APIs, microservices, containers, agile teams. You might think of it as autonomous changes, both in reality all are manifestations of the same core ideas. Individually, they are useful. However, in harmony, they make a forceful lever for change. Doing things faster, better, cheaper, and with a lot more fun. That’s the new way of working. You’ve already collected a lot of information on digital transformation, microservices, policies, open banking, and the essential role of APIs – today and previously. You might be confused how to fit it into your situation. How and where to start? Or what would your best next step be? In this talk, you’ll get inspired by a stepwise growth model derived from practice. You’ll be introduced to the core implementation patterns for safe, reliable, and scalable API-strategy. A strategy that allows you to embrace future changes. An architecture around open standards, using mature, open source components of WSO2.

1. A blueprint for implementing APIs and microservices
15 October 2019
API Adoption.
WSO2 leading the way

2. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Pleased to meet
you
• I’m an Architect-at-large working at Yenlo.
• I’ve been close to the frontline of impactful
technological developments for twenty-five
years now, in a range of industries and in
various archITecture roles.
• Today, I’m focussed on designing cloud and
integration platforms, mostly with WSO2-
technology, often supporting enterprises in
their digital journey.
2

3. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
We’re Yenlo.
3
What we are
Yenlo is based in: Netherlands (HQ),
Germany, United States, Switzerland
and Sri Lanka. Expanding.
Strong team of certified WSO2 and/or
Java experts, dedicated to deliver
integration software solutions.
Growing.
Client base around the world, cross-
industry, of various scales of
operation and stages of maturity
Driver and organizer of the WSO2
Community, the place where
customers all over the world find,
share and present open source
solutions based on WSO2 technology
What we deliver
1st class Craftsmen for Service and
Event Driven Architecture
1st class Craftsmen for RAD based
Application Development
Product Selection, Architecture,
Design, Implementation, Grow live,
and Support services
Agile, DevOps and NoOps expertise
On-premise, Virtual-Private Cloud,
Hybrid, Integration-as-a-Service
20+ years of in-depth experience,
transparency and ownership
What we do
1. Consultancy services
Enterprise & Solution Architecture
services
Implementation services (projects
/ time & material)
2. Support services
WSO2 Product Support (24/7
patches & fixes)
WSO2 Operational Support (24/7
or 8+/5 CET)
WSO2 Development Support
(next business day)
3. Cloud services
Centraal Aansluitpunt (MDC)
Yenlo ConneXt

4. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
We’re in the midst
of the 3rd digital
transformation
• The IT industry’s multiple stages of growth
are often pictured as multiple curves with
distinct discontinuities
• The discontinuity is where the paradigm shift
happens – impacting both technology and
organization
• Currently, we’re transforming from an SOA
paradigm to the Digital Business / API
paradigm
4
Silo to Multi-
Channel
Architecture
Spaghetti to
Service Oriented
Architecture
Service Oriented
Architecture to
Event Driven
Architecture
OLAP
Internet
noSQL
IoT
Data
Processing
Era
Client-Server
Era
Enterprise IT /
SOA Era
Digital / API
Era
Adapted from Nolan Norton Institute
Batch processing
to OLTP
Hybrid Integration PlatformEnterprise Service BusETL, Message BrokerTransaction Monitor

5. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Market driver 1: Cloudification
5
Orchestrated containers on
virtual networks as cloud operating
model, providing resilience and
cosmic scalability, leveraging
smaller, immutable runtimes

6. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Market driver 2: Microfication
6
Orchestrated containers on
virtual networks as cloud operating
model, providing resilience and
cosmic scalability, leveraging
smaller, immutable runtimes
Microservices are the new
software development paradigm,
providing flexibility and
independence through
disaggregation and descoping

7. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Market driver 3: Data disentanglement
7
Orchestrated containers on
virtual networks as cloud operating
model, providing resilience and
cosmic scalability, leveraging
smaller, immutable runtimes
Microservices are the new
software development paradigm,
providing flexibility and
independence through
disaggregation and descoping
Databases get rearchitected.
Denormalization and data
replication give data isolation,
leaving consistency across data
silos to be managed elsewhere

8. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Market driver 4: Scaling Agile
8
Orchestrated containers on
virtual networks as cloud operating
model, providing resilience and
cosmic scalability, leveraging
smaller, immutable runtimes
Microservices are the new
software development paradigm,
providing flexibility and
independence through
disaggregation and descoping
Organizations are transforming
into collections of agile teams,
acting autonomously, ready to
change anything anytime, and
continuously evolving
Databases get rearchitected.
Denormalization and data
replication give data isolation,
leaving consistency across data
silos to be managed elsewhere

9. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Whilst APIs have become
the pinnacle of change
9

10. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
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4
5
6
2
3
1
Top-10 Benefits of WSO2 API Manager
Open source
WSO2 has open source in their DNA. Not only
their code is 100% open source, their full product
documentation and developer portal are also in
the open. There simply is no hidden bonus
functions, enterprise editions or payed add-on to
promote or upsell to. They even run a store to
facilitate the free exchange of connectors.
Open architecture
WSO2 proudly leverages common Apache
frameworks and open standards in general, to
provide interoperability both inside the WSO2-
platform and with 3rd-party products. This way it
is possible to fit the relevant WSO2 components
into your architecture. Compare that to vendors
who sell you their architecture to which you have
to adapt.
Feature Rich
Over the years, WSO2 has gradually extended
and continuously modernized their collection of
features. Today, they span the entire breadth of
application integration. Tomorrow they still want
to provide the features that are state-of-the-art.
Consequently, WSO2 will continue to have your
integration needs covered.
Common architecture
There are few vendors, if any, who provide a
complete integration solution and who have
designed their integration platform from a single
vision as an integrated set of products. But that
is exactly what WSO2 has achieved. It is not a
hodgepodge of products at different stages of
their lifecycle, architected in different styles, by
different teams and often constituted through
mergers and acquisitions. On the contrary. The
WSO2 products are complementary and well-
integrated. That makes them easy to use, easy to
manage, and easy to maintain.
Cloud agnostic
WSO2 invests heavily in the cloud-readiness of
their products. They embrace technologies such
as Docker and Kubernetes, and configuration
management tooling such as Ansible, Chef or
Puppet. The choice is yours. At the same time,
WSO2 ensures that on-premise scenarios are still
fully supported, and even hybrid architectures
are common. This ensures the future-proofness
of your investment in WSO2.
Zero lock-in
Being open, both in architecture and in source,
provides freedom. The freedom to use it, how
you want it, and as long as you want it. No
strings attached.
Supreme Flexibility
The WSO2 open architecture supports a great
variety of implementation scenarios. Your solution
design can really be tailored to suit your needs.
Professional 24x7 support
The WSO2 business model is built upon
delivering first class, around the clock support
services. WSO2 professionals spend 40% of their
time on support, and 60% on research and
development. This not only guarantees a well-
educated support staff, but also products that
are engineered to be support-friendly.
Proven solutions
With WSO2, you invest in a platform that’s more
than 12 years in use, by many enterprises
around the world. Security, scalability and
availability are all enterprise-grade or better. You
can implement auto-scaling and auto-healing
strategies. And you can use built-in machine
learning and complex event processing
technologies to make your solution smarter on
the run.
Recognized leader
Don’t take it just from our experience. Recently,
WSO2 got recognized as one of the Leaders in
The Forrester Wave™: API Management
Solutions, Q4 2018.
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11. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Don’t take it from me
11
What Forrester Says About WSO2
• “WSO2’s open source solution provides a
solid base for a variety of API strategies.”
• “[WSO2 is] the only fully open source
solution in our Forrester Wave analysis.”
• “WSO2 provides good breadth across all
evaluation criteria.”
• “[WSO2’s] strengths include formal life-
cycle management and non-REST APIs,
both of which facilitate mature and
disciplined enterprise API strategies.”
• “WSO2’s solution provides flexibility to
address a variety of approaches to APIs.”
• “The reference customers provided by
WSO2 are highly satisfied with its solution
and very satisfied with the vendor.”
• “[Customers] tend to be very to extremely
satisfied with the product’s detailed
features and functions.”
• “Customer comments include“[WSO2’s]
partnership attitude inspires confidence
and trust.”
•And “[WSO2’s] solution is easy to use.”
WSO2 recognized
as leader in
The Forrester
Wave™:
API Management
Solutions,
Q4 2018

12. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Leading edge:
WSO2 API Manager Microgateway
The Microgateway is designed for cloud-native architectures. It
provides the capability to create specialized gateway distributions
where only a single API or a group of APIs are included.
A Microgateway:
• Is able to execute in isolation without mandatory connections to
other components (Key Manager, Traffic Manager, Analytics)
• Typically targets a single system
• Is Immutabe - If APIs or Policies change after the Microgateway
has been built, a rebuild process is required to capture the
changes
• Integrates seamlessly with DevOps tools and CI/CD processes.
• Offers you a proxy that is capable of performing security
validations (Signed JWT, OAuth), in-memory (local) rate limiting
and Analytics.
12
Ballerina
inside

13. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Aligning market forces drive a major change
13
Orchestrated containers on
virtual networks as cloud operating
model, providing resilience and
cosmic scalability, leveraging
smaller, immutable runtimes
Microservices are the new
software development paradigm,
providing flexibility and
independence through
disaggregation and descoping
Organizations are transforming
into collections of agile teams,
acting autonomously, ready to
change anything anytime, and
continuously evolving
Databases get rearchitected.
Denormalization and data
replication give data isolation,
leaving consistency across data
silos to be managed elsewhere

14. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
𝝏𝑺
𝝏𝒕
> 𝟎
14

15. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Spaghetti on Steroids
15
Subtitle

16. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
WSO2 Cellery to
the rescue
Cellery is a code first approach to
building, integrating, running, and
managing composite applications on
Kubernetes.
This design is auto generated from the
cell specification. And with Cellery
Observability, you can generate a
similar runtime view.
16
Ballerina
inside

17. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Keep East-West and North-South separate
17

18. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
GettingonTopofHighly
DynamicArchitectures
18

19. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
What is it?
• A modern, general
purpose programming
language (Turing
complete)
• Integration centric
• Cloud native,
extensible
• Platform agnostic,
open
• Designed for
resilience
Why a new language?
• To support agile
teams with a single,
powerful development
tool, whatever their
target platform or
architecture
• To bring state of the
art integration
technologies to server-
side application
developers
What makes it special?
• Remote function calls
are as simple to code
as local function calls
• Connectivity details
inside code
• Built-in support for
streaming functions
• Sequence diagrams
19
?

20. Demo time

21. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Now, where to start?
21

22. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Growing live –
Continuous Improvement
with Regular Rejuvenation
22 24
Refine Vision and Strategy
Set the Scope
Define Target Architecture
Envision
Define Detailed Design
Refine Target Architecture
Define Proof Points
Design
Refine Detailed Design
Validate Target Architecture
Build Competence
Prove
Validate Detailed Design
Manage and Support
Plan Future Growth
Transition
Enhance and Extend
Scope and Scale
Improve Continuously
Improve
Platformlifecycle
envision
design
prove transition
improve
envision
design prove
transition
improve
envision
prove transition
improve
design
prove
transition
improve
envision
re-architect
re-architect
re-architect
design

23. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Our ‘Grow Live’
Strategy
Start with a minimum viable API
management implementation
Gradually increase scope
Scale just-in-time
Keep improving
23
1
2
3

24. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Our proven
‘Grow Live’
Strategy
Start with a minimum viable API
management initiative
Gradually increase scope
Scale just-in-time
Keep improving
• Limit risks. E.g. start only with APIs invoked from the
internal network (intranet). No API calls from mobile
apps, web apps and external networks (B2B) yet.
Consider Connext if you want to go quickly
• Focus on Core Architecture. Design for high availability
from the start, scale up elastically. And don’t forget to
close your back-doors.
• Start with simple policies and simple API designs.
Learn from there.
1
• Monitor closely and Prove Security
• Focus on Community Building/Developer Engagement
• Add integration domains and technologies
Consider adopting the cloud / containerization
2
• Closely monitor API adoption and usage
• Focus on Quality of Service. Aim for NoOps.
• Develop advanced throttling policies where necessary.
Consider monetization and/or differentiation of APIs
3
24
3
2
1

25. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
DMZ
DigitalTransformation
StepbyStep
Startingfromatraditionalwebsite
25
Intranet
Web Application Firewall / Reverse proxy
Internet
Webserver
Business Process
Management
Business Rules
Engine
ESB - Legacy Integration
Channels
Identity, Key and
Entitlement Management
Legacy Sources
Access Control
User Management
Process
Services
Transaction
Services

26. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
DMZ
DigitalTransformation
StepbyStep
Step1:MakeitSmarter
26
Intranet
Web Application Firewall / Reverse proxy
Internet
Business Process
Management
Business Rules
Engine
ESB - Legacy Integration
Channels
Identity, Key and
Entitlement Management
Legacy Sources
Authentication
Authorization
Access Control
User Management
Process
Services
Transaction
Services
API Management - API Gateway
Information
Services
Microservices

27. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
DMZ
DigitalTransformation
StepbyStep
Step2:EmbraceAPIFirststrategy
27
Intranet
Web Application Firewall
Internet
Global API Gateway
Data and
Event Analytics
API Management – Internal API
Gateway
Business Process
Management
Business Rules
Engine
ESB - Legacy Integration
Channels
Identity, Key and
Entitlement Management
Legacy Sources
Messaging
Authentication
Authorization
Access Control
User Management
Process
Services
Access
Control
Transaction
Services
API
workflows
IAM
workflowsAPI
workflows
Information
Services
Microservices

28. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
DMZ
DigitalTransformation
StepbyStep
Step3:PracticeDevOps>NoOps
28
Intranet
Web Application Firewall
Internet (of Things)
Global API Gateway
Public SaaS
Data and
Event Analytics
API Management – Internal API
Gateway
Business Process
Management
Business Rules
Engine
ESB - Legacy Integration
Virtual
Private
SaaS
Channels
Identity, Key and
Entitlement Management
Legacy Sources
Messaging
Authentication
Authorization
Access Control
User Management
Process
Services
Access
Control
Transaction
Services
Information
Services
Information
Services
API
workflows
IAM
workflows
API
workflows
Devnet
DevOps Tools
CI/CD
Development Tools
MQTT
IoT Device
Registry
Microservices

29. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
DMZ
DigitalTransformation
StepbyStep
Step4:Fullmicroandeventdriven
29
Intranet
Web Application Firewall
Internet (of Things)
Global API Gateway
Public SaaS
Master data
Microservices
Data and
Event Analytics
Business Rules
Engine
Virtual
Private
SaaS
Channels
Identity, Key and
Entitlement Management
Streaming microservices
Authentication
Authorization
Access Control
User Management
Access
Control
Information
Services
API
workflows
IAM
workflows
API
workflows
MQTT
IoT Device
Registry
Orchestrating
Microservices
Core Microservices
Devnet
NoOps Tools
CI/CD
Development Tools
API Management
Business Process
Management
Transaction
Services
Process
Services

30. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Managed middleware as a service
30
By Yenlo

31. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Problem
Statement
31
The problem of
Running, managing and maintaining a richly featured,
affordable, and reliable digital integration platform
Affects
Every enterprise opening its IT-systems and services to
connect to from outside their private networks
The impact of
which is
A high friction to innovate current business processes
and practices, which by itself is essential to keep the
business competitive in today’s fast-changing landscape
A successful
solution would be
To simply adopt a well-designed, well implemented, and
well-operated digital integration platform, available as-a-
service in the cloud

32. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
What is Connext by Yenlo?
• Managed Middleware Platform as a Service
• Based on WSO2: API manager, Enterprise Integrator, Identity &
Access Management, Data Analytics, ActiveMQ
• CI/CD build pipeline + Atlassian tooling for efficiency and quality
assurance in software development life cycle
• Platform is 24/7 hosted & operated by Yenlo team, you only have to
focus on developing Integrations / API’s
32
It’s a Full-Featured Middleware Platform Running as a
Managed Service in the AWS Cloud
1
Built on WSO2 API Manager, WSO2 Identity Server,
WSO2 Enterprise Integrator, ActiveMQ and Analytics
2
It Scales and Heals Automatically, Guaranteeing
Enterprise Grade Availability
3
The Platform is 24/7 Hosted & Operated by Yenlo.
You Can Fully Focus on your Integration Business
5
It Includes a Working CI/CD Build Pipeline +
Collaboration Toolset from Atlassian
4

33. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
We help clients to become
successful at leveraging their
full integration potential
33

34. © 2019 – Yenlo,
the Premier Certified Partner of WSO2
Key take aways
• Envision a discovery journey, growing live,
and go with the flow
• Always think API First
• Plan step by step, and monitor progress closely
• Stay in control, through sensible policies and
software-defined aggregation
• Plan for change, also in your budget
• Select technology that supports continued growth
• Embrace the Cloud (btw, Connext is really cool)
34