Build-time weaving with @Configurable

[cepage]

I have been able to use ajc (1.5.2) to effectively weave aspects declared with the @Aspect annotation. But I don't seem to be getting it to weave beans with the @Configurable annotation.

I have tried to follow the instructions in the docs, but I am sure that I am missing something.

I compiled with spring-aspects.jar in my classpath. I added:

<aop:spring-configured/>

to my application context. To be safe, I added:

depends-on="org.springframework.beans.factory.aspectj.Anno tationBeanConfigurerAspect"

to the first bean that executes on startup. And I added:

@Configurable( autowire = Autowire.BY_NAME )

to the domain object that I wanted to wire.

However, on startup I get a null pointer exception because the dependency was never wired. Do I need to do something else to tell ajc how to weave this class?

[Colin Yates]

I believe that Spring2 still uses CGLIB by default so make sure your class/methods aren't final.

Not definitive, just a quess.....this all might be a big fat lie

[geirhe]

However, on startup I get a null pointer exception because the dependency was never wired. Do I need to do something else to tell ajc how to weave this class?

Have you tried getting ajc to print debug information during weaving? That made stuff a whole lot clearer for me when I tried load-time weaving.

[ThomasCorbin]

It's a great little tool when it works. I am not sure it worked in all classes, but it definitely worked in some of them.

[cepage]

You are right, Thomas. My problem is not specific to build-time weaving. The @Configurable stuff is just not working consistently.

I switched over to using the plain @Configurable() annotation, and explicitly declaring my beans as wired prototypes, and I get the same failures.

Are there any test cases in the Nightly Build sources that demonstrates @Configurable working? I could use this as a baseline to file a bug report with a working counterexample.

[GrantGochnauer]

I am also having problems with @Configurable.

For example, take a standard bean class called Order

@Configurable
public class Order implements Serializable
{
private Integer _deliveryMinuteWindowInterval;

public Integer getDeliveryMinuteWindowInterval()
    {
        return _deliveryMinuteWindowInterval;
    }
public void setDeliveryMinuteWindowInterval( Integer deliveryMinuteWindowInterval )
    {
        _deliveryMinuteWindowInterval = deliveryMinuteWindowInterval;
    }
}

My XML is defined as:

<aop:spring-configured/>

    <bean id="deliveryWindowMinuteInterval" class="java.lang.Integer">
        <constructor-arg>
            <value>15</value>
        </constructor-arg>
    </bean>

<bean class="com.vodori.dolce.component.commerce.model.Order" lazy-init="true">
       <property name="deliveryMinuteWindowInterval" ref="deliveryWindowMinuteInterval" />
     </bean>

However, everytime an order object is created anywhere in the system the deliveryMinuteWindowInterval is null....

Any ideas? This is using RC3 snapshot from 7-26-2006

Thanks!

[geirhe]

Any ideas? This is using RC3 snapshot from 7-26-2006

If this is all you have done, you have not made Spring aware of the Configurable annotation. <aop:spring-configured/> is _not_ enough. You either need to use load-time aspectj weaving, or you need to use the aspectj compiler to get compile-time weaving of the aspect related to the @Configurable annotation.

This is described in several articles on the 'net. I suggest you have a look around for those.

[debasishg]

Hi cepage -

Have u followed the instructions in section 7.7.4 ?

- creation of aop.xml
- add -javaagent:<path-to-ajlibs>/aspectjweaver.jar as VM arguments

Regards.
- Debasish

[cepage]

Hi cepage -

Have u followed the instructions in section 7.7.4 ?

- creation of aop.xml
- add -javaagent:<path-to-ajlibs>/aspectjweaver.jar as VM arguments

Section 6.7.4 specifies that those steps are necessary for load-time weaving, but I am performing build-time weaving. My understanding is that these steps are not necessary for build-time weaving. Thanks for your help, though.

[thomasvdv]

So are there any solution here to make this work with build-time weaving? I have AJDT installed and still I get the nullpointer with @Configurable. My domain object is created with the new operator in a AbstractDependencyInjectionSpringContextTests which loads the applicationcontext.