Platform: Java 1.8, karaf 4.1.3
I have the following DS component that exposes a Servlet to the Pax Web
Whiteboard Extender:
https://github.com/steinarb/sonar-collector/blob/master/sonar-collector-webhook/src/main/java/no/priv/bang/sonar/collector/webhook/SonarCollectorServlet.java#L55
The component starts fine, and exposes a Servlet service that is picked
up by the whiteboard extender, and as far as I can tell, it does what it
is expected to do (receive POSTs from SonarQube/SonarCloud and store
build statistics in a PostgreSQL database).
However, if I add an empty activate method, like so:
@Component(service={Servlet.class}, property={"alias=/sonar-collector"} )
public class SonarCollectorServlet extends HttpServlet {
...
@Activate
public void activate(Map<String, Object> config) {
}
...
}
then the component fails to load, because of missing dependencies:
karaf@root()> feature:repo-add
mvn:no.priv.bang.sonar.sonar-collector/sonar-collector-webhook/LATEST/xml/features
Adding feature url
mvn:no.priv.bang.sonar.sonar-collector/sonar-collector-webhook/LATEST/xml/features
karaf@root()> feature:install sonar-collector-webhook
Error executing command: Unable to resolve root: missing requirement [root]
osgi.identity; osgi.identity=sonar-collector-webhook; type=karaf.feature;
version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]";
filter:="(&(osgi.identity=sonar-collector-webhook)(type=karaf.feature)(version>=1.0.0.SNAPSHOT)(version<=1.0.0.SNAPSHOT))"
[caused by: Unable to resolve sonar-collector-webhook/1.0.0.SNAPSHOT: missing
requirement [sonar-collector-webhook/1.0.0.SNAPSHOT] osgi.identity;
osgi.identity=no.priv.bang.sonar.sonar-collector-webhook; type=osgi.bundle;
version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; resolution:=mandatory [caused by:
Unable to resolve no.priv.bang.sonar.sonar-collector-webhook/1.0.0.SNAPSHOT:
missing requirement [no.priv.bang.sonar.sonar-collector-webhook/1.0.0.SNAPSHOT]
osgi.service; effective:=ac
tive; filter:="(objectClass=org.osgi.service.jdbc.DataSourceFactory)"]]
karaf@root()>
If remove the "@Activate" annotation, the component loads again.
Does anyone know what might cause this?
What's strange about this, that the missing depenency the error message
complains about, ie. org.osgi.service.jdbc.DataSourceFactory, is
essential to the servlet's operation. Without a DataSourceFactory, no
database can be contacted and no data can be saved (and data _is_ saved).
Is the error message because the bundle can't find the type
org.osgi.service.jdbc.DataSourceFactory? Or is the message about not
getting an instance of org.osgi.service.jdbc.DataSourceFactory?
The full error message from karaf.log below.
Thanks!
- Steinar
Error message from karaf.log follows:
2017-12-04T20:28:57,555 | ERROR | Karaf local console user karaf | ShellUtil
| 42 - org.apache.karaf.shell.core - 4.1.3 | Exception
caught while executing command
org.osgi.service.resolver.ResolutionException: Unable to resolve root: missing
requirement [root] osgi.identity; osgi.identity=sonar-collector-webhook;
type=karaf.feature; version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]";
filter:="(&(osgi.identity=sonar-collector-webhook)(type=karaf.feature)(version>=1.0.0.SNAPSHOT)(version<=1.0.0.SNAPSHOT))"
[caused by: Unable to resolve sonar-collector-webhook/1.0.0.SNAPSHOT: missing
requirement [sonar-collector-webhook/1.0.0.SNAPSHOT] osgi.identity;
osgi.identity=no.priv.bang.sonar.sonar-collector-webhook; type=osgi.bundle;
version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; resolution:=mandatory [caused by:
Unable to resolve no.priv.bang.sonar.sonar-collector-webhook/1.0.0.SNAPSHOT:
missing requirement [no.priv.bang.sonar.sonar-collector-webhook/1.0.0.SNAPSHOT]
osgi.s
ervice; effective:=active;
filter:="(objectClass=org.osgi.service.jdbc.DataSourceFactory)"]]
at
org.apache.felix.resolver.ResolutionError.toException(ResolutionError.java:42)
~[?:?]
at
org.apache.felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:391) ~[?:?]
at
org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:377) ~[?:?]
at
org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:349) ~[?:?]
at
org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:218)
~[?:?]
at
org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:291)
~[?:?]
at
org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1248)
~[?:?]
at
org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$1(FeaturesServiceImpl.java:1147)
~[?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:?]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
