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Name	Size	Permission
memcached	[ DIR ]	drwxr-xr-x
mongo	[ DIR ]	drwxr-xr-x
activerecord.rb	4.47 KB	-rw-r--r--
cassandra.rb	3.37 KB	-rw-r--r--
client.rb	2.05 KB	-rw-r--r--
cookie.rb	967 B	-rw-r--r--
couch.rb	3.85 KB	-rw-r--r--
datamapper.rb	2.34 KB	-rw-r--r--
daybreak.rb	1.17 KB	-rw-r--r--
dbm.rb	615 B	-rw-r--r--
file.rb	3.18 KB	-rw-r--r--
fog.rb	1.54 KB	-rw-r--r--
gdbm.rb	606 B	-rw-r--r--
hbase.rb	3.06 KB	-rw-r--r--
leveldb.rb	929 B	-rw-r--r--
lmdb.rb	2.17 KB	-rw-r--r--
localmemcache.rb	766 B	-rw-r--r--
lruhash.rb	2.69 KB	-rw-r--r--
memcached.rb	385 B	-rw-r--r--
memory.rb	450 B	-rw-r--r--
mongo.rb	225 B	-rw-r--r--
null.rb	668 B	-rw-r--r--
pstore.rb	1.97 KB	-rw-r--r--
redis.rb	2.35 KB	-rw-r--r--
restclient.rb	1.31 KB	-rw-r--r--
riak.rb	1.69 KB	-rw-r--r--
sdbm.rb	606 B	-rw-r--r--
sequel.rb	3.74 KB	-rw-r--r--
sqlite.rb	2.68 KB	-rw-r--r--
tdb.rb	609 B	-rw-r--r--
tokyocabinet.rb	1.38 KB	-rw-r--r--
tokyotyrant.rb	3.24 KB	-rw-r--r--
yaml.rb	238 B	-rw-r--r--

Code Editor : lmdb.rb

require 'lmdb'
require 'fileutils'

module Moneta
  module Adapters
    # LMDB backend
    # @api public
    class LMDB
      include Defaults

supports :create, :increment
      attr_reader :backend, :db

PUT_FLAGS = [:nooverwrite, :nodupdata, :current, :append, :appenddup]

# @param [Hash] options
      # @option options [String] :dir Environment directory
      # @option options [::LMDB::Environment] :backend Use existing backend instance
      # @option options [String or nil] :db Database name
      def initialize(options)
        db = options.delete(:db)
        @backend = options.delete(:backend) ||
          begin
            raise ArgumentError, 'Option :dir is required' unless dir = options.delete(:dir)
            FileUtils.mkpath(dir)
            ::LMDB.new(dir, options)
          end

@db = @backend.database(db, create: true)
      end

# (see Proxy#key?)
      def key?(key, options = {})
        !@db.get(key).nil?
      end

# (see Proxy#load)
      def load(key, options = {})
        @db.get(key)
      end

# (see Proxy#store)
      def store(key, value, options = {})
        @db.put(key, value, Utils.only(options, *PUT_FLAGS))
        value
      end

# (see Proxy#delete)
      def delete(key, options = {})
        @backend.transaction do
          if value = @db.get(key)
            @db.delete(key)
            value
          end
        end
      end

# (see Proxy#clear)
      def clear(options = {})
        @db.clear
        self
      end

# (see Proxy#increment)
      def increment(key, amount = 1, options = {})
        @backend.transaction do
          value = @db.get(key)
          value = Utils.to_int(value) + amount
          @db.put(key, value.to_s, Utils.only(options, *PUT_FLAGS))
          value
        end
      end

# (see Defaults#create)
      def create(key, value, options = {})
        @backend.transaction do
          if @db.get(key)
            false
          else
            @db.put(key, value, Utils.only(options, *PUT_FLAGS))
            true
          end
        end
      end

# (see Proxy#close)
      def close
        @backend.close
        nil
      end
    end
  end
end

${this.title}

Code Editor : lmdb.rb