Class: IndexStorage

Inherits:
Object
  • Object
show all
Defined in:
lib/ObjectModel/Indexes/IndexStorage.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, dir) ⇒ IndexStorage

Returns a new instance of IndexStorage.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 7

def initialize name, dir
  folder = File.expand_path "#{dir}/#{name}"
  Dir.mkdir folder unless File.exist? folder   
  @db = Sequel.connect("sqlite://#{folder}/#{name}_indexes.db")
  @db.logger = log
  
  initialize_db unless @db.table_exists? :metadata           
  
  @metadata ||= @db[:metadata]   
  @tables = {}   
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 4

def db
  @db
end

#index_manager=(value) ⇒ Object (writeonly)

Sets the attribute index_manager

Parameters:

  • value —

    the value to set the attribute index_manager to.



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 5

def index_manager=(value)
  @index_manager = value
end

Instance Method Details

#[](type) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 19

def [] type
  @tables[type] ||= @db[type]
end

#close ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 36

def close
  @tables.clear
  @db.disconnect
end

#generate(generator_name) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 23

def generate generator_name
  generator_name = generator_name.to_s
  @db.transaction do 
    unless row = @metadata[:key => generator_name]
      @metadata << {:key => generator_name, :value => "0"}
      row = @metadata[:key => generator_name]
    end
    id = @metadata[:key => generator_name.to_s][:value].to_i
    @metadata.filter(:key => generator_name).update(:value => (id + 1).to_s)
    return id.to_s
  end
end

#print(name = nil) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 45

def print name = nil
  @index_manager.indexes.values.each{|index| index.print_storage name}
end

#transaction(&b) ⇒ Object 



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# File 'lib/ObjectModel/Indexes/IndexStorage.rb', line 41

def transaction &b
  @db.transaction &b
end