Java2 days -_be_reactive_and_micro_with_a_microprofile_stack

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Payara

Be reactive and micro with a MicroProfile stack https://www.payara.fish/

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BE REACTIVE AND MICRO
WITH A MICROPROFILE
STACK
Ondro Mihályi
@OMIHALYI

WHAT IS MICROPROFILE?
open-source specification for Java
microservices ( )microprofile.io
@OMIHALYI

GOALS TO SOLVE
Better user experience
save resources/costs
keep up with massive loads
handle/recover from FAILURES
@OMIHALYI

REACTIVE IN A NUTSHELL
Traditional - single thread
@OMIHALYI

REACTIVE IN A NUTSHELL
Reactive - not bound to a thread
@OMIHALYI

REACTIVE PIPELINE
→ incoming request
→ subscribe
→ process
→ publish (data/error)
@OMIHALYI

REACTIVE SUPPORT IN
MICROPROFILE 2.0
Reactive REST & SSE (JAX-RS)
Async CDI events
Monitoring via Metrics
@OMIHALYI

HOW MICROPROFILE FITS THE
PIPELINE
REACTIVE JAX-RS
subscribe to REST requests and responses
publish REST responses
SERVER-SENT EVENTS (JAX-RS) - publish via HTTP
ASYNC CDI EVENTS - publish to other components
MONITORING via Metrics - publish metrics to external systems
@OMIHALYI

WHAT'S MISSING?
PROCESSING streams of messages
connect suscribers to publishers
PUBLISH and SUBSRIBE to message
queues/topics
connect decoupled publishers to
subscribers
@OMIHALYI

MORE TO COME IN MICROPROFILE
PROCESSING streams of messages
Reactive operators -
PUBLISH and SUBSRIBE to message queues/topics
Reactive Messaging -
Bonus:
Asynch. Fault Tolerance interceptors
release candidate
draft API
@OMIHALYI

WE'LL ADD MORE FROM JAVA EE 8
Message-Driven Beans
via
PUBLISH and SUBSRIBE to
message queues/topics
Kafka JCA connector
@OMIHALYI

WE'LL FILL WHAT'S MISSING
RxJava (Reactive Streams)
PROCESSING streams of messages
asynchronous Fault Tolerance
React.js
turn message stream into UI update
@OMIHALYI

AND RUN WITH PAYARA MICRO
JAVA EE and MICROPROFILE together
executable JAR, <70 MB
easy to run apps with no installation
command line, maven plugin
build uber JAR
https://payara.fish
@OMIHALYI

DEMO
Source: https://github.com/OndrejM-demonstrations/Reactive-and-Micro-
with-MicroProfile-and-Payara
@OMIHALYI

FURTHER RESOURCES
JCA Cloud Connectors:
MicroProfile Reactive Operators:
https://github.com/payara/Cloud-
Connectors
https://github.com/eclipse/microprofile-
reactive-streams
@OMIHALYI

THANK YOU!
Ondro Mihalyi ( )
Working for Payara
MicroProfile project member
Eclipse Foundation and JCP member
Czech JUG leader
ondro.inginea.eu
@OMIHALYI

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