@Api(tags = "监控-Caffeine")
@RestController
@RequestMapping("monitor/caffeine")
public class MonitorCaffeineController {

    @Resource
    private CacheManager caffeine;


    @GetMapping("cacheNames")
    @ApiOperation("所有缓存name")
    public Collection`<String>` cacheNames() {

        return caffeine.getCacheNames();
    }

    @GetMapping("stats")
    @ApiOperation("根据缓存name查询缓存监控信息")
    public Map`<String, Object>` stats(@RequestParam String cacheName) {
        CaffeineCache caffeineCache = (CaffeineCache) caffeine.getCache(cacheName);
        CacheStats stats = CacheStats.empty();
        if (caffeineCache != null) {
            stats = caffeineCache.getNativeCache().stats();
        }

        Map`<String, Object>` map = new HashMap<>(16);
        map.put("请求次数", stats.requestCount());
        map.put("命中次数", stats.hitCount());
        map.put("未命中次数", stats.missCount());
        map.put("加载成功次数", stats.loadSuccessCount());
        map.put("加载失败次数", stats.loadFailureCount());
        map.put("加载失败占比", stats.loadFailureRate());
        map.put("加载总耗时", stats.totalLoadTime());
        map.put("回收总次数", stats.evictionCount());
        map.put("回收总权重", stats.evictionWeight());

        return map;
    }

}

@Service("noteService")
public class NoteServiceImpl implements NoteService {

    @Resource
    private SearchService searchService;


    @Transactional(rollbackFor = Throwable.class)
    @Override
    public CommonResponse`<NoteEntity>` save(NoteEntity note) {
        // 一系列 DB 操作

        try {
            searchService.sync(note);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return CommonResponse.success(entity);
    }

}