Microservices with JBoss EAP & OpenShift

Oct 17, 20161 like823 views

This document discusses microservices and how JBoss EAP and OpenShift can help implement them. It notes that microservices help define architecture, allow independent release cycles, and accelerate business velocity. Each microservice should do one thing well with well-defined inputs and outputs. This leads to loosely coupled implementations and locations. The document recommends that a bounded context, or microservice, should solve a problem that less than 8 people could handle. It provides examples of microservices for a conference application. JBoss EAP and WildFly Swarm can help implement microservices by wrapping servers around individual services while still providing capabilities like JAX-RS, CDI, JMS and more.

Microservices
with
JBoss EAP & OpenShift
(and more)
Bob McWhirter

Who is Bob?
• Bob McWhirter
• Project lead for WildFly Swarm
• Founder of…
• Drools
• The Codehaus
• TorqueBox
• Director of Research & Prototyping, JBoss

Microservices with JBoss EAP & OpenShift

• Helps deﬁne architecture
• Independent release cycles
• Accelerate business velocity

• Each service does one thing
well,with well-deﬁned bounds
• If it used to be a library, it’s
probably a service now

ServiceWell-deﬁned
Inputs
Well-deﬁned
Outputs

• Loosely coupled implementations
• Loosely coupled locations

“organizations which design
systems ... are constrained to
produce designs which are copies
of the communication structures of
these organizations"
–Melvin Conway

A
monolithic organization
produces
monolithic software

A meeting should never have so many
attendees that they could not all be fed
with two pizzas.
Generally, this limits the number of
attendees at a meeting to less than
eight.

Therefore, your bounded-context
should be something solvable by
less than 8 people…
including the Product Manager.

From the MicroProﬁle example
• Sessions
• Speakers
• Schedules
• Attendees

If you failed at SOA,
you’re probably going to fail at
microservices.

Monthly/Weekly/Hourly
releases
of 200 microservices
is not easy

Because what’s tested is
exactly what should be
deployed

If you’re deploying
continuously, you should be
building continuously

If you’re deploying
continuously, automated
provisioning is useful

And things like OpenShift can
provide cross-cutting
functionality

95% of
My App
JBoss EAP
Service
#1
JBoss EAP
Network

90% of
My App
JBoss EAP
Service
#1
JBoss EAP
Network
Service
#2
JBoss EAP
Network

Service
#2
Service
#5
Service
#4
Service
#1
Service
#3

• Wraps the server around your service.
• Built upon WildFly/EAP.
• Smaller footprint.
• Single deployable artifact.

JAX-RS
CDI
JMS
JPA
Batch
Bean Validation
JCA
JMX
Naming
…more!

Jolokia
NetﬂixOSS
Logstash
Keycloak/Red Hat SSO
Swagger

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Microservices with JBoss EAP & OpenShift

1. Microservices with JBoss EAP & OpenShift (and more) Bob McWhirter

2. Who is Bob? • Bob McWhirter • Project lead for WildFly Swarm • Founder of… • Drools • The Codehaus • TorqueBox • Director of Research & Prototyping, JBoss

3. Microservices

5. • Helps deﬁne architecture • Independent release cycles • Accelerate business velocity

6. All of this requires discipline

8. • Each service does one thing well,with well-deﬁned bounds • If it used to be a library, it’s probably a service now

9. ServiceWell-deﬁned Inputs Well-deﬁned Outputs

11. • Loosely coupled implementations • Loosely coupled locations

12. Which leads us to …

14. “organizations which design systems ... are constrained to produce designs which are copies of the communication structures of these organizations" –Melvin Conway

15. A monolithic organization produces monolithic software

16. Which leads us to …

18. A meeting should never have so many attendees that they could not all be fed with two pizzas. Generally, this limits the number of attendees at a meeting to less than eight.

19. Therefore, your bounded-context should be something solvable by less than 8 people… including the Product Manager.

21. From the MicroProﬁle example • Sessions • Speakers • Schedules • Attendees

24. Caveats…

25. If you failed at SOA, you’re probably going to fail at microservices.

26. Monthly/Weekly/Hourly releases of 200 microservices is not easy

27. Things that can help

29. Because what’s tested is exactly what should be deployed

31. If you’re deploying continuously, you should be building continuously

33. If you’re deploying continuously, automated provisioning is useful

34. And things like OpenShift can provide cross-cutting functionality

35. So you want to write a microservice…

37. My App JBoss EAP