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copied!<p>Your question is decidedly generic and it is not possible to provide a detailed answer in a reasonable space and time. I will try to cover some ideas and suggestions though.</p> <ol> <li><p>Updating distinct bundles on distinct clients is a non-issue. From the programmatic viewpoint, you have many choices (I would rather suggest you read <a href="http://rads.stackoverflow.com/amzn/click/1933988916" rel="nofollow">OSGi in Action</a> for a tour of the facilities that OSGi frameworks adhering to the specification provide). I don't know if you intend to use Remote OSGI (as of Chapter 13 of the <a href="http://www.osgi.org/download/r4v42/r4.enterprise.pdf" rel="nofollow">Enterprise specification</a>). Clearly, you want your client-server API bundles/services to be preserved. Other than that, an OSGi bundle can pick a bundle/service from whoever exposes it (more on that in OSGi in Action, again). Provisioning is another aspect: that depends on who (client or server) controls updating; on the simplest case, you just juggle bundles around manually and install/start/stop/uninstall them from the framework console.</p></li> <li><p>Unless I am missing something from your description, you cannot choose this path since you cannot have a bundle of bundles. This concept simply does not exist in the bare OSGi specification. The bundle hierarchy is perfectly flat, therefore you cannot perform "physical hiding". To instead <em>logically</em> hide bundles behind other bundles, you must operate on the services they expose, but the burden is completely on you. You could do the same through packages, but I would not recommend that. That being said, I am not perfectly up-to-date with bleeding-edge Service Component Architecture (SCA) implementations such as <a href="http://tuscany.apache.org/" rel="nofollow">Tuscany</a> release 2. That one <strong>could</strong> give you a hand since it promised to be OSGi aware. The <a href="http://rads.stackoverflow.com/amzn/click/1933988894" rel="nofollow">Tuscany SCA in Action</a> book, while recent, covers release 1 only. A worthy read, but probably not what you are looking for. Wrapping up, you cannot <em>monolithically</em> update an OSGI application in the strict sense: you would have to specify each bundle to be updated. This must be seen as an advantage: you have more control on your application. The downside is clearly on the effort of managing the update at such finer granularity.</p></li> </ol> <p>I hope this simplified discussion was of use to you.</p>

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