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What's new and noteworthy in Java EE 8?
- 1. What's new andnoteworthy in Java EE 8? Expertenkreis Java, 05.12.2017, GEDOPLAN Dirk Weil, GEDOPLAN GmbH
- 2. Dirk Weil GEDOPLAN GmbH,Bielefeld GEDOPLAN IT Consulting Konzeption, Realisierung von IT-Lösungen GEDOPLAN IT Training Seminare in Berlin, Bielefeld, on-site Java EE seit 1998 Vorträge, Veröffentlichungen What's new and noteworthy in Java EE 8? 2gedoplan.de
- 3. New and noteworthyin CDI 2.0 Observer ordering What's new and noteworthy in Java EE 8? 3gedoplan.de @ApplicationScoped public class EventObserver { void a(@Observes @Priority(Interceptor.Priority.APPLICATION + 1) DemoEvent e) { … } void b(@Observes @Priority(Interceptor.Priority.APPLICATION + 2) DemoEvent e) { … } @ApplicationScoped public class EventProducer { @Inject Event<DemoEvent> eventSource; public void fireSyncEvent() { this.eventSource.fire(new DemoEvent());
- 4. New and noteworthyin CDI 2.0 Asynchronuous events What's new and noteworthy in Java EE 8? 4gedoplan.de @ApplicationScoped public class EventObserver { void x(@ObservesAsync DemoEvent e) { … } void y(@ObservesAsync DemoEvent e) { … } @ApplicationScoped public class EventProducer { @Inject Event<DemoEvent> eventSource; public void fireAsyncEvent() { CompletionStage<DemoEvent> completionStage = this.eventSource.fireAsync(new DemoEvent());
- 5. New and noteworthyin CDI 2.0 SE container What's new and noteworthy in Java EE 8? 5gedoplan.de SeContainerInitializer seContainerInitializer = SeContainerInitializer.newInstance(); try (SeContainer container = seContainerInitializer.initialize()) { HelloWorldService helloWorldService = container.select(HelloWorldService.class).get(); this.log.debug(helloWorldService.getHelloWorld()); } <dependency> <groupId>org.jboss.weld.se</groupId> <artifactId>weld-se-shaded</artifactId> <version>3.0.2.Final</version> </dependency> <dependency> <groupId>org.apache.openwebbeans</groupId> <artifactId>openwebbeans-se</artifactId> <version>2.0.2</version> </dependency>
- 6. New and noteworthyin CDI 2.0 Java 8 alignment Repeatable qualifier annotations Instance.stream() Various minor adjustments No context control in SE What's new and noteworthy in Java EE 8? 6gedoplan.de
- 7. New and noteworthyin Bean Validation 2.0 New constraints @Email, @NotEmpty, @NotBlank, @Positive, @PositiveOrZero, @Negative, @NegativeOrZero, @PastOrPresent, @FutureOrPresent Container element constraints Java 8 alignment Repeatable constraint annotations Support for Java 8 date and time types Support for Optional<T> What's new and noteworthy in Java EE 8? 7gedoplan.de List<@Positive @Max(6) Integer> marks; Optional<@Email String> getEmail() { … }
- 8. New and noteworthyin JPA 2.2 Java 8 alignment Repeatable annotations Support for LocalDate, LocalDateTime, LocalTime, OffsetDateTime, OffsetTime Query.getResultStream() Allow CDI injections into AttributeConverter What's new and noteworthy in Java EE 8? 8gedoplan.de public class Employee { @AttributeOverride(name = "street", column = @Column(name = "HOME_STREET")) @AttributeOverride(name = "zipCode", column = @Column(name = "HOME_ZIPCODE")) @AttributeOverride(name = "city", column = @Column(name = "HOME_CITY")) private Address homeAddress; public class DocumentRepository { public Stream<Document> findAllAsStream() { return entityManager .createQuery("select x from Document x", Document.class) .getResultStream();
- 9. New and noteworthyin JSF 2.3 Java Time Support in <f:convertDateTime> CDI integration Deprecate javax.faces.bean Allow injection of specific JSF artifacts (e.g. FacesContext) Support CDI injections into converters What's new and noteworthy in Java EE 8? 9gedoplan.de <h:outputText id="founded" value="#{countryPresenter.someCountry.founded}"> <f:convertDateTime type="localDate"/> </h:outputText> public class Country { private LocalDate founded; @FacesConverter(forClass = Country.class, managed = true) public class CountryConverter implements Converter<Country> { @Inject CountryRepository countryRepository;
- 10. New and noteworthyin JSF 2.3 Websocket integration What's new and noteworthy in Java EE 8? 10gedoplan.de <f:websocket channel="ticker" onmessage="function(message) { document.getElementById('coolNewFeature').value=message; }" /> <h:inputText id="coolNewFeature" value="" size="25" readonly="true" /> public class TickerEndpoint { @Inject @Push(channel = "ticker") private PushContext channel; public void tick() { String message = … this.channel.send(message);
