我正在尝试将时间指标添加到我的 spring-boot web 应用程序中。目前,该应用程序使用 micrometer、prometheus 和 spring-boot-actuator。
我可以通过 http://localhost:8080/actuator/prometheus 连接到我的应用程序并查看默认指标列表,例如:
# HELP jvm_gc_memory_allocated_bytes_total Incremented for an increase in the size of the young generation memory pool after one GC to before the next
# TYPE jvm_gc_memory_allocated_bytes_total counter
jvm_gc_memory_allocated_bytes_total{application="my app",} 0.0
# HELP jvm_classes_loaded_classes The number of classes that are currently loaded in the Java virtual machine
# TYPE jvm_classes_loaded_classes gauge
jvm_classes_loaded_classes{application="my app",} 7581.0
...
太棒了!
但现在我想将计时指标附加到我的一个 Controller 的方法中。我希望这就像在类中添加一个 @Timed
注释一样简单:
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import io.micrometer.core.annotation.Timed;
@RestController
@Timed
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
@GetMapping("/greeting")
public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
doWork();
return buildResponse(name);
}
private void doWork() {
try {
Thread.sleep((long) (1000 * Math.random()));
} catch (InterruptedException e) {
}
}
private Greeting buildResponse(String name) {
return new Greeting(counter.incrementAndGet(), String.format(template, name));
}
}
但是,这似乎没有向 http://localhost:8080/actuator/prometheus 端点添加任何指标。
我需要采取哪些步骤才能让端点报告 GreetingController
类的计时指标,尤其是 doWork
和 buildResponse
方法?
-- 更新--
我已经设法获得了我想要的结果,但比我预期的要多做一些工作,我希望有更简单的方法。我明确地将 Timer
对象添加到我想要测量的每个方法中,如下所示:
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
@RestController
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
@Autowired
MeterRegistry meterRegistry;
@GetMapping("/greeting")
public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
doWork();
return buildResponse(name);
}
private void doWork() {
Timer timer = meterRegistry.timer(this.getClass().getSimpleName() + ".doWork");
timer.record(() -> {
try {
Thread.sleep((long) (1000 * Math.random()));
} catch (InterruptedException e) {
}
});
}
private Greeting buildResponse(String name) {
AtomicReference<Greeting> response = new AtomicReference<>();
Timer timer = meterRegistry.timer(this.getClass().getSimpleName() + ".buildResponse");
timer.record(() -> {
response.set(new Greeting(counter.incrementAndGet(), String.format(template, name)));
});
return response.get();
}
}
但至少这让我得到了我想要的结果:
# HELP GreetingController_buildResponse_seconds
# TYPE GreetingController_buildResponse_seconds summary
GreetingController_buildResponse_seconds_count{application="my app",} 10.0
GreetingController_buildResponse_seconds_sum{application="my app",} 0.001531409
# HELP GreetingController_buildResponse_seconds_max
# TYPE GreetingController_buildResponse_seconds_max gauge
GreetingController_buildResponse_seconds_max{application="my app",} 2.52253E-4
# HELP GreetingController_doWork_seconds_max
# TYPE GreetingController_doWork_seconds_max gauge
GreetingController_doWork_seconds_max{application="my app",} 0.941169892
# HELP GreetingController_doWork_seconds
# TYPE GreetingController_doWork_seconds summary
GreetingController_doWork_seconds_count{application="my app",} 10.0
GreetingController_doWork_seconds_sum{application="my app",} 4.767700907
有没有更简洁的方法?
最佳答案
注册TimedAspect作为配置类中的 bean:
@Bean
public TimedAspect timedAspect(MeterRegistry meterRegistry) {
return new TimedAspect(meterRegistry);
}
关于prometheus - 在普罗米修斯中显示任意@Timed指标,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64613043/