前提介绍
如果已经使用了redis sdk雪球的SDK组件，已经集成实现了
实现原理
英文原声文档，简单易懂，而且这种metric模式，是趋势
代码实现
添加监控
注意
commandLatencyCollector方法
private void buildRedisClusterClient() {`` ``if (redisClusterClient == ``null``) {`` ``ClientResources res = DefaultClientResources.builder()`` ``.ioThreadPoolSize(LETTUCE_IO_THREAD_COUNT)`` ``.commandLatencyPublisherOptions(`` ``DefaultEventPublisherOptions.builder()`` ``.eventEmitInterval(Duration.ofSeconds(``5``))`` ``.build()`` ``)`` ``.commandLatencyCollector(``new LettuceCommandLatencyCollector(metrics))`` ``.build();`` ``redisClusterClient = RedisClusterClient.create(res, REDIS_CLUSTER_URI);`` ``int MAX_REDIRECTS = ``99``;`` ``redisClusterClient.setOptions(`` ``ClusterClientOptions.builder()`` ``.maxRedirects(MAX_REDIRECTS)`` ``.socketOptions(SocketOptions.builder().keepAlive(``true``).build())`` ``.topologyRefreshOptions(`` ``ClusterTopologyRefreshOptions.builder()`` ``.enableAllAdaptiveRefreshTriggers()`` ``.build())`` ``.build()); ``redisClusterClient.getResources()`` ``.eventBus()`` ``.get()`` ``.subscribe(``new LettuceMetricsSubscriber(buildEventVisitors(metrics)));`` ``}``} |
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实现监控接口，其中的
firstResponseLatency和completionLatency概念要清楚，不要混淆
LettuceCommandLatencyCollector
public class LettuceCommandLatencyCollector ``implements CommandLatencyCollector {`` ``private static final Logger log = LoggerFactory.getLogger(LettuceCommandLatencyCollector.``class``); ``private Metrics metrics; ``public LettuceCommandLatencyCollector(Metrics metrics) {`` ``this``.metrics = metrics;`` ``} ``@Override`` ``public void recordCommandLatency(SocketAddress local, SocketAddress remote, ProtocolKeyword commandType, ``long firstResponseLatency, ``long completionLatency) {`` ``metrics.timer(commandType.name() + ``".firstResponseLatency"``).update(firstResponseLatency, TimeUnit.NANOSECONDS);`` ``metrics.timer(commandType.name() + ``".completionLatency"``).update(completionLatency - firstResponseLatency, TimeUnit.NANOSECONDS);`` ``if (firstResponseLatency > ``10000000 || completionLatency > ``10000000``) {`` ``log.warn(``"REDIS4 slowlog | " + local.toString() + ``" -> " + remote.toString() + ``" | " + commandType.name() + ``" | firstResponseLatency:" + firstResponseLatency + ``" ns | completionLatency:" + completionLatency + ``" ns"``);`` ``}`` ``} ``@Override`` ``public void shutdown() {`` ``} ``@Override`` ``public Map<CommandLatencyId, CommandMetrics> retrieveMetrics() {`` ``return ImmutableMap.of();`` ``} ``@Override`` ``public boolean isEnabled() {`` ``return true``;`` ``}``} |
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