Problems using Selectonemenu primefaces

Question

I have a problem to update the data of a Selectonemenu in the primefaces, as suggested by the code below, I have a button that when clicked, brings data of a Webservice and stores in a variable of Devices in back-end and right after, play only their names to the list deviceNames, this is because I print the Size of the list with the names and is OK, it happens that nothing appears in my Selectonemenu. I’ve already made many changes but so far nothing. It seems to be pretty silly but I can’t find the problem.

Page XHTML

<h:body>
    <p:messages autoUpdate="true"/>
    <h:form id="mainform">
        <p:commandButton id="button1" 
                         value="Configuração">
            <p:ajax listener="#{config.carregaSbcDevices}" update="panelAU"/>
        </p:commandButton>
        <p:outputPanel autoUpdate="true" id="panelAU">
            <p:selectOneMenu value="#{config.configSCBEsc}">
                <f:selectItem itemLabel="Selecione..." itemValue="" />
                <f:selectItems value="#{config.devicesName}" />
            </p:selectOneMenu>
        </p:outputPanel>
    </h:form>
</h:body>

Bean config

public void carregaSbcDevices() {
    if(this.devices == null) this.devices = new ArrayList<>();
    this.devices.clear();

    if(this.devicesName == null) this.devicesName = new ArrayList<>();
    this.devicesName.clear();

    session.getDevices(this.devices);
    for(SBCDevices device : this.devices) {
        this.devicesName.add(device.getTargetName());
    }

    System.out.println("Numero: " + this.devicesName.size());
}

Answer 1

Maybe your ajax update is not finding the component panelAU. This is because when rendering on the screen the primefaces add the name of the form next to the name that was defined.

That is. Possibly the compontante id panelAU is as: mainform.panelAU.

Change this piece of code:

<p:ajax listener="#{config.carregaSbcDevices}" update="panelAU"/>

To:

<p:ajax listener="#{config.carregaSbcDevices}" update="mainform.panelAU"/>

If it still doesn’t work. Inspect the generated html and put exactly the id that was generated.

Answer 2

Fixed Problem!

After minor daily failed attempts, I noticed that the same code made by other developers did not present error, when searching for solutions in the Packages I was using discovered the error, the Imports of the SessionScoped and of Named (I use this instead of @ManagedBean(name = 'beanName'). Therefore, I solved by making the following changes:

Alias of the Bean:

@Named(value = "beanAgregadorDetalhe")

And the import thereof:

import javax.inject.Named;

Session Scope:

@SessionScoped

And the import thereof:

import javax.enterprise.context.SessionScoped;

That way the scopes work perfectly now and the page talks normally with the bean without the need for static variables. Anyone with a problem of manipulated variables in a given scope, Watch out for Miles!