Saturday, March 20, 2010

Using AspectJ for AOP on Maven project

AspectJ is used for Aspect Oriented Programming (AOP) in Java.

To configure AspectJ inside a Maven project you use aspectj-maven-plugin.

Modify your Maven project's pom.xml as follows:

<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">
...
    <properties>
        <aspectj.version>1.6.8</aspectj.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <version>1.3</version>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>       <!-- use this goal to weave all your main classes -->
                            <goal>test-compile</goal>  <!-- use this goal to weave all your test classes -->
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.aspectj</groupId>
                        <artifactId>aspectjtools</artifactId>
                        <version>${aspectj.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

When you want to upgrade AspectJ version, simply change aspectj.version from properties.