Ashish Chopra created FELIX-6090:
------------------------------------
Summary: No way to provide non-override-able instructions to
maven-bundle-plugin
Key: FELIX-6090
URL: https://issues.apache.org/jira/browse/FELIX-6090
Project: Felix
Issue Type: Improvement
Components: Maven Bundle Plugin
Affects Versions: maven-bundle-plugin-4.1.0
Reporter: Ashish Chopra
Since the resolution of FELIX-4596, support for appending or prepending the
Manifest Headers via bundle-plugin's build instructions exist. maven-scr-plugin
leverages that and via FELIX-4595 it now has the support to append the
{{Service-Component}} header.
However, this takes away the functionality to provide a Header _entirelly_ via
the build-instructions for the project POM. Notably for {{Service-Component}}
header, this becomes important when the OSGi bundle created by the project's
POM has to serve as a host-bundle of one or more OSGi fragment-bundles.
If the fragment bundles have their own OSGi components, one way to activate
them is via [0] (as discussed at [1] [2]). But due to "append" nature of
entries generated by maven-scr-plugin, the final {{Service-Component}} header
in the MANIFEST looks like [3], which causes Felix SCR to attempt the
activation of the OSGi component twice. This causes a (benign) {{ERROR}}
log-line to appear [4].
I tried going through the changelogs of maven-bundle-plugin and
maven-scr-plugin, but couldn't find any further development on this topic.
Raising this JIRA to review the addition of such a capability (maybe enhance
maven-bundle-plugin instructions to optionally ignore requests to update
headers)
[0]
{noformat}
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Service-Component>
OSGI-INF/*.xml
</Service-Component>
</instructions>
</configuration>
</plugin>
{noformat}
[1] http://apache-felix.18485.x6.nabble.com/DS-amp-fragments-td5004610.html
[2] https://stackoverflow.com/a/42062399
[3]
{noformat}
Service-Component:
OSGI-INF/*.xml,OSGI-INF/com.example.my.package1.Service1.xml,OSGI-INF/com.example.my.package1.Service2.xml,OSGI-INF/com.example.my.package2.Service.xml
{noformat}
[4]
{noformat}
*ERROR* [FelixStartLevel] com.example.my-bundle bundle
com.example.my-bundle:1.0.1.SNAPSHOT (331)[com.example.my.package1.Service1] :
Cannot register component (org.osgi.service.component.ComponentException: The
component name 'com.example.my.package1.Service1' has already been registered
by Bundle 331 (com.example.my-bundle) as Component of Class
com.example.my.package1.Service1)
org.osgi.service.component.ComponentException: The component name
'com.example.my.package1.Service1' has already been registered by Bundle 331
(com.example.my-bundle) as Component of Class com.example.my.package1.Service1
at
org.apache.felix.scr.impl.ComponentRegistry.checkComponentName(ComponentRegistry.java:239)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.BundleComponentActivator.loadDescriptor(BundleComponentActivator.java:442)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:314)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:269)
[org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:380)
[org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:49)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:264)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169)
[org.apache.felix.scr:2.1.16]
at
org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49)
[org.apache.felix.scr:2.1.16]
at
org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:488)
at
org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:420)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)
at
org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:450)
at
org.apache.felix.framework.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:915)
at
org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:834)
at
org.apache.felix.framework.EventDispatcher.fireBundleEvent(EventDispatcher.java:516)
at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4817)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2336)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1539)
at
org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
at java.lang.Thread.run(Thread.java:748)
{noformat}
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