Mercurial > gemma
annotate pkg/models/intservices.go @ 4072:1eb39e9e8ec2 historization_ng
Adapted fwa-import to new historization model.
author | Sascha Wilde <wilde@intevation.de> |
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date | Thu, 25 Jul 2019 14:48:38 +0200 |
parents | cabf4789e02b |
children | dfe9cde6a20c |
rev | line source |
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 // * Tom Gottfried <tom.gottfried@intevation.de> |
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14 |
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15 package models |
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16 |
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17 import ( |
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18 "context" |
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19 "database/sql" |
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20 "log" |
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21 "net/http" |
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22 "sync" |
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23 |
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24 "gemma.intevation.de/gemma/pkg/auth" |
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25 "gemma.intevation.de/gemma/pkg/config" |
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26 ) |
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27 |
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28 type IntEntry struct { |
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29 Name string `json:"name"` |
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30 Style bool `json:"style"` |
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31 WMS bool `json:"wms"` |
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32 WFS bool `json:"wfs"` |
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33 } |
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34 |
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35 type IntServices struct { |
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36 entries []IntEntry |
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37 mu sync.Mutex |
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38 } |
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39 |
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40 const ( |
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41 selectServicesSQL = ` |
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42 SELECT relname, style IS NOT NULL, as_wms, as_wfs |
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43 FROM sys_admin.published_services |
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44 JOIN pg_class ON name = oid ORDER by relname` |
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45 |
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46 selectStyleSQL = ` |
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47 SELECT XMLSERIALIZE(DOCUMENT style AS text) |
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48 FROM sys_admin.published_services |
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49 JOIN pg_class ON name = oid |
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50 WHERE relname = $1` |
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51 |
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52 updateStyleSQL = ` |
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53 UPDATE sys_admin.published_services |
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54 SET style = XMLPARSE(DOCUMENT $1) |
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55 WHERE name IN (SELECT oid FROM pg_class WHERE relname = $2)` |
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56 ) |
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57 |
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58 var InternalServices = &IntServices{} |
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59 |
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60 func (e *IntEntry) LoadStyle() (string, error) { |
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61 var style string |
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62 ctx := context.Background() |
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63 err := auth.RunAs(ctx, "sys_admin", |
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64 func(conn *sql.Conn) error { |
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65 return conn.QueryRowContext( |
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66 ctx, |
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67 selectStyleSQL, |
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68 e.Name).Scan(&style) |
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69 }) |
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70 return style, err |
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71 } |
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72 |
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73 func UpdateInternalStyle(req *http.Request, name, style string) error { |
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74 return auth.RunAsSessionUser(req, func(conn *sql.Conn) error { |
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75 _, err := conn.ExecContext( |
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76 req.Context(), updateStyleSQL, |
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77 style, name) |
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78 if err == nil { |
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79 InternalServices.Invalidate() |
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80 } |
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81 return err |
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82 }) |
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83 } |
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84 |
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85 func (ps *IntServices) Find(name string) (string, bool) { |
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86 ps.mu.Lock() |
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87 defer ps.mu.Unlock() |
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88 |
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89 if ps.entries == nil { |
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90 if err := ps.load(); err != nil { |
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91 log.Printf("error: %v\n", err) |
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92 return "", false |
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93 } |
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94 } |
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95 |
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96 if ps.has(name) { |
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97 return config.GeoServerURL() + "/" + name, true |
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98 } |
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99 return "", false |
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100 } |
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101 |
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102 func (ps *IntServices) has(service string) bool { |
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103 var check func(*IntEntry) bool |
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104 switch service { |
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105 case "wms": |
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106 check = func(e *IntEntry) bool { return e.WMS } |
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107 case "wfs": |
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108 check = func(e *IntEntry) bool { return e.WFS } |
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109 default: |
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110 return false |
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111 } |
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112 for i := range ps.entries { |
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113 if check(&ps.entries[i]) { |
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114 return true |
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115 } |
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116 } |
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117 return false |
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118 } |
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119 |
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120 func (ps *IntServices) load() error { |
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121 // make empty slice to prevent retry if slice is empty. |
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122 ps.entries = []IntEntry{} |
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123 ctx := context.Background() |
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124 return auth.RunAs(ctx, "sys_admin", |
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125 func(conn *sql.Conn) error { |
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126 rows, err := conn.QueryContext( |
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127 ctx, selectServicesSQL) |
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128 if err != nil { |
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129 return err |
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130 } |
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131 defer rows.Close() |
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132 for rows.Next() { |
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133 var entry IntEntry |
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134 if err := rows.Scan( |
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135 &entry.Name, &entry.Style, |
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136 &entry.WMS, &entry.WFS, |
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137 ); err != nil { |
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138 return err |
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139 } |
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140 ps.entries = append(ps.entries, entry) |
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141 } |
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142 return rows.Err() |
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143 }) |
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144 } |
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145 |
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146 func (ps *IntServices) Invalidate() { |
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147 ps.mu.Lock() |
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148 ps.entries = nil |
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149 ps.mu.Unlock() |
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150 } |
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151 |
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152 func InternalAll(IntEntry) bool { return true } |
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153 func IntWMS(entry IntEntry) bool { return entry.WMS } |
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154 func IntWFS(entry IntEntry) bool { return entry.WFS } |
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155 func IntWithStyle(entry IntEntry) bool { return entry.Style } |
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156 |
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157 func IntByName(name string) func(IntEntry) bool { |
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158 return func(entry IntEntry) bool { return entry.Name == name } |
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159 } |
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160 |
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161 func IntAnd(accept ...func(IntEntry) bool) func(IntEntry) bool { |
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162 return func(entry IntEntry) bool { |
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163 for _, a := range accept { |
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164 if !a(entry) { |
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165 return false |
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166 } |
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167 } |
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168 return true |
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169 } |
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170 } |
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171 |
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172 func (ps *IntServices) Filter(accept func(IntEntry) bool) []IntEntry { |
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173 ps.mu.Lock() |
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174 defer ps.mu.Unlock() |
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175 if ps.entries == nil { |
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176 if err := ps.load(); err != nil { |
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177 log.Printf("error: %v\n", err) |
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178 return nil |
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179 } |
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180 } |
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181 pe := make([]IntEntry, 0, len(ps.entries)) |
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182 for _, e := range ps.entries { |
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183 if accept(e) { |
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184 pe = append(pe, e) |
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185 } |
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186 } |
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187 |
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188 return pe |
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189 } |