直接用 @Timed 注解很爽。 但是如果想要个性化配置呢,比如入参中的某个字段来分别统计分位数。还需要自己写一套吗?有最佳实践吗?如果 github 上有推荐的?
codex 写的关于分位数的那块代码如下: @Bean public MeterFilter supplierSearchDistributionFilter() { return new MeterFilter() { @Override public DistributionStatisticConfig configure(Meter.Id id, DistributionStatisticConfig config) { DistributionRule rule = DISTRIBUTION_RULES.get(id.getName()); if (rule == null) { return config; }
DistributionStatisticConfig custom = rule.toConfig();
//buildDistributionRules 默认值,application*.properties 的更优先
return config.merge(custom);
}
};
}
private static Map<String, DistributionRule> buildDistributionRules() {
Map<String, DistributionRule> rules = new HashMap<>();
DistributionRule defaultLatencyRule = new DistributionRule(
true,
new double[]{0.5, 0.9, 0.95, 0.99},
new double[]{
Duration.ofMillis(50).toNanos(),
Duration.ofMillis(100).toNanos(),
Duration.ofMillis(200).toNanos(),
Duration.ofMillis(300).toNanos(),
Duration.ofMillis(500).toNanos(),
Duration.ofSeconds(1).toNanos(),
Duration.ofSeconds(2).toNanos(),
Duration.ofSeconds(3).toNanos(),
Duration.ofSeconds(5).toNanos(),
Duration.ofSeconds(10).toNanos()
},
Duration.ofMillis(10).toNanos(),
Duration.ofSeconds(10).toNanos()
);
//rules.put(SUPPLIER_SEARCH_METRIC, defaultLatencyRule);
rules.put(XXX_METRIC, defaultLatencyRule);
return Collections.unmodifiableMap(rules);
}