JAVA

Execute method on load alternative

<f:metadata>
    <f:viewParam name="token" value="#{authenticator.token}" />
    <f:event type="preRenderView" listener="#{authenticator.check}" />
</f:metadata>

Execute method on load alternative

@ManagedBean
@RequestScoped
public class Authenticator {

    private String token;

    public void check() throws IOException {
        if (!isValid(token)) {
            FacesContext.getCurrentInstance().getExternalContext().redirect("main.jsf");
        }
    }

    // Getter/setter.
}