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FacesServlet

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- Vorteil: Nutzung der HTTP Semantik (z.B. Verben) möglich - Implementierungen müssen Adapter für JSP und JSF bereitstellen − −

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plugins { id 'java' id 'war' } repositories { jcenter() mavenCentral() } dependencies { //… implementation 'javax.mvc:javax.mvc-api:1.0.0‘ implementation 'org.eclipse.krazo:krazo-resteasy:1.0.0‘ // implementation 'org.eclipse.krazo.ext:krazo-thymeleaf:1.0.0' providedCompile 'jakarta.platform:jakarta.jakartaee-web-api:8.0.0' //… }

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import javax.ws.rs.ApplicationPath; import javax.ws.rs.core.Application; @ApplicationPath("/mvc") public class App extends Application { }

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Hello World

Hello World!

import javax.mvc.Controller; import javax.ws.rs.GET; import javax.ws.rs.Path; @Path("hello") @Controller public class HelloWorldController { @GET public String sayHello() { return "hello.jsp"; } }

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@Path("/bookings") @Controller public class BookingController { // ... @Inject private Models models; @GET public String index() { final var bookings = bookingService.getAllBookings(); models.put("bookings", bookings); return "index.jsp"; } // ...

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@Path("/bookings") @Controller public class BookingController { // ... @Inject private Models models; @GET public String showIndex() { // ... models.put("bookings", bookings); return "index.jsp"; } // ... } ${booking.bookingNumber} ${booking.name} …

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@Path("/bookings") @Controller public class BookingController { // ... @Inject private Models models; @GET public String showIndex() { final var bookings = bookingService.getAllBookings(); models.put("bookings", bookings); return "index.jsp"; } // ... }

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@Inject private Models models; ${booking.bookingNumber} ${booking.name} … @Path("/bookings") @Controller public class BookingController { // ... @Inject private Models models; @GET public String showIndex() { // ... return "index.jsp"; } // ... }

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@Path("/bookings") @Controller public class BookingController { // ... @GET @Path("/{bookingNumber}") public Response showDetailsOfBooking(@PathParam("bookingNumber") final UUID bookingNumber) { final var booking = bookingService.findBookingForBookingNumber(bookingNumber); if (booking.isPresent()) { models.put("booking", booking.get()); return Response.ok("details.jsp").build(); } else { models.put("bookingNumber", bookingNumber); return Response.status(Response.Status.NOT_FOUND).entity("404.jsp").build(); } } // ...

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@GET @Path("/{bookingNumber}") public Response showDetailsOfBooking( @PathParam("bookingNumber") final UUID bookingNumber) { // ... if (booking.isPresent()) { models.put("booking", booking.get()); return Response.ok("details.jsp").build(); } else { // ... } }

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@GET @Path("/{bookingNumber}") public Response showDetailsOfBooking( @PathParam("bookingNumber") final UUID bookingNumber) { // ... if (booking.isPresent()) { // ... } else { models.put("bookingNumber", bookingNumber); return Response .status(Response.Status.NOT_FOUND) .entity("404.jsp") .build(); } }

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Details

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Details

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Details

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Details

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Details @Path("/bookings") @Controller public class BookingController { // ... @GET @Path("/{bookingNumber}") public String showDetailsOfBooking(@PathParam("bookingNumber") final UUID bookingNumber) { // ... } // ...

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→ Details

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Details @Path("/bookings") @Controller public class BookingController { // ... @GET @Path("/{bookingNumber}") @UriRef("showBookingDetails") public String showDetailsOfBooking(@PathParam("bookingNumber") final UUID bookingNumber) { // ... } // ...

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→ Details

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@Path("/bookings") @Controller public class BookingController { // ... @GET @Path("/new") public String showNewBookingForm() { return "form.jsp"; } // ... }

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Name

Save

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// ... @Inject private BindingResult bindingResult; @POST public String createNewBooking(@MvcBinding @FormParam("name") @NotBlank @Size(min = 5, max = 255) final String name) { if (bindingResult.isFailed()) { models.put("errors", new ArrayList<>(bindingResult.getAllErrors())); return "form.jsp"; } final var booking = bookingService.createNewBooking(name); return "redirect:/bookings/" + booking.getBookingNumber(); } // ...

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${msg.get("form.label.name")}

${error.getParamName()}: ${error.getMessage()}

${msg.get("form.btn.save")}

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• •

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Name

Save

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Name

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@POST @CsrfProtected public String createNewBooking(@MvcBinding @FormParam("name") @NotBlank @Size(min = 5, max = 255) final String name) { // ... }

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// ... @DELETE @Path("/{bookingNumber}") public String cancelBooking(@PathParam("bookingNumber") final UUID bookingNumber) { final var isCancelled = bookingService.cancelBooking(bookingNumber); return isCancelled ? "redirect:/bookings" : "404.jsp"; } // ...

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Cancel

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/** *

Locale resolvers are used to determine the locale of the current request and are * discovered using CDI. *

* * … */ public interface LocaleResolver { /** *

Resolve the locale of the current request given a {@linkLocaleResolverContext}.

* * … * * @param context the context needed for processing. * @return The resolved locale or null. */ Locale resolveLocale(LocaleResolverContext context); }

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/** *

Locale resolvers are used to determine the locale of the current request and are * discovered using CDI. *

* * … */ public interface LocaleResolver { /** *

Resolve the locale of the current request given a {@linkLocaleResolverContext}.

* * … * * @param context the context needed for processing. * @return The resolved locale or null. */ Locale resolveLocale(LocaleResolverContext context); } org.eclipse.krazo.locale.LocaleResolverChain MvcContext

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messages //messages.properties … #Index Page page.title=My awesome application #Hello World hello.world=Hello World! //messages_fr.properties #Hello World hello.world=Bonjour le monde! //messages_de.properties #Hello World hello.world=Hallo Welt!

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@RequestScoped @Named("msg") public class Messages { @Inject private MvcContext mvcContext; public final String get(final String key) { LOGGER.info(String.format("Getting message '%s' for locale '%s'", key, mvcContext.getLocale())); final var bundle = ResourceBundle.getBundle("messages", mvcContext.getLocale()); return bundle.containsKey(key) ? bundle.getString(key) : formatUnknownKey(key); } private static String formatUnknownKey(final String key) { return String.format("???%s???", key); } }

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<%@ page contentType="text/html;charset=UTF-8" language="java" %> ${msg.get("page.title")}

${msg.get("hello.world")}

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//messages.properties My awesome application

Hello World!

//messages_fr.properties My awesome application

Bonjour le monde!

//messages_de.properties My awesome application

Hallo Welt!

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