public void metadataInstalling(RepositoryEvent event) {
        println("metadataInstalling", event.getMetadata() + " to " + event.getFile());
    }

    @Override
    public void metadataInvalid(RepositoryEvent event) {
        println("metadataInvalid", event.getMetadata().toString());
    }

    @Override
    public void metadataResolved(RepositoryEvent event) {

        if (listener != null) {
            RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
            event.setTrace(trace);
            event.setMetadata(metadata);
            event.setException(exception);
            event.setRepository(repository);
            listener.metadataInvalid(event.build());
        }
    }

            Metadata metadata,
            ArtifactRepository repository,
            Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.METADATA_INVALID);
        event.setTrace(trace);
        event.setMetadata(metadata);
        event.setException(exception);
        event.setRepository(repository);

        repositoryEventDispatcher.dispatch(event.build());