删除向导指标注释@Timed不起作用

我刚刚尝试了一下，效果很好。这是我的整个设置：

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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany.app</groupId>
    <artifactId>my-app</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>my-app</name>
    <url>http://maven.apache.org</url>


    <dependencies>

        <dependency>
            <groupId>io.astefanutti.metrics.aspectj</groupId>
            <artifactId>metrics-aspectj</artifactId>
            <version>1.2.0</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <configuration>
                    <aspectLibraries>
                        <aspectLibrary>
                            <groupId>io.astefanutti.metrics.aspectj</groupId>
                            <artifactId>metrics-aspectj</artifactId>
                        </aspectLibrary>
                    </aspectLibraries>
                    <complianceLevel>1.8</complianceLevel>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4.1</version>
                <configuration>
                    <!-- get all project dependencies -->
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <!-- MainClass in mainfest make a executable jar -->
                    <archive>
                        <manifest>
                            <mainClass>com.mkyong.core.utils.App</mainClass>
                        </manifest>
                    </archive>

                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <!-- bind to the packaging phase -->
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

请注意，我需要添加 .我还添加了一个插件供以后测试。这并不是真的必要，我只是不想去寻找本地盒子上的依赖关系。aspectj-maven-pluginassembly

我的定时班：

package com.mycompany.app;

import java.util.concurrent.ThreadLocalRandom;

import com.codahale.metrics.annotation.Timed;

import io.astefanutti.metrics.aspectj.Metrics;
@Metrics(registry = "someMetrics")
public class TimedClass {

    @Timed(name = "test")
    public void doSomething() {
        try {
            Thread.sleep(200L);
        } catch (InterruptedException e) {
        }
        System.out.println("Done");
    }

    @Timed(name = "test-random")
    public void doSomething2() {
        try {
            Thread.sleep(ThreadLocalRandom.current().nextLong(100L));
        } catch (InterruptedException e) {
        }
        System.out.println("Done");
    }
}

和应用程序：

package com.mycompany.app;

import java.util.concurrent.TimeUnit;

import com.codahale.metrics.ConsoleReporter;
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.SharedMetricRegistries;
public class App {

    public static void main(String[] args) throws InterruptedException {
        MetricRegistry metrics =
                SharedMetricRegistries.getOrCreate("someMetrics");

        ConsoleReporter.forRegistry(metrics)
        .convertRatesTo(TimeUnit.SECONDS)
        .convertDurationsTo(TimeUnit.MILLISECONDS)
        .build()
        .start(1, TimeUnit.SECONDS);

        TimedClass c = new TimedClass();
        for(int i = 0; i < 10; i++) {
            c.doSomething();
            c.doSomething2();
        }
        c.doSomething();
        Thread.sleep(1010L);
    }
}

这里发生的事情是，在编译方面maven插件时，将找到您使用的注释并应用方面。

在你的情况下（和我的情况），例如来自指标方面的源代码：

final aspect TimedAspect {

    pointcut timed(Profiled object) : execution(@Timed !static * (@Metrics Profiled+).*(..)) && this(object);

    Object around(Profiled object) : timed(object) {
        String methodSignature = ((MethodSignature) thisJoinPointStaticPart.getSignature()).getMethod().toString();
        Timer timer = object.timers.get(methodSignature).getMetric();
        Timer.Context context = timer.time();
        try {
            return proceed(object);
        } finally {
            context.stop();
        }
    }
}

以上所做的就是说：

任何非静态且具有批注的方法都应在“around”方法中执行。@Timed

现在，您可以通过执行以下操作来编译和打包它：

mvn clean install package

这将为未应用的方面打印一堆警告，但这完全没问题（我们实际上并没有使用它们）。

此外，您现在有一个包含您的应用程序的胖罐，您可以执行它以查看我们所做的工作是否有效：

java -cp target/my-app-1.0-SNAPSHOT-jar-with-dependencies.jar com.mycompany.app.App

这将打印：

artur@pdb-ct ~/dev/repo/my-app $ java -cp target/my-app-1.0-SNAPSHOT-jar-with-dependencies.jar com.mycompany.app.App
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Done
Done
Done
Done
Done
Done
Done
Done
04/01/18 15:10:42 ==============================================================

-- Timers ----------------------------------------------------------------------
com.mycompany.app.TimedClass.test
             count = 4
         mean rate = 4.11 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 200.21 milliseconds
               max = 200.37 milliseconds
              mean = 200.29 milliseconds
            stddev = 0.06 milliseconds
            median = 200.25 milliseconds
              75% <= 200.32 milliseconds
              95% <= 200.37 milliseconds
              98% <= 200.37 milliseconds
              99% <= 200.37 milliseconds
            99.9% <= 200.37 milliseconds
com.mycompany.app.TimedClass.test-random
             count = 4
         mean rate = 4.10 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 20.41 milliseconds
               max = 32.28 milliseconds
              mean = 26.07 milliseconds
            stddev = 4.56 milliseconds
            median = 28.26 milliseconds
              75% <= 32.28 milliseconds
              95% <= 32.28 milliseconds
              98% <= 32.28 milliseconds
              99% <= 32.28 milliseconds
            99.9% <= 32.28 milliseconds


