This document discusses Eclipse MicroProfile, a set of microservices frameworks and specifications for Java microservices. It begins by introducing concepts like microservices and reactive applications. It then covers key MicroProfile specifications like Config, Fault Tolerance, Metrics, Health Check, and JWT. It provides examples of using these specifications. It also discusses Java EE 8 integration and popular MicroProfile implementations. Finally, it describes a demo application using Payara Micro to demonstrate Java EE and MicroProfile features.

1. Eclipse MicroProfile para el desarrollador ocupado
Jorge Cajas - V´ıctor Orozco
11 de Abril de 2019
@cajasmota - @tuxtor
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2. Java EE - MicroProfile - Spring Boot - Docker
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3. ¿Microservicios?

4. ¿Microservicios?
¿Necesito migrar todo a microservicios? ¿Que pasa
si no utilizo microservicios? ¿Me estoy volviendo
viejo?
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5. Reactive applications
Aplicaciones reactivas
Microservicios son una (de muchas) herramienta para creaci´on de
aplicaciones reactivas
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6. Monolito - Escalabilidad
Figura 1: Mon´olito
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7. ESB
Figura 2: ESB
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8. Microservicios
Figura 3: Microservicios
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9. Java EE 8

10. Java EE 8
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11. Java EE 8
Java EE 8
• Integraci´on JSF-CDI
• Integraci´on JMS-CDI
• HTTP/2
• JSON-B
• Security
• JAX-RS Reactivo
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12. Java EE 8 - Comunidad Java EE
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13. Eclipse MicroProfile

14. Eclipse MicroProfile
Figura 4: Credito: Reza Rahman
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15. Eclipse MicroProfile
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16. Eclipse MicroProfile
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17. Eclipse MicroProfile - Implementaciones
Bibliotecas
• SmallRye (Red Hat)
• Hammock
• Apache Geronimo
• Fujitsu Launcher
JEAS - Fat Jar
• Dropwizard
• KumuluzEE
• Helidon (Oracle)
• Open Liberty (IBM)
• Apache Meecrowave
• Thorntail (Red Hat)
• Quarkus (Red Hat)
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18. Eclipse MicroProfile - Implementaciones
Micro server
• Payara Micro
• TomEE Plume
Full server
• Payara Application Server
• JBoss Application Server / Wildfly Application Server
• WebSphere Liberty (IBM)
https://wiki.eclipse.org/MicroProfile/Implementation
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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 ;
Ext. de la configuraci´on (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 de la existencia de metricas, las
metricas se exponen mediante Metrics
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25. Fault tolerance
Reglas de evaluaci´on y 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
¿Cuales?
• 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 en tiempo real
@Gauge(unit = "ExternalDatabases",name = "movieDatabases", absolute
= true)
public long getDatabases () {
return 99; //Any value
}
/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 id)
/metrics/application/movieDatabases
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31. Metrics- Timed
Desempe˜no y retraso
@Timed(name = "moviesDelay",
description = "Time to retrieve a movie",
unit = MetricUnits.MINUTES ,
absolute = true)
public Response findExpandedById (
@PathParam("id") final Long id)
/metrics/application/moviesDelay
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32. Metrics - Histogram
Distribuciones
@Inject
MetricRegistry registry;
@POST
@Path("/add/{ attendees}")
public Response addAttendees(
@PathParam("attendees") Long attendees) {
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
¿Estas vivo?
@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 tradicionales
• 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
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43. 12 factores cloud native (Heroku)
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. V´ıctor Orozco
• me@vorozco.com
• @tuxtor
• http://vorozco.com
• http://tuxtor.shekalug.org
This work is licensed under a
Creative Commons
Attribution-ShareAlike 3.0.
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