I've been writing an introduction to OSGi dependencies for my project. It is aimed at people of all levels who have never worked with OSGi, but parts of it may be helpful. https://docs.google.com/document/d/1iTlrOjwU1lcY7jM6HjkfXP3dOhir5ep-nliMO9K75rw/edit?hl=en_US
On Tue, Aug 16, 2011 at 4:46 AM, Per-Erik Svensson < [email protected]> wrote: > So, if the only things in the system are > > osgi framework (felix) > fileinstall > some code bundle (spring bundle) > a bundle with an xml file only > > And the xml-bundle imports packages that the spring-bundle exports, than > updating and refreshing the spring-bundle should cause the xml-bundle to be > "reloaded". However, if the xml-bundle does not contain code, why is it > important that it gets it's package dependencies rewired? It will not load > any classes anyway (and shouldn't have any package imports because it needs > no packages)? I must be missing something of your problem. :) > > If the xml-bundle however does contain code (and needs to load classes), > are > you sure that the only one exporting the packages of those classes is the > spring-bundle. One possiblity is that you have other bundles in the system > that export the same packages and that you're getting wired to those > packages instead. > > "It didn't pick up the new version of the classes until I deleted the > Spring > file[...]" > 1. What is "it"? Which bundle are you expecting to see the changes from? If > it's the xml-bundle, have you confirmed that it's manifest.mf-file states > that it needs at least one package that ONLY the spring-bundle can give. > 2. There is no way to unload classes, so if "it" has already loaded the > classes it is using, it doesn't matter that you update the origin of those > classes. You also need a refresh which will rewire the package > dependencies, > restart the dependent bundles, and reload the classes. > 3. Have you made sure that the framework actually gets an update request on > the spring bundle? Fileinstall only has the info supplied by the OS > (file-size, file creation date and so on) to go on, and might determine > that > spring-bundleA and spring-bundleB are the same thing (no change, no > update). > > Finally, trying this in gogo shell might help you see what is wired to what > and when updates actually happen! > > Regards, > Per-Erik Svensson > > > On Tue, Aug 16, 2011 at 7:08 AM, Jim Talbut <[email protected]> > wrote: > > > I've tried using refresh now (sorry it takes so long to get things done > > around here) and it made no difference. > > It didn't pick up the new version of the classes until I deleted the > Spring > > file, waited for fileinstall to pick that up and remove the bundle, > copied > > the file over again and waited for fileinstall to pick that up. > > Note that this is using a 1.0-SNAPSHOT version of the classes so there is > > no version number change, if that affects things. > > > > Jim > > > > -----Original Message----- > > From: Jim Talbut [mailto:[email protected]] > > Sent: 12 August 2011 17:32 > > To: [email protected] > > Subject: RE: Help understanding OSGi class loading > > > > No I didn't. > > How does that work with existing instantiated objects? > > > > Thanks > > > > Jim > > > > -----Original Message----- > > From: Richard S. Hall [mailto:[email protected]] > > Sent: 12 August 2011 14:44 > > To: [email protected] > > Subject: Re: Help understanding OSGi class loading > > > > Did you refresh after doing the update? > > > > On 8/12/11 4:03 AM, Jim Talbut wrote: > > > Hi, > > > > > > I've just been surprised by the behaviour of karaf/felix and I'd be > > grateful for some help understanding how this works. > > > > > > My code is split into two chunks: > > > > > > 1. A compiled bundle. > > > > > > 2. A Spring XML file. > > > My intention is that the Spring file contains all the configuration > > relating to the piece of work, whilst the bundle contains the (more > static) > > compiled code - with the intention of being able to update/replace the > > Spring file whenever I want. > > > > > > I just found an error in the bundle and uninstalled it, but the bundle > > created for the Spring file is still running. > > > > > > Does this mean that only OSGi services are dynamically removed, and if > > the Spring file directly references exported classes from a bundle then > the > > classes are only resolved via OSGi when they are loaded? > > > In which case will restarting the Spring bundle clear it out adequately > > to ensure that it picks up a new compiled bundle? > > > > > > Thanks > > > > > > Jim > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > -- Matt Stevenson.
