Daniel Fagerstrom wrote:
Niclas Hedhman wrote:
On Wednesday 17 August 2005 22:09, Daniel Fagerstrom wrote:
And BTW, unless I missed something I haven't seen an explicit
reference to the "bundle:" protocol in the OSGi specs, at least in R3.
Didn't found it either, maybe it is Knopflerfish specific. But even
if it is, the OSGi api have no direct ways for accessing a resource
from any bundle, you must specify from what bundle you want to read
a resource. Maybe there is a way to do it in some more indirect way.
It is probably a protocol available to be 'installed' at your own
leisure (i.e. the core beauty of OSGi). I have not bothered with it.
Don't know, but I would assume that all OSGi implementation would need
something like the bundle: protocol (although the name and syntax
might not be standardized). Say that you have two bundles A and B that
both contain the resource "foo.xml". If you use "URL
getResource(String)" at the Bundle object of the A bundle the
resulting URL must contain a reference to the A bundle to not confuse
it with "foo.xml" from the B bundle.
Sure, but that's for the Bundle.getResource() method. What we're talking
about here is ClassLoader.getResource() which follows a different
resolution scheme and returns an URL that is resolved through the
bundle's classpath and points to the actual resource in a jar file or
class directory in the target bundle, e.g.
"jar://file://path/to/bundle-repo/foo-bundle/lib.jar!/path/to/resource".
I think quite a fair bit in Cocoon should use URLs and custom
protocols, and implement those through the OSGi URL service mechanism.
Yes, that would remove the need to depend on the Source interface in
blocks and make it possible to use external libraries that requires
java.net.URL.
Yup. Being able to use the standard java.net.URL class instead of the
SourceResolver will be a very nice thing. The only problem is the
infiamous SourceResolver.resolve() that has no equivalent on
URLConnection and which is needed for only one protocol, but an
important one which is "cocoon:"...
Sylvain
--
Sylvain Wallez Anyware Technologies
http://people.apache.org/~sylvain http://www.anyware-tech.com
Apache Software Foundation Member Research & Technology Director
