Código del capítulo de Quarkus donde hablo de servicios. Las notas del episodio están en https://www.makigas.es/series/acceso-a-datos-con-quarkus/modificar-y-borrar-registros y el vídeo se puede ver en https://www.youtube.com/watch?v=KLeavUAk_H0

Book.java

package es.danirod.quarkus.bookshelf;

import jakarta.persistence.Entity;
import io.quarkus.hibernate.orm.panache.PanacheEntity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.Id;

import java.time.LocalDate;
import java.util.Objects;

@Entity
public class Book {
    @Id
    @GeneratedValue
    private Long id;
    private String title;
    private String description;
    private int numPages;
    private LocalDate pubDate;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public int getNumPages() {
        return numPages;
    }

    public void setNumPages(int numPages) {
        this.numPages = numPages;
    }

    public LocalDate getPubDate() {
        return pubDate;
    }

    public void setPubDate(LocalDate pubDate) {
        this.pubDate = pubDate;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof Book book)) return false;
        return id == book.id && numPages == book.numPages && Objects.equals(title, book.title) && Objects.equals(description, book.description) && Objects.equals(pubDate, book.pubDate);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, title, description, numPages, pubDate);
    }

    @Override
    public String toString() {
        return "Book{" +
                "title='" + title + '\'' +
                ", description='" + description + '\'' +
                ", numPages=" + numPages +
                ", pubDate=" + pubDate +
                ", id=" + id +
                '}';
    }
}

BookRepository.java

package es.danirod.quarkus.bookshelf;

import io.quarkus.hibernate.orm.panache.PanacheRepository;
import jakarta.enterprise.context.ApplicationScoped;

@ApplicationScoped
public class BookRepository implements PanacheRepository<Book> {
}

BookResource.java

package es.danirod.quarkus.bookshelf;

import jakarta.inject.Inject;
import jakarta.transaction.Transactional;
import jakarta.ws.rs.*;
import jakarta.ws.rs.core.Response;

import java.util.List;
import java.util.NoSuchElementException;

@Path("/books")
public class BookResource {

    private BookRepository booksRepository;

    @Inject
    public BookResource(BookRepository booksRepository) {
        this.booksRepository = booksRepository;
    }

    @GET
    public List<Book> listBooks() {
        return booksRepository.listAll();
    }

    @POST
    @Transactional
    public Book insertBook(Book givenBook) {
        booksRepository.persist(givenBook);
        return givenBook;
    }

    @GET
    @Path("{id}")
    public Response retrieveBook(@PathParam("id") Long id) {
        Book book = booksRepository.findById(id);
        if (book != null) {
            return Response.ok(book).build();
        }
        return Response.status(404).entity("Not found").build();
    }

    @DELETE
    @Path("{id}")
    @Transactional
    public void deleteBook(@PathParam("id") Long id) {
        booksRepository.deleteById(id);
    }

    @PUT
    @Path("{id}")
    @Transactional
    public Book updateBook(@PathParam("id") Long id, Book bookData) {
        Book existingBook = booksRepository.findById(id);
        if (existingBook == null) {
            throw new NoSuchElementException("Este libro no existe");
        }
        existingBook.setTitle(bookData.getTitle());
        existingBook.setDescription(bookData.getDescription());
        existingBook.setPubDate(bookData.getPubDate());
        existingBook.setNumPages(bookData.getNumPages());

        // El libro que persistimos es el que nos entregó el ORM.
        booksRepository.persist(existingBook);
        return existingBook;
    }
}