Included Modules

Rufus::Tokyo::CabinetConfig, Rufus::Edo::TableCore

Rufus::Edo::Table wraps Hirabayashi-san’s Ruby bindings for Tokyo Cabinet tables.

This class has the exact same methods as Rufus::Tokyo::Table. It’s faster though. The advantage of Rufus::Tokyo::Table lies in that in runs on Ruby 1.8, 1.9 and JRuby.

You need to have Hirabayashi-san’s binding installed to use this Rufus::Edo::Table :

  http://github.com/jmettraux/rufus-tokyo/tree/master/lib/rufus/edo

Example usage :

  require 'rufus/edo'
  db = Rufus::Edo::Table.new('data.tct')
  db['customer1'] = { 'name' => 'Taira no Kyomori', 'age' => '55' }
  # ...
  db.close

Constants Included from Rufus::Tokyo::CabinetConfig

CABINET_SUFFIXES, CABINET_TYPES

Constants Included from Rufus::Edo::TableCore

INDEX_TYPES, META_TYPES

Constructor Summary

public initialize(path, params = {})

Initializes and open a table.

db = Rufus::Edo::Table.new(‘data.tct’)

  # or

db = Rufus::Edo::Table.new(‘data’, :type => :table)

  # or

db = Rufus::Edo::Table.new(‘data’)

parameters

There are two ways to pass parameters at the opening of a db :

  db = Rufus::Edo::Table.new('data.tct#opts=ld#mode=w') # or
  db = Rufus::Edo::Table.new('data.tct', :opts => 'ld', :mode => 'w')

mode

  * :mode    a set of chars ('r'ead, 'w'rite, 'c'reate, 't'runcate,
             'e' non locking, 'f' non blocking lock), default is 'wc'

other parameters

  * :opts    a set of chars ('l'arge, 'd'eflate, 'b'zip2, 't'cbs)
             (usually empty or something like 'ld' or 'lb')

  * :bnum    number of elements of the bucket array
  * :apow    size of record alignment by power of 2 (defaults to 4)
  * :fpow    maximum number of elements of the free block pool by
             power of 2 (defaults to 10)

  * :rcnum   specifies the maximum number of records to be cached.
             If it is not more than 0, the record cache is disabled.
             It is disabled by default.
  * :lcnum   specifies the maximum number of leaf nodes to be cached.
             If it is not more than 0, the default value is specified.
             The default value is 2048.
  * :ncnum   specifies the maximum number of non-leaf nodes to be
             cached. If it is not more than 0, the default value is
             specified. The default value is 512.

  * :dfunit  unit step number. If it is not more than 0,
             the auto defragmentation is disabled. (Since TC 1.4.21)

NOTE :

On reopening a file, Cabinet will tend to stick to the parameters as set when the file was opened. To change that, have a look at the man pages of the various command line tools coming with Tokyo Cabinet.

[View source]

    
      
        
          

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          # File 'lib/rufus/edo/cabinet/table.rb', line 110

def initialize (path, params={})

  conf = determine_conf(path, params, :table)

  @db = TokyoCabinet::TDB.new

  #
  # tune

  @db.tune(conf[:bnum], conf[:apow], conf[:fpow], conf[:opts])

  #
  # set cache

  @db.setcache(conf[:rcnum], conf[:lcnum], conf[:ncnum])

  #
  # set xmsiz

  @db.setxmsiz(conf[:xmsiz])

  #
  # set dfunit (TC > 1.4.21)

  @db.setdfunit(conf[:dfunit]) if @db.respond_to?(:setdfunit)

  #
  # open

  @path = conf[:path]

  @db.open(@path, conf[:mode]) || raise_error
end

        
      

  

Public Visibility

Public Instance Method Summary

#path	Returns the path to this table.

Public Instance Methods Included from Rufus::Edo::TableCore

[]=, clear, close, delete, delete_keys_with_prefix, difference, generate_unique_id, intersection, keys, lget, original, prepare_query, query, query_delete, search, set_index, size, tranabort, tranbegin, trancommit, union

Public Instance Method Details

path

public path

Returns the path to this table.