DependencyManager does not correctly handle service counting
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Key: FELIX-425
URL: https://issues.apache.org/jira/browse/FELIX-425
Project: Felix
Issue Type: Bug
Components: Declarative Services
Reporter: Felix Meschberger
Assignee: Felix Meschberger
Whenever a referenced service is added to or removed from the framework, the
DependencyManager.serviceAdded or serviceRemoved method is called respectively.
These methods maintain a counter of services registered in the system matching
the selection criteria (service interface and target filter) :
- when a service added whose ServiceReference does not match the target
filter (if any) is ignored. Otherwise the internal
counter is incremented regardless of whether the service will actually
be bound or not
- when a service is removed it is ignored, if it is not bound. The internal
counter is only decremented if the service is bound.
The problem is, that upon service removal the counter should be decremented if
the service matches the target filter regardless of whether the service bound
or not. Otherwise the counter might not be decremented and the dependency may
be marked satisfied even though no (or not enough) service(s) are available.
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