Enterprise Applications, Microservices and SAP HANA Cloud Platform

.consulting .solutions .partnership
Enterprise Applications, Microservices
and SAP HANA Cloud Platform

Enterprise Applications, Microservices and SAP HANA Cloud Platform
1) © NASA / James Blair - http://spaceflight.nasa.gov/gallery/images/shuttle/sts-128/html/jsc2009e156744.html, Public Domain: https://commons.wikimedia.org/w/index.php?curid=7850400
2) © Hugovanmeijeren - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=10282772
Enterprise Applications
© msg | October 2016 | 4th IT Conference on SAP Technologies 2
Enterprise application software includes content, communication, and collaboration software; CRM software;
digital and content creation software, ERP software; office suites; project and portfolio management; and SCM
software. (Source: Gartner IT Directory)
Datacenter RealityManagement View
1) 2)

Evolution of an Enterprise Application
Global Scale
Cloud Ready
Mobile First
Paradigm
Simple
Solution
Powerful &
Complex
Application

Challenges for Enterprise Applications
4
Enterprise
Application
© msg | October 2016 | 4th IT Conference on SAP Technologies
Performance & Elasticity
(Dynamically) scale an
application to meet peak
performance needs
Integration
Connect the application to
internal and external/ cloud
systems
Collaboration
Communication as part
of business objects
Extensibility/ Change
Adapt a solution to meet
business needs and remain a
standard application
nonetheless
Operations
Deploying several versions,
patching, monitoring.
Reducing operating cost.
DevOps approaches.

5
… an n-dimensional Challenge
• System landscapes with applications
based on different technology are very
common.
• Business driven integration is more
likely to succeed.
• Web Services and CORBA were first
approaches for a technology agnostic
interface.
• Some applications may stay on premise
forever. (Mission-critical apps)
• Today, we consider an application very
often either on premise or in the cloud.
• Hybrid cloud scenarios evolve more and
more.

Digital Transformation – Innovate, Be Fast, Differenciate
Cloud as an Enabler
Flexibility
Scalability
Big Data/ Analytics
Mobility/ Networks
Imagine
Prototype
Build
Go Live

So, let‘s start an interesting journey dealing with the challenges !!!
„I don‘t have (the one) solution – but I admire the problem!“

© https://flic.kr/p/3DNDPu
Microservices – The next big thing or the next zoo?

Defining Microservices by Features
9
(Eberhard Wolf, Microservices – Flexible Software Architecture.)
… communication
REST or messaging protocols.
… technology agnostic
no restriction on the programming
language or the platform for each
microservice.
… a modularization concept
divide large software systems.
This influences the organization
and development of software
systems.
… separate deployment
changes can be taken into
production independently of
changes to other microservices
… own storage
Separate database, multiple
databases, or at least own
DB schema
… loosely coupled/ resiliant
can handle failure or changes to a
distributed system.
Microservices focus on a system and not on
the whole IT of a company.
… UI
Microservices often come with
UIs or can easily be integrated in
an UI.

What does a Microservice look like?

Onion Architecture

Onion Architecture – Domain Model
1. Implementing Domain-Driven Design – Vaughn Vernon, 2013
• Contains the definition of the
domain model
• Incorporates both behavior and
data
• Is not specific to any technology Domain
Model
Domain Model

Onion Architecture – Domain Services
Domain Services
Domain Model
• Contains domain services, which
encapsulate business logic
Domain
Model

Onion Architecture – Application Layer
Application
• Exposes domain services through
interfaces
(e.g. REST, OData)
• Provides infrastructure adapters
(e.g. repository implementations)
Domain Services
Domain Model
Domain
Model

Onion Architecture – UI/Infrastructure Layers
• Uses APIs provided by the
application layer to call domain
services
User Interface
Infrastructure
• Contains adapters for various
technology concerns
(e.g. database, logging, etc. )
Application
Domain Services
Domain Model
Domain
Model

How big is a microservice?