- 11. New and noteworthyin JSF 2.3 Multi-field validation Use non-default bean validation group for one or more input fields Use <f:validateWholeBean> after input fields Enable feature in web.xml Works by validating a temporary copy Not working on GlassFish 5 Incredibly bloated What's new and noteworthy in Java EE 8? 11gedoplan.de <h:inputText value="#{questionnaire.email}"> <f:validateBean validationGroups="InitialInput" /> </h:inputText> <h:inputText value="#{questionnaire.comment}"> <f:validateBean validationGroups="InitialInput" /> </h:inputText> <f:validateWholeBean value="#{questionnaire}" validationGroups="InitialInput" />
- 12. New and noteworthy:JSON-B 1.0 Java – JSON binding Similar to JAXB Mapping annotations @JsonbVisibility @JsonbNillable @JsonbTransient @JsonbTypeAdapter @JsonbDateFormat @JsonbNumberFormat What's new and noteworthy in Java EE 8? 12gedoplan.de @JsonbNillable public class Country { private String id; private String name; @JsonbTypeAdapter(ContinentConverter.class) private Continent continent; @JsonbTransient private String dummy = "unused";
- 13. New and noteworthy:JSON-B 1.0 (De)serialization API: JsonbBuilder, Jsonb Configuration: Class level annotations (@JsonbNillable, …) JsonbConfig What's new and noteworthy in Java EE 8? 13gedoplan.de Country country = … try (Jsonb jsonb = JsonbBuilder.create()) { String json = jsonb.toJson(country); … } String json = … try (Jsonb jsonb = JsonbBuilder.create()) { Country country = jsonb.fromJson(json, Country.class); … } JsonbConfig jsonbConfig = new JsonbConfig().withFormatting(true); Jsonb jsonb = JsonbBuilder.create(jsonbConfig);
- 14. New and noteworthyin Servlet 4.0 HTTP/2 support Header compression Request multiplexing: Allow multiple parallel requests on same connection Server push: Send content probably needed in advance In general „behind the scenes“ What's new and noteworthy in Java EE 8? 14gedoplan.de protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { PushBuilder pushBuilder = req.newPushBuilder(); if (pushBuilder != null) { pushBuilder.path("/dummy.css").push(); } …
- 15. New and noteworthyin JAX-RS 2.1 Reactive client support What's new and noteworthy in Java EE 8? 15gedoplan.de Client client= ClientBuilder.newClient(); CompletionStage<String> planetearthCompletionStage = client .path("http://localhost:8080/whats-new-in-jee8/rest/planetearth") .request() .accept(MediaType.TEXT_PLAIN) .rx() .get(String.class) .exceptionally(e -> "the ultimate question of life, the universe, and everything");
- 16. New and noteworthyin JAX-RS 2.1 SSE support What's new and noteworthy in Java EE 8? 16gedoplan.de @Path("sse") public class SseResource { @Context Sse sse; SseBroadcaster sseBroadcaster; @PostConstruct void init() { this.sseBroadcaster = this.sse.newBroadcaster(); } @GET @Produces(MediaType.SERVER_SENT_EVENTS) public void register(@Context SseEventSink sseEventSink) { this.sseBroadcaster.register(sseEventSink); } public void tick() { this.sseBroadcaster.broadcast(this.sse.newEvent("Hello, it is " + new Date())); }
- 17. New and noteworthyin JAX-RS 2.1 SSE support What's new and noteworthy in Java EE 8? 17gedoplan.de try (SseEventSource sseEventSource = SseEventSource .target("http://localhost:8080/whats-new-in-jee8/rest/sse") .build()) { sseEventSource.register(e -> log.debug("Event received: " + e)); sseEventSource.open();
- 18. Odds and ends JSON-P JSON-Pointer JSON-Patch JSON-Big-Data JavaEE Security API Authentication Mechanism Identity Store Security Context What's new and noteworthy in Java EE 8? 18gedoplan.de
- 19. <TTFN> - = 3 years, 5 months Evolution or maintenance release? Implementations GlassFish 5.0 (big areas nonfunctional) Payara 5.0.0 (still alpha) Open Liberty (daily build) What's new and noteworthy in Java EE 8? 19gedoplan.de
- 20. The future … What'snew and noteworthy in Java EE 8? 20gedoplan.de
- 21. More gedoplan-it-consulting.de/expertenkreis-java Slides github.com/GEDOPLAN/whats-new-in-jee8 Demo project www.gedoplan-it-training.de Trainings inBerlin, Bielefeld, inhouse www.gedoplan-it-consulting.de Reviews, Coaching, … Blog [email protected] @dirkweil What's new and noteworthy in Java EE 8? 21gedoplan.de