Done
Done
Done
Done
Done
Done
Done
04/01/18 15:10:43 ==============================================================

-- Timers ----------------------------------------------------------------------
com.mycompany.app.TimedClass.test
             count = 8
         mean rate = 4.06 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 200.16 milliseconds
               max = 200.37 milliseconds
              mean = 200.25 milliseconds
            stddev = 0.06 milliseconds
            median = 200.25 milliseconds
              75% <= 200.26 milliseconds
              95% <= 200.37 milliseconds
              98% <= 200.37 milliseconds
              99% <= 200.37 milliseconds
            99.9% <= 200.37 milliseconds
com.mycompany.app.TimedClass.test-random
             count = 7
         mean rate = 3.55 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 20.41 milliseconds
               max = 97.20 milliseconds
              mean = 43.68 milliseconds
            stddev = 28.17 milliseconds
            median = 28.26 milliseconds
              75% <= 76.30 milliseconds
              95% <= 97.20 milliseconds
              98% <= 97.20 milliseconds
              99% <= 97.20 milliseconds
            99.9% <= 97.20 milliseconds


Done
Done
Done
Done
Done
Done
04/01/18 15:10:44 ==============================================================

-- Timers ----------------------------------------------------------------------
com.mycompany.app.TimedClass.test
             count = 11
         mean rate = 3.70 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 200.13 milliseconds
               max = 200.37 milliseconds
              mean = 200.23 milliseconds
            stddev = 0.07 milliseconds
            median = 200.21 milliseconds
              75% <= 200.26 milliseconds
              95% <= 200.37 milliseconds
              98% <= 200.37 milliseconds
              99% <= 200.37 milliseconds
            99.9% <= 200.37 milliseconds
com.mycompany.app.TimedClass.test-random
             count = 10
         mean rate = 3.37 calls/second
     1-minute rate = 0.00 calls/second
     5-minute rate = 0.00 calls/second
    15-minute rate = 0.00 calls/second
               min = 15.19 milliseconds
               max = 97.20 milliseconds
              mean = 48.90 milliseconds
            stddev = 30.99 milliseconds
            median = 32.28 milliseconds
              75% <= 76.30 milliseconds
              95% <= 97.20 milliseconds
              98% <= 97.20 milliseconds
              99% <= 97.20 milliseconds
            99.9% <= 97.20 milliseconds

几点：

这在 Eclipse 中不起作用。您将必须安装一个扩展才能使其正常工作（我还没有尝试过），请参阅此处：

https://github.com/astefanutti/metrics-aspectj/blob/master/README.md

有关如何使用 AJDT 的说明：

https://www.ibm.com/developerworks/library/j-ajdt/

原因是（模糊，因为我没有花太多时间在这个问题上），这些方面是在编译时应用的，而不是在运行时。Eclipse 在 IDE 中运行时使用自己的编译器，因此它只执行您的代码。但是，pom文件中的maven插件是在编译代码时应用这些方面的插件。

我希望这有帮助，

P.S. 原谅我的命名/打包 - 我使用了默认的 maven 生成器

-- 阿图尔

跟进：

要添加直接向导指标，如果您想使用上述解决方案，只需将其添加到共享指标即可。例如：

        MetricRegistry myCustomRegistry = new MetricRegistry();
        SharedMetricRegistries.add("my-metric-registry", myCustomRegistry);

在你的情况下，这将来自或类似。environment().metrics()

您面临的问题是，AspectJ 建议使用的实例与您用于手动计量测试和 .MetricRegistryConsoleReporter

由于您的问题没有指定 -ed 实例的来源，因此我只能推测它与 您与 使用 的同一实例，但这很可能是与 AspectJ 建议使用的“默认”注册表不同的实例。AspectJ建议使用的那个是通过@InjectMetricRegistryConsoleReporter

SharedMetricRegistries.getOrCreate("default");

为了解决您的问题，您应该：

• 确保 -ed 实例和 返回的实例与 相同，方法是使用首选的依赖关系注入框架使用工厂方法的方式（对于 Spring，对于 CDI）。@InjectMetricRegistryenvironment.metrics()SharedMetricRegistries.getOrCreate("default")@Bean@Produces

• 在类注释的值中使用 EL 表达式，如下所示：Foo@Metricsregistry

  @Metrics(registry = "${this.metricRegistry}")
  

  为上面引用的属性提供一个 getter：metricRegistry

  public MetricRegistry getMetricRegistry() {
      return this.metricRegistry;
  }
  

  并确保您的项目中有所需的 EL 库：

  <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.el</artifactId>
      <version>3.0.1-b09</version>
  </dependency>