Links described during the presentation - Paran Yo, http://paran-yo-staging.appspot.com/ - AppEngine administration console: https://appengine.google.com - SDK Release notes (Python, PHP): https://code.google.com/p/googleappengine/wiki/SdkReleaseNotes - Google APIs Console: https://code.google.com/apis/console - CapeDwarf: Running Google App Engine apps in JBossAS7: http://www.jboss.org/capedwarf 2013-09-03 techtalk3-googleappengine-v0.00

1. Contact details
alt-f1 sprl – Tech talk #3 – Google Appengine
Managing Partner
ALT-F1 SPRL/BVBA
Abdelkrim BOUJRAF
@: abo@alt-f1.be
W: www.alt-f1.be
M: +32 (0)497 480.970
1
03 Sept 2013
Twitter: @abdelkrim

2. ALT-F1.be
2
 Group of products/software manufacturers
 Business Intelligence
 Project – Program – Portfolio management
 Offline Marketing
 Quality Assurance
 R&D
 Cloud computing
 Lean manufacturing (Optimisation)

3. Paran Yo, the place where we can share
the world!
Case study3

4. Paran Yo, the place where you can
share the world!4
http://paran-yo-
staging.appspot.com/

5. Where do I start?
The methods
Paran Yo5

6. V-Model (software
development)
Requirements
analysis
System
Design
Architecture
Design
Module
Design
User
Acceptance
Testing
System
Testing
Integration
Testing
Unit Testing
Source
code
Determining the needs or conditions to meet for a new
or altered product, taking care of the conflicting
requirements of the various stakeholders
6
Defining the architecture,
components, modules, interfaces,
and data
Defining the
architecture,
components,
modules, interfaces,
and dataDesign independent,
interchangeable
collection of
procedures and other
values

7. Methods - Requirements
analysis
 Rational Unified
Process
 FURPS
 Functionality
 Usability
 Reliability
 Performance
 Supportability
 FURPS+
 design constraints
 implementation
requirements
 interface requirements
 physical requirements
7

8. technical & non tech.
requirements
 Legal requirements
 Data privacy, SOX
 Regulatory reqs
 Solvency II, Basel III
 Policy
 Computer security
 Recommandations
 W3C, IETF (RFC,
Internet Standards)
 Standards
 HTML, UNICODE,
ISO, ECMA, IANA,
Java Specification
Requests
 Non-standards
 Silverlight, Flash,
XUL
8

9. Cloud computing or disguised Application
Service Provider?
use of computing resources
delivered as a Service over a
network
9

10. Infrastructure as a Service
(IaaS)10
 …to provision processing, storage,
networks, and other fundamental
computing resources where the consumer
is able to deploy and run arbitrary
software…
 …consumer DOES NOT manage or control
the underlying cloud infrastructure but has
control over [it]…
 … possibly limited control of select networking
components (e.g., host firewalls)
Source: Mell, P., & Grance, T. (2011, September). The NIST Definition of Cloud Computing. Gaithersburg, Maryland, U.S.A.: National Institute of Standards
and Technology.

11. Platform-as-a-Service (PaaS)
11
 …to deploy onto the cloud infrastructure
consumer-created or acquired applications
created using programming languages and
tools supported by the provider
 … The consumer DOES NOT manage or
control the underlying cloud infrastructure…
 … [but consumer] but has control over the
deployed applications and possibly application
hosting environment configurations
Source: Mell, P., & Grance, T. (2011, September). The NIST Definition of Cloud Computing. Gaithersburg, Maryland, U.S.A.: National Institute of Standards
and Technology.

12. Software-as-a-Service (SaaS)
12
 …to use the provider’s applications
running on a cloud infrastructure…
 The applications are accessible from various
client devices through a thin client interface
such as a web browser (e.g., web-based e-
mail)
 The consumer DOES NOT manage or control
the underlying cloud infrastructure … with the
possible exception of limited user-specific
application configuration settings
Source: Mell, P., & Grance, T. (2011, September). The NIST Definition of Cloud Computing. Gaithersburg, Maryland, U.S.A.: National Institute of Standards
and Technology.

