Primefaces Dialog Framework and Parameters

Question

I am having trouble passing a parameter to a dialog that I can actually use.

I have a command button which is is set with an actionListener that calls an open dialog method in the backing bean

Map<String, Object> options = new HashMap<>();
options.put("modal", true);
//...
options.put("includeViewParams", true);

Map<String, List<String>> params = new HashMap<>();
List<String> values = new ArrayList<>();
values.add("My String");
params.put("myParam", values);

PrimeFaces.current().dialog().openDynamic("test", options, params);

then in my test page I gave

<f:metadata>
  <f:viewParam name="myParam" value="#{testBean.testVal}" />
</f:metadata>
...
<h:outputText value="#{testBean.testVal}" />

and the string is output fine.

But I want to use that value in to perform a database lookup and this just isn't working.

private String myParam;
private List<Object> myThings;

@PostConstruct
public void init() {
  myThings = service.lookup(myParam);
}

but in the PostConstruct call myParam is null.

I added some logging on init and the getter and setter and noticed I had

• init --> myParam null
• Getter --> myParam null
• Setter --> myParam = passed value
• Getter --> myParam = passed value
• Getter --> myParam = passed value

So it appears that the value is getting passed but after the PostConstuct method has fired.

An I doing something wrong or should I be doing this another way? (I have seen reference of passing objects via the session map but is there a way of getting this working like this?)