[JavaEE] Implement a REST Endpoint

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1. Create a rest folder with JAXRSConfiguration.java:

package com.pluralsight.bookstore.rest;        import javax.ws.rs.ApplicationPath;        import javax.ws.rs.core.Application;@ApplicationPath("api")public class JAXRSConfiguration extends Application {}

 

2. Create Endpoint file: BookEndpoint.java:

@Path("/books")public class BookEndpoint {    @Inject    private BookRepository bookRepository;}

 

package com.pluralsight.bookstore.rest;import com.pluralsight.bookstore.model.Book;import com.pluralsight.bookstore.repository.BookRepository;import javax.inject.Inject;import javax.validation.constraints.Min;import javax.ws.rs.*;import javax.ws.rs.core.Context;import javax.ws.rs.core.Response;import javax.ws.rs.core.UriInfo;import java.net.URI;import java.util.List;import static javax.ws.rs.core.MediaType.APPLICATION_JSON;//api/books@Path("/books")public class BookEndpoint {    @Inject    private BookRepository bookRepository;    @POST    @Consumes(APPLICATION_JSON)    public Response createBook(Book book, @Context UriInfo uriInfo) {        book =  bookRepository.create(book);        URI createedURI = uriInfo.getBaseUriBuilder().path(book.getId().toString()).build();        return Response.created(createedURI).build();    }    @GET    @Produces(APPLICATION_JSON)    public Response getBooks() {        List<Book> books = bookRepository.findAll();        if(books.size() == 0) {            return Response.noContent().build();        }        return Response.ok(books).build();    }    @GET    @Path("/{id: \\d+}")    @Produces(APPLICATION_JSON)    public Response getBook(@PathParam("id") @Min(1) Long id) {        Book book = bookRepository.find(id);        if(book == null) {            return Response.status(Response.Status.NOT_FOUND).build();        }        return Response.ok(book).build();    }    // api/books/count    @GET    @Path("/count")    public Response countBooks() {        Long nbOfBooks =  bookRepository.countAll();        if(nbOfBooks == 0) {            return Response.noContent().build();        }        return Response.ok(nbOfBooks).build();    }    @DELETE    @Path("/{id : \\d+}")    public Response deleteBook(Long id) {        bookRepository.delete(id);        return Response.noContent().build();    }}

 

[JavaEE] Implement a REST Endpoint