Microservices, Clouds, Serverless - all of this are nowadays buzz-words. It’s a trend of today’s software reality to break a monolith into microservices and deploy them to cloud. And how java developers deal with such things? With the help of Spring and Spring Boot, which become a major player, de-facto, a standard in the industry. But Spring, besides all the goodies it provides, was never designed with the Microservice approach in mind. But the most crucial thing - there are no real competitors to Spring & SpringBoot. Without good rivalry, further progress is slower (or even doubtful). In my talk, we compare the Spring & SpringBoot with new java framework - Micronaut. We will see how less memory Micronaut can consume and how much faster is its startup time compared to a similar SpringBoot app. And also we will find out that the best practices and concepts from SpringBoot are valid citizens in Micronaut which makes a learning curve really short.

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

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

3. Why I THINk i know things
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4. 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
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5. ?
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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6. Please,
only you can save me!
I was seized
and held hostage by
bloody enterprise
?
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image src: http://starsmedia.ign.com/stars/image/article/834/834987/princess-peach_420_1194999440.jpg
princess java

7. The time is short!
We must use
microservices to get
rid of that monster!
?
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image src: http://starsmedia.ign.com/stars/image/article/834/834987/princess-peach_420_1194999440.jpg
princess java

8. Maybe someone
or something
can help you?
?
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image src: http://starsmedia.ign.com/stars/image/article/834/834987/princess-peach_420_1194999440.jpg
princess java

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motivation
why
microservices?

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

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

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

14. LET THE JOURNEY BEGIN
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HARDCODE MODE ONLY!

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

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Assistance
of course!
let’s use Spring!

19. 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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20. JetBrain’s 2018 State of
Java Developer Ecosystem Survey
image src: https://www.jetbrains.com/research/devecosystem-2018/java/ @ipreferespresso
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21. SNYK.IO 2018 JAVA MAGAZINE
JVM Survey REPORT
image src: https://snyk.io/blog/jvm-ecosystem-report-2018 @ipreferespresso
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22. Spring ?!
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image src: http://www.bilan.ch/entreprises/elon-musk-parler-de-lui-une-interview-dejantee

24. Less Bugs,
Smaller Time-to-Market,
Less Complexity
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Spring Developer

25. But, hey! SOMETHING is wrong!
Spring doesn’t have that fireballs!
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Less Bugs,
Smaller Time-to-Market,
Less ComplexitySpring Developer

26. image src: https://i.kym-cdn.com/entries/icons/original/000/025/957/scoobbb.jpg
revealed! that’s a Spring boot!
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27. Embedded Server
Spring
ASM
Environment
Executable JAR
SIMPLIFIED Spring Boot ANATOMY
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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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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,
Smaller Time-to-Market,
Less Complexity
SpringBoot
Developer

32. 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

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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

34. YES! WE HAVE!
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35. Welcome! Player 2 - Micronaut
ABOUT OCI MICRONAUT DOCS
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36. 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

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

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

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how to GET started

41. 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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42. DESIGNED TO BE COOL
REACTIVE NATURE
Build on top of
by default use
event-loop model
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but
will switch to
pre-configured
I/O thread pool
when blocking is needed

43. 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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44. 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

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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

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

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

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Micronaut

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

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Micronaut Developer
problems,
insomnia,
disturbing thoughts

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FIRST MICRONAUT APP

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FIRST MICRONAUT APP

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

57. MEMORY USAGE
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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)

58. 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

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

66. IN COMPILATION WE TRUST
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67. Spring Interlope
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68. SPRING INTERLOPE
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69. MIcronaut test
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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

71. GRAALVM
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72. GRAALVM
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73. right tool for the job
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74. > Fast startup time
> Easy testing
> compile-time config
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> LOW footprint
WHY MN rock?

75. Spring DO HELP US TO BEAT ENTERPRISE
BUT...
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77. MEANWHILE IN ANOTHER CASTLE
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79. 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.
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81. THAT’s all, FOLKS!
Q&A
image src:https://i.ytimg.com/vi/7RZQRt5_33k/maxresdefault.jpg @ipreferespresso
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