Liferay warns user when portlet is not present

Question

Suppose portlet X is deployed in Liferay and has a friendly URL. Suppose a user logs into the Liferay Portal through a mapped URL, but the portlet is not in the portal — it is deployed but not added to the page.

My problem is that when the user uses the associated URL, nothing happens - the portal does not give visual feedback that the target portlet is missing.

How can i change this? I need some warning / notification to user ...

- change -

I do not need to use a second portlet to check for another portlet.

Regards,

Answer 1

AFAIK, . . , .

, :

• ThemeDisplay JSP <liferay-theme:defineObjects />, ThemeDisplay JSP.

• , :

  String typeSettings = themeDisplay.getLayout().getTypeSettings();
  

• :

  layout-template-id=foobar_2column
  sitemap-include=1
  column-1=foo_WAR_barportlet,abc_WAR_barportlet,56_INSTANCE_K4Vv,
  column-2=baz_WAR_xyzportlet,
  sitemap-changefreq=daily
  

• , foo WAR bar, foo_WAR_barportlet.

• , , , .

  <% if(!typeSettings.contains("foo_WAR_barportlet")) { %>
      <h3 style="color: red">Alert! Portlet foo_WAR_barportlet not installed.</h3>
  <% } %>
  

, Velocity Java. , .

portal_normal.vm

#if(!$layout.getTypeSettings().contains("foo_WAR_barportlet"))
    <h3 style="color: red">Alert! Portlet foo_WAR_barportlet not installed.</h3>
#end

Answer 2

, , Inter-portlet communication, , . ( ListenerPortlet), .

Listener , ​​ .

, , javascript- Listener , .

Liferay.trigger(eventName, data)

Listener

 Liferay.bind(eventName, function, [scope]) //make the scope as page

, , . , .

IPC

, ,

Answer 3

It would be better if we try this,

ThemeDisplay themeDisplay = request.getAttribute(WebKeys.THEME_DISPLAY);

Layout layout = LayoutLocalServiceUtil.getLayout(themeDisplay.getLayout().getPlid());
LayoutTypePortlet layoutTypePortlet = (LayoutTypePortlet)layout.getLayoutType();

List allPortletIds = layoutTypePortlet.getPortletIds();

If the list is empty, the page does not contain any portlets.

Gettings LayoutTypePortletensures that the page the user has been redirected to is a layout type portlet.