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annotate src/luan/modules/lucene/Versioning.luan @ 1153:1f4da56abd4f

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author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 04 Feb 2018 20:01:23 -0700
parents bae2d0c2576c
children 7f4a12fb7716
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1 local Luan = require "luan:Luan.luan"
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2 local error = Luan.error
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3 local pairs = Luan.pairs or error()
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4 local Number = require "luan:Number.luan"
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5 local integer = Number.integer or error()
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6 local long = Number.long or error()
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7 local String = require "luan:String.luan"
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8 local matches = String.matches or error()
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9 local sub = String.sub or error()
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10 local string_to_number = String.to_number or error()
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11 local Table = require "luan:Table.luan"
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12 local copy = Table.copy or error()
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13 local Lucene = require "luan:lucene/Lucene.luan"
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14 require "luan:logging/init.luan"
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15 local Logging = require "luan:logging/Logging.luan"
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16
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17 local logger = Logging.logger "lucene versioning"
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19
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20 local Versioning = {}
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21
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22 function Versioning.update(db,steps,version)
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23 local doc = db.get_document"type:version" or { type="version", version=integer(0) }
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24 while doc.version < version do
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25 doc.version = integer(doc.version + 1)
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26 logger.error("step "..doc.version)
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27 db.update_in_transaction( function()
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28 local step = steps[doc.version]
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29 step and step(db)
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30 db.save(doc)
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31 end )
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32 end
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33 end
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36 -- hack to deal with latest changes
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37 function Versioning.a_big_step(db)
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38 db.indexed_fields["id index"] = Lucene.type.string
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39 db.advanced_search( Lucene.literal"id index" .. ":*", function(_,doc_fn)
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40 local doc = doc_fn()
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41 for field, value in pairs(copy(doc)) do
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42 if matches(field," index$") then
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43 local new_field = sub(field,1,-7)
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44 db.indexed_fields[new_field] or error("field '"..new_field.."' not indexed")
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45 doc[new_field] = value
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46 doc[field] = nil
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47 end
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48 end
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49 doc.id = long(string_to_number(doc.id))
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50 db.save(doc)
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51 end )
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52 db.indexed_fields["type index"] = Lucene.type.string
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53 db.delete( Lucene.literal"type index" .. ":*" )
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54 end
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55
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56 return Versioning