Mercurial > gemma

annotate pkg/geoserver/boot.go @ 868:aa8f30c1ed27 geo-style

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Moved GeoServer configuration to own package.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sat, 29 Sep 2018 22:34:24 +0200
parents cmd/gemma/geoserver.go@f827dc4f3e95
children da526b58c9c4
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868
aa8f30c1ed27 Moved GeoServer configuration to own package.
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1 package geoserver
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2
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3 import (
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4 "bytes"
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5 "encoding/json"
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6 "fmt"
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7 "log"
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8 "net"
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9 "net/http"
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10 "net/url"
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11 "strings"
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12 "time"
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13
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c1047fd04a3a Moved project specific Go packages to new pkg folder.
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14 "gemma.intevation.de/gemma/pkg/config"
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15 "gemma.intevation.de/gemma/pkg/models"
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16 )
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17
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18 const (
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19 workspaceName = "gemma"
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20 datastoreName = "gemma"
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21 databaseScheme = "waterway"
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22 databaseType = "postgis"
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23 )
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24
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25 const (
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26 startupSQL = `SELECT public.setrole('${user,'||encode('waterway_user', 'hex')||'}')`
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27 closeupSQL = `RESET ROLE`
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28 )
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30 func basicAuth(user, password string) func(req *http.Request) {
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31 return func(req *http.Request) {
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32 req.SetBasicAuth(user, password)
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33 }
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34 }
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35
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36 func asJSON(req *http.Request) {
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37 req.Header.Set("Content-Type", "application/json")
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38 }
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39
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40 func ensureWorkspace() error {
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41 var (
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42 url = config.GeoServerURL()
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43 user = config.GeoServerUser()
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44 password = config.GeoServerPassword()
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45 auth = basicAuth(user, password)
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46 )
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47
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48 // Probe workspace.
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49 req, err := http.NewRequest(
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50 http.MethodGet,
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51 url+"/rest/workspaces/"+workspaceName+".json",
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52 nil)
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53 if err != nil {
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54 return err
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55 }
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56 auth(req)
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57 resp, err := http.DefaultClient.Do(req)
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58 if err != nil {
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59 return err
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60 }
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61
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62 if resp.StatusCode != http.StatusNotFound {
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63 log.Println("info: workspace " + workspaceName + " already exists.")
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64 return nil
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65 }
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66
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67 // Create workspace
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68
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69 log.Println("info: creating workspace " + workspaceName)
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70
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71 const createJSON = `{"workspace":{"name":"` + workspaceName + `"}}`
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72
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73 req, err = http.NewRequest(
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74 http.MethodPost,
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75 url+"/rest/workspaces",
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76 strings.NewReader(createJSON))
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77 if err != nil {
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78 return err
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79 }
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80 auth(req)
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81 asJSON(req)
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82 if resp, err = http.DefaultClient.Do(req); err != nil {
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83 return err
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84 }
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85
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86 if resp.StatusCode != http.StatusCreated {
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87 err = fmt.Errorf("Status code '%s' (%d)",
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88 http.StatusText(resp.StatusCode),
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89 resp.StatusCode)
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90 }
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91
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92 return err
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93 }
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94
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95 func ensureDataStore() error {
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96 var (
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97 url = config.GeoServerURL()
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98 user = config.GeoServerUser()
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99 password = config.GeoServerPassword()
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100 auth = basicAuth(user, password)
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101 )
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102
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103 // Probe datastore.
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104 req, err := http.NewRequest(
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105 http.MethodGet,
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106 url+"/rest/workspaces/"+workspaceName+"/datastores/"+datastoreName+".json",
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107 nil)
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108 if err != nil {
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109 return err
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110 }
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111 auth(req)
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112 resp, err := http.DefaultClient.Do(req)
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113 if err != nil {
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114 return err
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115 }
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116
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117 if resp.StatusCode != http.StatusNotFound {
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118 log.Println("info: datastore " + datastoreName + " already exists.")
