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annotate src/luan/modules/lucene/Lucene.luan @ 1422:e48290f3d9fb

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better quoting
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 17 Nov 2019 16:28:51 -0700
parents c7f9dd062eda
children a076e89a2879
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1353
8d95711f6615 replace java() with require "java"
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1 require "java"
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ca169567ce07 module URIs must now include ".luan"
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2 local Luan = require "luan:Luan.luan"
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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()
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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"
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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 Rpc = require "luan:Rpc.luan"
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14 local LuceneIndex = require "java:luan.modules.lucene.LuceneIndex"
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15 local NumberFieldParser = require "java:goodjava.queryparser.NumberFieldParser"
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16 local SaneQueryParser = require "java:goodjava.queryparser.SaneQueryParser"
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17 local Logging = require "luan:logging/Logging.luan"
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18 local logger = Logging.logger "Lucene"
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19
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20
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21 local Lucene = {}
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22
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23 Lucene.type = {
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24 english = LuceneIndex.ENGLISH_FIELD_PARSER
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25 string = LuceneIndex.STRING_FIELD_PARSER
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26 integer = NumberFieldParser.INT
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27 long = NumberFieldParser.LONG
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28 double = NumberFieldParser.DOUBLE
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29 }
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30
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31 Lucene.quote = SaneQueryParser.quote
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32 Lucene.literal = Lucene.quote -- tmp
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33
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34 function Lucene.index(index_dir,options)
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35 type(index_dir)=="table" or error "index_dir must be table"
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36 index_dir.to_uri_string and matches(index_dir.to_uri_string(),"^file:") or error "must be file"
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37 options = options or {}
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38 local index = {}
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39 index.dir = index_dir
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40 local java_index = LuceneIndex.getLuceneIndex(index_dir.java.file,options)
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41 index.java = java_index
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42 index.completer = options.completer
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43
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44 index.indexed_fields = {}
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45 local mt = {}
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46 set_metatable(index.indexed_fields,mt)
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47 function mt.__index(_,key)
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48 return java_index.getIndexedFieldParser(key)
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49 end
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50 function mt.__new_index(_,key,value)
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51 return java_index.setIndexedFieldParser(key,value)
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52 end
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53
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54 index.to_string = java_index.to_string
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55 index.snapshot = java_index.snapshot
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56 index.advanced_search = java_index.advanced_search
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57 index.search_in_transaction = java_index.search_in_transaction
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58 index.delete_all = java_index.delete_all
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59 index.delete = java_index.delete
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60 index.save = java_index.save
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61 index.run_in_transaction = java_index.run_in_transaction
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62 index.ensure_open = java_index.ensure_open
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63 index.next_id = java_index.nextId
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64 index.highlighter = java_index.highlighter
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65 index.indexed_only_fields = java_index.indexed_only_fields
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66 index.count_tokens = java_index.count_tokens
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67 --index.close = java_index.close
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68
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69 index.has_postgres_backup = java_index.hasPostgresBackup()
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70 function index.rebuild_postgres_backup()
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71 java_index.rebuild_postgres_backup(index.completer)
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72 end
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73 index.restore_from_postgres = java_index.restore_from_postgres
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74 index.force_restore_from_postgres = java_index.force_restore_from_postgres
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75 function index.check()
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76 java_index.check(index.completer)
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77 end
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78
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79 function index.search( query, from, to, options )
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80 from or error "missing 'from' parameter"
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81 to or error "missing 'to' parameter"
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82 options = options or {}
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83 local explain_fld = options.explain
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84 local score_fld = options.score
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85 local results = {}
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86 local function fn(i,doc_fn,score)
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87 if i >= from then
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88 local doc
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89 if explain_fld == nil then
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90 doc = doc_fn()
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91 else
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92 local explanation
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93 doc, explanation = doc_fn("explain")
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94 doc[explain_fld] = explanation.toString()
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95 end
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96 if score_fld ~= nil then
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97 doc[score_fld] = score
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98 end
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99 results[#results+1] = doc
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100 end
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101 end
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102 local total_hits = index.advanced_search(query,fn,to,options.sort)
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103 return results, total_hits
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104 end
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105
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106 function index.get_document(query)
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107 local doc
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108 local function fn(_,doc_fn,_)
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109 doc = doc_fn()
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110 end
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111 local total_hits = index.advanced_search(query,fn,1)
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112 total_hits <= 1 or error( "found " .. total_hits .. " documents" )
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113 return doc
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114 end
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115
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116 function index.count(query)
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117 return index.advanced_search(query)
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118 end
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119
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120 function index.html_highlighter(query,formatter,container_tags)
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121 local highlighter = index.highlighter(query,formatter)
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122 return function(html)
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123 local list = Html.parse(html,container_tags)
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124 local result = {}
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125 for _, obj in ipairs(list) do
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126 if type(obj) == "string" then
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127 obj = highlighter(obj)
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128 end
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129 result[#result+1] = obj
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130 end
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131 return Html.to_string(result)
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132 end
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133 end
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134
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135 function index.zip(zip_file)
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136 index.snapshot( function(dir_path,file_names)
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137 zip_file.delete()
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138 local zip_path = zip_file.canonical().to_string()
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139 local dir = uri("file:"..dir_path)
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140 local dir_name = dir.name()
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141 local options = {dir=dir.parent()}
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142 for _, file_name in ipairs(file_names) do
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143 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name
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144 Io.uri("os:"..cmd,options).read_text()
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145 end
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146 end )
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147 end
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148 index.zip = Boot.no_security(index.zip)
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149
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150 function index.restore(zip_file)
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151 java_index.run_in_lock( function()
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152 local lucene_dir = index.dir
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153 local before_restore = lucene_dir.parent().child("before_restore.zip")
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154 index.zip(before_restore)
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155 java_index.close()
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156 lucene_dir.delete()
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157 Io.uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text()
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158 java_index.reopen()
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159 end )
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160 end
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161 index.restore = Boot.no_security(index.restore)
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162
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163 local function multi_error()
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164 error "multiple lucene instances"
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165 end
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166
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167 if Rpc.functions.lucene_backup == nil then
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168
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169 function Rpc.functions.lucene_backup(password)
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170 Io.password == password or error "wrong password"
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171 local zip_file = index.dir.parent().child("backup.zip")
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172 index.zip(zip_file)
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173 return zip_file
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174 end
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175
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176 function Rpc.functions.lucene_restore(password,zip_file)
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177 Io.password == password or error "wrong password"
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178 local backup_zip = index.dir.parent().child("backup.zip")
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179 backup_zip.write(zip_file)
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180 index.restore(backup_zip)
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181 end
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182
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183 else
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184 Rpc.functions.lucene_backup = multi_error
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185 Rpc.functions.lucene_restore = multi_error
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186 end
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187
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188 return index
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189 end
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190
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191 return Lucene