Comments on Eclipse Tips - Prakash G.R.: Commands Part 5: Authentication in RCP application...

Hello Prakash, I have created a custom GEF editor...

2011-01-07T19:49:56.558+05:30

Hello Prakash,

I have created a custom GEF editor and intend to add figures to the editor using context menu of the editor instead of the Palette. However, I am not able to understand how to go about it. Can you please guide me with the same?

Hi Prakash, So nice to get your mail. For the ben...

2010-11-05T15:39:11.523+05:30

Hi Prakash,
So nice to get your mail.
For the benefit of community I am posting solution here.
I did some research in my problem, below solution worked greatly.

regards
Parvez Ahmad Hakim
Srinagar Kashmir
parvez12@gmail.com

public class OpenHandler extends AbstractHandler {

@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
execute();
return null;
}
@Execute
public void execute() {
// my code... Ahmad
}

@CanExecute
public boolean canExecute() {
//TODO Your code goes here
return true;
}
}

mnuOpen.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
executeCommand(OpenHandler.class,true);
}
});

public void executeCommand(Class cmdHandler, Boolean showBusy) {
// Hint taken from http://wiki.eclipse.org/E4/Snippets

try {
Bundle bundle = FrameworkUtil.getBundle(cmdHandler);
BundleContext bundleContext = bundle.getBundleContext();
IEclipseContext eclipseCtx = EclipseContextFactory.getServiceContext(bundleContext);
ECommandService commandService = eclipseCtx.get(ECommandService.class);
EHandlerService handlerService = eclipseCtx.get(EHandlerService.class);
Command cmd = commandService.getCommand(cmdHandler.getName());
cmd.setHandler((IHandler) cmdHandler.newInstance());
cmd.execute(null);
System.out.println("command executed :" + cmdHandler.getName());
//ParameterizedCommand myCommand = commandService.createCommand(command, null);
//Object result = handlerService.executeHandler(myCommand);
//handlerService = (IHandlerService ) PlatformUI.getWorkbench().getService(IHandlerService.class);
//handlerService.executeCommand(command, null);
}catch(NotHandledException ex){
throw new RuntimeException("Failed to execute command --" + cmdHandler.getName() + " " + ex.getMessage());

}catch (Exception ex) {
throw new RuntimeException("Failed to execute command --"+cmdHandler.getName() +" Error:" + ex.getMessage());
}finally{

}
}

Alternative solution is:-
public void executeCommand(String command) {

//IHandlerService handlerService = (IHandlerService) parentViewGetSite
// .getService(IHandlerService.class);
Bundle bundle = FrameworkUtil.getBundle(IEvaluationService.class);
BundleContext bundleContext = bundle.getBundleContext();
IEclipseContext eclipseCtx = EclipseContextFactory.getServiceContext(bundleContext);
ECommandService commandService = eclipseCtx.get(ECommandService.class);
try {
commandService.getCommand(command).execute(null);
}catch(NotHandledException ex){
throw new RuntimeException("Failed to execute command --" + command + " " + ex.getMessage());
}
catch (Exception ex) {
throw new RuntimeException("Failed to execute command --" + command);
}finally{

}
}

In e4, you don't need to have a serviceLocator...

2010-11-04T10:54:14.456+05:30

In e4, you don't need to have a serviceLocator. You can make a service as a field and mark it with @Inject. The DI mechanism will find you the service in the context hierarchy and then inject an implementation of the service into that field. I suggest you go thru some e4 docs and e4 forums.

Hi Prakash Struggling since morning for injection ...

2010-11-04T00:52:26.099+05:30

Hi Prakash
Struggling since morning
for injection in e4 eclipse,
I want to execute a command, I have null for PlatformUI.getSite()

My problem is basically getting the workbench.
PlatformUI.getWorkbench and getsite is null because I am invoking the plugin using injection

My case is Project A contains normal workbench
class, project B calls A using injection
So I want to execute the command defined in plugin.xml in A
I was earlier using PlatFormUI.getWorkbench to call command using Ihandler

, that now returns work bench is not created.
ICommandService commandService = (ICommandService.class)serviceLocator.getService(ICommandService.class);
commandService.refreshElements(commandId, null);

can you mention exact code for
serviceLocator, like how to get it while another project is injected

Parvez Ahmad Hakim
Srinagar Kashmir

Hi Prakash, is there any way we can get the callba...

