我开发了一个很好的Spring Aspect，我可以使用它来监控我的服务运营性能。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会控制我的所有方法调用，以便对它们进行分析。这在调试时有点不舒服（它甚至误导了Eclipse本身），所以我希望只有在我的应用程序处于生产阶段时才执行Pointcut。我可以根据环境变量，Java属性或类似物来配置切入点有条件地执行吗？
Documentation仅指方法变量条件......提前致谢！
修改
从@ DavidL的建议开始，我将切入点改为：
@Pointcut("execution(* com.tadic.module.TadicModuleGeneric+.*(..)) && if()")
public static boolean pointCut() {
return true;
}
这就是Eclipse没有警告任何事情的方式。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$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
所以看起来织布工没有正确地做到这一点。有什么建议吗？
编辑2 当我通过基于Spring AOP代理的方面使用AspectJ时会发生此问题。我正在使用Maven构建项目和Eclipse AspectJ插件以将其集成到我的工作区中。 AspectJ版本是1.8.2，Spring-AOP版本是3.2.8.RELEASE，我用Java 7.0.75 JDK构建它。
这是使用POM的一个示例：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tesicnor.test</groupId>
<artifactId>aspect-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>aspect-test</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<aspectj.version>1.8.2</aspectj.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.7</version>
<configuration>
<complianceLevel>1.7</complianceLevel>
<source>1.7</source>
<target>1.7</target>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
</dependencies>
</project>
这个POM是我创建的功能测试用例的POM。我目前的项目很庞大，似乎还有其他依赖导致了麻烦。
答案 0 :(得分：1)
您可以获得表示当前阶段的属性（可能以静态方式）的引用。根据它的值，您可以绕过profileServiceMethods方法中的代码（提前返回）。
以不太美观的方式，你可以为了同样的目的在你的方面声明一个布尔变量：
if(!logActivated)
return null;
else
<your code here>
编辑：
看看文档吧。也许你可以这样做：
@Pointcut("execution(* com.company.MyService+.*(..)) && args(i) && if()")
public static boolean pointCut(int i) {
return i == State.PRODUCTION_STAGE ;
}
答案 1 :(得分：0)
最后，我得到了它的工作。似乎Eclipse在我的类路径中做了一些混乱，导致上面的问题。我删除了aspectjweaver，我可以根据@ DavidL的答案开始工作以下代码：
@Aspect
public class PerformanceMonitorAspect {
/**
* Decide whether the Pointcut to be executed or not
*/
private static boolean enabled;
@Pointcut("execution(* com.company.MyService+.*(..)) && if()")
public static boolean pointCut() {
return enabled;
}
private Logger logger = LoggerFactory.getLogger("performance");
@Around("pointCut()")
public Object profileServiceMethods(ProceedingJoinPoint thisJoinPoint) throws Throwable {
MethodSignature ms = (MethodSignature) thisJoinPoint.getSignature();
Method m = ms.getMethod();
long t1 = System.nanoTime();
Object result = thisJoinPoint.proceed();
long t2 = System.nanoTime();
long millis = TimeUnit.NANOSECONDS.toMillis(t2 - t1);
if (millis < 1000) {
logger.trace("Execution time for {}: {} ms", m.getName(), millis);
} else {
logger.warn("Substantial execution time for {}: {} ms", m.getName(),
millis);
}
return result;
}
//The value is retrieved by Spring having read a config file written by Maven, depending on the profile
@Value("${enable.performance.monitor}")
public void setEnabled(boolean value) {
enabled = value;
}
}
然后，让Spring管理方面：
<bean class="com.tadic.aspects.PerformanceMonitorAspect" factory-method="aspectOf" />