建议 AspectJ 从不同的 Maven 项目调用一个方法

Question

我正在尝试创建从另一个项目 (testMaven) 调用的项目 (test5) 方法的建议。我已经将项目 test5 作为依赖项包含在 testMaven 的 pom.xml 中，并在 testMaven 的 class 中设置了一个建议，但它仍然没有被执行。方法 (dfg) 的调用工作正常。

这是它的代码：

MainApp.java (testMaven)

package testMaven;

import test5.yxc;

public class MainApp {

    public static void main(String[] args) {
        yxc b = new yxc();
        b.dfg(2);
    }
}

yxc.java (测试5)

package test5;

public class yxc {

    public void dfg(int a){
        System.out.println(a);

    }
}

testAspect.java (testMaven)

package testMaven;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.annotation.Before;
import test5.yxc;

@Aspect
public class testAspect {

    @Before("execution(* test5.yxc.dfg(..))")
    public void testBefore(){
        System.out.println("yooi");
    }
}

pom.xml(testMaven)

<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>testingMaven</groupId>
    <artifactId>testMaven</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <spring.version>4.2.5.RELEASE</spring.version>
        <java.version>1.8</java.version>
        <!-- Maven Plugin Versions -->
        <maven.compiler.plugin.version>3.2</maven.compiler.plugin.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.9</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.9</version>
        </dependency>
        <dependency>
            <groupId>test5</groupId>
            <artifactId>test5</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

    </dependencies>

    <build>

        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <version>1.8</version>
                <dependencies>
                    <dependency>
                        <groupId>org.aspectj</groupId>
                        <artifactId>aspectjtools</artifactId>
                        <version>${aspectj.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${maven.compiler.plugin.version}</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>

        </plugins>
    </build>
</project>

你能帮我看看这是怎么回事吗？谢谢

Answer 1

检查了您在 testMaven 中的代码并检查了代码并更改了 POM，如下所示：

<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>testMaven</groupId>
<artifactId>testMaven</artifactId>
<version>0.0.1-SNAPSHOT</version>

<properties>

    <java.version>1.8</java.version>
    <aspectj.version>1.8.9</aspectj.version>
    <!-- Maven Plugin Versions -->
    <maven.compiler.plugin.version>3.2</maven.compiler.plugin.version>

</properties>

<dependencies>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>${aspectj.version}</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjtools</artifactId>
        <version>${aspectj.version}</version>
    </dependency>
</dependencies>

<build>

    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>${java.version}</source>
                <target>${java.version}</target>
            </configuration>
        </plugin>

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>aspectj-maven-plugin</artifactId>
            <version>1.8</version>
            <configuration>
                <complianceLevel>${java.version}</complianceLevel>
                <source>${java.version}</source>
                <target>${java.version}</target>
                <showWeaveInfo>true</showWeaveInfo>
            </configuration>
            <executions>
                <execution>
                    <id>AspectJ-Classes</id>
                    <phase>process-classes</phase>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                </execution>
                <execution>
                    <id>AspectJ-Test-Classes</id>
                    <phase>process-test-classes</phase>
                    <goals>
                        <goal>test-compile</goal>
                    </goals>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>org.aspectj</groupId>
                    <artifactId>aspectjrt</artifactId>
                    <version>${aspectj.version}</version>
                </dependency>
                <dependency>
                    <groupId>org.aspectj</groupId>
                    <artifactId>aspectjtools</artifactId>
                    <version>${aspectj.version}</version>
                </dependency>
            </dependencies>
        </plugin>

        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

    </plugins>

</build>

注意： 添加了程序集插件以使 testing/verifying 对我自己更容易。

当我编译项目时，我在 maven 日志中看到以下条目：

[INFO] --- aspectj-maven-plugin:1.8:compile (AspectJ-Classes) @ testMaven ---
[INFO] Showing AJC message detail for messages of types: [error, warning, fail]
[INFO] Join point 'method-execution(void testMaven.aaaa.aa(int))' in Type 'testMaven.aaaa' (aaaa.java:5) advised by before advice from 'testMaven.aspecter' (aspecter.java:10)

当我现在按如下方式执行 jar 时，我看到以下结果：

...>java -cp target/testMaven-0.0.1-SNAPSHOT-jar-with-dependencies.jar testMaven/MainApp
yooi
2

假设MainApp如下：

package testMaven;

public class MainApp {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        aaaa a = new aaaa();
        a.aa(2);
    }

}

发起的class打印传递的参数

package testMaven;

public class aaaa {

    public void aa(int a){
        System.out.println(a);
    }
}

拦截器如下

package testMaven;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.annotation.Before;


@Aspect
public class aspecter {
    @Before("execution(*  testMaven.aaaa.aa(..))")
    public void testBefore(){
        System.out.println("yooi");
    }
}

我会说它有效:)

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