Example #1
0
// WatchPredicate starts a watch for the items that m matches.
func (e *Store) WatchPredicate(ctx api.Context, m *generic.SelectionPredicate, resourceVersion string) (watch.Interface, error) {
	filter := e.createFilter(m)

	if name, ok := m.MatchesSingle(); ok {
		if key, err := e.KeyFunc(ctx, name); err == nil {
			if err != nil {
				return nil, err
			}
			w, err := e.Storage.Watch(ctx, key, resourceVersion, filter)
			if err != nil {
				return nil, err
			}
			if e.Decorator != nil {
				return newDecoratedWatcher(w, e.Decorator), nil
			}
			return w, nil
		}
		// if we cannot extract a key based on the current context, the optimization is skipped
	}

	w, err := e.Storage.WatchList(ctx, e.KeyRootFunc(ctx), resourceVersion, filter)
	if err != nil {
		return nil, err
	}
	if e.Decorator != nil {
		return newDecoratedWatcher(w, e.Decorator), nil
	}
	return w, nil
}
Example #2
0
func (e *Store) createFilter(m *generic.SelectionPredicate) storage.Filter {
	filterFunc := func(obj runtime.Object) bool {
		matches, err := m.Matches(obj)
		if err != nil {
			glog.Errorf("unable to match watch: %v", err)
			return false
		}
		return matches
	}
	return storage.NewSimpleFilter(filterFunc, m.MatcherIndex)
}
Example #3
0
// ListPredicate returns a list of all the items matching m.
func (e *Store) ListPredicate(ctx api.Context, m *generic.SelectionPredicate, options *api.ListOptions) (runtime.Object, error) {
	list := e.NewListFunc()
	filter := e.createFilter(m)
	if name, ok := m.MatchesSingle(); ok {
		if key, err := e.KeyFunc(ctx, name); err == nil {
			err := e.Storage.GetToList(ctx, key, filter, list)
			return list, storeerr.InterpretListError(err, e.QualifiedResource)
		}
		// if we cannot extract a key based on the current context, the optimization is skipped
	}

	if options == nil {
		options = &api.ListOptions{ResourceVersion: "0"}
	}
	err := e.Storage.List(ctx, e.KeyRootFunc(ctx), options.ResourceVersion, filter, list)
	return list, storeerr.InterpretListError(err, e.QualifiedResource)
}