This document discusses Eclipse MicroProfile and how it can help busy Java developers build microservices applications. It provides an overview of MicroProfile including configurations, fault tolerance, metrics, health checks, JWT authentication, and type-safe interfaces. It also describes a demo application built with Java EE, MicroProfile, Payara Micro, and factors for external concerns like deployment and orchestration. The document concludes with a brief discussion of Oracle Cloud.

1. Eclipse MicroProfile for the Busy Developer
V´ıctor Orozco
6 de Dezembro de 2018
@tuxtor
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2. Java EE - MicroProfile - Spring Boot - Docker
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3. V´ıctor Orozco
• 10 anos em Java EE
• CTO@Nabenik
• @tuxtor
• http://vorozco.com
• http://tuxtor.shekalug.org
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4. Microservicios?

5. Microservicios?
Preciso migrar tudo para microservicios? O que
acontece se n˜ao consigo utilizar microservicios?,
estou ficando velho?
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6. Reactive applications
Aplicativos reativos
Microservicios s˜ao uma ferramenta para um estilo novo de
arquitetura.
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7. Mon´olito
Figura 1: Mon´olito
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8. ESB
Figura 2: ESB
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9. Microservicios
Figura 3: Microservicios
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10. Java EE 8

11. Java EE 8
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12. Java EE 8
Java EE 8
• Melhor integra¸c˜ao JSF-CDI
• Melhor integra¸c˜ao JMS-CDI
• HTTP/2
• JSON-B
• Security
• JAX-RS Reativo
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13. Java EE 8 - A comunidade da um passo `a frente
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14. Eclipse MicroProfile

15. Eclipse MicroProfile
Figura 4: Credito: Reza Rahman
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16. Eclipse MicroProfile
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17. Eclipse MicroProfile
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18. Eclipse MicroProfile - Implementa¸c˜oes
• Thorntail (Red Hat)
• KumuluzEE
• Open Liberty (IBM)
• TomEE
• Helidon (Oracle)
• Hammock
• Apache Meecrowave
• Payara Micro
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19. Eclipse MicroProfile on Payara 5
<dependency >
<groupId >org.eclipse.microprofile </ groupId >
<artifactId >microprofile </ artifactId >
<type >pom </type >
<version >2.0.1 </ version >
<scope >provided </scope >
</dependency >
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20. Config
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21. Config
@Inject
@ConfigProperty (name = "omdbservice.url")
String omdbDaemonServiceUrl ;
Externaliza¸c˜ao da configura¸c˜ao (VM, Docker, Kubernetes)
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22. Fault Tolerance
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23. Metrics
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24. Fault Tolerance + Metrics
• Fault Tolerance depende da existˆencia de m´etricas, que
podem ser utilizadas para diagnose do nosso sistema expondo
os n´umeros mediante Metrics
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25. Fault tolerance
Regras de avalia¸c˜ao e alternativas
• Circuit Breaker
• Bulkhead
• Retry
• Timeout
• Fallback
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26. Fault tolerance - Fallback, Timeout
@GET
@Path("/{id:[a-z]*[0 -9][0 -9]*}")
@Fallback(fallbackMethod = " findByIdFallBack ")
@Timeout(TIMEOUT)
public Response findById(@PathParam("id")
final String imdbId) {
...
}
public Response findByIdFallBack (@PathParam("id")
final String imdbId) {
...
}
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27. M´etricas
• JSON or OpenMetrics (Prometheus)
• Vendor
• Base
• Application
¿Quais?
• Counted
• Gauge
• Metered
• Timed
• Histogram
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28. Metrics - Counted
@Inject
@Metric
Counter failedQueries;
@GET
@Path("/{id:[a-z]*[0 -9][0 -9]*}")
@Fallback(fallbackMethod = " findByIdFallBack ")
@Timeout(TIMEOUT)
public Response findById(@PathParam("id")
final String imdbId) {
...
}
public Response findByIdFallBack (@PathParam("id")
final String imdbId) {
...
failedQueries.inc ();
}
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29. Metrics - Gauge
Inc-dec em tempo real
@Gauge(unit = " ExternalDatabases ", name = " movieDatabases",
public long getDatabases () {
int number = (int)( Math.random () * 100);
int criteria = number % 2;
if(criteria == 0) {
return 100;
}else {
return 50;
}
}
/metrics/application/movieDatabases
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30. Metrics - Metered
Events rate
@Metered(name = " moviesRetrieved ",
unit = MetricUnits.MINUTES ,
description = "Metrics to monitor movies",
absolute = true)
public Response findExpandedById (@PathParam("id") final Long
/metrics/application/movieDatabases
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31. Metrics- Timed
Desempenho e delay
@Timed(name = "moviesDelay",
description = "Metrics to monitor the times of movie
unit = MetricUnits.MINUTES ,
absolute = true)
public Response findExpandedById (@PathParam("id") final Long
/metrics/application/moviesDelay
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32. Metrics - Histogram
Distribui¸c˜oes
@Inject
MetricRegistry registry;
@POST
@Path("/add/{ attendees}")
public Response addAttendees(@PathParam("attendees") Long at
Metadata metadata =
new Metadata("matrix attendees",
MetricType.HISTOGRAM );
Histogram histogram =
registry.histogram(metadata );
histogram.update(attendees );
return Response.ok(). build ();
}
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33. Health Check
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34. Health Check
Ta vivo ainda?
@Override
public HealthCheckResponse call () {
return HealthCheckResponse .named("TaVivoAinda")
.withData("key1", "val1")
.withData("key2", "val2")
.up()
.build ();
}
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35. JWT
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36. JWT
@LoginConfig(authMethod = "MP -JWT")
public class ApplicationConfig extends Application {
}
@Inject
private JsonWebToken jwtPrincipal;
@Inject
@Claim("email")
private String email;
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37. TypeSafe
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38. TypeSafe
@Path("/playlist")
@Consumes("application/json")
public interface MusicPlaylistService {
@GET
List <String > getPlaylistNames ();
@PUT
@Path("/{ playlistName}")
long updatePlayList(@PathParam("playlistName")
String name ,
List <Song > playlist)
throws UnknownPlaylistException ;
}
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39. Demo

40. EE + MicroProfile - Demo
Java 8, JAX-RS, CDI, EJB,
MicroProfile
https://github.com/tuxtor/payara-demo
https://github.com/tuxtor/omdb-demo
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41. Payara Micro - Java EE 8
Stacks tradicionais
• EJB
• JTA
• JAX-RS
• CDI
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42. EE + MicroProfile - Demo
MicroProfile: JAX-RS, CDI, Config, Fault Tolerance, Metrics
Payara Micro: EJB, JTA
Fatores externos: Location, Deployment, Orchestation, Balancing, Consistency,
Patterns
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43. 12 fatores
Microprofile
• Config
• Backing service
• Disposability
Cloud
• Codebase (Git-Flow)
• Dependencies (Maven)
• Build, Release, Run
• Processes (Pipelines)
• Port binding
• Concurrency (Docker - k8s)
• Dev / Prod parity
• Logs
• Admin process
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44. Oracle Cloud
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45. Oracle Cloud
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46. Oracle Cloud
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47. Oracle Cloud
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48. Obrigado
• me@vorozco.com
• @tuxtor
• http://vorozco.com
• http://github.com/tuxtor/slides
This work is licensed under a Creative Commons
Attribution-ShareAlike 3.0.
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