Re: [sisu-users] Annotation processor not picking custom qualifiers

[gian.maria.romanato@xxxxxxxxxxxx]

Hello Stuart,

In plain Java application everything works as expected, but my application is an OSGi application developed using Eclipse PDE and built using Maven/Tycho.

As you suggested, in my case the index was generated by the Sisu APT and therefore only for those bundles that have a direct dependencies toward Sisu (for example, because they use the Mediator API or the Sisu @Priority annotation).
To the contrary, the sisu-maven-plugin was either not called or its output not collected during build.
I was eventually able to have the index generated by the sisu-maven-plugin included in the bundles by changing the phase from "package" to "compile".

Don't know why it does not work during the "package" phase, maybe it's a problem with Tycho. For the records, we are using Tycho version  0.22.0

Thanks for your help.
GianMaria


-----sisu-users-bounces@xxxxxxxxxxx wrote: -----

To: Sisu project community <sisu-users@xxxxxxxxxxx>
From: Stuart McCulloch
Sent by: sisu-users-bounces@xxxxxxxxxxx
Date: 08/28/2015 01:40PM
Subject: Re: [sisu-users] Annotation processor not picking custom qualifiers

Hi Gian,

This works for me locally with a simple setup, could you provide more details about your pom.xml?  Perhaps a public project that recreates the issue?

Is the library containing MyQualifier a compile dependency of the project where you’re doing the index? The indexer needs access to the annotation bytecode to verify it is a qualifier.

Also note that the APT6 annotation processor behaves slightly differently to the sisu-maven-plugin for performance reasons (because it’s automatically triggered when you compile using Java6+ with Sisu on the project classpath). By default it only looks for @Named, as this is very fast given the information immediately available in APT, but you can tell it to look for other qualifiers with the “qualifiers” option:

      <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-compiler-plugin</artifactId>

        <version>3.3</version>

        <configuration>

          <compilerArgs>

            <arg>-Aqualifiers=ALL</arg>

          </compilerArgs>

        </configuration>

      </plugin>

-- 

Cheers, Stuart

On Friday, 28 August 2015 at 09:25, gian.maria.romanato@xxxxxxxxxxxx wrote:

Hello,

I have a custom qualifier defined as follows:

@Documented
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Qualifier
public @interface MyQualifier {
}


@MyQualifier
public class MyComponent {

}

And I am using the sisu annotation processor in the maven build of my osgi application to produce the Named index:

            <plugin>
                <groupId>org.eclipse.sisu</groupId>
                <artifactId>sisu-maven-plugin</artifactId>
                <version>0.3.0</version>
                <executions>
                    <execution>
                        <id>index-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>index</goal>
                        </goals>
                        <configuration>
                            <!-- same include/exclude settings as maven-dependency-plugin -->
                        </configuration>
                    </execution>
                </executions>
            </plugin>

It turns out that classes annotated @Named show up in the index, while classes annotated @MyQualifier don't.

What am I doing wrong? This was tricky to find out because in development I am using BeanScanning=ON
while when deploying the final application I am using BeanScanning=INDEX under the assumption that the APT
would list in the index file also classes featuring my custom qualifier.

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