package org.oxerr.spring.cache.redis.scored.example.spring.data.redis.cache;
   
   import java.util.HashMap;
   import java.util.Map;
   
   import org.springframework.cache.annotation.CacheEvict;
   import org.springframework.cache.annotation.Cacheable;
   import org.springframework.stereotype.Component;
   
  @Component
  public class SimpleBookRepository implements BookRepository {
  
  	private final Map<String, Book> books = new HashMap<>();
  
  	@Override
  	@Cacheable("books")
  	public Book getByIsbn(String isbn) {
  		Book book = this.books.get(isbn);
  
  		simulateSlowService();
  
  		return book;
  	}
  
  	@Override
  	@CacheEvict("books")
  	public Book saveBook(Book book) {
  		this.books.put(book.getIsbn(), book);
  		return book;
  	}
  
  	// Don't do this at home
  	private void simulateSlowService() {
  		try {
  			long time = 3000L;
  			Thread.sleep(time);
  		} catch (InterruptedException e) {
  			Thread.currentThread().interrupt();
  			throw new IllegalStateException(e);
  		}
  	}
  
  }