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java - 根据环境变量或属性执行切入点

转载 作者:太空宇宙 更新时间:2023-11-04 06:08:26 24 4
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我开发了一个很好的 Spring Aspect,我可以用它来监视我的服务操作性能。如果某些操作需要很长时间才能执行,则会记录它们。

@Aspect
public class PerformanceMonitorAspect {

private Logger logger = LoggerFactory.getLogger("performance");

@Pointcut("execution(* com.company.MyService+.*(..))")
public void pointCut(){

}

@Around("pointCut()")
public Object profileServiceMethods(ProceedingJoinPoint thisJoinPoint) throws Throwable {
MethodSignature ms = (MethodSignature) thisJoinPoint.getSignature();
Method m = ms.getMethod();
long t1 = System.nanoTime();
Object result = thisJoinPoint.proceed();
long t2 = System.nanoTime();
long millis = TimeUnit.NANOSECONDS.toMillis(t2 - t1);
if (millis < 1000) {
logger.trace("Execution time for {}: {} ms", m.getName(), millis);
} else {
logger.warn("Substantial execution time for {}: {} ms", m.getName(),
millis);
}
return result;
}

}

但是,由于它是一个 @Around 建议,Spring 控制了我的所有方法调用,以便对它们进行分析。这在调试时有点不舒服(它甚至会误导 Eclipse 本身),因此我希望仅当我的应用程序处于生产阶段时才执行切入点。我可以将切入点配置为根据环境变量、Java 属性或类似属性有条件地执行吗?

Documentation仅指方法变量条件...提前致谢!

编辑

根据@DavidL的建议,我将切入点更改为:

@Pointcut("execution(* com.tadic.module.TadicModuleGeneric+.*(..)) && if()")
public static boolean pointCut() {
return true;
}

这就是 Eclipse 不会发出任何警告的方式。但是,我在运行时得到了这个:

GRAVE: Critical error during deployment: 
java.lang.VerifyError: Expecting a stackmap frame at branch target 7
Exception Details:
Location:
com/mycompany/aspects/AuditAspect.<clinit>()V @1: invokestatic
Reason:
Expected stackmap frame at this location.
Bytecode:
0000000: 00b8 0134 a700 084b 2ab3 012f b1
Exception Handler Table:
bci [1, 7] => handler: 7

at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2615)
at java.lang.Class.getDeclaredMethods(Class.java:1860)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:474)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:458)
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:518)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:639)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:575)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1350)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:355)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:326)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:434)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:624)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

看来编织者做得不对。有什么建议吗?

编辑2当我通过 Spring AOP 基于代理的方面使用 AspectJ 时,会发生此问题。我使用 Maven 来构建项目,并使用 Eclipse AspectJ 插件将其集成到我的工作区中。 AspectJ 版本是 1.8.2,Spring-AOP 版本是 3.2.8.RELEASE,我使用 Java 7.0.75 JDK 构建它。

这是正在使用的 POM 示例:

<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.tesicnor.test</groupId>
<artifactId>aspect-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>aspect-test</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<aspectj.version>1.8.2</aspectj.version>
</properties>

<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.7</version>
<configuration>
<complianceLevel>1.7</complianceLevel>
<source>1.7</source>
<target>1.7</target>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
</dependencies>


</project>

这个 POM 是我创建的功能测试用例的 POM。我当前的项目很大,似乎还有其他依赖项造成了麻烦。

最佳答案

您可以获得对代表当前阶段的属性的引用(可能以静态方式)。根据它的值,您可以绕过 profileServiceMethods 方法内的代码(提前返回)。

以一种不太美观的方式,您可以在方面声明一个 boolean 变量以达到相同的目的:

if(!logActivated)
return null;
else
<your code here>

编辑:

看看文档即可。也许你可以这样做:

@Pointcut("execution(* com.company.MyService+.*(..)) && args(i) && if()")
public static boolean pointCut(int i) {
return i == State.PRODUCTION_STAGE ;
}

关于java - 根据环境变量或属性执行切入点,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29033690/

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