[Help] Generated classes are not picked up by Sisu, even though the javax.inject.Named file contains them

[HomeOfTheWizard]

Hi,

My issue may not be an issue on the plugin, but in my usage of it.
I am developping a plugin that uses JSR330 annotations.

During the "Compile" phase of maven lifecycle, I am generating at runtime some javax.inject.Provider classes that are tagged with @Named JSR330 annotations and storing them in the classpath.

Here is the decompiled class

package com.homeofthewizard;

import com.homeofthewizard.hellolib.MyFriend;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;

@Named
public class MyFriendProvider implements Provider<MyFriend> {

    public MyFriend get() {
        return new MyFriend();
    }
}

During Package phase, the sisu-maven plugin takes them into account when indexing. I checked the file generated and all seems ok.

com.homeofthewizard.MyFriendProvider
org.apache.maven.DefaultArtifactFilterManager
org.apache.maven.ReactorReader
org.apache.maven.classrealm.DefaultClassRealmManager
org.apache.maven.execution.DefaultMavenExecutionRequestPopulator
org.apache.maven.execution.scope.internal.MojoExecutionScopeCoreModule
org.apache.maven.extension.internal.CoreExportsProvider
....

But when I execute my plugin, the classes are not found, and the providers are not injected by sisu.
Here is my mojo:

package com.homeofthewizard;

import com.homeofthewizard.hellolib.MyFriend;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugins.annotations.Mojo;
import org.codehaus.plexus.logging.Logger;

import javax.inject.Inject;

@Mojo( name = "sayhi")
public class MyMojo extends AbstractMojo
{
    private final Logger logger;
    private final MyFriend helloer;

    @Inject
    public MyMojo(Logger logger, MyFriend helloer) {
        this.logger = logger;
        this.helloer = helloer;
    }

    public void execute()
    {
        logger.info("executing mojo");
        helloer.hello();
    }
}

Here is the error:

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.486 s
[INFO] Finished at: 2023-07-14T17:44:47+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT:sayhi (default-cli) on project spring-bridge-demo-maven-plugin: Execution default-cli of goal com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT:sayhi failed: Unable to load the mojo 'sayhi' (or one of its required components) from the plugin 'com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT': com.google.inject.ProvisionException: Unable to provision, see the following errors:
[ERROR] 
[ERROR] 1) null returned by binding at org.eclipse.sisu.wire.LocatorWiring
[ERROR]  but the 2th parameter of com.homeofthewizard.MyMojo.<init>(Unknown Source) is not @Nullable
[ERROR]   at org.eclipse.sisu.wire.LocatorWiring
[ERROR]   while locating com.homeofthewizard.hellolib.MyFriend
[ERROR]     for the 2th parameter of com.homeofthewizard.MyMojo.<init>(Unknown Source)
[ERROR]   while locating com.homeofthewizard.MyMojo
[ERROR]   at ClassRealm[plugin>com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@512ddf17] (via modules: org.eclipse.sisu.wire.WireModule -> org.eclipse.sisu.plexus.PlexusBindingModule)
[ERROR]   while locating org.apache.maven.plugin.Mojo annotated with @com.google.inject.name.Named(value="com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT:sayhi")
[ERROR] 
[ERROR] 1 error
[ERROR]       role: org.apache.maven.plugin.Mojo
[ERROR]   roleHint: com.homeofthewizard:spring-bridge-demo-maven-plugin:1.0-SNAPSHOT:sayhi
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException

Process finished with exit code 1

I am using maven 3.9.1
Java 11 as source and bytecode.

Am I missing something here ? Can you please help me pinpoint the issue ? 🙏

[mcculls]

Hi @HomeOfTheWizard - have you tried turning on debug with -Dsisu.debug to get more information?

It's possible that there's a missing class/dependency somewhere which is causing that class not to load.