Using Refresher

Flow
1

Hi,

I’m using refresher to update a page with messages coming from an ActiveMQ.
I’ve made a view and my init method is like this:


@PostConstruct
   public void initialize ()
   {     
      final Refresher refresher = new Refresher();
      refresher.setRefreshInterval(500);
      refresher.addListener(new TextRefreshListener());
      addExtension(refresher);
 
      //conversation is a label where I want to display the texts coming from the ActiveMQ
      layout.addComponent(conversation); 

      setCompositionRoot(layout);
   }

Of course I have implemented the TextRefreshListener class.
The problem is that calling
addExtension(refresher)
 makes the components disappear from the view (they are not added) and I’ve never got the refresher working.

I was basing my code on the Chat application example (https://vaadin.com/ca_ES/web/henrik/wiki/-/wiki/Main/Simple%20Chat/) but now the Refresher is not a component anymore. I’ve had a look at the example in the add-on page but I don’t want to create threads… I just want to call a certain bunch of code every x seconds.

What am I missing to make the refresher work and why aren’t my components displayed?

Thank you!

2

Ok, I found the problem. I didn’t know about the custom widgetset. I had to add it to web.xml like this:


<init-param>
	<param-name>widgetset</param-name>
	<param-value>com.mypackage.AppWidgetSet</param-value>
</init-param>