| Re: [concierge-dev] Fragment Bundle Classpath |
A host and a fragment conflict when they cannot resolve to provide a consistent class space. If a conflict is found, the Fragment bundle is not attached to the host bundle.
Hi all,I run the test again, and Concierge will complain with:[Sat Nov 01 12:15:49 CET 2014] [ERROR] Unsuccessfully attempted to attach JarBundleResource {storage/default/3/bundle0 of bundle [log4j.apache-log4j-extras-1.1.0]} to JarBundleResource {storage/default/2/bundle0 of bundle [log4j-1.2.17]}
Exception: Conflicting import statement null from BundleRequirement{Import-Package javax.xml.parsers}
[Sat Nov 01 12:15:49 CET 2014] [DEBUG] Solution: MultiMap {JarBundleResource {storage/default/2/bundle0 of bundle [log4j-1.2.17]}=[{BundleRequirement{Import-Package javax.jmdns;resolution:=optional}->Export-Package javax.jmdns}, {BundleRequirement{Import-Package javax.management}->Export-Package javax.management}, {BundleRequirement{Import-Package javax.naming}->Export-Package javax.naming}, {BundleRequirement{Import-Package javax.xml.parsers}->Export-Package javax.xml.parsers}, {BundleRequirement{Import-Package org.w3c.dom}->Export-Package org.w3c.dom}, {BundleRequirement{Import-Package org.xml.sax}->Export-Package org.xml.sax}, {BundleRequirement{Import-Package org.xml.sax.helpers}->Export-Package org.xml.sax.helpers}], Concierge System Bundle=[{BundleRequirement{Import-Package javax.jmdns;resolution:=optional}->Export-Package javax.jmdns}, {BundleRequirement{Import-Package javax.management}->Export-Package javax.management}, {BundleRequirement{Import-Package javax.naming}->Export-Package javax.naming}, {BundleRequirement{Import-Package javax.xml.parsers}->Export-Package javax.xml.parsers}, {BundleRequirement{Import-Package org.w3c.dom}->Export-Package org.w3c.dom}, {BundleRequirement{Import-Package org.xml.sax}->Export-Package org.xml.sax}, {BundleRequirement{Import-Package org.xml.sax.helpers}->Export-Package org.xml.sax.helpers}]}
[Sat Nov 01 12:15:49 CET 2014] [INFO] framework: Bundle [log4j-1.2.17] started.
AFAI understand the problem is in BundleImpl.attachFragment(), which calls checkConflicts(): this will report an import statement conflict. See BundleImpl lines 2292ff
The host and fragment bundles manifest' are as:
host (log4j_1.2.17.jar)
Import-Package: javax.jmdns;resolution:=optional,
javax.jms;resolution:=optional,
javax.mail;resolution:=optional,
javax.mail.internet;resolution:=optional,
javax.management,javax.naming,
javax.xml.parsers,org.w3c.dom,org.xml.sax,org.xml.sax.helpersfragment (log4j.apache-log4j-extras_1.1.0.jar)
Import-Package: javax.xml.parsers,javax.xml.transform,javax.xml.transform.dom,
javax.xml.transform.sax,javax.xml.transform.stream,org.apache.log4j.config,
org.apache.log4j.extras;version="1.1",org.apache.log4j.filter;version="1.1",
org.apache.log4j.or,org.apache.log4j.rolling;version="1.1",
org.apache.log4j.rule;version="1.1",org.w3c.dom,org.xml.sax,org.xml.sax.helpersFrom what I see this should be OK as both imports will not use different version (unspecified). Maybe the conflict check has not only to consider the packages, but also its versions?
Just as side note: the package javax.xml.parsers will be taken from org.osgi.framework.system.packages.extra framework property. I think that should be not related to this issue, but just to state on that.
@Jan/Tim: is my assumption correct?
Bye, Jochen
On Sat, Nov 1, 2014 at 11:52 AM, Jochen Hiller <jo.hiller@xxxxxxxxxxxxxx> wrote:Hi Tim, Dave,I yet have a test case for that which worked well some weeks ago.See https://github.com/JochenHiller/concierge-tests/blob/master/test/org/eclipse/concierge/test/integration/EclipseKuraTest.java, test01InstallAndStartLog4j
I just ran the test and indeed, it does fail now again, the fragment will not be resolved.I will investigate into that.Thanks for pointing us to the issue.JochenOn Sat, Nov 1, 2014 at 11:19 AM, Tim Verbelen <tim.verbelen@xxxxxxxxxxxxxx> wrote:Hi Dave,
Eclipse Kura is now running well in Concierge.That's great news!
One item I can’t seem to resolve is logging. We use log4j and apache-log4j-extras to provide rolling log support. The apache-log4j-extras bundle attaches as a fragment to the log4j bundle. I can use packages exported by the host bundles with no problem, but when I attempt to use packages exported by the fragment bundle I get ClassNotFoundException. I included the error log below. My understanding is that when a fragment bundle attaches to the host, it extends the host’s classpath. I am happy to send a simple test case, bundles, manifest files, or whatever would be helpful.I'll look into it. A simple test case would help a lot.
Cheers,
Tim
--
Tim Verbelen
Department of Information Technology
Broadband Communication Networks (IBCN)
Ghent University - iMinds
Gaston Crommenlaan 8 (Bus 201), B-9050 Gent, Belgium
T: +32 9 33 14940 ; T Secr: +32 9 33 14900
F: +32 9 33 14899
E: tim.verbelen@xxxxxxxxxxxxxx
W : www.ibcn.intec.UGent.be
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