example.caching.SimpleBookRepository.java Source code

Introduction

Here is the source code for example.caching.SimpleBookRepository.java

Source

/*
 * Copyright 2014-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package example.caching;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import lombok.extern.slf4j.Slf4j;

import org.springframework.util.Assert;

/**
 * @author Stephane Nicoll
 * @author Oliver Gierke
 */
@Slf4j
class SimpleBookRepository implements BookRepository {

    private final ConcurrentHashMap<Long, Book> content;

    public SimpleBookRepository(Map<Long, Book> content) {

        Assert.notNull(content, "Source map must not be null!");
        this.content = new ConcurrentHashMap<Long, Book>(content);
    }

    /*
     * (non-Javadoc)
     * @see example.caching.BookRepository#findBook(java.lang.Long)
     */
    @Override
    public Book findBook(Long id) {

        log.debug("looking up book with id {}", id);
        return content.get(id);
    }

    /*
     * (non-Javadoc)
     * @see example.caching.BookRepository#findBook(java.lang.Long, java.lang.String)
     */
    @Override
    public Book findBook(Long id, String storeName) {

        log.debug("looking up book with id {} and cache it in {}", id, storeName);
        return content.get(id);
    }

    /*
     * (non-Javadoc)
     * @see example.caching.BookRepository#updateBook(java.lang.Long, example.caching.Book)
     */
    @Override
    public Book updateBook(Long id, Book book) {

        log.debug("Updating book with id {} to {}", id, book);
        content.put(id, book);

        return book; // no transformation
    }

    /*
     * (non-Javadoc)
     * @see example.caching.BookRepository#removeBook(java.lang.Long)
     */
    @Override
    public boolean removeBook(Long id) {

        log.debug("Removing book with id {}", id);
        return content.remove(id) != null;
    }

    /*
     * (non-Javadoc)
     * @see example.caching.BookRepository#removeAll()
     */
    @Override
    public void removeAll() {

        log.debug("Removing all books");
        content.clear();
    }
}