Player 2 Ready: Micronaut, a Spring Boot competitor, #DevoxxUA_2018

img src: https://wallup.net/super-mario-bros-8-bit-super-mario-2/
SUPER
FRAMEWORK
BROS.
> PLAYER 1
> PLAYER 2 ... RDY?

whoami
background image src: https://images7.alphacoders.com/333/333222.jpg
@ipreferespresso
andrew.petryk@gmail.com
2
Andrew Petryk

Why I THINk i know things
@ipreferespresso
3

DISCLAIMER
Everything described here is true and complete to the
best of author’s knowledge.
All recommendations and inferences are made without
guarantee on the part of author.
The author disclaim any liability in connection with
the use of this information.
@ipreferespresso
4

?
princess java
Hello, %username%!
I need youR help!
image src: http://starsmedia.ign.com/stars/image/article/834/834987/princess-peach_420_1194999440.jpg @ipreferespresso
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Please,
only you can save me!
I was seized
and held hostage by
bloody enterprise
?
@ipreferespresso
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image src: http://starsmedia.ign.com/stars/image/article/834/834987/princess-peach_420_1194999440.jpg
princess java

The time is short!
We must use
microservices to get
rid of that monster!
?
@ipreferespresso
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princess java

Maybe someone
or something
can help you?
?
@ipreferespresso
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princess java

@ipreferespresso
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motivation
why
microservices?

@ipreferespresso
Why MICROSERVICES matters?
10

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WHAT we expect
from microservice?
> fast startup
> low memory consumption
> cloud ready
> easy to develop
EXPECTATIONS

what we have ?
1 curious developer
1 Life
APX 50 minutes
@ipreferespresso
12IT’S about time to start our
quest for java rescue

TO BEAT THE BLOODY ENTERPRISE
princess Java
@ipreferespresso
13IT’S about time to start our
quest for java rescue

LET THE JOURNEY BEGIN
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HARDCODE MODE ONLY!

our brave developer Java
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Java Developer
@ipreferespresso
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Assistance
princess peach Java
mentioned
that someone can help us
with microservices!
Who could that be?

@ipreferespresso
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Assistance
of course!
let’s use Spring!

image src: http://digitalspyuk.cdnds.net/16/30/480x240/landscape-1469624095-nintendo-mario.gif
..there was a time when Spring wasn’t a big
thinG...
but that time have changeD...
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JetBrain’s 2018 State of
Java Developer Ecosystem Survey
image src: https://www.jetbrains.com/research/devecosystem-2018/java/ @ipreferespresso
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SNYK.IO 2018 JAVA MAGAZINE
JVM Survey REPORT
image src: https://snyk.io/blog/jvm-ecosystem-report-2018 @ipreferespresso
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@ipreferespresso
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image src: http://www.bilan.ch/entreprises/elon-musk-parler-de-lui-une-interview-dejantee

Less Bugs,  
Smaller Time-to-Market,  
Less Complexity
@ipreferespresso
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Spring Developer

But, hey! SOMETHING is wrong!
Spring doesn’t have that fireballs!
@ipreferespresso
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Less Bugs,  
Less ComplexitySpring Developer

image src: https://i.kym-cdn.com/entries/icons/original/000/025/957/scoobbb.jpg
revealed! that’s a Spring boot!
@ipreferespresso
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Embedded Server
Spring
ASM
Environment
Executable JAR
SIMPLIFIED Spring Boot ANATOMY
@ipreferespresso
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@ipreferespresso
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LET’S CREATE A SIMPLE SPING BOOT app
image src:https://www.deviantart.com/nelde/art/Free-New-Paper-Mario-Demo-481194908

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@ipreferespresso
What we get?
A SIMPLE SPING BOOT app
hardware: MacBook Pro 2013 Late, 2.6 GHz Intel Core i5, 16 GB 1600 MHz DDR3, SSD

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MEMORY USAGE

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Less Bugs,  
Less Complexity
SpringBoot
Developer

image src: https://imgflip.com/i/hfpcf
Extreme
use
of
Reflection
Testing
might be the
hell of a
problem
relatively
LONG
STARTUP
TIME
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Tuning
requires really
deep knowledge

@ipreferespresso
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OOOPS!
more like Spring, But...
Maybe SOMEONE
ELSE can SAVE ME?
Do we have an alternative
to spRing boot?
?
princess java

YES! WE HAVE!
@ipreferespresso
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Welcome! Player 2 - Micronaut
ABOUT OCI MICRONAUT DOCS
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WHY not
HElidon/spark/RATPACK/vert.x ETC.
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Has own
cli/project generation
Dependency Injection
Supports java/groovy/kotlin
FULL-STACK FRAMEWORKS

