Mercurial Hosting > luan
annotate src/luan/modules/lucene/Lucene.luan @ 1342:60599adc27b8
add lucene search options
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 20 Feb 2019 12:09:51 -0700 |
parents | a015a0b5c388 |
children | 7d9a1f8894b0 |
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1 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 Html = require "luan:Html.luan" |
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8 local Io = require "luan:Io.luan" |
746 | 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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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.java = java_index |
796 | 41 -- index.indexed_fields = java_index.indexedFieldsMeta.newTable() |
42 | |
43 index.indexed_fields = {} | |
44 local mt = {} | |
45 set_metatable(index.indexed_fields,mt) | |
46 function mt.__index(_,key) | |
47 return java_index.getIndexedFieldParser(key) | |
48 end | |
49 function mt.__new_index(_,key,value) | |
50 return java_index.setIndexedFieldParser(key,value) | |
51 end | |
618
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52 |
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53 index.to_string = java_index.to_string |
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54 -- index.backup = java_index.backup |
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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.update_in_transaction = java_index.update_in_transaction |
709 | 62 -- index.close = java_index.close |
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63 index.ensure_open = java_index.ensure_open |
617 | 64 index.next_id = java_index.nextId |
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65 index.highlighter = java_index.highlighter |
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66 index.indexed_only_field = java_index.indexed_only_field |
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67 index.count_tokens = java_index.count_tokens |
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68 |
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69 Lucene.instances[index] = true |
709 | 70 |
71 function index.close() | |
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72 Lucene.instances[index] = nil |
709 | 73 java_index.close() |
74 end | |
75 | |
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76 function index.search( query, from, to, options ) |
770 | 77 from or error "missing 'from' parameter" |
78 to or error "missing 'to' parameter" | |
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79 options = options or {} |
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80 local explain_fld = options.explain |
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81 local score_fld = options.score |
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82 local results = {} |
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83 local function fn(i,doc_fn,score) |
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84 if i >= from then |
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85 local doc |
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86 if explain_fld == nil then |
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87 doc = doc_fn() |
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88 else |
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89 local explanation |
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90 doc, explanation = doc_fn("explain") |
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91 doc[explain_fld] = explanation.toString() |
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92 end |
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93 if score_fld ~= nil then |
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94 doc[score_fld] = score |
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95 end |
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96 results[#results+1] = doc |
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97 end |
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98 end |
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99 local total_hits = index.advanced_search(query,fn,to,options.sort) |
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100 return results, total_hits |
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101 end |
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102 |
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103 function index.get_document(query) |
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104 local doc |
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105 local function fn(_,doc_fn) |
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106 doc = doc_fn() |
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107 end |
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108 local total_hits = index.advanced_search(query,fn,1) |
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109 total_hits <= 1 or error( "found " .. total_hits .. " documents" ) |
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110 return doc |
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111 end |
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112 |
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113 function index.count(query) |
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114 return index.advanced_search(query) |
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115 end |
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116 |
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117 function index.html_highlighter(query,formatter,container_tags) |
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118 local highlighter = index.highlighter(query,formatter) |
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119 return function(html) |
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120 local list = Html.parse(html,container_tags) |
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121 local result = {} |
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122 for _, obj in ipairs(list) do |
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123 if type(obj) == "string" then |
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124 obj = highlighter(obj) |
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125 end |
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126 result[#result+1] = obj |
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127 end |
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128 return Html.to_string(result) |
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129 end |
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130 end |
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131 |
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132 function index.zip(zip_file) |
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133 index.snapshot( function(dir_path,file_names) |
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134 zip_file.delete() |
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135 local zip_path = zip_file.canonical().to_string() |
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136 local dir = uri("file:"..dir_path) |
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137 local dir_name = dir.name() |
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138 local options = {dir=dir.parent()} |
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139 for _, file_name in ipairs(file_names) do |
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140 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name |
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141 Io.uri("os:"..cmd,options).read_text() |
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142 end |
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143 end ) |
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144 end |
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145 |
754 | 146 function index.restore(zip_file) |
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147 java_index.run_in_lock( function() |
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148 local lucene_dir = uri("file:"..index.dir) |
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149 local before_restore = lucene_dir.parent().child("before_restore.zip") |
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150 index.zip(before_restore) |
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151 java_index.close() |
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152 lucene_dir.delete() |
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153 Io.uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text() |
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154 java_index.reopen() |
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155 end ) |
754 | 156 end |
157 | |
158 local function multi_error() | |
159 error "multiple lucene instances" | |
160 end | |
161 | |
1133 | 162 if Rpc.functions.lucene_backup == nil then |
754 | 163 |
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164 function Rpc.functions.lucene_backup(password) |
757 | 165 Io.password == password or error "wrong password" |
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166 local zip_file = uri("file:"..index.dir).parent().child("backup.zip") |
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167 index.zip(zip_file) |
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168 return zip_file |
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169 end |
754 | 170 |
171 function Rpc.functions.lucene_restore(password,zip_file) | |
757 | 172 Io.password == password or error "wrong password" |
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173 local backup_zip = uri("file:"..index.dir).parent().child("backup.zip") |
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174 backup_zip.write(zip_file) |
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175 index.restore(backup_zip) |
754 | 176 end |
177 | |
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178 else |
754 | 179 Rpc.functions.lucene_backup = multi_error |
180 Rpc.functions.lucene_restore = multi_error | |
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181 end |
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182 |
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183 return index |
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184 end |
503 | 185 |
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186 return Lucene |