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Utilizing JSF Front Ends with Microservices
The document discusses utilizing Jakarta Server Faces and Jakarta RESTful Web Services to build front ends for microservices. It provides an overview of the technologies and frameworks, including new features of JSF 2.3 and Jakarta RESTful Web Services. It then demonstrates how to create a simple RESTful service using JAX-RS and JPA, and build a JSF front end to communicate with the service and display database data. The presentation recommends approaches for writing and modifying data via REST, securing services, and using various Java EE and third-party libraries.
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Utilizing JSF Front Ends with Microservices
- 1. Utilizing JSF Front Endsw Microservices Code Smarter Josh Juneau Apress and Java Magazine Author JCP Member, Apache NetBeans Contributor, Java Champion, Jakarta EE Ambassadors
- 2. About Me • Developer,DBA, System Administrator • Author, Speaker, Podcaster • Java Champion • Apache NetBeans Developer • Jakarta EE Ambassadors
- 3. Agenda • Primer onnewer features of Jakarta Server Faces and Jakarta RESTful Web Services • Simple services utilizing Jakarta EE specifications. • Basic Jakarta Server Faces front end to display and update data via RESTful web services. • Incorporation of JSF frameworks to build robust front ends.
- 4. How to GetStarted Today • Download Eclipse GlassFish 5.1.0 (Utilize Payara 5.194+ for JDK 11 support) • https://projects.eclipse.org/projects/ ee4j.glassfish • Include Jakarta EE 8 dependencies into your project • Great examples: • https://github.com/juneau001/JakartaEE-Playground • https://projects.eclipse.org/projects/ee4j.jakartaee-platform/
- 5. Jakarta EE 8Overview • Continued enhancements for productivity and web standards alignment • Better alignment with Java SE 8 • Work towards a better platform for development of microservices
- 6. Jakarta Server Faces •Enhanced CDI Alignment • WebSocket Integration • Ajax Method Invocation • Class LevelValidation • Java 8 Date-Time • Iterable/Map/Custom UIData Support • Component Search Expressions • Radio Button • styleclass on h:column • Basic Support for Extensionless URLs New Features with 2.3
- 7. Utilize Date-Time API Makeuse of the <f:convertDateTime /> tag. New type attribute values on <f:convertDateTime>: • localDate, localTime, localDateTime • offsetTime,offsetDateTime, zonedDateTime
- 8. Jakarta Server Faces3.0 • Removal of old cruft • JSF’s own expression language • Managed Beans • Move more artifacts towards CDI • Action Model (Not to compete with Krazo) • Extensionless Mapping
- 9. Resource Injection Inject JSFartifacts in JSF 2.3, and even possible to inject into other JSF artifacts. @Inject private ExternalContext externalContext; @Inject private ServletContext servletContext;
- 10. How it Works JSF2.3 provides default producers for many of the most commonly used JSF artifacts, therefore, we can now inject rather than hard-code. Converters, validators and behaviors are now also injection targets.
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- 12. Jakarta API forRESTful Web Services • Improved CDI Integration • Reactive Client API • Non-Blocking I/O • https://github.com/jax-rs/spec
- 13. • Server SentEvents • One way communication channel • Text protocol,“text/event-stream” media type • Multiple messages • Retry interval Jakarta API for RESTful Web Services
- 14. Building a Simple Service •JAX-RS • JPA • BeanValidation
- 15. Using JSF forFront End • Model: Model Classes • View: Facelets • Controller: CDI Beans • Wire together with Expression Language
- 16. Front End Service •Utilize JAX-RS (RESTful Web Services) client • All database work occurs within the microservice (JPA, EJB if needed) • Utilize JAX-RS to provide data to client
- 17. JAX-RS Client Client client= ClientBuilder.newClient(); WebTarget resource = client.target(clientUri).path(clientService); List<Roster> rosterList = resource.request(javax.ws.rs.core.MediaType.APPLICATION_XML) .get(new GenericType<List<Roster>>() { })
- 18. RESTful Service @GET @Override @Produces({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON}) public List<Roster>findAll() { return super.findAll(); }
- 19. Communicate (Demo) • Basiccommunication to display database table data
- 20. Writing or Modifying Data •Utilize @PUT and @POST
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- 23. Writing or Modifying Data •Demo Utilizing JAX-RS forms and responses
- 24. Invoking Underlying Database Service •@NamedStoredProcedure
- 25. SecureYour Services! • Recommendusing OAUTH or LDAP authentication, generating token • Utilize JWT to secure endpoints • MicroProfile JWT
- 26. Dozens of Libraries •PrimeFaces • ButterFaces • MyFaces • OmniFaces (Utilities)
- 27. Summary • Utilize microserviceswith JPA and JAX-RS to build database communication • Create front-ends using JSF, CDI, JAX-RS • Utilize third party libraries for limitless options
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