WHY not
HElidon/spark/RATPACK/vert.x ETC.
@ipreferespresso
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u can download it from
http://micronaut.io/download.html
as binary
OR
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how to GET started

u can download it from
http://micronaut.io/download.html
as binary
OR
u can use
@ipreferespresso
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how to GET started

@ipreferespresso
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how to GET started

DESIGNED TO BE COOL
FROM THE VERY BEGINNING
MICRONAUT was designed
CONSIDERING PREVIOUS
SPRING AND GRAILS
EXPERIENCE,
BUT ALSO
with microservices AND
CLOUD in mind
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DESIGNED TO BE COOL
REACTIVE NATURE
Build on top of
by default use
event-loop model
@ipreferespresso
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but
will switch to
pre-configured
I/O thread pool
when blocking is needed

DESIGNED TO BE COOL
@ipreferespressoimage src: https://www.techempower.com/benchmarks/#section=data-r17&hw=ph&test=json
according to TechEmpower web framework
benchmark
Micronaut  
is pretty solid in terms of  
JSON serialization
Benchmark Round 17/ 2018-10-30
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DESIGNED TO BE COOL
with cloud in heart
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P.S.The list described on the slide is not exclusive or full

@ipreferespresso
COMPETITION
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image src: http://animated-video-games-muscular.wikia.com/wiki/Mario
But Spring Boot provides
all of this too,
and many more.
And is already production
proven.
What can be a game-changer?
BOOT

@ipreferespresso
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image src: https://giphy.com/gifs/trolli-luigi-mario-kart-8-death-stare-yc6LwDe1NmOsM
LET’s FIND OUT!

@ipreferespresso
THE PART WHERE PLAYER 2... READY?
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and again HARDCODE MODE ONLY!

@ipreferespresso
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image src: https://gfycat.com/uk/gifs/detail/DeafeningAllGermanshepherd

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Micronaut Developer
problems,
insomnia,
disturbing thoughts

@ipreferespresso
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FIRST MICRONAUT APP

@ipreferespresso
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FIRST MICRONAUT APP

FIRST MICRONAUT APP
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FIRST MICRONAUT APP
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FIRST MICRONAUT APP
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What we get?
@ipreferespresso
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Micronaut from scratch
hardware: MacBook Pro 2013 Late, 2.6 GHz Intel Core i5, 16 GB 1600 MHz DDR3, SSD

MEMORY USAGE
@ipreferespresso
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java: Java(TM) SE Runtime Environment (build 1.8.0_181-b13)Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

hardware: MacBook Pro 2013 Late, 2.6 GHz Intel Core i5, 16 GB 1600 MHz DDR3, SSD @ipreferespresso
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What About extreme env?

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image src: https://pp.userapi.com/c841520/v841520753/6b0ce/gehIwIHd6JA.jpg

FIRST IMPRESSION
At first, you may think that
Micronaut looks something like this
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FIRST IMPRESSION
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IN COMPILATION WE TRUST
BUT WHAT MAKES the DIFFERENCE?
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Compile-time Dependency injection,
AHEAD-OF-TIME AOP FRAMEWORK,
and compile-TIME auto-configurations.
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AnnoTATion
processor
AST
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@ipreferespresso
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SPRING MICRONAUT
COMPILE
RUN
SCAN CLASSPATH
CGLIB/Proxy
COMPILE
INJECT
RUN/
New Instance
INJECT

@ipreferespresso
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Spring Interlope
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SPRING INTERLOPE
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MIcronaut test
@ipreferespresso
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@ipreferespresso
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GRAALVM
Micronaut has built-in support for GraalVM
While spring boot is all about DIY and has some issues
with Graal(svm) atm

right tool for the job
@ipreferespresso
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> Fast startup time
> Easy testing
> compile-time config
@ipreferespresso
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> LOW footprint
WHY MN rock?

Spring DO HELP US TO BEAT ENTERPRISE
BUT...
@ipreferespresso
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MEANWHILE IN ANOTHER CASTLE
@ipreferespresso
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instead of conclusion
Micronaut and Spring Boot ain’t foes.
They both solve the same problem - help
developer to focus on Business problems and not
on infrastructure.
And they both do it pretty well.
@ipreferespresso
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THAT’s all, FOLKS!
Q&A
image src:https://i.ytimg.com/vi/7RZQRt5_33k/maxresdefault.jpg @ipreferespresso
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Player 2 Ready: Micronaut, a Spring Boot competitor, #DevoxxUA_2018

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