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annotate src/luan/modules/lucene/Lucene.luan @ 1088:bae2d0c2576c

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change module naming convention
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 26 Dec 2016 22:29:36 -0700
parents 6b8ea0a9b7c9
children 3234a14bb1f8
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1 java()
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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 Html = require "luan:Html.luan"
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8 local Io = require "luan:Io.luan"
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9 local uri = Io.uri or error()
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10 local String = require "luan:String.luan"
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11 local matches = String.matches or error()
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12 local Rpc = require "luan:Rpc.luan"
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13 local LuceneIndex = require "java:luan.modules.lucene.LuceneIndex"
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14 local NumberFieldParser = require "java:luan.modules.lucene.queryparser.NumberFieldParser"
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15 local StringFieldParser = require "java:luan.modules.lucene.queryparser.StringFieldParser"
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16 local SaneQueryParser = require "java:luan.modules.lucene.queryparser.SaneQueryParser"
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17 local Version = require "java:org.apache.lucene.util.Version"
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18 local EnglishAnalyzer = require "java:org.apache.lucene.analysis.en.EnglishAnalyzer"
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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.instances = {}
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24
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25 Lucene.type = {
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26 string = LuceneIndex.STRING_FIELD_PARSER;
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27 integer = NumberFieldParser.INT;
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28 long = NumberFieldParser.LONG;
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29 double = NumberFieldParser.DOUBLE;
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30
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31 english = StringFieldParser.new(EnglishAnalyzer.new(Version.LUCENE_CURRENT))
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32 }
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33
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34 Lucene.literal = SaneQueryParser.literal
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35
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36 function Lucene.index(index_dir,default_type,default_fields)
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37 local index = {}
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38 index.dir = index_dir
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39 local java_index = LuceneIndex.new(index_dir,default_type,default_fields)
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40 -- index.indexed_fields = java_index.indexedFieldsMeta.newTable()
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41
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42 index.indexed_fields = {}
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43 local mt = {}
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44 set_metatable(index.indexed_fields,mt)
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45 function mt.__index(_,key)
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46 return java_index.getIndexedFieldParser(key)
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47 end
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48 function mt.__new_index(_,key,value)
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49 return java_index.setIndexedFieldParser(key,value)
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50 end
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51
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52 -- index.indexed_only_fields[type][field] = fn(doc)
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53 index.indexed_only_fields = java_index.indexed_only_fields
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54
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55 index.to_string = java_index.to_string
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56 -- index.backup = java_index.backup
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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
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64 -- index.close = java_index.close
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65 index.ensure_open = java_index.ensure_open
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66 index.next_id = java_index.nextId
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67 index.highlighter = java_index.highlighter
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68
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69 Lucene.instances[index] = true
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70
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71 function index.close()
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72 Lucene.instances[index] = nil
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73 java_index.close()
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74 end
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75
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76 function index.search(query, from, to, sort)
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77 from or error "missing 'from' parameter"
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78 to or error "missing 'to' parameter"
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79 local results = {}
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80 local function fn(i,doc_fn)
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81 if i >= from then
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82 results[#results+1] = doc_fn()
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83 end
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84 end
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85 local total_hits = index.advanced_search(query,fn,to,sort)
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86 return results, total_hits
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87 end
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89 function index.get_document(query)
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90 local doc
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91 local function fn(_,doc_fn)
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92 doc = doc_fn()
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93 end
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94 local total_hits = index.advanced_search(query,fn,1)
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95 total_hits <= 1 or error( "found " .. total_hits .. " documents" )
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96 return doc
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97 end
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99 function index.count(query)
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100 return index.advanced_search(query)
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101 end
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102
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103 function index.html_highlighter(query,formatter,container_tags)
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104 local highlighter = index.highlighter(query,formatter)
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105 return function(html)
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106 local list = Html.parse(html,container_tags)
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107 local result = {}
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108 for _, obj in ipairs(list) do
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109 if type(obj) == "string" then
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110 obj = highlighter(obj)
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111 end
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112 result[#result+1] = obj
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113 end
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114 return Html.to_string(result)
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115 end
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116 end
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117
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118 function index.zip(zip_file)
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119 index.snapshot( function(dir_path,file_names)
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120 zip_file.delete()
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121 local zip_path = zip_file.canonical().to_string()
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122 local dir = uri("file:"..dir_path)
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123 local dir_name = dir.name()
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124 local options = {dir=dir.parent()}
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125 for _, file_name in ipairs(file_names) do
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126 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name
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127 Io.uri("os:"..cmd,options).read_text()
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128 end
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129 end )
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130 end
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131
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132 function index.restore(zip_file)
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133 java_index.run_in_lock( function()
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134 local lucene_dir = uri("file:"..index.dir)
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135 local before_restore = lucene_dir.parent().child("before_restore.zip")
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136 index.zip(before_restore)
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137 java_index.close()
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138 lucene_dir.delete()
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139 Io.uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text()
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140 java_index.reopen()
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141 end )
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142 end
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143
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144 local function multi_error()
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145 error "multiple lucene instances"
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146 end
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147
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148 if Rpc.functions.backup == nil then
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149
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150 function Rpc.functions.lucene_backup(password)
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151 Io.password == password or error "wrong password"
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152 local zip_file = uri("file:"..index.dir).parent().child("backup.zip")
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153 index.zip(zip_file)
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154 return zip_file
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155 end
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156
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157 function Rpc.functions.lucene_restore(password,zip_file)
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158 Io.password == password or error "wrong password"
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159 local backup_zip = uri("file:"..index.dir).parent().child("backup.zip")
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160 backup_zip.write(zip_file)
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161 index.restore(backup_zip)
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162 end
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163
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164 else
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165 Rpc.functions.lucene_backup = multi_error
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166 Rpc.functions.lucene_restore = multi_error
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167 end
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168
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169 return index
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170 end
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171
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172 return Lucene