2010-08-31T14:22:11.753+05:30

Hi Prakash, is there any way we can get the callback to the command handler whenever a main menu (in this case File menu) is selected?
I want to enable/disable the command (Login) based on some other criteria (other than selection change) and I want the callback to isEnabled() method, once I click File main menu.

Thanks

Thanks a lot Prakash! great instructions for this ...

2010-05-14T05:59:01.505+05:30

Thanks a lot Prakash!
great instructions for this common issue.

I owe you much ;)

@pixelatedpete, Also if you need any reference ...

2010-04-27T21:43:33.271+05:30

@pixelatedpete,
Also if you need any reference on existing source provider implementation, you can have a look at Platform UI's WorkbenchSourceProvider

Thanks for a useful set of posts! I've finally...

2010-04-27T21:32:31.068+05:30

Thanks for a useful set of posts! I've finally managed to get my commands turning on and off on the basis on a selection that isn't active! Phew!

There seems the be a type in SessionSourceProvider (probably not a surprise given your reply to another comment like this...) but:

fireSourceChanged(ISources.WORKBENCH, SESSION_STATE, currentState);

either needs to be:

fireSourceChanged(ISources.WORKBENCH, getCurrentState());

(which is to say return all the variable this provider sets) or you need to make "currentState" a member variable.

Hope that helps folks what come here after me! :-)

Thanks so much Prakash for such an elaborate and e...

2009-10-23T13:17:30.709+05:30

Thanks so much Prakash for such an elaborate and easy-to-understand write-up on this topic. It helped me a lot.
Thanks.

@Sergey Khorev, You can find it here: http://bl...

2009-10-11T22:14:54.567+05:30

@Sergey Khorev,
You can find it here: http://blog.eclipse-tips.com/2009/01/commands-part-2-selection-and.html

Hi, You are writing "See my earlier tip on C...

2009-10-11T20:43:14.683+05:30

Hi,

You are writing "See my earlier tip on Command Framework for more explanation on this priority attribute." Unfortunately I was not able to find the tip, can you direct me?
I am trying to create view-local variable using this attribute (trying to substitute activePartId value), is it possible?

@Edvin Syse, Thanks for the pointer. I'm l...

2009-07-20T10:04:14.002+05:30

@Edvin Syse,
Thanks for the pointer. I'm little over confident and many time I write code directly in the blogger. Sometimes these errors happen :-(

In the getCurrentState() method you have named bot...

2009-07-19T12:20:53.748+05:30

In the getCurrentState() method you have named both the Map and the String variable 'currentState' :)

I like your example but you cover Authetication on...

2009-03-23T17:14:00.000+05:30

I like your example but you cover Authetication only.
Often it is coupled with Authorization for particular functions as well, and the actions for functions not allowed should be hidden.
I did a similar thing for an Eclipse 3.2 based RCP application using an IActionFilter to hide the actions not allowed.

Yes, the extension point is from 3.4 only. You can...

2009-02-24T13:46:00.000+05:30

Yes, the extension point is from 3.4 only. You can add target Eclipse version.

Please send a mail to me (grprakash@gmail.com) after publishing the translated entries. I'll update the original blog entry, so that people who come to my blog know about the translation and visit your page.

Again, thanks for your time in translating this.

O.K. I'll start to translate your great entries.I ...

2009-02-24T13:39:00.000+05:30

O.K. I'll start to translate your great entries.I must to link your great entries.But I don't use your pictures, because I hope my page visitors to move to your blog my translated entries.If my visitors want to see the pictures, they move to your blog!

Come to think of it,The extension point "org.eclipse.ui.services" is new extension point.(since 3.4 Ganymede release).
I would like to write about target Eclipse version at your entry.How do you think about it?

@Hiroki Kondo(kompiro)
You don't have to ask...

2009-02-24T08:05:00.000+05:30

@Hiroki Kondo(kompiro)
You don't have to ask me everytime for translating :-) You can translate any of my posts, just remember to give a link back to the original post from the translated one.

Thanks!

WoW,This is a great series, too!Because I want to ...

2009-02-24T06:35:00.000+05:30

WoW,This is a great series, too!Because I want to do same things,"How do I implement login and logout menu?" This is very important things to develop Plug-ins. How do you find it?
And I would like to translate this series to Japanese.
Please allow me to translate your great article.