Bringing Reactive to Enterprise Application Developer // Reactive Summit 2018

Transcript

1. Bringing Reactive to
   Enterprise Java Developers
   Julien Ponge, Thomas Segismont and Clement Escoffier
   Red Hat
   

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2. Reactive Summit 2018
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   Hello!
   We work on Eclipse Vert.x, a toolkit for writing
   asynchronous and reactive applications on the JVM
   

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3. Reactive Summit 2018
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   (s a l p u )
   50% off with mlponge code
   

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4. Reactive Summit 2018
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5. Reactive Summit 2018
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   Vert.x MicroProfile Jakarta EE
   Introducing reactive to the EE world
   ...without breaking everything!
   

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6. Times change quickly
   

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7. Reactive Summit 2018
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   ‘14
   Java EE 8
   ‘17
   From Java EE to Jakarta EE
   ‘13
   Java EE 7
   ‘07
   JAX-RS
   ‘09
   CDI
   (Java EE 6)
   Microservices
   Docker
   Kubernetes
   Reactive
   manifesto
   ‘12
   Vert.x
   Node.js
   MVC 1.0
   ‘11
   Kafka Serverless
   

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8. Reactive Summit 2018
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   Typical use-case
   CRUD
   Database with ORM
   Development model
   CDI (injection)
   JAX-RS (REST API)
   JPA, Bean Validation,
   JTA, Management...
   Execution model
   Servlets
   1 thread per request
   Java EE: a feet in the past
   

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9. Reactive Summit 2018
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   Not cloud-friendly, not reactive
   Based on the concept of application server
   ➔ 1 server = many applications
   Does not fit the “cloud model”
   ➔ Small, lightweight applications
   ➔ Each service in its own process
   

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10. Reactive Summit 2018
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    Not cloud-friendly, not reactive
    Most of the model is synchronous except
    ● Asynchronous servlets
    ● CDI events
    Also:
    ➔ No stream support
    ➔ No back-pressure
    

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11. Reactive Summit 2018
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    A new hope?
    MicroProfile - the rogue child
    ➔ A new set of specs
    ➔ Microservice-friendly
    ➔ Very iterative
    ➔ Reactive working group!
    Jakarta EE
    ➔ New spec model
    ➔ Faster processes
    ➔ Growing interest for reactive
    

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12. Reactive and MicroProfile
    

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13. Reactive Summit 2018
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    Traction from: Lightbend, Red Hat, Oracle, IBM
    Reactive Microprofile specifications
    Reactive Streams Operators
    Reactive Messaging
    Concurrency
    

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14. Reactive Summit 2018
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    JAX-RS and reactive
    Stream data as SSE
    

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15. Reactive Summit 2018
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    Reactive Messaging (and data streaming)
    

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16. Reactive Summit 2018
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    Reactive Messaging (and data streaming)
    Manuel, pre and post
    processing
    

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17. Reactive Summit 2018
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    Reactive Stream Operators
    Compose and
    transform
    

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18. Demos*
    * no rabbits were harmed in the making of this.
    

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19. Reactive Summit 2018
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    Step #1
    RestEasy, server-sent events and reactive streams
    Server
    {sleeping, awake, eating}
    

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20. Reactive Summit 2018
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    Step #2
    Introducing MicroProfile Reactive Messaging
    HealthDataBean
    (temperature,
    heartbeat, pressure)
    Neo
    (sleeping, awake,
    eating)
    Processor
    state
    Health data
    Heartbeat
    

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21. Reactive Summit 2018
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    Step #3
    Introducing MicroProfile Reactive Streams Operators
    HealthDataBean
    (temperature,
    heartbeat, pressure)
    Processor
    Health data
    Heartbeat
    HTTP Client
    (Vert.x)
    Snapshot service
    (latest data)
    Health data
    Health data
    1 2
    

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22. Reactive Summit 2018
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    Step #4
    Health data comes from MQTT
    Processor
    Health data
    Heartbeat
    HTTP Client
    (Vert.x)
    Snapshot service
    (latest data)
    Health data
    Health data
    1 2
    MQTT
    

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23. Reactive Summit 2018
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    Step #5
    Event-driven and asynchronous microservices
    MQTT
    Kafka
    Collector service
    Snapshot service
    Web application
    Health data
    Events split
    by topic
    SSE
    HTTP
    Events
    

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24. Before we wrap up...
    

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25. Reactive Summit 2018
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26. Reactive Summit 2018
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    JAX-RS
    Vert.x
    CDI (Weld)
    RestEasy
    Reactive Messaging
    Vert.x-powered
    MQTT
    Apache Kafka
    Apache Camel
    AMQP 1.0
    Reactive Stream Ops
    Vert.x + RxJava2
    SmallRye
    

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27. Reactive Summit 2018
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    Roadmap
    ● MicroProfile Reactive Stream Operators
    ○ Approaching 1.0
    ○ Starting to infuse in the other MicroProfile specifications
    ○ Integration in the next MicroProfile release (February 2019)
    ● MicroProfile Reactive Messaging
    ○ Data streaming and Event-driven microservice
    ○ Integration in the next MicroProfile release (February 2019)
    ● MicroProfile Concurrency
    ○ Async context propagation
    

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28. Reactive Summit 2018
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    (s a l p u #2)
    50% off with mlponge code
    

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29. Q&A
    @jponge @tsegismont @clementplop
    

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30. THANK YOU
    plus.google.com/+RedHat
    linkedin.com/company/red-hat
    youtube.com/user/RedHatVideos
    facebook.com/redhatinc
    twitter.com/RedHat
    

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