2. WSO2 Background
- Founded in 2005 by recognized leaders in XML, Web services
technologies, standards and open source
- Primary contributors to Apache Web Services projects started in 2001
- Funded by Intel Capital & Quest Software ($11M)
- Technology OEM’d by IBM, Progress, Software AG, Alcatel, EMC,
and CA
- Global offices:
- Palo Alto, USA - Portsmouth, UK - Sydney, Australia - Colombo, Sri Lanka
- 145+ employees and growing
3. WSO2 Platforms and PaaS
WSO2 Carbon WSO2 Stratos WSO2 StratosLive
Enterprise Middleware Cloud Middleware Platform Java PaaS
Platform
On-premise on physical or Cloud-native (multi-tenant & Public Java PaaS operated by
virtualized environments metered), deployed as private WSO2
or public PaaS
Full suite of products – start with Full benefits of cloud – from Instant access to middleware –
one, click to add more using VMs to building higher as-a-Service
level PaaS or SaaS apps
In production at 100+ F1000 Manage central ops, enable Pay just for what you use;
enterprises; 1B txn per day at developers to self-provision flexible billing
eBay middleware services
Common Code Base
• Complete middleware stack
• OSGi-based componentized platform
• 100% open source and standards
4. WSO2 support engagement model
- QuickStart
- Development
Support
- Development
Services
- Production
Support
- Turnkey
Solutions
5. John Keells Group
- Founded in 1870; A proud history spanning 140 years
- Sri Lanka’s highest market capitalized company - Exceeds USD 1.6 billion
- Group’s 9 listed companies contributes to 15 % of Colombo Stock Exchange market cap
- Group Revenue – Rs.60.5 billion in 2010-11
- 10,000+ Employees
- Present in key sectors of Sri Lankan economy (Transportation, Property, Leisure, Consumer Foods &
Retail, Information Technology & BPO, Financial Services & Plantation Services)
- A Full Member of the World Economic Forum
- First Sri Lankan company to be listed overseas – GDRs listed on the Luxembourg Stock Exchange
with a AAA+ credit rating
- Ranked among the “200 Best under a Billion” in Asia Pacific by Forbes
- LMD's Most Respected Entity in Sri Lanka – Placed first in four out of five years, since inception
- Signatory to the UN Global Compact
6. BU - KeellsSuper
- Keells Super is one of the leading supermarket chains in the country which has
been in operation for the last 20 years
- Keells Super was Instrumental in popularizing Modern trade in Sri Lanka
- Currently at 42 outlets and expanding
The
First
and
only
online
supermarket
in
Sri
Lanka
-‐
First
Retailer
to
KeellsSuper.com
implement
a
leading
ERP
in
Sri
Lanka
–
2004/5
Introduced
the
first
Loyalty
program
in
Retail
with
Integrated
CRM
and
BI
in
Sri
Lanka
Real-‐Jme
stock
taking
using
handheld
scanners
(Recognized
as
a
case
study
by
Motorola)
Introduced
the
first
Retail
Radio
in
Sri
Lanka
(Keells
Super
Radio)
7. Business Requirement
- Streamline the SAP and POS integration - Eliminate the performance issues
and failures faced with the current SAP and POS integration
- Seamless integration with the online store – keellssuper.com
.com
8. Business Requirements Required Integration scenarios
Direction Description
Arti cl e
masters
-‐
new
a nd
c hanges
Condi ti on
masters
-‐
pri ce
c hanges
Vendor
masters
-‐
new
a nd
c hanges
Customer
master
(credi t
c ustomers)
Outbound
Bonus
Buy
Condi ti ons
/
Promoti ons
(Head
offi ce
-‐>
Downl oad
phys.
i nv.
docs,
upl oad
phys.
i nv.
