69 lines
2.5 KiB
Java
69 lines
2.5 KiB
Java
package com.guwan.backend.xxljob.job;
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import com.github.benmanes.caffeine.cache.Cache;
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import com.github.benmanes.caffeine.cache.stats.CacheStats;
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import com.guwan.backend.common.BusinessException;
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import com.guwan.backend.constant.CacheConstants;
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import com.xxl.job.core.handler.annotation.XxlJob;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.cache.CacheManager;
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import org.springframework.cache.caffeine.CaffeineCacheManager;
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import org.springframework.stereotype.Component;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Map;
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@Slf4j
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@Component
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@RequiredArgsConstructor
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public class SimpleXxlJob {
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private final CacheManager cacheManager;
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@XxlJob("demoGuwanJobHandler")
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public void demoGuwanJobHandler() {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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System.out.println("执行定时任务,执行时间:"+sdf.format(new Date()));
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for (String cache : CacheConstants.CACHE_LIST) {
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Map<String, Object> stats = getStats(cache);
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for (Map.Entry<String, Object> entry : stats.entrySet()) {
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System.out.println("Key: " + entry.getKey() + ", Value: " + entry.getValue());
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}
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log.info("缓存使用情况{}",stats);
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}
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}
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public Map<String, Object> getStats(String cacheName) {
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CaffeineCacheManager caffeineCacheManager = (CaffeineCacheManager) cacheManager;
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Cache<Object, Object> nativeCache = null;
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try {
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nativeCache = (Cache<Object, Object>)
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caffeineCacheManager.getCache(cacheName).getNativeCache();
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} catch (Exception e) {
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// throw new RuntimeException(e);
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throw new BusinessException("没有此本地缓存");
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}
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CacheStats stats = nativeCache.stats();
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Map<String, Object> result = new HashMap<>();
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result.put("hitCount 命中次数(成功从缓存中获取数据的次数)", stats.hitCount());
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result.put("missCount 未命中次数(缓存中没有找到数据的次数)", stats.missCount());
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result.put("loadCount 加载次数(需要从数据源重新加载数据的次数)", stats.loadCount());
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result.put("evictionCount 驱逐次数(由于空间限制而被清除的缓存项数量)", stats.evictionCount());
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result.put("hitRate 命中率", String.format("%.2f%%", stats.hitRate() * 100));
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return result;
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}
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} |