= rufus-tokyo

ruby-ffi based interface to Tokyo Cabinet and Tokyo Tyrant.

The 'abstract' and the 'table' API are covered for now.


== installation

  sudo gem install rufus-tokyo

  (see after 'usage' for how to install Tokyo Cabinet (and Tyrant) if required)


== Rufus::Edo

Note : Rufus::Tokyo focuses on leveraging Hirabayashi-san's C libraries via ruby-ffi, but the gem rufus-tokyo also contains Rufus::Edo which wraps the Tokyo Cabinet/Tyrant author's [native] C bindings :

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


== usage

hereafter TC references Tokyo Cabinet, while TT references Tokyo Tyrant.

the rdoc is at http://rufus.rubyforge.org/rufus-tokyo/


== version [mis]match

this version of rufus-tokyo works with

  ruby 1.8.6
  ruby 1.9.1p0
  jruby 1.1.6
  jruby 1.2.0

  TC 1.4.9 and TT 1.1.16
  TC 1.4.10 and TT 1.1.17 (adds the offset arg to query.limit)
  TC 1.4.11 and TT 1.1.18
  TC 1.4.13 and TT 1.1.22 (added query.count)

  tc-ruby 1.20 and tt-ruby 1.3 (Rufus::Edo)
  tc-ruby 1.21 and tt-ruby 1.5 (Rufus::Edo)


=== TC Abstract API

http://tokyocabinet.sourceforge.net/spex-en.html#tcadbapi

to create a hash (file named 'data.tch')

  require 'rubygems'
  require 'rufus/tokyo'

  db = Rufus::Tokyo::Cabinet.new('data.tch')

  db['nada'] = 'surf'

  p db['nada'] # => 'surf'
  p db['lost'] # => nil

  5000.times { |i| db[i.to_s] = "x" }

  p db.inject { |r, (k, v)| k } # => 4999

  db.close


=== TC Table API

http://tokyocabinet.sourceforge.net/spex-en.html#tctdbapi

  require 'rubygems'
  require 'rufus/tokyo'

  t = Rufus::Tokyo::Table.new('table.tct')

  t['pk0'] = { 'name' => 'alfred', 'age' => '22' }
  t['pk1'] = { 'name' => 'bob', 'age' => '18' }
  t['pk2'] = { 'name' => 'charly', 'age' => '45' }
  t['pk3'] = { 'name' => 'doug', 'age' => '77' }
  t['pk4'] = { 'name' => 'ephrem', 'age' => '32' }

  p t.query { |q|
    q.add_condition 'age', :numge, '32'
    q.order_by 'age'
  }
    # => [ {"name"=>"ephrem", :pk=>"pk4", "age"=>"32"},
    #      {"name"=>"charly", :pk=>"pk2", "age"=>"45"} ]

  t.close

Note that the Tokyo Cabinet Table API does support transactions :

  p t.size
    # => 0

  t.transaction do
    t['pk0'] = { 'name' => 'alfred', 'age' => '22' }
    t['pk1'] = { 'name' => 'bob', 'age' => '18' }
    t.abort
  end

  p t.size
    # => 0


=== TT remote db

http://tokyocabinet.sourceforge.net/tyrantdoc/

to start a ttserver (backed by a hash), on the command line

  ttserver -port 45001 data.tch


then, in Ruby :

  require 'rubygems'
  require 'rufus/tokyo/tyrant'

  db = Rufus::Tokyo::Tyrant.new('localhost', 45001)

  db['nada'] = 'surf'

  p db['nada'] # => 'surf'
  p db['lost'] # => nil

  db.close


Rufus::Tokyo::Tyrant instances have a #stat method :

  puts db.stat.inject('') { |s, (k, v)| s << "#{k} => #{v}\n" }
    # =>
    #   pid => 7566
    #   loadavg => 0.398438
    #   size => 528736
    #   rnum => 0
    #   time => 1234764065.305923
    #   sid => 898521513
    #   type => hash
    #   bigend => 0
    #   ru_sys => 3.398698
    #   version => 1.1.15
    #   ru_user => 2.155215
    #   ru_real => 3218.451152
    #   fd => 7


