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annotate lucene/src/luan/modules/lucene/Lucene.luan @ 749:85f5444fb7d4

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add rcp lucene backup
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 15 Jul 2016 01:18:01 -0600
parents de2418d11786
children 5e3970ccd86a
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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 Html = require "luan:Html.luan"
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7 local Io = require "luan:Io.luan"
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8 local uri = Io.uri or error()
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9 local String = require "luan:String.luan"
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10 local matches = String.matches or error()
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11 local Rpc = require "luan:Rpc.luan"
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12 local Hosting = require "luan:host/Hosting.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 M = {}
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22
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23 M.instances = {}
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24
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25 M.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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31 english = StringFieldParser.new(EnglishAnalyzer.new(Version.LUCENE_CURRENT))
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32 }
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33
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34 M.literal = SaneQueryParser.literal
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35
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36 function M.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_only_fields[type][field] = fn(doc)
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43 index.indexed_only_fields = java_index.indexed_only_fields
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44
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45 index.to_string = java_index.to_string
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46 -- index.backup = java_index.backup
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47 index.snapshot = java_index.snapshot
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48 index.advanced_search = java_index.advanced_search
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49 index.search_in_transaction = java_index.search_in_transaction
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50 index.delete_all = java_index.delete_all
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51 index.delete = java_index.delete
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52 index.save = java_index.save
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53 index.update_in_transaction = java_index.update_in_transaction
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54 -- index.close = java_index.close
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55 index.ensure_open = java_index.ensure_open
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56 index.next_id = java_index.nextId
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57 index.highlighter = java_index.highlighter
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58
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59 M.instances[index] = true
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60
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61 function index.close()
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62 M.instances[index] = nil
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63 java_index.close()
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64 end
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65
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66 function index.search(query, from, to, sort)
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67 local results = {}
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68 local function fn(i,doc_fn)
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69 if i >= from then
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70 results[#results+1] = doc_fn()
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71 end
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72 end
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73 local total_hits = index.advanced_search(query,fn,to,sort)
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74 return results, total_hits
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75 end
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77 function index.get_document(query)
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78 local doc
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79 local function fn(_,doc_fn)
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80 doc = doc_fn()
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81 end
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82 local total_hits = index.advanced_search(query,fn,1)
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83 total_hits <= 1 or error( "found " .. total_hits .. " documents" )
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84 return doc
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85 end
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87 function index.count(query)
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88 return index.advanced_search(query)
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89 end
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91 function index.html_highlighter(query,formatter,container_tags)
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92 local highlighter = index.highlighter(query,formatter)
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93 return function(html)
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94 local list = Html.parse(html,container_tags)
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95 local result = {}
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96 for _, obj in ipairs(list) do
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97 if type(obj) == "string" then
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98 obj = highlighter(obj)
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99 end
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100 result[#result+1] = obj
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101 end
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102 return Html.to_string(result)
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103 end
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104 end
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105
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106 function index.zip(zip_file)
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107 index.snapshot( function(dir,file_names)
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108 local t = {}
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109 for _, file_name in ipairs(file_names) do
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110 t[#t+1] = dir.."/"..file_name
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111 end
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112 local base = uri("file:"..dir).parent().to_string()
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113 zip_file.zip(base,t)
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114 end )
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115 end
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116
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117 if Rpc.functions.backup == nil then
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118 function Rpc.functions.lucene_backup(password)
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119 if Hosting.password ~= nil and Hosting.password ~= password then
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120 error "wrong password"
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121 end
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122 local zip_file = uri("file:"..index.dir).parent().child("backup.zip")
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123 index.zip(zip_file)
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124 return zip_file
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125 end
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126 else
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127 function Rpc.functions.lucene_backup()
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128 error "multiple lucene instance"
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129 end
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130 end
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131
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132 return index
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133 end
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134
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135 return M