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#1284 Use local variable inference

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This commit is contained in:
Pavel Manannikov 2020-11-23 19:42:50 +02:00
parent 2332520d67
commit 97e3a3debc
4 changed files with 15 additions and 15 deletions
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8
version-number/README.md
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@ -78,7 +78,7 @@ public class BookRepository {
throw new BookNotFoundException("Not found book with id: " + book.getId());
}
Book latestBook = collection.get(book.getId());
var latestBook = collection.get(book.getId());
if (book.getVersion() != latestBook.getVersion()) {
throw new VersionMismatchException(
"Tried to update stale version " + book.getVersion()
@ -107,10 +107,10 @@ public class BookRepository {
Here's the concurrency control in action:
```java
long bookId = 1;
var bookId = 1;
// Alice and Bob took the book concurrently
final Book aliceBook = bookRepository.get(bookId);
final Book bobBook = bookRepository.get(bookId);
final var aliceBook = bookRepository.get(bookId);
final var bobBook = bookRepository.get(bookId);
aliceBook.setTitle("Kama Sutra"); // Alice has updated book title
bookRepository.update(aliceBook); // and successfully saved book in database

10
version-number/src/main/java/com/iluwatar/versionnumber/App.java
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@ -53,17 +53,17 @@ public class App {
BookDuplicateException,
BookNotFoundException,
VersionMismatchException {
long bookId = 1;
var bookId = 1;
BookRepository bookRepository = new BookRepository();
Book book = new Book();
var bookRepository = new BookRepository();
var book = new Book();
book.setId(bookId);
bookRepository.add(book); // adding a book with empty title and author
LOGGER.info("An empty book with version {} was added to repository", book.getVersion());
// Alice and Bob took the book concurrently
final Book aliceBook = bookRepository.get(bookId);
final Book bobBook = bookRepository.get(bookId);
final var aliceBook = bookRepository.get(bookId);
final var bobBook = bookRepository.get(bookId);
aliceBook.setTitle("Kama Sutra"); // Alice has updated book title
bookRepository.update(aliceBook); // and successfully saved book in database

2
version-number/src/main/java/com/iluwatar/versionnumber/BookRepository.java
View File

@ -56,7 +56,7 @@ public class BookRepository {
throw new BookNotFoundException("Not found book with id: " + book.getId());
}
Book latestBook = collection.get(book.getId());
var latestBook = collection.get(book.getId());
if (book.getVersion() != latestBook.getVersion()) {
throw new VersionMismatchException(
"Tried to update stale version " + book.getVersion()

10
version-number/src/test/java/com/iluwatar/versionnumber/BookRepositoryTest.java
View File

@ -33,17 +33,17 @@ import static org.junit.jupiter.api.Assertions.*;
class BookRepositoryTest {
@Test
void testBookRepository() throws BookDuplicateException, BookNotFoundException, VersionMismatchException {
final long bookId = 1;
final var bookId = 1;
BookRepository bookRepository = new BookRepository();
Book book = new Book();
var bookRepository = new BookRepository();
var book = new Book();
book.setId(bookId);
bookRepository.add(book);
assertEquals(0, book.getVersion());
final Book aliceBook = bookRepository.get(bookId);
final Book bobBook = bookRepository.get(bookId);
final var aliceBook = bookRepository.get(bookId);
final var bobBook = bookRepository.get(bookId);
assertEquals(aliceBook.getTitle(), bobBook.getTitle());
assertEquals(aliceBook.getAuthor(), bobBook.getAuthor());