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Custom TrustEngine with Equinox servlet bridge [message #1014443] Mon, 25 February 2013 20:55 Go to next message
Michael Yara is currently offline Michael YaraFriend
Messages: 27
Registered: July 2009
Junior Member

I am creating an application that contains an embedded Jetty web server that launches several instances of the OSGI Equinox servlet bridge. I want to take advantage of the bundle security mechanism available in Equinox via a custom TrustEngine implementation. I have the following set in my config.ini for each of the equinox instances., osgi.signedcontent.authorization.engine.policy=trusted and The name of my implementing TrustEngine class is "BundleTrustEngine". My question is where should the BundleTrustEngine class sit in my application so that the OSGI Equinox servlet bridge can have access to it or how do I expose this implementation to the OSGI Equinox servlet bridge instances?

Thank you,
Re: Custom TrustEngine with Equinox servlet bridge [message #1014506 is a reply to message #1014443] Tue, 26 February 2013 00:13 Go to previous message
Michael Yara is currently offline Michael YaraFriend
Messages: 27
Registered: July 2009
Junior Member
I was able to answer my own question with some research and trial and error.

Here is the solution:

First you want to implement a Framework adapter hook. I followed the Hello Adaptor Hook example in the following pdf

In the adaptor package that you created add your implementation of TrustEngine. Mine was called BundleTrustEngine.

Next fill out the frameworkStart() method in your AdaptorHook class with the following in order to register your TrustEngine:

Hashtable<String, Object> properties = new Hashtable<String, Object>();
properties.put(Constants.SERVICE_RANKING, new Integer(Integer.MAX_VALUE));        
properties.put(SignedContentConstants.TRUST_ENGINE, "BundleTrustEngine"); 
context.registerService(TrustEngine.class.getName(), new BundleTrustEngine(), properties);

Replace "BundleTrustEngine" with the name of your TrustEngine implementation class.

Next set the following as runtime properties of the application using -D or specify them in your config.ini file.


The osgi.framework.extensions should be set to the name of the bundle that houses your Adaptor hook.

You may also want to look at the following articles on how to properly deploy your adaptor hook:

I have not got to the part where I have included this in my embedded application but I am guessing that you simply have to export your adaptor hook bundle fragment jar and included it in the WebContent/WEB-INF/eclipse/plugins directory of the equinox servlet bridge war and repackage the war file.

[Updated on: Tue, 26 February 2013 00:16]

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