dgraph/testutil/zero.go at master · elasticjava/dgraph · GitHub

History

169 lines (147 loc) · 4.05 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

* 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 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 testutil

import (

"bytes"

"crypto/tls"

"encoding/json"

"io/ioutil"

"net/http"

"strings"

"github.com/dgraph-io/dgo/v210"

"github.com/dgraph-io/dgo/v210/protos/api"

"github.com/pkg/errors"

"google.golang.org/grpc"

)

type Member struct {

Addr string `json:"addr"`

GroupID int `json:"groupId"`

ID string `json:"id"`

LastUpdate string `json:"lastUpdate"`

Leader bool `json:"leader"`

}

// StateResponse represents the structure of the JSON object returned by calling

// the /state endpoint in zero.

type StateResponse struct {

Zeros map[string]struct {

Id string `json:"id"`

} `json:"zeros"`

Groups map[string]struct {

Members map[string]Member `json:"members"`

Tablets map[string]struct {

GroupID int `json:"groupId"`

Predicate string `json:"predicate"`

} `json:"tablets"`

} `json:"groups"`

Removed []struct {

Addr string `json:"addr"`

GroupID int `json:"groupId"`

ID string `json:"id"`

} `json:"removed"`

}

// GetState queries the /state endpoint in zero and returns the response.

func GetState() (*StateResponse, error) {

resp, err := http.Get("http://" + SockAddrZeroHttp + "/state")

if err != nil {

return nil, err

}

defer resp.Body.Close()

b, err := ioutil.ReadAll(resp.Body)

if err != nil {

return nil, err

}

if bytes.Contains(b, []byte("Error")) {

return nil, errors.Errorf("Failed to get state: %s", string(b))

}

var st StateResponse

if err := json.Unmarshal(b, &st); err != nil {

return nil, err

}

return &st, nil

}

// GetStateHttps queries the /state endpoint in zero and returns the response.

func GetStateHttps(tlsConfig *tls.Config) (*StateResponse, error) {

client := &http.Client{

Transport: &http.Transport{

TLSClientConfig: tlsConfig,

}

resp, err := client.Get("https://" + SockAddrZeroHttp + "/state")

if err != nil {

return nil, err

}

defer resp.Body.Close()

b, err := ioutil.ReadAll(resp.Body)

if err != nil {

return nil, err

}

if bytes.Contains(b, []byte("Error")) {

return nil, errors.Errorf("Failed to get state: %s", string(b))

}

var st StateResponse

if err := json.Unmarshal(b, &st); err != nil {

return nil, err

}

return &st, nil

}

// GetClientToGroup returns a dgraph client connected to an alpha in the given group.

func GetClientToGroup(gid string) (*dgo.Dgraph, error) {

state, err := GetState()

if err != nil {

return nil, err

}

group, ok := state.Groups[gid]

if !ok {

return nil, errors.Errorf("group %s does not exist", gid)

}

if len(group.Members) == 0 {

return nil, errors.Errorf("the group %s has no members", gid)

}

// Select the first member found in the iteration.

var member Member

for _, m := range group.Members {

member = m

break

}

parts := strings.Split(member.Addr, ":")

if len(parts) != 2 {

return nil, errors.Errorf("the member has an invalid address: %v", member.Addr)

}

addr := ContainerAddr(parts[0], 9080)

conn, err := grpc.Dial(addr, grpc.WithInsecure())

if err != nil {

return nil, err

}

return dgo.NewDgraphClient(api.NewDgraphClient(conn)), nil

}

func GetNodesInGroup(gid string) ([]string, error) {

state, err := GetState()

if err != nil {

return nil, err

}

group, ok := state.Groups[gid]

if !ok {

return nil, errors.Errorf("group %s does not exist", gid)

}

if len(group.Members) == 0 {

return nil, errors.Errorf("the group %s has no members", gid)

}

nodes := make([]string, 0)

for id := range group.Members {

nodes = append(nodes, id)

}

return nodes, nil

}

dgraph/testutil/zero.go at master · elasticjava/dgraph · GitHub

Expand file tree

Breadcrumbs

zero.go

Latest commit

History

Breadcrumbs

zero.go

File metadata and controls