com.xyxy.platform.examples.showcase.demos.cache.guava.GuavaCacheDemo.java Source code

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Here is the source code for com.xyxy.platform.examples.showcase.demos.cache.guava.GuavaCacheDemo.java

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/*******************************************************************************
 * Copyright (c) 2005, 2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/
package com.xyxy.platform.examples.showcase.demos.cache.guava;

import static org.assertj.core.api.Assertions.*;

import java.util.concurrent.TimeUnit;

import com.xyxy.platform.examples.showcase.entity.User;
import com.xyxy.platform.examples.showcase.service.AccountService;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import com.xyxy.platform.modules.core.test.data.DataFixtures;
import com.xyxy.platform.modules.core.test.log.LogbackListAppender;
import com.xyxy.platform.modules.core.test.spring.SpringTransactionalTestCase;
import com.xyxy.platform.modules.core.utils.Threads;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;

/**
 * GuavaCache.
 * 
 *
 */
@ContextConfiguration(locations = { "/applicationContext.xml" })
public class GuavaCacheDemo extends SpringTransactionalTestCase {

    @Autowired
    private AccountService accountService;

    @Test
    public void demo() throws Exception {
        // 1005
        LoadingCache<Long, User> cache = CacheBuilder.newBuilder().maximumSize(100)
                .expireAfterAccess(5, TimeUnit.SECONDS).build(new CacheLoader<Long, User>() {
                    @Override
                    public User load(Long key) throws Exception {
                        logger.info("fetch from database");
                        return accountService.getUser(key);
                    }

                });

        // ??
        DataFixtures.executeScript(dataSource, "classpath:data/h2/cleanup-data.sql",
                "classpath:data/h2/import-data.sql");

        // ?appenderassert
        LogbackListAppender appender = new LogbackListAppender();
        appender.addToLogger(GuavaCacheDemo.class);

        // ?
        User user = cache.get(1L);
        assertThat(user.getLoginName()).isEqualTo("admin");
        assertThat(appender.isEmpty()).isFalse();
        appender.clearLogs();

        // ?
        User user2 = cache.get(1L);
        assertThat(user2.getLoginName()).isEqualTo("admin");
        assertThat(appender.isEmpty()).isTrue();

        // ??
        Threads.sleep(10, TimeUnit.SECONDS);
        User user3 = cache.get(1L);
        assertThat(user3.getLoginName()).isEqualTo("admin");
        assertThat(appender.isEmpty()).isFalse();
    }
}