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gremlin.go
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gremlin.go
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/*
* Copyright (C) 2016 Red Hat, Inc.
*
* 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 client
import (
"encoding/json"
"github.com/skydive-project/skydive/flow"
gclient "github.com/skydive-project/skydive/graffiti/api/client"
shttp "github.com/skydive-project/skydive/graffiti/http"
"github.com/skydive-project/skydive/sflow"
"github.com/skydive-project/skydive/topology"
"github.com/skydive-project/skydive/topology/probes/socketinfo"
)
// ErrNoResult is returned when a query returned no result
var ErrNoResult = gclient.ErrNoResult
// GremlinQueryHelper describes a gremlin query request query helper mechanism
type GremlinQueryHelper struct {
*gclient.GremlinQueryHelper
}
// GetFlows from the Gremlin query
func (g *GremlinQueryHelper) GetFlows(query interface{}) ([]*flow.Flow, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var flows []*flow.Flow
if err := json.Unmarshal(data, &flows); err != nil {
return nil, err
}
return flows, nil
}
// GetInterfaceMetrics from Gremlin query
func (g *GremlinQueryHelper) GetInterfaceMetrics(query interface{}) (map[string][]*topology.InterfaceMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result []map[string][]*topology.InterfaceMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
if len(result) == 0 {
return nil, nil
}
return result[0], nil
}
// GetSFlowMetrics from Gremlin query
func (g *GremlinQueryHelper) GetSFlowMetrics(query interface{}) (map[string][]*sflow.SFMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result []map[string][]*sflow.SFMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
if len(result) == 0 {
return nil, nil
}
return result[0], nil
}
// GetFlowMetrics from Gremlin query
func (g *GremlinQueryHelper) GetFlowMetrics(query interface{}) (map[string][]*flow.FlowMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result []map[string][]*flow.FlowMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
if len(result) == 0 {
return nil, ErrNoResult
}
return result[0], nil
}
// GetFlowMetric from Gremlin query
func (g *GremlinQueryHelper) GetFlowMetric(query interface{}) (*flow.FlowMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result flow.FlowMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
return &result, nil
}
// GetInterfaceMetric from Gremlin query
func (g *GremlinQueryHelper) GetInterfaceMetric(query interface{}) (*topology.InterfaceMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result topology.InterfaceMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
return &result, nil
}
// GetSFlowMetric from Gremlin query
func (g *GremlinQueryHelper) GetSFlowMetric(query interface{}) (*sflow.SFMetric, error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
var result sflow.SFMetric
if err := json.Unmarshal(data, &result); err != nil {
return nil, err
}
return &result, nil
}
// GetSockets from the Gremlin query
func (g *GremlinQueryHelper) GetSockets(query interface{}) (sockets map[string][]*socketinfo.ConnectionInfo, err error) {
data, err := g.Query(query)
if err != nil {
return nil, err
}
// TODO: use real objects instead of interface + decode
// should be []map[string][]ConnectionInfo
var maps []map[string][]interface{}
if err := json.Unmarshal(data, &maps); err != nil {
return nil, err
}
sockets = make(map[string][]*socketinfo.ConnectionInfo)
for id, objs := range maps[0] {
sockets[id] = make([]*socketinfo.ConnectionInfo, 0)
for _, obj := range objs {
var socket socketinfo.ConnectionInfo
if err = socket.Decode(obj); err == nil {
sockets[id] = append(sockets[id], &socket)
}
}
}
return
}
// NewGremlinQueryHelper creates a new Gremlin query helper based on authentication
func NewGremlinQueryHelper(restClient *shttp.RestClient) *GremlinQueryHelper {
return &GremlinQueryHelper{
GremlinQueryHelper: gclient.NewGremlinQueryHelper(restClient),
}
}
// NewGremlinQueryHelperFromConfig creates a new Gremlin query helper based on authentication based on configuration file
func NewGremlinQueryHelperFromConfig(authOptions *shttp.AuthenticationOpts) (*GremlinQueryHelper, error) {
restClient, err := NewRestClientFromConfig(authOptions)
if err != nil {
return nil, err
}
return NewGremlinQueryHelper(restClient), nil
}