Using AspectJ to recognize method calls - maven

Question

I like to use AspectJ to recognize when a certain method is called within another OSGi bundle I don't have the source code for. Therefore, I build an aspect-bundle. For learning puposes the other bundle is implemented by a sample bundle which simply implements a "sayHello" method. The aspect-bundle is now supposed to recognize whenever this method is called.
Here is what I have so far:
normal bundle
HelloWorld.java
package com.mango.sample.helloworld;
public class HelloWorld {
public void sayHello() {
System.out.println("Hello world");
}
}
Activator.java
package com.mango.sample.helloworld;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
private static BundleContext context;
public void start(BundleContext bundleContext) throws Exception {
Activator.context = bundleContext;
HelloWorld test = new HelloWorld();
test.sayHello();
}
public void stop(BundleContext bundleContext) throws Exception {
Activator.context = null;
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.mango.sample</groupId>
<artifactId>helloworld</artifactId>
<version>0.1</version>
<packaging>bundle</packaging>
<name>helloworld</name>
<prerequisites>
<maven>3.0.4</maven>
</prerequisites>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.2.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Import-Package>*</Import-Package>
<Bundle-SymbolicName>${project.groupId}.${project.artifactId}</Bundle-SymbolicName>
<Bundle-Name>${project.name}</Bundle-Name>
<Bundle-Version>${project.version}</Bundle-Version>
<Bundle-Activator>com.mango.sample.helloworld.Activator</Bundle-Activator>
</instructions>
<manifestLocation>${project.basedir}/META-INF</manifestLocation>
</configuration>
</plugin>
</plugins>
</build>
</project>
aspect-bundle
Activator.java
package com.mango.sample.helloworldj;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
public class Activator implements BundleActivator {
private static BundleContext context;
public void start(BundleContext bundleContext) throws Exception {
Activator.context = bundleContext;
}
public void stop(BundleContext bundleContext) throws Exception {
Activator.context = null;
}
}
AspectJTest.aj
package com.mango.sample.helloworldj;
public aspect AspectJTest {
before() : execution(* *.sayHello()) {
System.out.println("Before execution sum");
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.mango.sample</groupId>
<artifactId>helloworldj</artifactId>
<version>0.1</version>
<packaging>bundle</packaging>
<name>helloworldj</name>
<prerequisites>
<maven>3.0.4</maven>
</prerequisites>
<dependencies>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.2.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.2</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.7.0</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Import-Package>*</Import-Package>
<Bundle-SymbolicName>${project.groupId}.${project.artifactId}</Bundle-SymbolicName>
<Bundle-Name>${project.name}</Bundle-Name>
<Bundle-Version>${project.version}</Bundle-Version>
<Bundle-Activator>com.mango.sample.helloworldj.Activator</Bundle-Activator>
<Export-Package>com.mango.sample.helloworldj;aspects=AspectJTest</Export-Package>
</instructions>
<manifestLocation>${project.basedir}/META-INF</manifestLocation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.3</version>
<configuration>
<complianceLevel>1.5</complianceLevel>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
After compiling, I start equinox (separately from eclipse)
configuration/config.ini
osgi.framework.extensions=org.eclipse.equinox.weaving.hook_1.0.200.I20130319-1000.jar
osgi.bundles=\
reference\:file\:../lib/org.apache.felix.fileinstall-3.1.6.jar#1:start,\
reference\:file\:../lib/org.eclipse.osgi.services-3.3.100.v20120522-1822#2:start,\
reference\:file\:../lib/org.eclipse.equinox.console-1.0.0.v20120522-1841.jar#start,\
reference\:file\:../lib/slf4j-api-1.7.2.jar#1:start,\
reference\:file\:../lib/logback-classic-1.0.9.jar#1:start,\
reference\:file\:../lib/logback-core-1.0.9.jar#1:start,\
reference\:file\:../lib/org.aspectj.runtime_1.7.3.20130613144500-a.jar#2:start
and the options:
-Daj.weaving.verbose=true
-Dorg.aspectj.weaver.showWeaveInfo=true
-Dorg.aspectj.osgi.verbose=true
Then, I install and start the aspect bundle and the other bundle afterwards. After starting the HelloWorld bundle, I expected something like this
Before execution
Hello world
But I got only Hello world. I guess there is going something wrong with weaving the aspects into the helloworld bundle. Is there something missing in the pom.xml files?
How can I solve it?