Malte Burkert created FELIX-4575:
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Summary: Unexpected behavior using proxies in declarative services
Key: FELIX-4575
URL: https://issues.apache.org/jira/browse/FELIX-4575
Project: Felix
Issue Type: Bug
Components: Declarative Services (SCR)
Environment: Operating System: Windows 8
Software platform: Java 1.7.0_45 with
- org.eclipse.osgi (3.9.1.v20140110-1610)
- org.apache.felix.scr (1.8.2)
Reporter: Malte Burkert
I have created the following setup which always shows the wrong and unexpected
behavior, which I describe after the setup.
===Setup===
.Hook-Bundle consisting of:
- Hook implementing EventListenerHook and FindHook
> overridden event(event, listeners): creates new proxy instance with
> InvocationHandlerProxy and registers the service (only services with a
> MANAGED property become proxied)
> overridden find(bundleContext, name, filter, allServices, references):
> removes non-proxied services with a MANAGED property from references
- InvocationHandlerProxy implementing InvocationHandler
> overriden invoke(proxy, method, args): logging invocation to system.out and
> invokes the passed method on the passed service
.Dateservice-Bundle
registers Service which returns current date; has component property MANAGED
defined in the related component description
.Multiplyservice-Bundle
returns the product of the numbers; has component property MANAGED defined in
the related component description
.Test-Bundle consisting of:
- Test implementing CommandProvider
> _test(commandInterpreter): gives an command line interface for executing the
> test by using the command "test"; test consists of calling the Dateservice
> and Multiplyservice and prints the results with the callee's classes (to
> check if proxy is called or not)
> setter for Dateservice and Multiplyservice, which get called as soon as
> service references are fulfilled (both are described as static 1..1 service
> references by the component description)
> unsetter for Dateservice and Multiplyservice, which get called as soon as at
> least on of the service references is not fulfilled any more
===Test Scenarios showing the unexpected behavior===
-Test-Scenario 1:
1. Start Hook-Bundle
2. Start Test-Bundle
3. Start Multiplyservice-Bundle
4. Start Dateservice-Bundle
5. Execute "test"
>Expected result: Dateservice and Multiplyservice become proxied, test calls
>methods on proxies
>Observed result: Both proxies are created, but only the Dateservice-Proxy is
>passed to the corresponding setter in the Test-class; test calls method on
>Dateservice's Proxy and Multiplyservice
-Test-Scenario 2:
1. Start Hook-Bundle
2. Start Test-Bundle
3. Start Dateservice-Bundle
4. Start Multiplyservice-Bundle
5. Execute "test"
>Expected result: Dateservice and Multiplyservice become proxied, test calls
>methods on proxies
>Observed result: Both proxies are created, but only the Multiplyservice-Proxy
>is passed to the corresponding setter in the Test-class; test calls method on
>Multiplyservice's Proxy and Dateservice
-Test-Scenario 3:
1. Start Hook-Bundle
2. Start Dateservice-Bundle
3. Start Multiplyservice-Bundle
4. Start Test-Bundle
5. Execute "test"
6. Stop Multiplyservice-Bundle
7. Start Multiplyservice-Bundle
8. Execute "test"
9. Stop Dateservice-Bundle
10. Start Dateservice-Bundle
11. Execute "test"
12. Stop Multiplyservice-Bundle
13. Start Multiplyservice-Bundle
14. Execute "test"
15. Stop Test-Bundle
16. Start Test-Bundle
17. Execute "test"
>Expected result: whenever Dateservice-, Multiplyservice- or Test-Bundle are
>started executing test should make calls on the Proxies of Dateservice and
>Multiplyservice
>Observed results in executing test in step:
5: everything as expected
8. everything as expected
11. only proxy for Dateservice called
14. only proxy for Multiplyservice called
17. everything as expected
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