Getting the most out of JavaOne 2016 is a full-time job. Our ACA IT-Solutions experts visited the JavaOne conference and came back with their 10 most important key learnings of the JavaOne conference.

1. KEY LESSONS
01 2016
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2. 1
Type @nnotations are an
underrated feature of Java 8
Type annotations can be to add metadata to your codebase. Enabling better compile
time validation through static analysis and detecting unintended use of your code; a
quality booster. See http://types.cs.washington.edu/checker-framework/
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3. 2Web frameworks have a lifespan of 1,5 to 2 year. Something to keep in
mind while designing”Ten Essential Building Blocks of JavaScript in the
Enterprise by GeertjanWielenga
Web Frameworks have a short lifespan
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4. You need to know where mutation happens in your code. Objects returned at
the microservice boundary should always be immutable. Refactoring
Monoliths to Microservices with Functional Programming
by James Ward
3
Immutability as an important enabler
for the migration to microservices
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5. ‘Lambda's are the gateway for
being lazy’ Venkat Subramaniam
Lambda’s allow for lazy evaluation. Only the terminal operation causes
evaluation of the intermediate operations.This makes streams very efficient.
Start passing streams instead of collections.
4
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6. Follow up on the major releases
of development tools
jUnit 5 finally allows for multiple extensions.
Jenkins 2 has advanced pipeline features.
Leverage Docker Containers to setup your
build tools. Evaluate JGiven as a BDD
framework
5
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7. Hystrix makes the dependencies between different services visible.
Hystrix has its benefits, even when there is no fallback possible.
Operational Excellence with Netflix Hystrix
by BillyYuen
Hystrix primary use inside
is for monitoring dependencies
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8. Would hypermedia benefit
from further standardization?
There is no standard in the making for Hypermedia.Will standardization
eventually lead to better tool support/documentation or limit freedom? - Putting
Hypermedia Back in REST with JAX-RS by Sebastian Daschner
7 ACA IT-SOLUTIONS | © 2016

9. 8
HystrixAgent is a
hidden gem
HystrixAgent allows you to detect all outgoing
network calls in your code. This can be used to detect
what should be wrapped by a circuit breaker. It can
also detect regressions during continuous integration.
Operational Excellence with Netflix Hystrix
by Billy Yuen
ACA IT-SOLUTIONS | © 2016

10. 9 ACA IT-SOLUTIONS | © 2016
Smoothen the transition to Java 9:
start analysing your code with jdeps today
Java 9 will properly hide the internal JDK packages.
It is never too early to start eliminating your technical depth.

11. Chase the Wizard out of Oz
to deploy faster
Apply the Oz Principle; your experiences become the beliefs which fuel your actions.This gives
give you the result to deploy faster. Set an achievable goal the team believes and take concrete
action to improve further. - Repairing a Confluence of BrokenWindows byVincent Kok
Background - http://www.larrykeiter.com/site/?p=1653
10 ACA IT-SOLUTIONS | © 2016

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