SpringOne Platform 2017 Rohit Kelapure, Pivotal; Joe Szodfridt, Pivotal; Shaun Anderson, Pivotal Are fire-breathing monoliths lurking throughout your Enterprise? Many of these ancient behemoths can be millions of lines long and can wreak havoc when trying to evolve and transform your business. Unfortunately, your business depends on services they provide, so they can’t just be eliminated without a battle plan. The Pivotal App Transformation practice has continuously refined approaches and techniques to slay your monoliths. In this session, we will discuss how to carve up your legacy dragons into manageable pieces using techniques and patterns such as Event Storming, Strangling, Starving, Slice Analysis and Domain Driven Decomposition. Monolith slaying is not easy, but with the right tools and weapons at your disposal, your journey to the Cloud can be as easy as a stroll through the forest.

1. Tools to Slay the Fire Breathing
Monoliths in your Enterprise
By Shaun Anderson, Rohit Kelapure, Joe Szodfridt
@swiftbird68 @rkela @JoeSzodfridt
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2. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 2
μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvcμSvc
Benefits
More resilient
systems
Increased speed
to market
Scaling on
demand
...to name
a few
Resources
Courses
Websites
...etc.
Books
Cloud Native Architecture

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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 3
But.... What about existing apps?
Business critical
Run the business
Generate $$$
Often big, nasty monoliths
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4. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvc
μSvcμSvc
?
Code
+
Process & Methodology Tools
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5. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Shaun, Rohit and Joe
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Adapting & Developing Tools
+ +
Pivotal Labs App Transformation
Transforming where the world runs software
45+
Transformation
Engagements
~600 of
Transformation
Recipes
Recognizable
Customers
3+ Years
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6. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 6
Working
Code
Slices
Patterns
OKRs
Event Storming
Slice Analysis
Boris
Snap/SnapE
Implementation
Patterns
rinse&repeat

7. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 7
OKRs

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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Ambitious
8
Where to?
Objectives
Key Results
+
-
%
#
Are we going
the right
way?
AppTx
70 - 80%

9. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 9
Mission: Reduce time to onboard new customers
Config Customer Test
Environment Quicker
Incrementally Handle
PROD traffic
Create Guidance for
App Transformation
1 Process state
migrated to PCF
1 State transition from
PCF to legacy env.
Reduce manual steps by
25%
Setup & complete
< 2 day
Reduce # of tools used
by 1/3
1 Central cookbook of
transformation recipes
5 Testing guidelines
10 Spring Boot
templates

10. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Could Measure Should Measure
10
Objectives Key Results
brainstorm
group
brainstorm decide
order
define

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Confidence Indicators
Monitor by Status and Confidence

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Monitor by Objective and Key Result

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OKRs
Event Storming

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Simple Tools

15. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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Bounded Context
Seats
Payment
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Aggregate
Aggregate
Aggregate
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
!
Domain
Event
Relevant Business Event
“Seat Chosen”, “Ticket Purchased”
Aggregate
Brains
Accepts Actions / Generates “Events”
Domain
EventDomain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Domain
Event
Slice candidate
Command
Command
?

16. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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Making Sense of a
Huge Mess
Reveal Bounded
Contexts
Explore Domains
Identify Potential
“Slices”
Expose Core
Domains
Identify Potential
Trouble Spots
Enable Cross
Perspective
Conversation
Identify Potential
Starting Points

17. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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18. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 18
OKRs
Event Storming
Boris

19. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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More Tools

20. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 20
Service
Service based on
Context
Payment Service”
Queue
Message
Queue
“Seat Request”
UI External
Link to
External
System
Service
Service
Service
Service
Service
Service
Ext
Ext
Q
Q
Q
UI
UI

21. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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22. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 22

23. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
SnapE
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API Data Source /
Storage
UI Risks
Stories
Rabbit
MQ
REST /
JSON
CICS
GW
Other
Purchase
History
AdminUI
Dependent
On...
GET
/purchasesGET
/purchasesGET
/purchases

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Inform Architecture Event Flow
Contexts to µService API Discovery
Scenario Modeling Orchestration to
Choreography
Validate Slice
Candidate
Fill the Backlog

25. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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OKRs
Event Storming
Slice Analysis
Boris

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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Map technology
stack with C4
diagrams
Explore the ideal end
state
Affinity Mapping, Dot
Voting
The Right Vertical Slice
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Big Picture Event
Storming
Process Modelling
Identify & Prioritize
Bottlenecks
Progressively drill from abstract >> specific

27. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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OKRs
Event Storming
Slice Analysis
Boris
Snap/SnapE

28. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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29. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
SNAP
29

30. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
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OKRs
Event Storming
Slice Analysis
Boris
Snap/SnapE
Implementation
Patterns

31. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 31
Class Decorators,
AOP, AspectJ,
Javaagents
Feature Flags,
Dynamic Routing,
Dark Launching
API Gateway, Edge
Server, B4FFInverse Conway
Event Shunting ACL, Context
Mapping, Strangler
Bridge, Router,
Proxy, Facade
Eventual
Consistency, Sagas,
ESB >>
microservices
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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Strangler Pattern
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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Strangler Pattern
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Cloud Foundry For
Developers
Rahul Jain, David Wu,
Rick Farmer

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NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Event Shunting
34

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Anti-Corruption Layer
35
Cloud Foundry For Developers Rahul Jain, David Wu, Rick Farmer

36. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 36

37. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Ecosystem
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Spring
Framework
Spring
Security
Spring
Data
Spring
Batch
Spring
Integration
Project
Reactor
Spring
AMQP
Spring
Web Services
Spring
Web Flow
Spring
Boot
Spring
Kafka
Spring
Cloud

38. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-
NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 38
Working
Code
Slices
Patterns
OKRs
Event Storming
Slice Analysis
Boris
Snap/SnapE
Implementation
Patterns
rinse&repeat
Direction / Stay on Track
Business Flow / Potential Slices
Event Flow / Inform Architecture
Small Pieces
of Functionality
Size / Risk
Repeatable Recipes

39. Learn More. Stay Connected.
39
#springone@s1
p
sanderson@pivotal.io rkelapure@pivotal.io jszodfridt@pivotal.io