[Camel] Camel integration in the Kura CloudService

@hekonsek this feature leverages the Kura multiple connections feature recently added on the develop branch.

You need to implement a new CloudServiceFactory and a component registering a CloudService in the OSGi framework.

The Camel implementations will be CamelCloudServiceFactory and CamelCloudService.

The Kura default implementation of the CloudServiceFactory can be used as a reference implementation.

Please note that the CloudService implementation must also be a Kura ConfigurableComponent so, in the case of the CamelCloudService, its configuration could be the Camel XML routes for that CloudService instance (the same configuration of the Camel quickstart example).

[ctron]

What I mean is, that currently there is an interface CloudServiceFactory, which is never used in the Web UI. The create command kura.cloud:createConfiguration, which suggests being generic (by its naming) however is directly implemented by DefaultCloudServiceFactory, without using any interface. So the only possible way, as of now, is to make a complete manual implementation. Not using the interface and not using some sort of generic console command. And even after the creation, everything still has to be configured in a way that is not covered by the interfaces, but goes with the ConfigurableComponent construct.

Wouldn’t it make more sense to actually implement some sort of management service, hosting the configurations for different implementations and then leveraging the CloudServiceFactory to create instances based on those configurations. That way it would be possible to track the existing configurations (there would be some sort of status, even if the component did not register), there could be a state for missing components, …

Or at least provide a console command or Web UI to support this new construct.

[ctron]

Yes. And #810 is merged now.