Mercurial Hosting > luan
annotate src/luan/modules/lucene/Lucene.luan @ 1368:5225cd6ed478
add Lucene schedule_backups_to
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 18 Jun 2019 21:56:53 -0600 |
parents | 836e00bf7ce2 |
children | 709f7498a363 |
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1 require "java" |
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2 local Luan = require "luan:Luan.luan" |
503 | 3 local error = Luan.error |
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4 local ipairs = Luan.ipairs or error() |
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5 local type = Luan.type or error() |
796 | 6 local set_metatable = Luan.set_metatable or error() |
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7 local Boot = require "luan:Boot.luan" |
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8 local Html = require "luan:Html.luan" |
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9 local Io = require "luan:Io.luan" |
746 | 10 local uri = Io.uri or error() |
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11 local String = require "luan:String.luan" |
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12 local matches = String.matches or error() |
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13 local Thread = require "luan:Thread.luan" |
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14 local schedule = Thread.schedule or error() |
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15 local run_for_backup = Thread.run_for_backup or error() |
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16 local Time = require "luan:Time.luan" |
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17 local Rpc = require "luan:Rpc.luan" |
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18 local LuceneIndex = require "java:luan.modules.lucene.LuceneIndex" |
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19 local NumberFieldParser = require "java:luan.lib.queryparser.NumberFieldParser" |
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20 local SaneQueryParser = require "java:luan.lib.queryparser.SaneQueryParser" |
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21 local Logging = require "luan:logging/Logging.luan" |
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22 local logger = Logging.logger "Lucene" |
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23 |
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24 |
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25 local Lucene = {} |
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26 |
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27 Lucene.instances = {} |
709 | 28 |
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29 Lucene.type = { |
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30 english = LuceneIndex.ENGLISH_FIELD_PARSER |
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31 string = LuceneIndex.STRING_FIELD_PARSER |
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32 integer = NumberFieldParser.INT |
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33 long = NumberFieldParser.LONG |
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34 double = NumberFieldParser.DOUBLE |
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35 } |
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36 |
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37 Lucene.literal = SaneQueryParser.literal |
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38 |
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39 function Lucene.index(index_dir,default_type,default_fields) |
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40 local index = {} |
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41 index.dir = index_dir |
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42 local java_index, closer = LuceneIndex.getLuceneIndex(index_dir,default_type,default_fields) |
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43 index.java = java_index |
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44 index.closer = closer or error() |
796 | 45 |
46 index.indexed_fields = {} | |
47 local mt = {} | |
48 set_metatable(index.indexed_fields,mt) | |
49 function mt.__index(_,key) | |
50 return java_index.getIndexedFieldParser(key) | |
51 end | |
52 function mt.__new_index(_,key,value) | |
53 return java_index.setIndexedFieldParser(key,value) | |
54 end | |
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55 |
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56 index.to_string = java_index.to_string |
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57 index.snapshot = java_index.snapshot |
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58 index.advanced_search = java_index.advanced_search |
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59 index.search_in_transaction = java_index.search_in_transaction |
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60 index.delete_all = java_index.delete_all |
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61 index.delete = java_index.delete |
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62 index.save = java_index.save |
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63 index.update_in_transaction = java_index.update_in_transaction |
709 | 64 -- index.close = java_index.close |
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65 index.ensure_open = java_index.ensure_open |
617 | 66 index.next_id = java_index.nextId |
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67 index.highlighter = java_index.highlighter |
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68 index.indexed_only_fields = java_index.indexed_only_fields |
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69 index.count_tokens = java_index.count_tokens |
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70 |
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71 Lucene.instances[index] = true |
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73 function index.close() | |
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74 Lucene.instances[index] = nil |
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75 closer.close() |
709 | 76 end |
77 | |
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78 function index.search( query, from, to, options ) |
770 | 79 from or error "missing 'from' parameter" |
80 to or error "missing 'to' parameter" | |
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81 options = options or {} |
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82 local explain_fld = options.explain |
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83 local score_fld = options.score |
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84 local results = {} |
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85 local function fn(i,doc_fn,score) |
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86 if i >= from then |
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87 local doc |
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88 if explain_fld == nil then |
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89 doc = doc_fn() |
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90 else |
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91 local explanation |
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92 doc, explanation = doc_fn("explain") |
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93 doc[explain_fld] = explanation.toString() |
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94 end |
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95 if score_fld ~= nil then |
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96 doc[score_fld] = score |
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97 end |
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98 results[#results+1] = doc |
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99 end |
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100 end |
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101 local total_hits = index.advanced_search(query,fn,to,options.sort) |
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102 return results, total_hits |
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103 end |
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104 |
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105 function index.get_document(query) |
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106 local doc |
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108 doc = doc_fn() |
