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message.go
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/
message.go
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/*
* Copyright (C) 2015 Red Hat, Inc.
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 of the 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
* specific language governing permissions and limitations
* under the License.
*
*/
package graph
import (
"encoding/json"
"errors"
)
type WSMessage struct {
Type string
Obj interface{}
}
func (g WSMessage) Marshal() []byte {
j, _ := json.Marshal(g)
return j
}
func (g WSMessage) String() string {
return string(g.Marshal())
}
func UnmarshalWSMessage(b []byte) (WSMessage, error) {
msg := WSMessage{}
err := json.Unmarshal(b, &msg)
if err != nil {
return msg, err
}
if msg.Type == "SyncRequest" {
return msg, nil
}
objMap, ok := msg.Obj.(map[string]interface{})
if !ok {
return msg, errors.New("Unable to parse event: " + string(b))
}
ID := Identifier(objMap["ID"].(string))
metadata := make(Metadata)
if m, ok := objMap["Metadata"]; ok {
metadata = Metadata(m.(map[string]interface{}))
}
host := objMap["Host"].(string)
switch msg.Type {
/* Graph Section */
case "SubGraphDeleted":
fallthrough
case "NodeUpdated":
fallthrough
case "NodeDeleted":
fallthrough
case "NodeAdded":
if m, ok := objMap["Metadata"]; ok {
metadata = Metadata(m.(map[string]interface{}))
}
msg.Obj = &Node{
graphElement: graphElement{
ID: ID,
metadata: metadata,
host: host,
},
}
case "EdgeUpdated":
fallthrough
case "EdgeDeleted":
fallthrough
case "EdgeAdded":
parent := Identifier(objMap["Parent"].(string))
child := Identifier(objMap["Child"].(string))
msg.Obj = &Edge{
graphElement: graphElement{
ID: ID,
metadata: metadata,
host: host,
},
parent: parent,
child: child,
}
}
return msg, err
}