Sameer Gupta created KARAF-6152:
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Summary: Provide Require Capability Between Composite Subsystem
and Bundle
Key: KARAF-6152
URL: https://issues.apache.org/jira/browse/KARAF-6152
Project: Karaf
Issue Type: Bug
Components: karaf
Reporter: Sameer Gupta
Attachments: messagedisplay.esa, msgdispconsumer.jar
1 - I have a composite subsystem which has a bundle with a provide
capability, the provide capability is mentioned in both the bundle manifest
which is inside the bundle manifest and the subsystem manifest as well.
2. I have a stand alone bundle which requires this capability and mentions
this in standalone bundle manifest.
In case of system migrations, if the Bundle gets deployed before the ESA
subsystem, the bundle does not start as expected and has to be manually
started once the provide capability is deployed.
However, if I mark the subsystem as feature, then, as soon as the subsystem
is deployed, the standalone bundle also goes to active state, the removing
need for manual intervention.
Provide Require capability does not seem to have the same effect for Composite
Subsystem as it has for feature subsystem.
Test Case 1: Deploy the Composite Subsystem i.e the attached messagedisplay.esa
file and the start it and then deploy the test bundle, the bundle auto-wires
and starts.
Test Case 2: Deploy the test bundle, try and start it, it fails stating a
required capability is missing, deploy the subsystem i.e. the
messagedisplay.esa file now, the Subsystem starts but does not auto wire and
start the test bundle, try and start the test bundle now and it works.
Test Case 3: Open the .ESA file in winrar like tool, change the subsytem type
from Subsystem-Type: osgi.subsystem.composite to Subsystem-Type:
osgi.subsystem.feature.
Deploy the test bundle, try and start it, it fails stating a required
capability is missing, deploy the subsystem i.e. the messagedisplay.esa file
now, the Subsystem starts and the test bundle also starts automatically.
Why does behavior in Test case 3 not work for test case 2 scenario, i.e.
autowiring happens for feature subsystem but not for composite subsystem.
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