docs: @Deactivate
      protected void deactivate(ComponentContext context, Map<String, Object> props) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(this, tc, "MongoDBService deactivate: jndiName=" + props.get(JNDI_NAME) + ", database=" + props.get(DATABASE_NAME));
  
          mongo.unregisterChangeListener(this);
          cctx.set(null);
      }