不工作的AspectJ示例的实现

Question

我尝试从AspectJ实现一个简单的https://www.baeldung.com/aspectj注释示例。不同之处在于，我想在JUnit TestClass上使用注释。我搜索了一段时间寻找解决方案，但没有找到正确的提示。

我的pom.xml的一部分

<dependencies>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.7</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.9.7</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>aspectj-maven-plugin</artifactId>
        <version>1.14.0</version>
    </dependency>
</dependencies>

<plugins>
    <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>aspectj-maven-plugin</artifactId>
        <version>1.14.0</version>
        <configuration>
            <complianceLevel>1.8</complianceLevel>
            <!--<source>1.8</source>
            <target>1.8</target>-->
            <showWeaveInfo>true</showWeaveInfo>
            <verbose>true</verbose>
            <Xlint>ignore</Xlint>
            <!--<encoding>UTF-8 </encoding>-->
        </configuration>
        <executions>
            <execution>
                <phase>process-sources</phase>
                <goals>
                    <!-- use this goal to weave all your main classes -->
                    <goal>compile</goal>
                    <!-- use this goal to weave all your test classes -->
                    <goal>test-compile</goal>
                </goals>
            </execution>
        </executions>
    </plugin>       
</plugins>

我的注解：

package com.mb.mtpp.main.extension.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE, ElementType.FIELD})
public @interface Secured {
public boolean isLocked() default false;
}

我的方面：

package com.mb.mtpp.main.extension.aspectj;

import com.mb.mtpp.main.extension.annotations.Secured;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public final class SecuredMethodAspect {

@Pointcut("@annotation(secured)")
    public void callAt(Secured secured) {
}

@Before("callAt(secured)")
public void around(JoinPoint pjp, Secured secured) throws Throwable {
    System.out.println("++++++++test++++++++");
    //return secured.isLocked() ? null : pjp.proceed();
}
}

@Secured(isLocked = true)
public class DummyClassTest {

@Test
@Secured(isLocked = true)
public void dummyTest4(){
    log.info("Test 4");
}
}

这个建议提到了类注释，我在日志中看到了它：

CLASSPATH component C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.3.2\plugins\maven\lib\maven3\boot\plexus-classworlds.license: java.util.zip.ZipException: error in opening zip file
[INFO] Join point 'staticinitialization(void com.mb.mtpp.main.dummy.DummyClassTest.<clinit>())' in Type 'com.mb.mtpp.main.dummy.DummyClassTest' (DummyClassTest.java:23) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-execution(void com.mb.mtpp.main.dummy.DummyClassTest.dummyTest3())' in Type 'com.mb.mtpp.main.dummy.DummyClassTest' (DummyClassTest.java:64) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-execution(void com.mb.mtpp.main.dummy.DummyClassTest.dummyTest4())' in Type 'com.mb.mtpp.main.dummy.DummyClassTest' (DummyClassTest.java:71) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-call(void com.mb.mtpp.main.extension.DummyClass.function1())' in Type 'com.mb.mtpp.main.dummy.DummyClassTest' (DummyClassTest.java:79) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-call(void com.mb.mtpp.main.extension.DummyClass.function2())' in Type 'com.mb.mtpp.main.dummy.DummyClassTest' (DummyClassTest.java:80) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-execution(void com.mb.mtpp.main.extension.DummyClass.function1())' in Type 'com.mb.mtpp.main.extension.DummyClass' (DummyClass.java:8) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)
[INFO] Join point 'method-execution(void com.mb.mtpp.main.extension.DummyClass.function2())' in Type 'com.mb.mtpp.main.extension.DummyClass' (DummyClass.java:13) advised by before advice from 'com.mb.mtpp.main.extension.aspectj.SecuredMethodAspect' (SecuredMethodAspect.java:62)

但是控制台中没有显示日志"++++++++test++++++++“。它在通知不存在的情况下执行。我对类、testcase和一个方法进行了注释，如示例中所示。我尝试了不同的设置我的切入点，但显示是最好的。然后这个班也会被建议。我不知道怎么回事。

Answer 1

抱歉，我很忙。假设您的目录布局如下所示：

​

​

一些示例类可能如下所示：

package com.mb.mtpp.main.extension.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD, ElementType.TYPE, ElementType.FIELD })
public @interface Secured {
  boolean isLocked() default false;
}

package com.mb.mtpp.main.extension;

import com.mb.mtpp.main.extension.annotations.Secured;

public class MyClass {
  @Secured
  public void doSomething() {}
}

package com.mb.mtpp.main.extension.aspectj;

import com.mb.mtpp.main.extension.annotations.Secured;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public final class SecuredMethodAspect {
  @Pointcut("@annotation(secured) && execution(* *(..))")
  public void securedMethods(Secured secured) {}

  @Before("securedMethods(secured)")
  public void interceptSecuredMethods(JoinPoint joinPoint, Secured secured) {
    System.out.println(joinPoint);
  }
}

package com.mb.mtpp.main.extension;

import com.mb.mtpp.main.extension.annotations.Secured;
import org.junit.jupiter.api.Test;

@Secured(isLocked = true)
public class MyTest {
  @Test
  @Secured(isLocked = true)
  public void dummyTest4(){
    System.out.println("Test 4");
  }

  @Test
  @Secured(isLocked = true)
  public void dummyTest5(){
    System.out.println("Test 5");
    new MyClass().doSomething();
  }
}

你的POM是：

<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>org.example</groupId>
  <artifactId>SO_AJ_AspectNotTriggered_72344739</artifactId>
  <version>1.0-SNAPSHOT</version>

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

  <dependencies>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.9.7</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>5.8.2</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>3.0.0-M6</version>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>aspectj-maven-plugin</artifactId>
        <version>1.14.0</version>
        <configuration>
          <complianceLevel>1.8</complianceLevel>
          <showWeaveInfo>true</showWeaveInfo>
          <verbose>true</verbose>
          <Xlint>ignore</Xlint>
          <encoding>UTF-8</encoding>
        </configuration>
        <executions>
          <execution>
            <goals>
              <!--<goal>compile</goal>-->
              <goal>test-compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

</project>

然后，如果您运行mvn clean test或简单地将项目导入IntelliJ IDEA，则日志输出将是：

execution(void com.mb.mtpp.main.extension.MyTest.dummyTest4())
Test 4
execution(void com.mb.mtpp.main.extension.MyTest.dummyTest5())
Test 5

现在，如果出于任何原因，您也希望将方面应用于带注释的应用程序类，只需

and

• uncomment <goal>compile</goal>.

• 将方面从src/test/java移到src/main/java，
• 将<scope>test</scope>从aspectjrt
• 移除

那么控制台日志将是：

execution(void com.mb.mtpp.main.extension.MyTest.dummyTest4())
Test 4
execution(void com.mb.mtpp.main.extension.MyTest.dummyTest5())
Test 5
execution(void com.mb.mtpp.main.extension.MyClass.doSomething())

看见?在这种情况下，应用程序类MyClass也会被截获。

更新:关于为什么它不能在您自己的示例中工作的，这是因为您的POM的配置方式使得Maven Compiler插件重新编译了这些方面之后的AspectJ Maven插件。结果是，由于覆盖类文件，方面信息丢失了。