[Resolvido] Erro com vraptor-simplemail

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import br.com.caelum.vraptor.ioc.ApplicationScoped;
import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.ioc.ComponentFactory;


@Component
@ApplicationScoped
public class ThreadProvider implements ComponentFactory<ExecutorService> {
    private ExecutorService pool;

    @PostConstruct
    public void initialize() {
        this.pool = Executors.newFixedThreadPool(10);
    }
    
    
    public ExecutorService getInstance() {
        return this.pool;
    }

    @PreDestroy
    public void shutdown() {
        this.pool.shutdown();
    }
}