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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
• Helps define architecture
• Independent release cycles
• Accelerate business velocity
All of this requires
discipline
• 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
Which leads us to …
“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
Which leads us to …
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
Caveats…
If you failed at SOA,
you’re probably going to fail at
microservices.
Monthly/Weekly/Hourly
releases
of 200 microservices
is not easy
Things that can help
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
So you want to write a
microservice…
My App
JBoss EAP
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
If I have 45 small
services, why EAP?
• 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
Service
#2
Service
#5
Service
#4
Service
#1
Service
#3
Thanks!

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Microservices with JBoss EAP & OpenShift