13. IaaS
• Amazon Elastic Compute
Cloud
• Google infrastructure
• Microsoft Cloud infrastructure
• Rackspace
• Computer Sciences
Corporation
• Terremark
• Bluelock
• Savvis
PaaS
• Google App Engine
• Heroku
• Engine Yard
• AppScale
SaaS
• Google Apps
• Salesforces
• Zoho
• Office365 - Hotmail
Cloud-as-a-Service (I/P/SaaS)
13
processing, storage,
networks
Consumer created or
acquired applications
processing, storage,
networks
Provider’s applications
Consumer created or
acquired applications
processing, storage,
networks

14. How much does it cost to deliver value to
your customer?
Paran Yo
29 November
2012
14
alt-f1 sprl - Université de Lille1 Master informatique - Les conférences du Jeudi

15. 15$/1 thousand views without
business complexity15

16. Architecture -15$/1 thousand views
without business complexity
User
Internet
Services: TaskQueue, Mail, Image, Fetch, Users
Python 2.5
Memcached API
Memcache transient
GQL – Query Object
DataStore persistent
16

17. Architecture -15$/1 thousand views
without business complexity
GAE SDK 1.6.5
Webapp1 APIs libraries
Google
analytics
Google
charts
OpenId
2.0
Users api
17

18. Architecture -15$/1 thousand views
without business complexity
Model
Datastore
View
Bootstrap
Twitter
2.0.3
CSS 3 HTML 5
Controller
Django
1.2 (MTC)
18

19. Architecture -600$/1 thousand
views
without business complexity19

20. GAE Application: How to budget the
deletion of 5000 records in a table?
20
how to compute the cost of deleting 5000 records from a table containing
five columns of string type. We assume that each column is indexed and
there is no composite index.

21. 60$/1 thousand views with
business complexity21

22. 60$/1 thousand views with
business complexity22

23. Architecture - 60$/1 thousand
views
with business complexity
Model
Datastore
View
Bootstrap
Twitter
2.0.3
jQuery
1.7.2
CSS 3 HTML 5
Controller
Django
1.2 (MTC)
23

24. I used to be blind, now I see!
25

25. Architecture - 7$/1 thousand views
with business complexity
GAE SDK 1.7.3
Webapp2 APIs libraries
Google
analytics
Google
charts
OpenId
2.0
Users api
26

26. Technical summary
Paran Yo27

27. Case study: Paran Yo
 Cloud computing
 Platform-as-a-Server
(PaaS)
 High availability
 Scalability
 Google App Engine
 NoSQL
 Creational design
patterns
 Abstract factory
 Lazy initialisation
(jQuery)
 Structural design
patterns
 Decorator (Python)
 Behavioral pattern
 Chain of
responsibility (url
patterns)
 Iterator
 Mediator
(middleware
django)
 Architectural
pattern
 Model-View-
Controller
28

28. Technical specifications
 Webapp2
 python2.7
 WTForms
 Tech spec
 GAE SDK 1.6.5
 datastore
 Bootstrap Twitter
2.0.3
 Google analytics
 Google charts
 Python Image
Library (PIL)
 Memcache
 TaskQueues
 OpenId 2.0
 Django 1.2
 jQuery 1.7.2
 Users api
29

29. We have talked about the costs, now let’s
see how to make money?
Incomes - Earnings30

30. On internet, how to earn
money?
 Subscription fees
 Free + Advertising
 Freemium
 Premium
 Open Source model
 Free software but
support is invoiced
 Brokerage fees
Affiliates
 Amazon associates
 iTunes Connect
 Google AdSense
 eBay affiliates
 Online advertising
 Ancillary revenues
31

31. Tips
Almost the end32

32. Performance best practices
33
 Optimizing caching (leverage browser
caching)
 Minimizing round-trip times (parallelise
downloads across hostnames)
 Minimizing request overhead (Cookies)
 Minimizing payload size (minify the code)
 Optimizing browser rendering (specify
everything)
 Optimizing for mobile (Defer JavaScript
loading)
Source: https://developers.google.com/speed

33. Tips
34
 Have you developed a proof of concept
 ... using a complex use case
 ... running under the selected software
architecture?

34. Tips
35
 Develop a mindset, adapt to change, work in
team
 Speak like a business man, code like a geek
 Put in place an Escrow, Backup strategy &
Source Control first
 Do not set the “automatic updates”
 Document briefly your code but extensively
your architecture and processes
 Focus on innovation and how to bring value to
the business using your IT knowledge

35. Q&A
Managing Partner
ALT-F1 SPRL/BVBA
Abdelkrim BOUJRAF
@: abo@alt-f1.be
W: www.alt-f1.be
M: +32 (0)497 480.970
36
Twitter: @abdelkrim