Running Spring AspectJ Tests with Maven

You need to use a real AspectJ aspect with Spring, where you would like to inject some dependencies into this aspect as a Spring container starts up.

Here is an AspectJ aspect:

public class VeryImportantAspect {
    public void setSomeDependency( SomeDependency dependency ) {
        this.dependency = dependency;

Now let’s define it as a bean and inject “someDependency”:

<bean id="veryImportantAspect" 
         <property name="someDependency" ref="someDependency"/>

Notice factory-method=”aspectOf” that tells Spring to use a real AspectJ ( not Spring AOP ) aspect to create this bean. In reality, if the “VeryImportantAspect” was already woven in, it will have an “aspectOf” method.

Hence if you get this error at some point:

No matching factory method found: factory method 'aspectOf()'

That would mean that the aspect was not woven by AspectJ weaver.

We also need to tell Spring to use load time weaving:


If you run with the above configuration without doing anything, you would get a following error:

ClassLoader does NOT provide an 'addTransformer(ClassFileTransformer)' method

That tells you ( well not explicitly 🙂 ) to include a “spring-instrument.jar” javaagent.

So at this point two things need to be added: AspectJ weaver and Spring Instrument agent. Build / Continues integration server does not use any IDE, so it is not as simple as downloading AspectJ plugin for IDEA / Eclipse and including VM arguments in Run Configurations… It is simpler: just add the two in your POM file.

Adding an AspectJ plugin:

                 <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 -->

Adding a Spring Instrument agent to participate in a test execution:


And all that work, just too see a couple of lines from Maven:

[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------