Dependent Resource Standalone Building Blocks

[csviri]

This issue is about a design aspect of DependentResources. See other issues by related labels.

The goal in nutshell, is that a DependentResource should be implementation should be usable independently of the controller internal. So something like this should be doable:

@ControllerConfiguration
public class MyReconciler
    implements Reconciler<MyResource>,
    EventSourceInitializer<MyResource> {

  // this will be probably KubernetesDependentResource or similar
  DependentResource<Deployment> dependentResource;

  public MySQLSchemaReconciler(KubernetesClient client) {
      dependentResource = new DependentResource(client, ...)
  }

  @Override
  public List<EventSource> prepareEventSources(
     return List.of(dependentResource.initEventSource())
  }

  @Override
  public UpdateControl<MyResource> reconcile(MyResource schema, Context context) {
       dependentResource.reconcile(schema,context)
  }

Maybe we should differentiate at the end between DependentResource and ManagedDependentResource.