Eclipse微概要文件指标@Timed确实会测量时间,始终为0

时间:2018-07-17 14:18:13

标签: eclipse java-ee metrics timed microprofile

我们对日食微轮廓指标@Timed注释有疑问。 它似乎无法衡量时间(仅计算通话次数)。

Payara 5已安装完毕。

通过MDN web docs的典型输出:

    # TYPE application:total_coffees_retrieved counter
application:total_coffees_retrieved 4
# TYPE application:total_coffees_consumed counter
application:total_coffees_consumed 4
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_rate_per_second gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_rate_per_second 1.4044150172871745
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_one_min_rate_per_second gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_one_min_rate_per_second 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_five_min_rate_per_second gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_five_min_rate_per_second 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_fifteen_min_rate_per_second gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_fifteen_min_rate_per_second 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_mean_seconds gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_mean_seconds 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_max_seconds gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_max_seconds 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_min_seconds gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_min_seconds 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_stddev_seconds gauge
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_stddev_seconds 0.0
# TYPE application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds summary
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds_count 4
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.5"} 0.0
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.75"} 0.0
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.95"} 0.0
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.98"} 0.0
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.99"} 0.0
application:com_sebastian_daschner_hello_prometheus_coffees_retrieve_coffee_seconds{quantile="0.999"} 0.0

平均,最大,分位数均为“ 0.0”,而计数效果很好(= 4)。

我们尝试了Payara / JEE / Microprofile版本的多种组合,每种组合都具有相同的结果。

以下是一些代码段(碱基来自http://localhost:8080/metrics/application,仅添加了@Timed)

咖啡豆:

@ApplicationScoped
public class Coffees {


    @Counted(name = "total_coffees_retrieved", absolute = true, monotonic = true)
    @Timed   
    public String retrieveCoffee() {
        try {
            Thread.sleep((int) (1000 * Math.random()));
        } catch (InterruptedException ex) {
            Logger.getLogger(Coffees.class.getName()).log(Level.SEVERE, null, ex);
        }

        return "Coffee!";
    }

}

JAX-RS REST资源:

import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.Path;

@Path("coffee")
public class CoffeesResource {

    @Inject
    Coffees coffees;

    @GET
    public String getCoffee() {
        return coffees.retrieveCoffee();
    }

}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.sebastian-daschner</groupId>
    <artifactId>hello-prometheus</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.eclipse.microprofile.metrics</groupId>
            <artifactId>microprofile-metrics-api</artifactId>
            <version>1.1.1</version> <!-- also tried 1.0 and 1.1 -->
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>hello-prometheus</finalName>
    </build>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>

任何想法如何解决这个问题?

编辑:使用application / json请求指标时不会发生

curl -H "Accept: application/json" http://localhost:8080/metrics/application

问题已在下一个payara版本中解决: https://github.com/sdaschner/hello-prometheus/tree/microprofile

1 个答案:

答案 0 :(得分:0)

如果要查看0以外的值,则需要一种方法,该方法需要更多时间才能执行!只需增加一个计数器并返回一个类似的字符串,几乎不需要花费任何时间,绝对不会超过0.1秒,因此您将永远不会在指标中看到任何值。

尝试在方法中添加Thread.sleep(1500),以查看计时器是否记录1.5秒。

由于@Timed为您提供了大量统计信息,因此您也可以尝试Thread.sleep(Math.random() * 1000)使您执行的时间有所不同,并提供更多有趣的指标进行检查。

编辑:如下面的评论所述,Payara Micro 5.182中似乎存在一个错误,导致计时器无法正常工作。