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109 end |
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110 local total_hits = index.advanced_search(query,fn,1) |
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111 total_hits <= 1 or error( "found " .. total_hits .. " documents" ) |
257
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112 return doc |
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113 end |
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114 |
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115 function index.count(query) |
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116 return index.advanced_search(query) |
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117 end |
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118 |
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119 function index.html_highlighter(query,formatter,container_tags) |
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120 local highlighter = index.highlighter(query,formatter) |
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121 return function(html) |
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122 local list = Html.parse(html,container_tags) |
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123 local result = {} |
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124 for _, obj in ipairs(list) do |
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125 if type(obj) == "string" then |
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126 obj = highlighter(obj) |
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127 end |
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128 result[#result+1] = obj |
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129 end |
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130 return Html.to_string(result) |
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131 end |
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132 end |
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133 |
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134 function index.backup_to(backup_dir) |
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135 backup_dir.delete() |
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136 backup_dir.mkdir() |
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137 index.snapshot( function(dir_path,file_names) |
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138 local lucene_dir = uri("file:"..dir_path) |
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139 for _, file_name in ipairs(file_names) do |
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140 local lucene_file = lucene_dir.child(file_name) |
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141 local backup_file = backup_dir.child(file_name) |
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142 backup_file.link_to(lucene_file) |
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143 end |
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144 end ) |
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145 end |
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146 |
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147 function index.schedule_backups_to(backup_dir,repeating_delay) |
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148 local lucene_dir = uri("file:"..index.dir) |
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149 local function backup() |
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150 if backup_dir.last_modified() < lucene_dir.last_modified() then |
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151 run_for_backup(function() |
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152 index.backup_to(backup_dir) |
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153 logger.info "backup" |
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154 end) |
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155 end |
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156 end |
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157 schedule( backup, { |
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158 repeating_delay = repeating_delay or Time.period{minutes=10} |
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159 run_on_close = true |
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160 daemon = true |
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161 } ) |
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162 end |
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163 |
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164 function index.zip(zip_file) |
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165 index.snapshot( function(dir_path,file_names) |
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166 zip_file.delete() |
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167 local zip_path = zip_file.canonical().to_string() |
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168 local dir = uri("file:"..dir_path) |
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169 local dir_name = dir.name() |
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170 local options = {dir=dir.parent()} |
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171 for _, file_name in ipairs(file_names) do |
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172 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name |
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173 Io.uri("os:"..cmd,options).read_text() |
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174 end |
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175 end ) |
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176 end |
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177 index.zip = Boot.no_security(index.zip) |
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178 |
754 | 179 function index.restore(zip_file) |
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180 java_index.run_in_lock( function() |
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181 local lucene_dir = uri("file:"..index.dir) |
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182 local before_restore = lucene_dir.parent().child("before_restore.zip") |
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183 index.zip(before_restore) |
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184 java_index.doClose() |
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185 lucene_dir.delete() |
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186 Io.uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text() |
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187 java_index.reopen() |
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188 end ) |
754 | 189 end |
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190 index.restore = Boot.no_security(index.restore) |
754 | 191 |
192 local function multi_error() | |
193 error "multiple lucene instances" | |
194 end | |
195 | |
1133 | 196 if Rpc.functions.lucene_backup == nil then |
754 | 197 |
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198 function Rpc.functions.lucene_backup(password) |
757 | 199 Io.password == password or error "wrong password" |
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200 local zip_file = uri("file:"..index.dir).parent().child("backup.zip") |
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201 index.zip(zip_file) |
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202 return zip_file |
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203 end |
754 | 204 |
205 function Rpc.functions.lucene_restore(password,zip_file) | |
757 | 206 Io.password == password or error "wrong password" |
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207 local backup_zip = uri("file:"..index.dir).parent().child("backup.zip") |
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208 backup_zip.write(zip_file) |
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209 index.restore(backup_zip) |
754 | 210 end |
211 | |
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212 else |
754 | 213 Rpc.functions.lucene_backup = multi_error |
214 Rpc.functions.lucene_restore = multi_error | |
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215 end |
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216 |
230
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217 return index |
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218 end |
503 | 219 |
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220 return Lucene |