Dependency Manger - multiple instances of service

[Jan J. Roman]

Hello,

I am exploring possibility of using felix and osgi in general for
developing home automation project on raspberry pi.

I created PinService of which one instance reflects one physical pin on
RPI. Instances are identified by property value. Now I am building service
which relay on two pins so I need two instances of PinServiceImpl in one
activator.

I am using Felix Dependency Manager to simplify dependencies and to inject
services. Below is a code that I am working with however it is not ideal as
it uses two different classes to inject one service to each class. I would
like to have two instances injected into one class.

Is there out of the box way to achieve this?
Is there better way to manage dependencies in osgi & felix?

in Activator:

 public void init(BundleContext bundleContext, DependencyManager
dependencyManager) throws Exception {
        {
dependencyManager.add(createComponent()
                            .setInterface(Object.class.getName(), null)
                            .setImplementation(PinConsumerFan.class)
                            .add(createServiceDependency()
                                    .setService(IGPIOPin.class,
"(PinNumber=1)")
                                    .setRequired(true))

.add(createServiceDependency().setService(LogService.class))
            );
dependencyManager.add(createComponent()
                            .setInterface(Object.class.getName(), null)
                            .setImplementation(PinConsumerDispenser.class)
                            .add(createServiceDependency()
                                    .setService(IGPIOPin.class,
"(PinNumber=2)")
                                    .setRequired(true))

.add(createServiceDependency().setService(LogService.class))
            );
}

Thanks in advance for any hints.

Regards
Jan Roman