Hi OSGi Experts,
I have a question of Bundle.start(int) process.
[Condition]
BundleA:
Bundle.uninstall() for own bundle is called in BundleActiovator.start(context).
------------
public class Activator implements BundleActivator {
public void start(BundleContext context) throws Exception {
context.getBundle().uninstall();
}
...
}
-------------
# I know that this bundle has no meaning...
[Question]
When Bundle.start() for BundleA is called, how should
the framework handle it?
As far as I checked the core spec (R4.3), my understanding is as below.
---
0. The BundleA's state is INSTALLED.
1. BundleA.start() is called.
2. The state of BundleA is set to RESOLVED (and BundleEvent.RESOLVED
is fired).
# In this case, BundleA can be resolved.
3. The state of BundleA is set to STARTING (and BundleEvent.STARTING
is fired).
4. BundleA.uninstall() is called in BundleActiovator.start(context).
5. The framework tries to stop BundleA, but it fails (throws an
exception) because BundleA's state is kept STARTING.
6. The framework fires FrameworkEvent.ERROR, however it doesn't throw
BundleException.
7. The state of BundleA is set to UNINSTALLED (and BundleEvent.UNINSTALLED
is fired).
8. BundleA.uninstall() is returned.
9. BundleException is thrown because BundleA was uninstalled while
the BundleActivator.start() was running.
10.BundleA.start() fails.
---
In the above case, the BundleA's state is changed STARTING to
UNINSTALLED in process of BundleA.start().
However, OSGi core spec doesn't permit such status change
(4.4.2 Bundle State).
Best regards,
Shigekuni Kondo
_____________________________________________
Shigekuni Kondo
Promotion Project 1
NTT Cyber Solutions Laboratories
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
1-1 Hikarinooka Yokosuka
Kanagawa 239-0847 Japan
TEL:+81-46-859-3444
FAX:+81-46-855-1282
E-mail:[email protected]
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