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Service still used after stopping / uninstalling the service (ServiceTrackerCustomizer) [message #121874]

Thu, 27 November 2008 21:49

Lars Vogel

Messages: 1098
Registered: July 2009

Senior Member

Hi,

I have created a simple service example with the usage of a
servicetracker. The service provides "famous" quotes and my service
consumer should use a service tracker to trace this service.

Once the service gets activated the consumer starts a thread (as a
static inner class) which polls the service every 5 seconds for a quote.

What surprises my that if I remove the service the thread still
continues to run successfully. Even if I remove the consumer the thread
happily continous to write quotes to the console.

Any idea what might be the problem?

My assumption would have been that after I stop / uninstalled the
service it would not be possible to call it anymore or that I would
receive an error message.

The example is in detail described here:
http://www.vogella.de/articles/OSGi/article.html#osgiservice

Or for a screenshot with the strange behaviour please see at the end of
this chapter (console screenshot):
http://www.vogella.de/articles/OSGi/article.html#osgiservice _servicetracker

Best regards, Lars

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Re: Service still used after stopping / uninstalling the service (ServiceTrackerCustomizer) [message #122081 is a reply to message #121874]

Mon, 01 December 2008 19:15

Lars Vogel

Messages: 1098
Registered: July 2009

Senior Member

I issued a bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=257120
> Hi,
>
> I have created a simple service example with the usage of a
> servicetracker. The service provides "famous" quotes and my service
> consumer should use a service tracker to trace this service.
>
> Once the service gets activated the consumer starts a thread (as a
> static inner class) which polls the service every 5 seconds for a quote.
>
> What surprises my that if I remove the service the thread still
> continues to run successfully. Even if I remove the consumer the thread
> happily continous to write quotes to the console.
>
> Any idea what might be the problem?
>
> My assumption would have been that after I stop / uninstalled the
> service it would not be possible to call it anymore or that I would
> receive an error message.
>
> The example is in detail described here:
> http://www.vogella.de/articles/OSGi/article.html#osgiservice
>
> Or for a screenshot with the strange behaviour please see at the end of
> this chapter (console screenshot):
> http://www.vogella.de/articles/OSGi/article.html#osgiservice _servicetracker
>
> Best regards, Lars
>

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