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@Service public class GcMonitorService {
@Autowired private GcMonitorDataMapper gcMonitorDataMapper; @Autowired private RedisTemplate<String, Object> redisTemplate; @Autowired private AlertService alertService;
@Scheduled(fixedRate = 10000) public void collectGcData() { try { List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans(); for (GarbageCollectorMXBean gcBean : gcBeans) { collectGcBeanData(gcBean); } analyzeGcPerformance(); } catch (Exception e) { log.error("采集GC数据失败: {}", e.getMessage(), e); } }
private void collectGcBeanData(GarbageCollectorMXBean gcBean) { try { GcMonitorData gcData = new GcMonitorData(); gcData.setHostname(getHostname()); gcData.setGcName(gcBean.getName()); gcData.setCollectionCount(gcBean.getCollectionCount()); gcData.setCollectionTime(gcBean.getCollectionTime()); gcData.setMemoryPoolNames(String.join(",", gcBean.getMemoryPoolNames())); gcData.setCollectTime(new Date()); gcMonitorDataMapper.insert(gcData); updateGcCache(gcData); checkGcAlert(gcData); log.debug("采集GC数据: gcName={}, count={}, time={}ms", gcData.getGcName(), gcData.getCollectionCount(), gcData.getCollectionTime()); } catch (Exception e) { log.error("采集GC数据失败: gcName={}, error={}", gcBean.getName(), e.getMessage(), e); } }
private void updateGcCache(GcMonitorData gcData) { try { String cacheKey = "gc:realtime:" + gcData.getHostname() + ":" + gcData.getGcName(); redisTemplate.opsForValue().set(cacheKey, gcData, Duration.ofMinutes(5)); } catch (Exception e) { log.warn("更新GC缓存失败: {}", e.getMessage()); } }
private void checkGcAlert(GcMonitorData gcData) { try { if (gcData.getCollectionTime() > 1000) { sendGcAlert(gcData, "GC_SLOW", "WARNING", String.format("GC执行时间过长: %dms", gcData.getCollectionTime())); } String frequencyKey = "gc:frequency:" + gcData.getHostname() + ":" + gcData.getGcName(); Long frequency = redisTemplate.opsForValue().increment(frequencyKey); redisTemplate.expire(frequencyKey, Duration.ofMinutes(1)); if (frequency > 10) { sendGcAlert(gcData, "GC_FREQUENT", "WARNING", String.format("GC频率过高: %d次/分钟", frequency)); } } catch (Exception e) { log.error("检查GC告警失败: {}", e.getMessage(), e); } }
private void sendGcAlert(GcMonitorData gcData, String alertType, String alertLevel, String alertMessage) { try { String alertKey = "gc:alert:" + gcData.getHostname() + ":" + alertType; Boolean hasAlert = redisTemplate.hasKey(alertKey); if (hasAlert == null || !hasAlert) { GcAlertRecord alertRecord = new GcAlertRecord(); alertRecord.setHostname(gcData.getHostname()); alertRecord.setGcName(gcData.getGcName()); alertRecord.setAlertType(alertType); alertRecord.setAlertLevel(alertLevel); alertRecord.setAlertMessage(alertMessage); alertRecord.setAlertStatus("ACTIVE"); alertRecord.setAlertTime(new Date()); alertService.sendGcAlert(alertRecord); redisTemplate.opsForValue().set(alertKey, "1", Duration.ofMinutes(5)); log.warn("发送GC告警: hostname={}, gcName={}, type={}", gcData.getHostname(), gcData.getGcName(), alertType); } } catch (Exception e) { log.error("发送GC告警失败: {}", e.getMessage(), e); } }
private void analyzeGcPerformance() { try { List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans(); long totalGcTime = 0; long totalGcCount = 0; for (GarbageCollectorMXBean gcBean : gcBeans) { totalGcTime += gcBean.getCollectionTime(); totalGcCount += gcBean.getCollectionCount(); } double avgGcTime = totalGcCount > 0 ? (double) totalGcTime / totalGcCount : 0; double gcFrequency = totalGcCount / 60.0; updateGcPerformanceStats(avgGcTime, gcFrequency); log.debug("GC性能分析: avgTime={}ms, frequency={}次/分钟", avgGcTime, gcFrequency); } catch (Exception e) { log.error("分析GC性能失败: {}", e.getMessage(), e); } }
private void updateGcPerformanceStats(double avgGcTime, double gcFrequency) { try { String statsKey = "gc:performance:" + getHostname(); Map<String, Object> stats = new HashMap<>(); stats.put("avgGcTime", avgGcTime); stats.put("gcFrequency", gcFrequency); stats.put("lastUpdateTime", System.currentTimeMillis()); redisTemplate.opsForValue().set(statsKey, stats, Duration.ofMinutes(10)); } catch (Exception e) { log.warn("更新GC性能统计失败: {}", e.getMessage()); } }
public Map<String, Object> getGcPerformanceStats(String hostname) { String statsKey = "gc:performance:" + hostname; return (Map<String, Object>) redisTemplate.opsForValue().get(statsKey); }
private String getHostname() { try { return InetAddress.getLocalHost().getHostName(); } catch (UnknownHostException e) { return "unknown"; } } }
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