good for all?
- Impedance mismatch
• Need to scale
- from 0 to 50millions users in
6 weeks (real life)
- can I do that easily with such
architecture?
Wednesday, November 6, 13
• How to add new features
easily?
- code, schema change, ...
- and all this for yesterday!
• Lot of code

6. One
size
does
NOT
fit
all!
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7. Look at our Data....
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8. Big
Data
High Data Variety and Velocity
Trillions
of
Gigabytes
(Ze:abytes)
2.00
1.50
Unstructured
and
Semi-­‐
Structured
Data
1.00
Text,
Log
Files,
Click
Streams,
Blogs,
Tweets,
Audio,
Video,
etc.
0.50
0
Structured
Data
2006
2009
Source:
IDC
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More
Flexible
Data
Model
Required
2012

9. 50
Million
Users
in
50
Days
Draw
Something
by
OMGPOP
Daily
Ac)ve
Users
(millions)
16
14
12
10
8
6
4
2
2/6
8
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10
12
14
16
18
20
22
24
26
28
3/1
3
5
7
9
11
13
15
17
19
21

10. How do you take this growth?
ApplicaXon
Scales
Out
Just
add
more
commodity
web
servers
System
Cost
ApplicaMon
Performance
Web/App
Server
Tier
Users
RDBMS
Scales
Up
Get
a
bigger,
more
complex
server
System
Cost
ApplicaMon
Performance
Won’t
scale
beyond
this
point
RelaXonal
Database
Users
Wednesday, November 6, 13

11. NoSQL Technology Scales Out
ApplicaXon
Scales
Out
Just
add
more
commodity
web
servers
System
Cost
ApplicaMon
Performance
Web/App
Server
Tier
Users
NoSQL
Database
Scales
Out
Cost
and
performance
mirrors
app
Xer
System
Cost
ApplicaMon
Performance
NoSQL
Distributed
Data
Store
Users
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12. OperaMonal
vs.
AnalyMc
Databases
Real-­‐Xme,
InteracXve
Databases
AnalyXc
Databases
NoSQL
Fast
access
to
data
Couchbase
MongoDB
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Get
insights
from
data
Cloudera
Hortonworks
Mapr

13. Polyglot Persistence
Big
Data/Analysis
•
Log
Capture
•
RecommendaMons
•
AdCampaign
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Document
&
K/V
•
Products
•
User
Profiles
•
Game
AcMons
•
Sessions
•
Shopping
Cart
RDBMS
•
Financial
Data
•
ReporMng
Indexing
•Full
Text
Search
•Ad
hoc
queries

14. Developer New Skills
• Understand the pros/cons of each solutions
­ Programming API
­ How to access the data? (API, Query Languages)
• Learn how to design data-model
­ De-normalizing and duplicate data is not a problem
• Integrate each solution to your application
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15. Data Service Layer
• Wrap datastore in Services
- Loosely coupled
Data
Service
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16. Use Case : Content Driven Site
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17. Use Case: Mobile Services
Web/App
Server
Tier
Web/App
Server
Tier
Rabbit
MQ
PIM
Database
-­‐
Legacy
ApplicaXon
-­‐
Product
InformaXon
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NoSQL
-­‐
Product
Data
-­‐
AddiXonal
Metada

18. Now what?
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19. Why multiple languages?
• Sometimes we have no choice
­ HTML/CSS/JavaScript + Server Side
­ Mobile Native Applications
• Java/.Net have not evolved that must these past years
­ Java EE 5.0 is still mainstream (2006)
• Many languages and frameworks
­ Scala, Clojure, Groovy, Dart, Go, Ruby, Python, F#, Erlang
­ Node.js, Rails, Play!, Grails, ...
Wednesday, November 6, 13

20. Examples
• Realtime interaction with WebSockets
- Wait for Java EE 7 to be out?
- Hack your app server and application with Continuation ?
- Use Node.js and Socket.io ?
• Data Collection and Treatment?
- Find a library?
- Create your library?
- Wait for Java 8 and Lambdas?
- Use Scala? ... or other
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21. Examples
• Simple CRUD Application
­ Use the JavaEE stack with JPA and JSF?
­ Use Spring ?
­ Use tools like Play!, Grails, Rails ?
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22. How to chose?
• Maturity/Supportability
• Features Set
• Learning Curve
• Productivity
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23. Polyglot Programming in Action
• Build a distributed database
­ Manage distributed
processes
­ Save and retrieve data on
disk
­ Cache the data on RAM
­ Build a query engine
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24. Polyglot Programming in Action
• Manage Distributed Process
­ Erlang and OTP (Open Telecom Platform) has been built for that
­ Taking this will bootstrap a project quickly instead of implementing in
another language
• Data access and Caching
­ C/C++ is the best/fastest way to interact with I/O
­ Leverage existing Caching layer, for example Memcached written in C
• Query & Indexing
­ Easy to code for developer : Let’s use JavaScript
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25. Couchbase Server
Query
Engine
Query
API
11210
/
11211
8091
Admin
Console
Data
access
ports
hbp
Object-­‐managed
Cache
Data
Manager
Wriben
in
C/C++
REST
management
API/Web
UI
Cluster
Manager
ReplicaMon,
ebalance,
Wriben
Sitate
RErlang
n
Manager
Shard
Erlang
/OTP
8092
Storage
Engine
Data
Manager
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Cluster
Manager

26. Use Case: Second Screen Gaming
AdministraXon
Java/Play
ApplicaXon
Python
scrips
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Users
Node.js
+
Socket
IO

27. Conclusion
• Use the good tool for the good task
­ Do not try to “hack” something when you have a shorter solution
­ Think about your users first... so deliver and get feedback
• Learning is part of our job !
­ And this will help you and your project
• Operations / DevOps
­ Think about it from day one... as a developer
• What about maintenance?
­ Do you think it is easier to maintain complex code?
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28. Q&A
@tgrall
tug@couchbase.com
Wednesday, November 6, 13