Moneta and KVS samples.

daybreak-read.rb

# -*- coding: utf-8-unix -*-
require 'daybreak'

include Daybreak

def show_db
  db = DB.new('tmp/daybreak')
  puts "Hello " + db["Hello"]
  puts "It " + db["It"]
  puts "See " + db["See"]
ensure
  db.close unless db.nil?
end

show_db

daybreak-write.rb

# -*- coding: utf-8-unix -*-
require 'daybreak'

include Daybreak

def make_db
  db = DB.new('tmp/daybreak')
  db.clear
  db["Hello"] = "there"
  db["It"] = "works"
  db["See"] = "you"
ensure
  db.close unless db.nil?
end

make_db

kyotocabinet-read.rb

# -*- mode: ruby; coding: utf-8-unix -*-
require 'kyotocabinet'

include KyotoCabinet

def show_db
  db = DB.new
  db.open('tmp/kc.kch', DB::OREADER)
  puts "Hello " + db["Hello"]
  puts "It " + db["It"]
  puts "See " + db["See"]
ensure
  db.close unless db.nil?
end

show_db

kyotocabinet-write.rb

# -*- mode: ruby; coding: utf-8-unix -*-
require 'kyotocabinet'

include KyotoCabinet

def make_db
  db = DB.new
  db.open('tmp/kc.kch', DB::OWRITER | DB::OCREATE)
  db.clear
  db["Hello"] = "there"
  db["It"] = "works"
  db["See"] = "you"
ensure
  db.close unless db.nil?
end

make_db

leveldb-read.rb

# -*- coding: utf-8-unix -*-
require 'leveldb'

include LevelDB

def show_db
  db = DB.new("tmp/leveldb")
  puts "Hello " + db["Hello"]
  puts "It " + db["It"]
  puts "See " + db["See"]
ensure
  db.close unless db.nil?
end

show_db

leveldb-write.rb

# -*- coding: utf-8-unix -*-
require 'leveldb'

include LevelDB

def make_db
  db = DB.new("tmp/leveldb")
  db.each{|k, v| db.delete(k)}
  db["Hello"] = "there"
  db["It"] = "works"
  db["See"] = "you"
ensure
  db.close unless db.nil?
end

make_db

moneta-read.rb

# -*- mode: ruby; coding: utf-8-unix -*-
require 'moneta'

STORE = {
  PStore: {file: "tmp/pstore"},
  Daybreak: {file: "tmp/daybreak"},
  KyotoCabinet: {file: "tmp/kc.kch"},
  LevelDB: {dir: "tmp/leveldb"}
}

def show_db(store_type)
  store = Moneta.new(store_type, STORE[store_type])
  puts "Hello " + store["Hello"]
  puts "It " + store["It"]
  puts "See " + store["See"]
ensure
  store.close unless store.nil?
end

if ARGV[0].nil?
  puts "Usage: ruby #{__FILE__} [#{STORE.keys.join('|')}]"
else
  show_db ARGV[0].to_sym
end

moneta-write.rb

# -*- mode: ruby; coding: utf-8-unix -*-
require 'moneta'

STORE = {
  PStore: {file: "tmp/pstore"},
  Daybreak: {file: "tmp/daybreak"},
  KyotoCabinet: {file: "tmp/kc.kch"},
  LevelDB: {dir: "tmp/leveldb"}
}

def make_db(store_type)
  store = Moneta.new(store_type, STORE[store_type])
  store.clear
  store["Hello"] = "there"
  store["It"] = "works"
  store["See"] = "you"
ensure
  store.close unless store.nil?
end

if ARGV[0].nil?
  puts "Usage: ruby #{__FILE__} [#{STORE.keys.join('|')}]"
else
  make_db ARGV[0].to_sym
end

pstore-read.rb

# -*- coding: utf-8-unix -*-
require 'pstore'

def show_db
  db = PStore.new('tmp/pstore')
  db.transaction do
    puts "Hello " + db["Hello"]
    puts "It " + db["It"]
    puts "See " + db["See"]
  end
end

show_db

pstore-write.rb

# -*- mode: ruby; coding: utf-8-unix -*-
require 'pstore'

def make_db
  db = PStore.new('tmp/pstore')
  db.transaction do
    db["Hello"] = "there"
    db["It"] = "works"
    db["See"] = "you"
  end
end

make_db