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:
@Aspect
public class VeryImportantAspect {
...
public void setSomeDependency( SomeDependency dependency ) {
this.dependency = dependency;
}
...
} |
@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"
class="org.dotkam.VeryImportantAspect"
factory-method="aspectOf">
<property name="someDependency" ref="someDependency"/>
</bean> |
<bean id="veryImportantAspect"
class="org.dotkam.VeryImportantAspect"
factory-method="aspectOf">
<property name="someDependency" ref="someDependency"/>
</bean>
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()' |
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:
<context:load-time-weaver/> |
<context:load-time-weaver/>
If you run with the above configuration without doing anything, you would get a following error:
ClassLoader does NOT provide an 'addTransformer(ClassFileTransformer)' method |
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:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.3</version>
<executions>
<execution>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
<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>
</plugin> |
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.3</version>
<executions>
<execution>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
<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>
</plugin>
Adding a Spring Instrument agent to participate in a test execution:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.4</version>
<configuration>
<forkMode>once</forkMode>
<argLine>
-javaagent:"${settings.localRepository}/org/springframework/spring-instrument/${spring.framework.version}/spring-instrument-${spring.framework.version}.jar"
</argLine>
<useSystemClassloader>true</useSystemClassloader>
</configuration>
</plugin> |
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.4</version>
<configuration>
<forkMode>once</forkMode>
<argLine>
-javaagent:"${settings.localRepository}/org/springframework/spring-instrument/${spring.framework.version}/spring-instrument-${spring.framework.version}.jar"
</argLine>
<useSystemClassloader>true</useSystemClassloader>
</configuration>
</plugin>
And all that work, just too see a couple of lines from Maven:
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------ |
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