17
Microservices in Action

18
Microservices as Integration
Technology
Mobile Apps
Microservices power small
apps with dedicated information
or provide services
Microservices as Enhancement
Strategy
Microservice Applications
A whole application is build
with microservices

We don‘t make mistakes – we learn!
19© msg | October 2016 | 4th IT Conference on SAP Technologies
Microservice
FILES ARE UPLOADED
• Microservices focus on UI and a
distributed system
• Scalability/elasticity is a goal
• Microservices don‘t favour EAI/ESB
solutions
• It changes the development organization
SOA
TWEETS ARE SEND
• SOA tries to find a solution for the
enterprise
• SOA is about governance
• SOA does not care about the individual
service consumer – SOA tries to answer
the question, if there is a generic data
model and a generic interface

Microservices – A little look at the workshop
© https://www.flickr.com/photos/mtneer_man/9207206499

Business Applications based on SAP HANA Cloud Platform
Platform Services
SAP HANA Cloud Platform (PaaS)
Runtimes
Data & Storage Services
Development
Operations
IAAS
ASE
UX
Security
Mobile
Integration
Analytics
IoT
Collaboration
Java
XSJS
HTML5
Service Enablement | API Management
Business Services
Node.js
Other
Big Data Services
HANA / Vora
Redis
PostgreSQL MongoDB
Hadoop
On-Premise /
Managed
Cloud
SAP HANA Cloud Platform – Current & Planned Innovations
Source: SAP SE
SaaS/
Public Cloud
Solutions
Applications
Commerce Loaylty Mgmt. Billing …

22
SAP HANA Cloud Platform – Selected Business Value
Reduce operating expenses
This text can be replaced with your
own text. This is a placeholder text.
01
Agility
Companies are looking for
• cost savings,
• strategic advantages,
and capabilities for meeting
current (business) requirements.
This text can be replaced with your
own text. This is a placeholder text.
Eliminate peak load sizing
Flexibility
High availability

How do I build an
enterprise
application ?
… better get API
Management in place.
Deployment, Billing,
Monitoring, Traffic
Management, Versioning, …

24
Enterprise Applications and Microservices
One Microservice – one
DB
Domain-driven Design
Use SAP HANA
Domain-driven Design
(Reality-driven)
Use of integration
servers
Right-size
microservices
Strict
Approach
Relaxed
Approach
No integration servers

25
Microservices as Integration
Technology
Mobile Apps
Microservices power small
apps with dedicated information
or provide services
Microservices as Enhancement
Strategy
Microservice Applications
A whole application is build
with microservices

Microservices Implementation Challenges
• Basic
 Security
 Logging
• Hexagonal Architecture
 Rest/ OData
 Web Services
 JMS
• Advanced Topics
 Circuit Breaker
 Throttling
 Retry
 Billing
 Management

Integration Scenarios
Connect to
Private Cloud/
Applications
Extend
S/4HANA
Connect to
S/4HANA
(Public Cloud)
SAP HANA
Cloud Platform

Identity Management
Identity Provider
FIORI, Microservices, HDB
SAP HANA Cloud Platform
Client
Delegate Authentification

Microservices – Persistence (e.g. JAVA)
HANA Native App
HANA
SAP ASE
JAVA App
JPA / JDBC

Microservice Example – Bringing it all together

Example application: msg.EventManagement
Organize
• Timeline
• To-Do List
• Attachments
• Contacts
Promote
• on SAP JAM
• via Email
• on Social media
Browse
• Upcoming events
• Calendar

Which technology is best suited?
• Open to any technology supported by the landscape.
Platform Services
SAP HANA Cloud Platform (PaaS)
Runtimes
Data & Storage Services
Development
Operations
IAAS
ASE HANA
UX
Security
Mobile
Integration
Analytics
IoT
CollaborationJava
XSJS
HTML5
Service Enablement | API Management
SAP Data Centers
Applications
SAP HANA Cloud Platform – Current Architecture

Characteristics of the development team
Multi-
disciplinary
Autonomous
DevOps
Self-
sufficient Team

Mobile Consumption of Microservices
HCP Mobile
Services
Cloud Apps
(OData)
Cloud Connector NW Gateway
SAP S/4HANA
SAP Appl.

.consulting .solutions .partnership
Dr. Michael Goetzfried
Principal IT Consultant
Michael.Goetzfried@msg-systems.com
msg systems ag (Headquarters)
Robert-Buerkle-Str. 1, 85737 Ismaning/Munich
Germany
www.msg-systems.com
Tudor Riscutia
Senior IT Consultant
Tudor.Riscutia@msg-systems.com

Enterprise Applications, Microservices and SAP HANA Cloud Platform

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