Fetch association in batches

Author: AnghelLeonard

HibernateSpringBootLoadBatchAssociation/src/main/java/com/bookstore/MainApplication.java

@@ -20,8 +20,8 @@ public static void main(String[] args) {
     @Bean
     public ApplicationRunner init() {
         return args -> {
-          //  System.out.println("\n\nLoad authors with books:");
-          //  bookstoreService.displayAuthorsAndBooks();
+            System.out.println("\n\nLoad authors with books:");
+            bookstoreService.displayAuthorsAndBooks();
 
             System.out.println("\n\nLoad books with authors:");
             bookstoreService.displayBooksAndAuthors();

HibernateSpringBootLoadBatchAssociation/src/main/java/com/bookstore/entity/Author.java

@@ -28,7 +28,7 @@ public class Author implements Serializable {
 
     @OneToMany(cascade = CascadeType.ALL,
             mappedBy = "author", orphanRemoval = true)
-    //@BatchSize(size = 3)
+    @BatchSize(size = 3)
     private List<Book> books = new ArrayList<>();
 
     public void addBook(Book book) {

HibernateSpringBootLoadBatchAssociation/src/main/java/com/bookstore/entity/Book.java

@@ -59,15 +59,15 @@ public void setAuthor(Author author) {
 
     @Override
     public boolean equals(Object obj) {
-        
+
         if (this == obj) {
             return true;
         }
-        
+
         if (getClass() != obj.getClass()) {
             return false;
         }
-        
+
         return id != null && id.equals(((Book) obj).id);
     }
 
@@ -80,5 +80,5 @@ public int hashCode() {
     public String toString() {
         return "Book{" + "id=" + id + ", title=" + title + ", isbn=" + isbn + '}';
     }
-    
+
 }