add update to rest api (#1401)

* upgrade to spring boot 1.5.2

* add full update to REST API

spring-cloud/spring-cloud-bootstrap/svc-book/src/main/java/com/baeldung/spring/cloud/bootstrap/svcbook/book/BookController.java

@@ -1,11 +1,19 @@
 package com.baeldung.spring.cloud.bootstrap.svcbook.book;
 
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.*;
-
 import java.util.List;
 import java.util.Map;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PatchMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
 @RestController
 @RequestMapping("/books")
 public class BookController {
@@ -13,7 +21,7 @@ public class BookController {
     @Autowired
     private BookService bookService;
 
-    @GetMapping("")
+    @GetMapping
     public List<Book> findAllBooks() {
         return bookService.findAllBooks();
     }
@@ -23,7 +31,7 @@ public class BookController {
         return bookService.findBookById(bookId);
     }
 
-    @PostMapping("")
+    @PostMapping
     public Book createBook(@RequestBody Book book) {
         return bookService.createBook(book);
     }
@@ -33,7 +41,12 @@ public class BookController {
         bookService.deleteBook(bookId);
     }
 
-    @PatchMapping("/{bookId")
+    @PutMapping("/{bookId}")
+    public Book updateBook(@RequestBody Book book, @PathVariable Long bookId) {
+        return bookService.updateBook(book, bookId);
+    }
+
+    @PatchMapping("/{bookId}")
     public Book updateBook(@RequestBody Map<String, String> updates, @PathVariable Long bookId) {
         return bookService.updateBook(updates, bookId);
     }

spring-cloud/spring-cloud-bootstrap/svc-book/src/main/java/com/baeldung/spring/cloud/bootstrap/svcbook/book/BookService.java

@@ -1,13 +1,15 @@
 package com.baeldung.spring.cloud.bootstrap.svcbook.book;
 
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
+import com.google.common.base.Preconditions;
 
 @Service
 @Transactional(readOnly = true)
@@ -27,7 +29,7 @@ public class BookService {
 
     @Transactional(propagation = Propagation.REQUIRED)
     public Book createBook(Book book) {
-        Book newBook = new Book();
+        final Book newBook = new Book();
         newBook.setTitle(book.getTitle());
         newBook.setAuthor(book.getAuthor());
         return bookRepository.save(newBook);
@@ -40,16 +42,25 @@ public class BookService {
 
     @Transactional(propagation = Propagation.REQUIRED)
     public Book updateBook(Map<String, String> updates, Long bookId) {
-        Book book = findBookById(bookId);
-        updates.keySet().forEach(key -> {
-            switch (key) {
-            case "author":
-                book.setAuthor(updates.get(key));
-                break;
-            case "title":
-                book.setTitle(updates.get(key));
-            }
-        });
+        final Book book = findBookById(bookId);
+        updates.keySet()
+            .forEach(key -> {
+                switch (key) {
+                case "author":
+                    book.setAuthor(updates.get(key));
+                    break;
+                case "title":
+                    book.setTitle(updates.get(key));
+                }
+            });
+        return bookRepository.save(book);
+    }
+
+    @Transactional(propagation = Propagation.REQUIRED)
+    public Book updateBook(Book book, Long bookId) {
+        Preconditions.checkNotNull(book);
+        Preconditions.checkState(book.getId() == bookId);
+        Preconditions.checkNotNull(bookRepository.findOne(bookId));
         return bookRepository.save(book);
     }
 }