传递到 Dropwizard 的控制台报告器

DeepSeek V3 中英对照 Passing through to Dropwizard’s console reporter Passing through to Dropwizard’s Console Reporter

本指南展示了如何接入较少使用的 Dropwizard Reporter 实现 —— 在本例中为 ConsoleReporter。

@Bean
	public MetricRegistry dropwizardRegistry() {
		return new MetricRegistry();
	}

	@Bean
	public ConsoleReporter consoleReporter(MetricRegistry dropwizardRegistry) {
		ConsoleReporter reporter = ConsoleReporter.forRegistry(dropwizardRegistry)
				.convertRatesTo(TimeUnit.SECONDS)
				.convertDurationsTo(TimeUnit.MILLISECONDS)
				.build();
		reporter.start(1, TimeUnit.SECONDS);
		return reporter;
	}

	@Bean
	public MeterRegistry consoleLoggingRegistry(MetricRegistry dropwizardRegistry) {
		DropwizardConfig consoleConfig = new DropwizardConfig() {

			@Override
			public String prefix() {
				return "console";
			}

			@Override
			public String get(String key) {
				return null;
			}

		};

		return new DropwizardMeterRegistry(consoleConfig, dropwizardRegistry, HierarchicalNameMapper.DEFAULT, Clock.SYSTEM) {
			@Override
			protected Double nullGaugeValue() {
				return null;
			}
		};
	}

java

请注意，在 Spring 环境中，此注册表会与其他实现一起添加到组合中，并用于所有指标，包括自定义和自动配置的指标。

class MyComponent {
    private final MeterRegistry registry;

    public MyComponent(MeterRegistry registry) {
        this.registry = registry;
    }

    public void doSomeWork(String lowCardinalityInput) {
        registry.timer("my.latency", "input", lowCardinalityInput).record(() -> {
            // do work
        });
    }
}

java

下面的列表展示了这个自定义计时器的典型输出：

3/2/18 10:14:27 AM =============================================================

-- Timers ----------------------------------------------------------------------
myLatency.lowCardinalityInput.INPUT
             count = 1
         mean rate = 1.02 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 100.00 milliseconds
               max = 100.00 milliseconds
              mean = 100.00 milliseconds
            stddev = 0.00 milliseconds
            median = 100.00 milliseconds
              75% <= 100.00 milliseconds
              95% <= 100.00 milliseconds
              98% <= 100.00 milliseconds
              99% <= 100.00 milliseconds
            99.9% <= 100.00 milliseconds

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