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Feb 7, 2009 11:08pm
Img_missing_medium sgargan 8 posts


Hopefully someone can set me straight here. I’m having real trouble resolving the IModuleDisplay service in my GUI app. I did have this working, but must have changed something since now no display application I try manages to resolve the service. I did upgrade the SDK recently, but was pretty sure it was working after that.

The emulator starts without error and I can see the LCD service in the services listing, but no IModuleDisplay service is registered.

Anyone have an idea what might be going on here?

thanks kindly,


(: services
Svc IdObject Class_Other Properties__
1 org.osgi.service.startlevel.StartLevel
2 org.osgi.service.log.LogService
3 org.osgi.service.cm.ConfigurationAdmin service.vendor = Bug Labs Inc., service.pid = com.buglabs.osgi.cm.impl.ConfigurationAdminImplservice.description = Configuration Admin Service Specification 1.2 Implementation,
21 com.buglabs.menu.IMenuProvider
24 com.buglabs.status.IStatusBarProvider
4 org.osgi.service.obr.RepositoryAdmin Provider = com.buglabs.osgi.obr,
22 com.buglabs.services.ws.PublicWSAdmin
23 com.buglabs.bug.program.pub.IUserAppManager
5 org.osgi.service.http.HttpService openPort = 8082, port = 8082
6 ch.ethz.iks.slp.Advertiser
7 ch.ethz.iks.slp.Locator
8 com.buglabs.bug.base.pub.ITimeProvider
9 com.buglabs.bug.base.pub.IToneGenerator
19 com.buglabs.device.IButtonEventProvider ButtonsProvided = Base, ButtonEventProvider = com.buglabs.bug.emulator.awt.VirtualBugFrameEmuluated = true,
20 com.buglabs.device.IBaseDisplay DisplayProvider = com.buglabs.bug.emulator.awt.VirtualBugFrameEmuluated = true,
25 com.buglabs.bug.base.pub.IBUGBaseControl
10 com.buglabs.bug.module.pub.IModletFactory Module = GPS, Modlet Provider = com.buglabs.bug.emulator.module.gps
11 com.buglabs.bug.module.pub.IModletFactory Module = VONHIPPEL, Modlet Provider = com.buglabs.bug.emulator.module.vonhippel
26 com.buglabs.bug.module.pub.IModletFactory Module = LCD, Modlet Provider = com.buglabs.bug.emulator.module.lcd
13 com.buglabs.bug.module.pub.IModletFactory Module = MOTION, Modlet Provider = com.buglabs.bug.emulator.module.motion
14 com.buglabs.bug.module.pub.IModletFactory Module = CAMERA, Modlet Provider = com.buglabs.bug.emulator.module.camera
15 org.osgi.service.log.LogService Module = CAMERA, Modlet Provider = com.buglabs.bug.emulator.module.camera
16 com.buglabs.osgi.shell.IShellCommandProvider
17 com.buglabs.osgi.shell.pub.IShellCommandExecutor
18 com.buglabs.osgi.shell.IShellCommandProvider

Feb 9, 2009 2:11pm
Medium Bug Labs team bballantine 56 posts


That’s really strange. Unfortunately, I have no idea what’s going on. Can you provide me with some more info and maybe I can help track it down? Here’s a list of some info that would help:

1. What platform (Mac, Linux, PC) are you on?

2. SDK Version – go to "About Eclipse SDK" under "Eclipse" on Mac, or "About Eclipse Platform" under "Help" on Linux/PC. Then click on the Dragonfly icon. I’m looking for the string in the "Version" column.

3. Is there anything in the PDE error log? – "Window" > "Show View" > "Other" > "PDE Runtime" > "Error Log" to show the view. There may be a lot in there, so clear it out before running your test. See if there’s something that happens when you connect the LCD module or if anything that seems related appears. Post any error messages here.

4. Can you post the entire console output? I would start by removing all modules and closing the Virtual BUG. Then restart the Virtual BUG. Once it’s started, add the LCD module. Then give me the entire output console output.

5. Lastly, what applications are you trying, specifically? This’ll help me mimic your tests.

All that info will help me figure out what’s going on. Thanks.

Feb 9, 2009 11:49pm
Img_missing_medium sgargan 8 posts


It took a reinstall, but its working again. It was the weirdest thing. For reference, in case anyone comes up against this again

I’m running Linux (Ubuntu with a 2.6.27-11 kernel)

Eclipse: Version: 3.4.1 Build id: M20080911-1700


There was nothing to speak of in the error log.

In my hunt for the problem I noticed that the when canStart is called on the AbstractService tracker it checks a map to see what services haven’t been resolved yet. It does this silently, so its hard to tell what services are missing and blocking your app running.

I’ve created a patch to add a method to display the blocking services. You could call it in your tracker if super.canStart() fails.

I can’t attach so I’ll just post it here.

Thanks for your help!



  1. Eclipse Workspace Patch 1.0 #P com.buglabs.common
    Index: .classpath

    .classpath (revision 8131)
    + .classpath (working copy)
    @ -3,6 +3,6 @ <classpathentry kind="src" path=""/> <classpathentry kind="con" path="com.buglabs.osgi.concierge.jdt.ConciergeClasspathContainerInitializer"/> <classpathentry kind="con" path="com.buglabs.osgi.concierge.jdt.OSGiBundleClassPathContainerInitializer"/>
    - <classpathentry kind="con" path="org.eclipse.jdt.USER_LIBRARY/phoneME Advanced Personal"/>
    + <classpathentry kind="con" path="com.buglabs.phoneme.personal.PhoneMEClasspathContainer"/> <classpathentry kind="output" path=""/>
    Index: com/buglabs/application/AbstractServiceTracker.java

    com/buglabs/application/AbstractServiceTracker.java (revision 8131)
    + com/buglabs/application/AbstractServiceTracker.java (working copy)
    @ -184,6 +184,23 @
return true;

gets a list of unresolved services blocking the app from starting

@return a list of services that
public List getServicesBlockingStart()
List blockingServices = new ArrayList();
for (Iterator x = services.iterator(); x.hasNext();) {
String serviceName = (String) x.next();
if (servicesMap.get(serviceName) == null) {
return blockingServices;
+ }
         * Helper method to retrieve a service of type class.
Feb 10, 2009 6:33pm
Medium Bug Labs team bballantine 56 posts


Glad you got it working. I’ll check out your patch soon as well… might be a good idea to log blocking services.

BTW, there’s a new SDK coming out pretty soon.

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