Ah, okay, I assume it is caused by the missing Provide-Capability of the Equinox bundle that it provides that service. Could this information be added by some configuration file without modify the Equinox bundle itself?
2017-02-05 11:49 GMT+01:00 Markus Rathgeb <maggu2...@gmail.com>: > Hello, > > I thought I understand how the dependency flag is working for features > and bundles, but at least it seems to be different. > Perhaps someone could explain me the following scenario: > > Feature file: > === > <?xml version="1.0" encoding="UTF-8"?> > <features name="saxparserfactory" > xmlns="http://karaf.apache.org/xmlns/features/v1.4.0";> > > <feature name="saxparserfactory" version="1.0-SNAPSHOT"> > > <requirement>osgi.service;filter:="(objectClass=javax.xml.parsers.SAXParserFactory)";effective:=active</requirement> > <feature dependency="true">jboss-xerces</feature> > </feature> > > <feature name="jboss-xerces" description="JBoss Xerces" > version="1.0-SNAPSHOT"> > <details>OSGi service for 'javax.xml.parsers.SAXParserFactory'</details> > > <!-- Maven repository: > https://repository.jboss.org/nexus/content/repositories/releases/ --> > <!-- <bundle > start-level="30">mvn:org.jboss.osgi.xerces/jbosgi-xerces/3.1.0.Final</bundle> > --> > <bundle > start-level="30">https://repository.jboss.org/nexus/content/repositories/releases/org/jboss/osgi/xerces/jbosgi-xerces/3.1.0.Final/jbosgi-xerces-3.1.0.Final.jar</bundle> > > <capability>osgi.service;objectClass=javax.xml.parsers.SAXParserFactory</capability> > > <bundle dependency="true" > start-level="30">mvn:org.osgi/org.osgi.util.xml/1.0.1</bundle> > <bundle dependency="true" > start-level="8">mvn:org.ops4j.pax.logging/pax-logging-api/1.9.1</bundle> > </feature> > > </features> > === > > I would expect if I install the feature "saxparserfactory" the feature > jboss-xerces is installed only if the requirements are not already > fulfilled. > The only requirement the feature drops in should be to ensure that > there is a SAXParserFactory service available. > Should this be possible? > > > Test > === > > I used the current Karaf 4.1.0 form the second voting round. > > Start a clean instance: > $ bin/karaf clean > > As expected Apache Felix is the used OSGi framework > > karaf@root()> bundle:list -t 0 -s 0 | grep Active > 0 │ Active │ 0 │ 5.6.1 │ org.apache.felix.framework > > I added the feature repository file. > > karaf@root()> feature:repo-add > file:///home/maggu2810/tmp/saxparserfactory-feature.xml > Adding feature url file:///home/maggu2810/tmp/saxparserfactory-feature.xml > > After that let's look if there is already a SAXParserFactory present: > > karaf@root()> service:list javax.xml.parsers.SAXParserFactory > > No output, so as expected, no service found. > > Check what will be done if the feature is installed: > > karaf@root()> feature:install -t -v saxparserfactory > Adding features: saxparserfactory/[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT] > Changes to perform: > Region: root > Bundles to install: > > https://repository.jboss.org/nexus/content/repositories/releases/org/jboss/osgi/xerces/jbosgi-xerces/3.1.0.Final/jbosgi-xerces-3.1.0.Final.jar > mvn:org.osgi/org.osgi.util.xml/1.0.1 > > This is as I expect what should be done. > > Let's exit the Karaf container. > > karaf@root()> shutdown -f > > > > After that I used the Equinox framework > > $ echo 'karaf.framework=equinox' >> etc/custom.properties > > and started again a clean isntance. > > $ bin/karaf clean > > Ensure the feature repository is available: > > karaf@root()> feature:repo-add > file:///home/maggu2810/tmp/saxparserfactory-feature.xml > Adding feature url file:///home/maggu2810/tmp/saxparserfactory-feature.xml > > The Equinox OSGi framework bundle already provides a SAXParserFactory service. > > karaf@root()> service:list javax.xml.parsers.SAXParserFactory > [javax.xml.parsers.SAXParserFactory] > ------------------------------------ > service.pid = 0.org.eclipse.osgi.internal.framework.XMLParsingServiceFactory > service.vendor = Eclipse.org - Equinox > service.id = 20 > service.bundleid = 0 > service.scope = bundle > Provided by : > OSGi System Bundle (0) > > Now I would expect that the installation of the saxparserfactory > feature will not trigger an installation of the jboss-xerces feature, > because all requirements should be already satisfied. > But it looks like: > > karaf@root()> feature:install -t -v saxparserfactory > Adding features: saxparserfactory/[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT] > Changes to perform: > Region: root > Bundles to install: > > https://repository.jboss.org/nexus/content/repositories/releases/org/jboss/osgi/xerces/jbosgi-xerces/3.1.0.Final/jbosgi-xerces-3.1.0.Final.jar > mvn:org.osgi/org.osgi.util.xml/1.0.1 > > What am I doing wrong? > > Best regards, > Markus Rathgeb
