My Plugin view when called from other plugin throws a NPE

Question

I have created a plugin view (source ) and am trying to update it from other plugin (target).

I have done following and still getting a NPE , please help:

Exported all the packages including the view class in (source) plugin
Included the package visibility to the (target) plugin
Added the (source) plugin as Required Plugin in dependencies tab

(Source Plugin)

<plugin>
   <extension
         point="org.eclipse.ui.views">
      <view
            class="com.he.reportLayer.views.BrowserView"
            id="com.he.reportLayer.views.BrowserView"
            name="Live Reporter!">
      </view>
   </extension>
</plugin>

(Target Plugin)

 BrowserView view=null;
            try {
                view =(BrowserView)PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView("com.he.reportLayer.views.BrowserView");
            } catch (PartInitException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

getWorkbench, getActiveWorkbenchWindow, getActivePage and showView can all return null - so which one is it? Do some debugging! — greg-449, Jan 07 '15 at 19:26
So you are running this code when there is no window open. How is this code being run? — greg-449, Jan 08 '15 at 07:32
Code is being invoked from other plugin and workbench windows are open as show in screenshot. Run As > Run Script > ILaunchShortcut call some class A in other plugin which invokes the view to update it. — Amrit, Jan 08 '15 at 08:14
As per the link http://stackoverflow.com/questions/1265174/nullpointerexception-in-platformui-getworkbench-getactiveworkbenchwindow-get I wrapped the view updates in a Runnable thread but view is getting updated in last not in sync with execution. — Amrit, Jan 08 '15 at 08:20
Any help here !! please advice the best way to update your views be it same plugin or from some other plugin. — Amrit, Jan 08 '15 at 12:35
What is 'Run Script > ILaunchShortcut'? This is not part of core Eclipse — greg-449, Jan 08 '15 at 13:03
These are coming from org.eclipse.debug.ui.launchShortcuts extension point for the plugin and clicking on Run Script calls class implementing ILaunchShortcut — Amrit, Jan 08 '15 at 13:17
If you want to test plugins you need to use 'Run As > Eclipse Application' — greg-449, Jan 08 '15 at 13:38
I am getting NPE as I am trying to update the view from a Non UI thread — Amrit, Jan 09 '15 at 09:35

score 0 · Accepted Answer · answered Jan 20 '15 at 08:08

Couple of changes solved the problem :

When you are updating your view from a Non UI thread use :

Display.getDefault().asyncExec(new Runnable() { public void run() {

            IWorkbenchWindow iw =
                PlatformUI.getWorkbench().getActiveWorkbenchWindow();
            try {
                view =
                        (BrowserView) iw.getActivePage().showView(
                            "com.he.reportLayer.views.BrowserView");
                view.getBrowserInstance().setUrl(url);
            } catch (PartInitException e) {
                e.printStackTrace();
            }
           // System.out.println("View >>" + view);
        }
    });

Use eclipse jobs API https://eclipse.org/articles/Article-Concurrency/jobs-api.html for not blocking the UI

My Plugin view when called from other plugin throws a NPE

1 Answers1