Hi,
As I'm working on OSGi, especially on how to import OSGi service into
Qi4j, I've stumbled upon ServiceReference.isActive(). The idea is to be
able to call this method to check whether the imported service is
available or not, before trying to use it. In Streamflow I want to do
this check to turn on/off features in the UI, depending on what plugins
have been installed on the server, basically.
Right now ImportedServiceReference.isActive() looks like this:
public boolean isActive()
{
return serviceInstance != null && serviceInstance.isActive();
}
---
But this means that if I haven't called get() on the reference,
isActive() will always return false, since serviceInstance == null.
Since what I want is to know whether the external service is available
or not I'd propose to change this to:
public boolean isActive()
{
getInstance();
return serviceInstance.isActive();
}
---
Which ensures that the importer has tried to connect to the external
service provider, has returned a service proxy, and now I can use the
service instance to determine if the backing service is there or not.
Does that make sense?
/Rickard
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