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org.osgi.framework.FrameworkUtil.getBundle(Class) method, where is it? [message #543858]

Wed, 30 June 2010 16:29

Eclipse User

Hey all,

I am trying to access my BundleContext so I can use a service outside my activator. I found that OSGI 4.2 has a method org.osgi.framework.FrameworkUtil.getBundle(Class), but I cannot use it in my project (method doesn't exist, won't compile). I am using Equinox 3.6 and this link, http://download.eclipse.org/eclipse/downloads/drops/R-3.5-20 0906111540/eclipse-news-part3.html, appears to say that it has been available since 3.5.2.

Can anybody help me figure out how to use this method? Other alternatives are welcome too. The only other option I've seen is to make a static reference to the BundleContext in the Activator, which seems kinda ugly Sad

Re: org.osgi.framework.FrameworkUtil.getBundle(Class) method, where is it? [message #543934 is a reply to message #543858]

Thu, 01 July 2010 03:11

Eclipse User

> The only other option I've seen is to make a static reference to the BundleContext in the Activator, which seems kinda ugly :(

It's not ugly but common practice to set/unset a static reference in
your activator when a bundle is started/stopped. This allows to keep
references to your BundleContext. You could also install service
trackers in your activator and inject those into a factory class of your
own if you. But that just encapsulates the statics into another class. ;)

FrameworkUtil#getBundle(Class) may have some disadvantages (performance,
security). However, in case you need it, simply add "org.osgi.framework"
as Import-Package in your manifest and you'll have it. It's there in
Equinox 3.6.

BTW, have you looked at DS? This might be an alternative if you don't
like dealing with an activator and static references.

-Gunnar

--
Gunnar Wagenknecht
gunnar@wagenknecht.org
http://wagenknecht.org/

Re: org.osgi.framework.FrameworkUtil.getBundle(Class) method, where is it? [message #546178 is a reply to message #543858]

Sun, 11 July 2010 22:13

Eclipse User

Gunnar's suggestion to consider using DS is spot on. If you're new to DS I would like to suggest my book, which has two chapters dedicated to it.

Good luck,

Simon

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