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119 return nil
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120 }
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121
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122 // Create datastore.
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123 log.Println("info: creating datastore " + datastoreName)
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124
386
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125 type entry struct {
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126 Key interface{} `json:"@key"`
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127 Value interface{} `json:"$"`
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128 }
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129
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130 // Create datastore.
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131 ds := map[string]interface{}{
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132 "dataStore": map[string]interface{}{
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133 "name": datastoreName,
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134 "connectionParameters": map[string]interface{}{
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135 "entry": []entry{
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136 {"host", config.DBHost()},
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137 {"port", config.DBPort()},
395
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138 {"database", config.DBName()},
386
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139 {"schema", databaseScheme},
517
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140 {"user", config.DBUser()},
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141 {"passwd", config.DBPassword()},
386
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142 {"dbtype", databaseType},
433
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143 {"Session startup SQL", startupSQL},
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144 {"Session close-up SQL", closeupSQL},
386
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145 },
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146 },
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147 },
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148 }
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149 var out bytes.Buffer
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150 enc := json.NewEncoder(&out)
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151 if err := enc.Encode(&ds); err != nil {
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152 return err
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153 }
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154
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155 req, err = http.NewRequest(
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156 http.MethodPost,
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157 url+"/rest/workspaces/"+workspaceName+"/datastores",
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158 bytes.NewReader(out.Bytes()))
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159 if err != nil {
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160 return err
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161 }
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162 auth(req)
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163 asJSON(req)
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164 resp, err = http.DefaultClient.Do(req)
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165 if err != nil {
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166 return err
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167 }
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168
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169 if resp.StatusCode != http.StatusCreated {
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170 err = fmt.Errorf("Status code '%s' (%d)",
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171 http.StatusText(resp.StatusCode),
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172 resp.StatusCode)
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173 }
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174
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175 return err
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176 }
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177
395
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178 func ensureFeatures() error {
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179 var (
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180 url = config.GeoServerURL()
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181 user = config.GeoServerUser()
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182 password = config.GeoServerPassword()
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183 auth = basicAuth(user, password)
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184 )
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185
474
11d80120ed3d Renamed published services to internal services to be more symmetrical to external services.
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186 tables := models.InternalServices.Filter(models.IntWFS)
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187 if len(tables) == 0 {
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188 log.Println("info: no tables to publish")
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189 return nil
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190 }
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191
395
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192 log.Printf("info: number of tables to publish %d\n", len(tables))
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193
398
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194 var features struct {
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195 FeatureTypes struct {
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196 FeatureType []struct {
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197 Name string `json:"name"`
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198 } `json:"featureType"`
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199 } `json:"featureTypes"`
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200 }
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201
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202 hasFeature := func(name string) bool {
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203 for _, ft := range features.FeatureTypes.FeatureType {
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204 if ft.Name == name {
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205 return true
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206 }
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207 }
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208 return false
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209 }
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210
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211 // Fetch all featuretypes.
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212 req, err := http.NewRequest(
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213 http.MethodGet,
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214 url+"/rest/workspaces/"+workspaceName+
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215 "/datastores/"+datastoreName+
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216 "/featuretypes.json",
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diff changeset
217 nil)
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diff changeset
218 if err != nil {
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219 return err
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220 }
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221 auth(req)
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222 resp, err := http.DefaultClient.Do(req)
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diff changeset
223 if err != nil {
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diff changeset
224 return err
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diff changeset
225 }
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226
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227 err = json.NewDecoder(resp.Body).Decode(&features)
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diff changeset
228 resp.Body.Close()
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diff changeset
229 if err != nil {
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diff changeset
230 // XXX: Quirk in the JSON return by GeoServer:
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231 // If there are no features in the datastore
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232 // featureType deserializes to an empty string ""
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diff changeset
233 // instead of an empty array *palmface*.
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234 // So assume there no features.
