1. API
Façade
Implemen'ng
API
Façade
using
WSO2
API
Management
Pla9orm
Asanka
Abeysinghe
Vice
President,
Solu'ons
Architecture
@asankama,
hBp://asanka.abeysinghe.org

2. About
WSO2
-
-
Global
enterprise,
founded
in
2005
by
acknowledged
leaders
in
XML,
web
services
technologies,
standards
and
open
source
Provides
only
open
source
plaDorm-­‐as-­‐a-­‐service
for
private,
public
and
hybrid
cloud
deployments
-
-
2
All
WSO2
products
are
100%
open
source
and
released
under
the
Apache
License
Version
2.0.
Is
an
AcLve
Member
of
OASIS,
Cloud
Security
Alliance,
OSGi
Alliance,
AMQP
Working
Group,
OpenID
FoundaLon
and
W3C.
-
Driven
by
InnovaLon
-
Launched
first
open
source
API
Management
soluLon
in
2012
-
Launched
App
Factory
in
2Q
2013
-
Launched
Enterprise
Store
and
first
open
source
Mobile
soluLon
in
4Q
2013

3. What
we
do:
WSO2
can
help
any
business
wherever
they
are
and
take
them
where
they
want
to
go.
A
pp
3rd
Party
Apps
API
Business
=
{People,
Processes,
Data}
Business
(WSO2
Carbon
middleware)
Business
=
{People,
Processes,
Data}
3rd
Party
Apps
API
A
pp
A
pp
PaaS
for
Managed
3rd
Party
Apps
API
Business
=
{People,
Processes,
Data}
Business
with
APIs
Connected
Business
(WSO2
API
Manager)
(WSO2
App
Factory)

4. What
we
deliver
4

5. Business
Model
5

6. Source
for
my
Business
APIs
Who
is
going
to
use
my
APIs
?
Can
I
change
my
business
/
business
processes
?
Write
new
set
of
services
?
What
will
happen
to
the
old
services
?
Can
I
expose
my
services
as
it
is?

7. Business
Service
PlaDorms
-
Heterogeneous
-
Styles
-
-
-
SOAP
RESTful
Bindings
-
-
-
-
-
SOAP/HTTP/s
POX/HTTP/s
POX/JMS
JSON/HTTP/s
File
{CSV,
EDA,
COBOL}
-
Development
languages
{Java,
WCF,
PHP,
C/C++,
JavaScript}
-
FuncLonality
{Focused
on
internal
service
consumers/
applicaLons}
-
Silos,
owned
by
various
BUs,
no
control

8. Demand
for
APIs
Picture Credit : http://www.newscientist.com/blogs/onepercent/2012/01/letting-gamers-experience-the.html

9. Demand
for
APIs
–
cont..

10. Façade
Pahern
Picture Credit : http://hypebeast.com/2009/11/nike-harajuku-store-opening/

11. API
Façade
Pahern
–
cont..
External Format (Demand)
Façade
Mediation
Backend Services

12. API
Façade
Pahern
–
Generic
Pahern
External Format (Demand)
Façade
Façade + Mediation
Mediation
Backend Services

13. Results
-
Brining
complexity
to
the
Façade
layer
{outside
the
firewall}
-
WriLng
wrapper
service
to
shape
the
backend
services
-
Few
protocols
{HTTP/s,
JMS}
cannot
solve
the
complexity
of
integraLon
-
Service
virtualizaLon,
chaining,
orchestraLon,
complex
rouLng
requirements
-
Missing
architecture
decupling
-
LimitaLons
to
scale

14. WSO2’s
API
Management
Vision
- Create
APIs
- WSO2
ESB,
ApplicaLon
Server,
Data
Services
Server
and
BPS
- Find
and
subscribe/buy
APIs
- API
Store
and
Governance
- Manage,
secure
and
protect
APIs
- API
Management
and
Gateway
- Monitor
and
MoneLze
APIs
- API
Monitoring
and
AnalyLcs
- Develop,
host
and
run
API-­‐based
applicaLons
in
a
PlaDorm-­‐as-­‐a-­‐Service
- WSO2
App
Factory
- Domain
Specific
PaaS
WSO2
API
Management
PlaDorm

15. Why?
To
be
PRAGMATIC
-
Gap
between
the
demand
and
current
service
plaDorms
-
Required
to
call
mulLple
services
to
make
a
meaningful
API
method
/verb
-
Required
to
call
mulLple
data
layers
to
build
a
resource
/
noune
{MDM}
-
Required
to
update
mulLple
systems
/
sub-­‐systems
{MDM,
transacLons}
-
AddiLonal
security
due
to
external
access
{security
bridging}
-
AddiLonal
business
rules
due
to
external
access
-
Go
to
market

16. API
Façade
Pahern
–
WSO2
recommended
architecture
External Format (Demand)
Façade
Mediation
Mediation
Backend Services

17. API
Façade
Pahern
–
WSO2
ImplementaLon
External Format (Demand)
Façade
Mediation
Backend Services

18. API
Façade
Pahern
–
WSO2
ImplementaLon
extended
Mediation /
Service Virtualization /
Orchestration
Service
Platforms
Other Service
Containers
Ext API
(Demand)
API Façade

19. API
Façade
Pahern
–
WSO2
ImplementaLon
BIG
PICTURE

20. Under
the
hood
of
API
Manager
You can combine the
Façade and
Mediation layers (if
required) and run as a
single architecture
layer.
Picture Credit : http://green.autoblog.com/2011/07/28/four-cylinder-engines-dominate-in-u-s/

21. API-­‐centric
SOA
“API
Management,
the
missing
link
for
SOA
success.”
–
Sanjiva
Weerawarana

22. API-­‐centric
SOA
cont…
APIs
API
Façade
Services
Services
BU-­‐1
22
Services
BU-­‐2
BU-­‐3

23. Façade
–
funcLonal
components
-
-
-
-
-
-
-
-
23
Protocol
switching
Message
transformaLon
Service
chaining
Canonical
datamodels
Industry
standards
Security
bridging
Message
rouLng
Response
caching

24. Use-­‐case
24

25. Use-­‐case
cont..
25

26. Use-­‐case
cont..
More info:
1. http://asanka.abeysinghe.org/2013/05/implementing-api-facade-with-wso2-api.html
2. http://asanka.abeysinghe.org/2013/04/pragmatic-approach-to-api-facade-pattern.html
26

27. Summary
-
Clean
architecture
by
separaLng
the
concerns
-
Have
a
clear
separaLon
of
internal
and
external
processing
of
an
API
call
-
Ability
to
scale
based
on
the
usage
of
each
layer
-
Avoid
implemenLng
new
services
or
building
wrapper
service
layers
-
Leverage
SOA
principles
with
the
new
WEB
API
architecture
-
ULlize
the
middleware
and
go
to
market
quickly

28. Contact us !