/
node.go
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/
node.go
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//go:generate sh -c "go run github.com/gomatic/renderizer --name=node --resource=node --type=Node --title=Node --article=a ../../../api/server/swagger_operations.tmpl > node_swagger.go"
//go:generate sh -c "go run github.com/gomatic/renderizer --name=node --resource=node --type=Node --title=Node ../../../api/server/swagger_definitions.tmpl > node_swagger.json"
/*
* Copyright (C) 2020 Sylvain Baubeau
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy ofthe License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specificlanguage governing permissions and
* limitations under the License.
*
*/
package server
import (
"time"
"github.com/skydive-project/skydive/graffiti/api/rest"
"github.com/skydive-project/skydive/graffiti/api/types"
"github.com/skydive-project/skydive/graffiti/graph"
shttp "github.com/skydive-project/skydive/graffiti/http"
)
const apiOrigin = "api"
// NodeResourceHandler aims to creates and manage a new Alert.
type NodeResourceHandler struct {
rest.ResourceHandler
}
// NodeAPIHandler aims to exposes the Alert API.
type NodeAPIHandler struct {
g *graph.Graph
}
// New creates a new node
func (h *NodeAPIHandler) New() rest.Resource {
return &types.Node{Node: new(graph.Node)}
}
// Name returns resource name "node"
func (h *NodeAPIHandler) Name() string {
return "node"
}
// Index returns the list of existing nodes
func (h *NodeAPIHandler) Index() map[string]rest.Resource {
h.g.RLock()
nodes := h.g.GetNodes(nil)
nodeMap := make(map[string]rest.Resource, len(nodes))
for _, node := range nodes {
n := types.Node{Node: node}
nodeMap[string(node.ID)] = &n
}
h.g.RUnlock()
return nodeMap
}
// Get returns a node with the specified id
func (h *NodeAPIHandler) Get(id string) (rest.Resource, bool) {
h.g.RLock()
defer h.g.RUnlock()
n := h.g.GetNode(graph.Identifier(id))
if n == nil {
return nil, false
}
return &types.Node{Node: n}, true
}
// Decorate the specified node
func (h *NodeAPIHandler) Decorate(resource rest.Resource) {
}
// Create adds the specified node to the graph
func (h *NodeAPIHandler) Create(resource rest.Resource, createOpts *rest.CreateOptions) error {
node := resource.(*types.Node)
graphNode := node.Node
if graphNode.CreatedAt.IsZero() {
graphNode.CreatedAt = graph.Time(time.Now())
}
if graphNode.UpdatedAt.IsZero() {
graphNode.UpdatedAt = graphNode.CreatedAt
}
if graphNode.Origin == "" {
graphNode.Origin = graph.Origin(h.g.GetHost(), apiOrigin)
}
if graphNode.Metadata == nil {
graphNode.Metadata = graph.Metadata{}
}
h.g.Lock()
err := h.g.AddNode(graphNode)
h.g.Unlock()
return err
}
// Delete the node with the specified id from the graph
func (h *NodeAPIHandler) Delete(id string) error {
h.g.Lock()
defer h.g.Unlock()
node := h.g.GetNode(graph.Identifier(id))
if node == nil {
return rest.ErrNotFound
}
return h.g.DelNode(node)
}
// Update a node metadata
func (h *NodeAPIHandler) Update(id string, resource rest.Resource) (rest.Resource, bool, error) {
h.g.Lock()
defer h.g.Unlock()
// Current node, to be updated
n := h.g.GetNode(graph.Identifier(id))
if n == nil {
return nil, false, rest.ErrNotFound
}
// Node containing the metadata updated
patchedNode := resource.(*types.Node)
// Do not modify/replace Metadata.(TID|Name|Type), use actual node values
if actualTID, _ := n.Metadata.GetFieldString("TID"); actualTID != "" {
patchedNode.Metadata.SetField("TID", actualTID)
}
actualName, _ := n.Metadata.GetFieldString("Name")
patchedNode.Metadata.SetField("Name", actualName)
actualType, _ := n.Metadata.GetFieldString("Type")
patchedNode.Metadata.SetField("Type", actualType)
// Update actual node Metadata with new patched node
previousRevision := n.Revision
if err := h.g.SetMetadata(n, patchedNode.Metadata); err != nil {
return nil, false, err
}
return &types.Node{Node: n}, n.Revision != previousRevision, nil
}
// RegisterNodeAPI registers the node API
func RegisterNodeAPI(apiServer *Server, g *graph.Graph, authBackend shttp.AuthenticationBackend) *NodeAPIHandler {
nodeAPIHandler := &NodeAPIHandler{
g: g,
}
apiServer.RegisterAPIHandler(nodeAPIHandler, authBackend)
return nodeAPIHandler
}