Golang Graph.OutboundEdges方法代碼示例

func getImageStreamSize(g graph.Graph, node *imagegraph.ImageStreamNode) (int64, int, int) {
	imageEdges := g.OutboundEdges(node, ImageStreamImageEdgeKind)
	storage := int64(0)
	images := len(imageEdges)
	layers := 0
	blobSet := sets.NewString()
	for _, e := range imageEdges {
		imageNode, ok := e.To().(*imagegraph.ImageNode)
		if !ok {
			continue
		}
		image := imageNode.Image
		layers += len(image.DockerImageLayers)
		// we're counting only unique layers per the entire stream
		for _, layer := range image.DockerImageLayers {
			if blobSet.Has(layer.Name) {
				continue
			}
			blobSet.Insert(layer.Name)
			storage += layer.LayerSize
		}
		if len(image.DockerImageConfig) > 0 && !blobSet.Has(image.DockerImageMetadata.ID) {
			blobSet.Insert(image.DockerImageMetadata.ID)
			storage += int64(len(image.DockerImageConfig))
		}
	}

	return storage, images, layers
}

func markParentsInGraph(g graph.Graph) {
	imageNodes := getImageNodes(g.Nodes())
	for _, in := range imageNodes {
		// find image's top layer, should be just one
		for _, e := range g.OutboundEdges(in, ImageTopLayerEdgeKind) {
			layerNode, _ := e.To().(*imagegraph.ImageLayerNode)
			// find image's containing this layer but not being their top layer
			for _, ed := range g.InboundEdges(layerNode, ImageLayerEdgeKind) {
				childNode, _ := ed.From().(*imagegraph.ImageNode)
				if in.ID() == childNode.ID() {
					// don't add self edge, otherwise gonum/graph will panic
					continue
				}
				g.AddEdge(in, childNode, ParentImageEdgeKind)
			}
			// TODO: Find image's containing THIS layer being their top layer,
			// this happens when image contents is not being changed.

			// TODO: If two layers have exactly the same contents the current
			// mechanism might trip over that as well. We should check for
			// a series of layers when checking for parents.
		}
	}
}

// hasControllerRefEdge returns true if a given node contains one or more "ManagedByController" outbound edges
func hasControllerRefEdge(g osgraph.Graph, node graph.Node) bool {
	managedEdges := g.OutboundEdges(node, kubeedges.ManagedByControllerEdgeKind)
	return len(managedEdges) > 0
}