c ount
data
POS)
Credi t
l i mi ts
Stock
bal ances
Gi ft
vouchers
master
data
Appl i cati on
a cknowl edgements
Fi nanci al
transcati ons
Inbound Upl oad
day-‐end
c l osi ng
POS
(POS
-‐
>
Head
Upl oad
s al es
data
(compressed)
offi ce) Inventory
c ounts
Gi ft
vouchers
-‐
i ssues
9. Technical Requirements
- Guaranteed delivery - message queuing and guaranteed delivery semantics
- Unreliable and slow networks (specially in outstations), POS Server outages
- Minimize changes to existing infrastructure – POS
- Quality of service (QOS) requirements
- Exactly Once In Order – E.g. Price changes
- Exactly Once – E.g. Sales data
- Better performance without impacting the ERP system
- Avoid using synchronous BAPIs/RFC and adopt IDOC based integration which is used by
almost all SAP ERP Retail customers
- Message throttling
- Prioritization of Messages
- Price changes Vs Article description change
- Light weight, simple and easily maintainable integration middleware
12. Message flow and Enterprise Integration Patterns used
(2) Transform/Map to IDOC structure
- WPUUMS01 has limit on max line items per IDOC
therefore will need to be split into multiple IDOCs ç (1) Query Sales line-items by Polling
• Update on message successfully accepted by the
ESB - (Update TRANFFERED_TO_ESB =“TRUE”)
Message translator Polling Consumer
Spilter
(XSLT)
SAP ç (3) Post IDOC ‘WPUUMS01’
ESB POS
Receiver Sender
è (4) Technical ack - è (5) Update on Technical ack - UPDATE record : SQL
IDOC created successfully /failed • TRANFFERED_TO_SAP_TEC_ACK=“TRUE”
messages if reprocessed in SAP.
Content-Based Router
Store and Forward
è (6) Application ack - (ALEAUD) è (7) Update on Application ack - UPDATE record:
(status, message) – Multiple ALEAUD • ALEAUD message status and update field
messages if reprocessed in SAP. TRANSFFERED_SAP _APPLICATION_ACK = “TRUE”
and update field TRANSFFERED
Content-Based Router
Notations from the book Enterprise Integration Patterns - Gregor Hohpe
13. Deployment architecture - Sizing
- 500k transactions on an Direction Message
Type
#
of
IDOCs
on
May
2 011
ALEAUD
4 ,569
average month ARTMAS
7 5,189
- 1 million on seasonal COND_A
3 25,517
CREMAS
2 14
months Outbound
DEBMAS
1 9
(Head
offi ce
-‐>
- Avg Size of a message - POS)
WPDBBY
WVINVE
6 46
4 ,110
100kb – 5mb ZFI_CRED
3 01
ZMM_STOCK
1 1,592
ZSDGV
4 91
WPUFIB
5 ,058
Inbound WPUTAB
1 ,339
(POS
-‐
>
Head
WPUUMS
8 ,565
offi ce) WVINVE
3 3,866
ZSDGVRE
4 ,140
14. Deployment architecture
Production Server Configuration DR
Server 1:-CPU:- 4 Cores
RAM:- 8 GB
Storage :- 50 GB
Server 2: CPU:- 2 Cores
RAM:- 4 GB
Storage :- 140 GB
Development Server Configuration
CPU:- 4 Cores
RAM:- 8 GB
Storage :- 105 GB
15. Project Challenges & Lessons learnt
- What worked in the Lab with sophisticated load test
tools can break in the real environment
- When you have multiple components (SAP ERP, POS,
50+ end points over unreliable networks) it’s difficult to
simulate a real production environment
- Strike a balance between offshore and onsite model
- Have frequent project / steering committee meeting to ensure
EVERYONE is on the same page to avoid surprises
17. Summary
- Bus architecture to connect 40+ POS endpoints
- Transform and throttle messages based on SAP specification
- Cater for higher load
- Pull model to minimize the infrastructure changes
- Map EIPs to handle message flows and QoS
- Convert SQL data into SAP iDOCs
Future Project Enhancements ?
18. More Info
§ Corporate website: http://wso2.com
§ Developer portal: http://wso2.org
§ Business development team: bizdev@wso2.com
§ John Keells SAP and WSO2 Professional services
§ Website : http://www.sgit.keells.com
§ Business development team : info.sgit@keells.com
