1. for
Modernizing
Legacy
Systems
Mifan
Careem
SOA
Pa+erns:
File
Gateway
Director,
Solu-ons
Architecture,
WSO2
Senior
So5ware
Engineer
WSO2
Jason
Catlin

2. Agenda
๏ About
WSO2
๏ SOA
and
Legacy
Moderniza?on
๏ Legacy
systems
and
file
based
ops
๏ File
based
Gateway
๏ Related
PaDerns
๏ Bringing
it
all
together
๏ References
2

3. 3
About
the
Presenters
๏ Mifan
Careem,
Director
of
Solu?ons
Architecture
at
WSO2
๏ Mifan
AT
WSO2.com
๏ Works
closely
with
clients
and
WSO2
engineering
and
sales
teams,
in
defining
domain
specific
solu?ons
architectures
๏ Jason
Catlin,
Senior
SoMware
Engineer
at
WSO2
๏ Jason
AT
WSO2.com
๏ Helps
sales
teams
with
technical
pre-­‐sales
queries
and
works
closely
with
customers
in
solving
customer
problems

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

5. 5
What
WSO2
delivers

6. 6
Business
Model

7. The
need
to
Modernize
Enterprise
Systems
๏ With
?me,
enterprises
need
to
evolve
their
exis?ng
systems,
opera?ons,
business
logic
and
partners
to
meet
modern
day
needs
and
innovate
๏ Exis?ng
systems
may
consist
of
legacy
technologies,
legacy
logic
contained
in
files,
complex
infrastructure
and
legacy
transport
such
as
FTP
etc.
๏ Due
to
the
?me
and
cost
complexi?es,
prior
investments,
integra?on
requirements
and
infrastructure
factors,
enterprises
cannot
leave
behind
the
exis?ng
plaXorms
๏ Hence
organiza?ons
required
the
capability
to
modernize
these
exis?ng
systems
with
minimal
risk
and
minimal
effect
to
the
legacy
systems
in
a
short
?me-­‐frame
7

8. Drivers
for
moderniza?on
๏ Time
and
schedule
๏ Minimized
development
and
deployment
costs
๏ Monitoring
and
metering
๏ Quality
๏ Minimized
Risk
๏ System
performance
๏ Agility
and
flexibility
8

9. Moderniza?on
strategies
๏ Informa4on
integra4on
๏ Web
enabling
legacy
plaXorms
๏ End
to
end
service
plaXorm
9

10. An
Enterprise
Requirement
๏ Modernize
an
exis?ng
legacy
tax
plaXorm
that
uses
files
as
the
media
of
communica?on.
Batch
opera?ons
are
based
on
files
that
are
pushed
via
FTP
from
3rd
party
systems.
Output
to
the
flow
should
eventually
be
files
10

11. File
Gateway
PaDern
11
๏ Solu?on:
Intermediary
two-­‐way
file
processing
logic
is
posi?oned
between
the
legacy
system
and
the
service
๏ Applica?on
๏ Inbound:
Detect
file
drops,
transform
and
use
๏ Outbound:
intercept
service
output,
transform
and
convert
to
files

12. Example
Scenario
12
๏ Files
are
pushed
from
external
systems
into
a
file
store
๏ FTP,
SFTP
๏ File
store
is
monitored
by
a
gateway
๏ File
content
is
processed
from
input
file
๏ Processing
takes
place
based
on
content
of
files

13. WSO2
ESB
as
a
File
Gateway
13

14. WSO2
ESB
-­‐
Concepts
๏ Proxy,
Sequences,
Mediators
๏ VFS
Transport
๏ WSO2
ESB’s
feature
rich
file
transport
๏ VFS
transport
uses
the
versa?le
Apache
Commons-­‐VFS
library
as
the
underline
library
for
various
file
system
related
opera?ons
๏ WSO2
ESB's
VFS
transport
consider
all
file
names
as
URIs
๏ Smooks
Mediator
๏ In-­‐built
ESB
mediator
for
effec?ve
transforma?ons
๏ Enterprise
Integra?on
PaDerns
14

15. A
Smooks
EDI
Scenario
๏ Drop
an
Electronic
Data
Interchange
(EDI)
file
to
VFS
input
directory.
๏ ESB
picks
the
file
and
sends
to
its
Smooks
mediator.
๏ Smooks
mediator
transforms
the
EDI
file
to
XML
format.
๏ Based
on
the
message
type
sending
file
to
correct
endpoints.
15

16. ESB
sequences
using
graphical
tool
16

17. File
Gateway
for
other
scenarios
17
Diagram

18. Impact
and
Issues
๏ The
type
of
logic
provided
by
this
paDern
is
unsuitable
when
immediate
replies
are
required
by
either
service
or
legacy
system.
๏ Deployment
and
governance
of
two-­‐way
file
processing
logic
can
further
add
to
opera?onal
complexity
and
may
require
specialized
administra?on
skills.
18

19. Focus
on
your
priori?es!
19

20. Related
PaDerns
๏ Data
Format
Transforma?on
๏ Protocol
Bridging
๏ Legacy
Wrapper
๏ Mul?-­‐channel
Endpoint
20

21. Bringing
it
all
together
21

22. The
bigger
picture
22

23. Demo
23

24. Summary
๏ Many
legacy
systems
maintain
core
business
logic
in
file
based
opera?ons
๏ The
File
Gateway
paDern
acts
as
a
media?on
layer
between
file
logic
and
service
logic
๏ File
Gateway
can
be
implemented
using
various
technologies
and
concepts
such
as
WSO2
ESB,
WSO2
BPS,
WSO2
AS,
VFS
transport,
Smooks
mediator
24

25. 25
References
๏ Enterprise
Integra?on
PaDerns
with
WSO2:
hDps://docs.wso2.com/display/Integra?onPaDerns
๏ WSO2:
hDp://wso2.com/

26. Contact
us
!