startup class in Weld

Question

I am trying to define a startup class for my application in Weld CDI with @Singleton and @Startup annotations (running on tomcat 7), but my PostConstruct method is never called.

Here is my Startup class:

import java.util.List;
import java.util.logging.Logger;

import javax.annotation.PostConstruct;
import javax.ejb.Startup;
import javax.inject.Inject;
import javax.ejb.Singleton;
import javax.persistence.EntityManager;

import se.raindance.squid.core.domain.SquidSettings;


@Singleton 
@Startup
public class InitSquid {

  @Inject   
  private Logger log;  

  @Inject
  EntityManager entityManager;

  @PostConstruct
  public void init() {

    System.out.println("startup!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! InitSquid");
    // Init Rainlets
InitRainlets initRainlets = new InitRainlets(entityManager);
    initRainlets.init();

    initSquidSettings();    
  }

  private void initSquidSettings() {
    List<SquidSettings> settingsList = (List<SquidSettings>) entityManager
        .createQuery(
            "select squidsettings from SquidSettings squidsettings")
        .getResultList();

    if (settingsList.size() == 0) {
        log.info("No SquidSettings entity exists in system, creating one");

        SquidSettings settings = new SquidSettings();
        settings.setSubledgerRestResourceURI("http://localhost:8080/subledger-webapp/resteasy/");
        entityManager.persist(settings);
    }
  }

}

I tried the hints which I found in these two posts Startup POJO with WELD and Startup EJB doesn't work but neither helped

Hudson

Could you please post the import section of your java class? – Aggressive

I updated java class with all imports – Hudson

Pease try to remove javax.ejb.Startup and javax.ejb.Singleton and use only the javax.inject.Singleton. Please do not mix EJB and CDI. – Aggressive

But I want to create a class to run at the server startup. Can I run a singleton class in server startup without using Startup annotation !? – Hudson

I have the same issue. Don't know how you're getting on with this, but in my case javax.inject.Singleton DOES NOT start when Tomcat starts. It only starts after the resource into which the Singleton is injected has been started. – Heathen

Answer 1

You can not use the @Startup or @javax.ejb.Singleton annotations on a CDI bean: those annotations are meant for EJB's. And EJB's won't work on (plain) Tomcat. If you want to run an EE application on Tomcat, take a look at the TomEE project.

However, there's an AfterDeploymentValidation event that's thrown after everything has been deployed. You can write an observer method to act on that event, as shown in this blog post here:

• Eager CDI beans

Mayonnaise