Felix SCR API problem/misunderstanding
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Key: FELIX-2288
URL: https://issues.apache.org/jira/browse/FELIX-2288
Project: Felix
Issue Type: Bug
Components: Declarative Services (SCR), Web Console
Reporter: Valentin Valchev
Priority: Critical
I've been playing with the Components plugin of the Web Console and it work
perfectly with the Felix SCR implementation. When I switched to ProSyst/Equinox
implementation (they are basically the same) I found a small problem.
When I disable a component, it's ID becomes -1 and I cannot enable it anymore.
As long as I disable components all their IDs becomes -1.
I opened the OSGi r4.2 specification to see if there is a reason for this
behaviour. The JavaDoc for ComponentConstants states for the component ID, that
"The value of this property is assigned by the Service Component Runtime when a
component configuration is created."
In part 112.6 Component Properties, the specification says, that 'component.id'
property is always added by the SCR but for "Each component configuration".
When a component is disabled or uninstalled, there is no configuration - it's
just a component definition. So the SCR is not required to assign ID.
As for the Web Console we can easily fix the problem by using the pair bundle +
component name for identification, instead of ID. However, since Apache SCR API
is becoming recommended OSGi API, it would be better to define a mature and
compatible API.
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