Note that it's also OK to make a Tokyo Tyrant server listen on a unix socket :

  ttserver -host /tmp/ttsocket -port 0 data.tch

and then :

  require 'rubygems'
  require 'rufus/tokyo/tyrant'
  db = Rufus::Tokyo::Tyrant.new('/tmp/ttsocket')
  db['a'] = 'alpha'
  db.close


=== TT remote table

to start a ttserver (backed by a table), on the command line :

  ttserver -port 45002 data.tct


then, in Ruby, much like a local table :

  require 'rubygems'
  require 'rufus/tokyo/tyrant'

  t = Rufus::Tokyo::TyrantTable.new('localhost', 45002)

  t['pk0'] = { 'name' => 'alfred', 'age' => '22' }
  t['pk1'] = { 'name' => 'bob', 'age' => '18' }
  t['pk2'] = { 'name' => 'charly', 'age' => '45' }
  t['pk3'] = { 'name' => 'doug', 'age' => '77' }
  t['pk4'] = { 'name' => 'ephrem', 'age' => '32' }

  p t.query { |q|
    q.add_condition 'age', :numge, '32'
    q.order_by 'age'
  }
    # => [ {"name"=>"ephrem", :pk=>"pk4", "age"=>"32"},
    #      {"name"=>"charly", :pk=>"pk2", "age"=>"45"} ]

  t.close


Rufus::Tokyo::TyrantTable instances have a #stat method :

  puts t.stat.inject('') { |s, (k, v)| s << "#{k} => #{v}\n" }
    # =>
    #   pid => 7569
    #   loadavg => 0.295410
    #   size => 935792
    #   rnum => 0
    #   time => 1234764228.942014
    #   sid => 1027604232
    #   type => table
    #   bigend => 0
    #   ru_sys => 5.966750
    #   version => 1.1.15
    #   ru_user => 2.601947
    #   ru_real => 3382.084479
    #   fd => 10


Note that it's also OK to make a Tokyo Tyrant server listen on a unix socket :

  ttserver -host /tmp/tttsocket -port 0 data.tct

and then :

  require 'rubygems'
  require 'rufus/tokyo/tyrant'
  t = Rufus::Tokyo::TyrantTable.new('/tmp/tttsocket')
  t['customer0'] = { 'name' => 'Heike no Kyomori', 'age' => '75' }
  t.close


== rdoc

more in the rdoc

  http://rufus.rubyforge.org/rufus-tokyo/
  http://rufus.rubyforge.org/rufus-tokyo/classes/Rufus/Tokyo/Cabinet.html
  http://rufus.rubyforge.org/rufus-tokyo/classes/Rufus/Tokyo/Table.html
  http://rufus.rubyforge.org/rufus-tokyo/classes/Rufus/Tokyo/Tyrant.html
  http://rufus.rubyforge.org/rufus-tokyo/classes/Rufus/Tokyo/TyrantTable.html

don't hesitate to "man ttserver" on the command line.

or directly in the source

  http://github.com/jmettraux/rufus-tokyo/blob/master/lib/rufus/tokyo/cabinet/abstract.rb
  http://github.com/jmettraux/rufus-tokyo/blob/master/lib/rufus/tokyo/cabinet/table.rb
  http://github.com/jmettraux/rufus-tokyo/blob/master/lib/rufus/tokyo/tyrant/abstract.rb
  http://github.com/jmettraux/rufus-tokyo/blob/master/lib/rufus/tokyo/tyrant/table.rb


== Tokyo Cabinet / Tyrant install

a compilation of notes is available at :

  http://openwferu.rubyforge.org/tokyo.html


== dependencies

the ruby gem 'ffi'


== mailing list

On the rufus-ruby list :

  http://groups.google.com/group/rufus-ruby


== issue tracker

  http://rubyforge.org/tracker/?atid=18584&group_id=4812&func=browse


== irc

irc.freenode.net #ruote


== source

http://github.com/jmettraux/rufus-tokyo

  git clone git://github.com/jmettraux/rufus-tokyo.git


== credits

many thanks to the author of Tokyo Cabinet, Mikio Hirabayashi, and to the authors of ruby-ffi

  http://tokyocabinet.sourceforge.net
  http://kenai.com/projects/ruby-ffi


== authors

John Mettraux, jmettraux@gmail.com, http://jmettraux.wordpress.com
Zev Blut, http://www.iknow.co.jp/users/zev


== the rest of Rufus

http://rufus.rubyforge.org


== license

MIT