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235 hasFeature = func(string) bool { return false }
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236 }
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237
449
a74b8c2a4e75 Removed the command line option to publish tables with GeoServer.
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diff changeset
238 for i := range tables {
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diff changeset
239 table := tables[i].Name
444
c315885825e5 Publish WFS layers on GeoServer from database configuration.
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240
398
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diff changeset
241 if hasFeature(table) {
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diff changeset
242 log.Printf("info: featuretype %s already exists.\n", table)
395
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diff changeset
243 continue
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244 }
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245
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246 // Create featuretype.
398
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247 log.Printf("info: creating featuretype %s.\n", table)
395
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248
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249 // Create featuretype
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250 ft := map[string]interface{}{
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251 "featureType": map[string]interface{}{
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252 "name": table,
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253 "nativeName": table,
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254 "title": table,
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255 },
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256 }
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257
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258 var out bytes.Buffer
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259 enc := json.NewEncoder(&out)
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260 if err := enc.Encode(&ft); err != nil {
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261 return err
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262 }
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263
398
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264 req, err := http.NewRequest(
395
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265 http.MethodPost,
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266 url+"/rest/workspaces/"+workspaceName+
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267 "/datastores/"+datastoreName+
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268 "/featuretypes",
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269 bytes.NewReader(out.Bytes()))
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270 if err != nil {
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271 return err
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272 }
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273 auth(req)
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274 asJSON(req)
398
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275 resp, err := http.DefaultClient.Do(req)
395
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276 if err != nil {
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277 return err
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278 }
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279
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280 if resp.StatusCode != http.StatusCreated {
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281 return fmt.Errorf("Status code '%s' (%d)",
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282 http.StatusText(resp.StatusCode),
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283 resp.StatusCode)
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284 }
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285 }
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286
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287 return nil
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288 }
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289
386
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290 func prepareGeoServer() error {
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291
517
7e45aaec7081 Consolidate configuration parameters.
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292 if config.DBUser() == "" {
435
7d2afdc263b5 Don't panic if we have no metamorphic db user.
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293 log.Println("info: Need metamorphic db user to configure GeoServer")
432
5f5b3ca0c9fe Fixed wrong SQL startup script for GeoServer.
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294 return nil
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295 }
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296
395
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297 if config.GeoServerURL() == "" {
386
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298 log.Println("info: No tables to publish on GeoServer")
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299 return nil
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300 }
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301
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302 if err := ensureWorkspace(); err != nil {
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303 return err
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304 }
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305
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306 if err := ensureDataStore(); err != nil {
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307 return err
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308 }
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309
395
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310 // TODO: Styles
386
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311
395
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312 return ensureFeatures()
386
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313 }
868
aa8f30c1ed27 Moved GeoServer configuration to own package.
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314
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315 func ConfigureBoot() {
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316 log.Println("Configure GeoServer...")
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317 const maxTries = 10
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318 const sleep = time.Second * 5
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319
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320 for try := 1; try <= maxTries; try++ {
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diff changeset
321 err := prepareGeoServer()
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diff changeset
322 if err == nil {
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parents: 559
diff changeset
323 break
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diff changeset
324 }
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diff changeset
325 if try < maxTries {
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diff changeset
326 if uerr, ok := err.(*url.Error); ok {
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
327 if oerr, ok := uerr.Err.(*net.OpError); ok && oerr.Op == "dial" {
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
328 log.Printf("Failed attempt %d of %d to configure GeoServer. "+
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diff changeset
329 "Will try again in %s...\n", try, maxTries, sleep)
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diff changeset
330 time.Sleep(sleep)
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parents: 559
diff changeset
331 continue
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parents: 559
diff changeset
332 }
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
333 }
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
334 }
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
335 log.Printf("warn: configure GeoServer failed: %v\n", err)
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
336 break
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
337 }
aa8f30c1ed27 Moved GeoServer configuration to own package.
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parents: 559
diff changeset
338 }