Test

src/main/java/guru/springframework/spring5webapp/BootStrap/BootStrap.java

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+package guru.springframework.spring5webapp.BootStrap;
+
+import guru.springframework.spring5webapp.domain.Author;
+import guru.springframework.spring5webapp.domain.Book;
+import guru.springframework.spring5webapp.domain.Publisher;
+import guru.springframework.spring5webapp.repositories.AuthorRepository;
+import guru.springframework.spring5webapp.repositories.BookRepository;
+import guru.springframework.spring5webapp.repositories.PublisherRepository;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BootStrap implements CommandLineRunner {
+
+    private AuthorRepository authorRepository;
+    private BookRepository bookRepository;
+    private PublisherRepository publisherRepository;
+
+    public BootStrap (AuthorRepository authorRepository, BookRepository bookRepository, PublisherRepository publisherRepository) {
+        this.authorRepository = authorRepository;
+        this.bookRepository = bookRepository;
+        this.publisherRepository = publisherRepository;
+    }
+
+    @Override
+    public void run(String... args) throws Exception {
+        System.out.println("Starting in BootStrap");
+        Publisher publisher = new Publisher();
+        publisher.setName("SFG Publishing");
+        publisher.setCity("St Petersburg");
+        publisher.setState("FL");
+
+        publisherRepository.save(publisher);
+
+        System.out.println("Publisher Count: " + publisherRepository.count());
+
+        Author eric = new Author("Eric", "Evans");
+        Book ddd = new Book("Domain Driven Design", "123123",publisher);
+        eric.getBooks().add(ddd);
+        ddd.getAuthors().add(eric);
+
+        ddd.setPublisher(publisher);
+        eric.getBooks().add(ddd);
+        authorRepository.save(eric);
+        bookRepository.save(ddd);
+        publisherRepository.save(publisher);
+
+        Author rod = new Author("Rod", "Johnson");
+        Book noEJB = new Book("J2EE Development without EJB", "23444", publisher );
+        rod.getBooks().add(noEJB);
+        noEJB.getAuthors().add(rod);
+        noEJB.setPublisher(publisher);
+        rod.getBooks().add(noEJB);
+
+        authorRepository.save(rod);
+        bookRepository.save(noEJB);
+        publisherRepository.save(publisher);
+
+        System.out.println("Started in Bootstrap");
+        System.out.println("Number of Books: " + bookRepository.count());
+        System.out.println("Publisher's number of books = " + publisher.getBooks().stream().count());
+
+    }
+
+}

src/main/java/guru/springframework/spring5webapp/domain/Author.java

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+package guru.springframework.spring5webapp.domain;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Created by jt on 5/16/17.
+ */
+@Entity
+public class Author {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String firstName;
+    private String lastName;
+
+    @ManyToMany(mappedBy = "authors")
+    private Set<Book> books  = new HashSet<>();
+
+    public Author() {
+    }
+
+    public Author(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public Author(String firstName, String lastName, Set<Book> books) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.books = books;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public Set<Book> getBooks() {
+        return books;
+    }
+
+    public void setBooks(Set<Book> books) {
+        this.books = books;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Author author = (Author) o;
+
+        return id != null ? id.equals(author.id) : author.id == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
+
+    @Override
+    public String toString() {
+        return "Author{" +
+                "id=" + id +
+                ", firstName='" + firstName + '\'' +
+                ", lastName='" + lastName + '\'' +
+                ", books=" + books +
+                '}';
+    }
+}

src/main/java/guru/springframework/spring5webapp/domain/Book.java

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+package guru.springframework.spring5webapp.domain;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class Book {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String title;
+    private String isbn;
+
+    @ManyToOne
+    private Publisher publisher;
+
+    @ManyToMany
+    @JoinTable(name = "author_book", joinColumns = @JoinColumn(name = "book_id"),
+            inverseJoinColumns = @JoinColumn(name = "author_id"))
+    private Set<Author> authors = new HashSet<>();
+
+    public Book() {
+    }
+
+    public Book(String title, String isbn, Publisher publisher) {
+        this.title = title;
+        this.isbn = isbn;
+        this.publisher = publisher;
+    }
+
+    public Book(String title, String isbn, Publisher publisher, Set<Author> authors) {
+        this.title = title;
+        this.isbn = isbn;
+        this.publisher = publisher;
+        this.authors = authors;
+    }
+
+    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 getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public Publisher getPublisher() {
+        return publisher;
+    }
+
+    public void setPublisher(Publisher publisher) {
+        this.publisher = publisher;
+    }
+
+    public Set<Author> getAuthors() {
+        return authors;
+    }
+
+    public void setAuthors(Set<Author> authors) {
+        this.authors = authors;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Book book = (Book) o;
+
+        return id != null ? id.equals(book.id) : book.id == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" +
+                "id=" + id +
+                ", title='" + title + '\'' +
+                ", isbn='" + isbn + '\'' +
+                ", publisher='" + publisher + '\'' +
+                ", authors=" + authors +
+                '}';
+    }
+}

src/main/java/guru/springframework/spring5webapp/domain/Publisher.java

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+package guru.springframework.spring5webapp.domain;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+@Entity
+public class Publisher {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String name;
+    private String addressLine1;
+    private String city;
+    private String state;
+    private String zip;
+    @OneToMany
+    @JoinColumn(name = "publisher_id")
+    private Set<Book> books = new HashSet<>();
+
+    public Publisher() {
+    }
+
+    @Override
+    public String toString() {
+        return "Publisher{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", addressLine1='" + addressLine1 + '\'' +
+                ", city='" + city + '\'' +
+                ", state='" + state + '\'' +
+                ", zip='" + zip + '\'' +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Publisher publisher = (Publisher) o;
+        return Objects.equals(id, publisher.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddressLine1() {
+        return addressLine1;
+    }
+
+    public void setAddressLine1(String addressLine1) {
+        this.addressLine1 = addressLine1;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public String getState() {
+        return state;
+    }
+
+    public void setState(String state) {
+        this.state = state;
+    }
+
+    public String getZip() {
+        return zip;
+    }
+
+    public void setZip(String zip) {
+        this.zip = zip;
+    }
+
+    public Set<Book> getBooks() {
+        return books;
+    }
+
+    public void setBooks(Set<Book> books) {
+        this.books = books;
+    }
+}

src/main/java/guru/springframework/spring5webapp/repositories/AuthorRepository.java

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+package guru.springframework.spring5webapp.repositories;
+
+import guru.springframework.spring5webapp.domain.Author;
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * Created by jt on 5/16/17.
+ */
+public interface AuthorRepository extends CrudRepository<Author, Long> {
+}

src/main/java/guru/springframework/spring5webapp/repositories/BookRepository.java

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+package guru.springframework.spring5webapp.repositories;
+
+import guru.springframework.spring5webapp.domain.Book;
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * Created by jt on 5/16/17.
+ */
+public interface BookRepository extends CrudRepository<Book, Long> {
+}