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| | # -*- encoding: binary -*-
require 'tdb'
module Metropolis::TDB
include Metropolis::Common
autoload :Single, 'metropolis/tdb/single'
autoload :Multi, 'metropolis/tdb/multi'
def setup(opts)
super
@rbuf = ""
@tdb_opts = { :tdb_flags => 0 }
if @readonly
@tdb_opts[:open_flags] = IO::RDONLY
extend Metropolis::Common::RO
end
if @query
size = @query['hash_size'] and @tdb_opts[:hash_size] = size.to_i
hash = @query['hash'] and @tdb_opts[:hash] = hash.to_sym
case @query['volatile']
when 'true'; @tdb_opts[:tdb_flags] |= TDB::VOLATILE
when 'false', nil
else
raise ArgumentError, "'volatile' must be 'true' or 'false'"
end
case @query['sync']
when 'true', nil
when 'false'; @tdb_opts[:tdb_flags] |= TDB::NOSYNC
else
raise ArgumentError, "'sync' must be 'true' or 'false'"
end
end
extend(@path_pattern ? Metropolis::TDB::Multi : Metropolis::TDB::Single)
end
def put(key, env)
value = env[Rack_Input].read
db(key) do |tdb|
case env[HTTP_X_TT_PDMODE]
when "1"
# TODO: make this atomic
return r(409) if tdb.include?(key)
when "2"
value = (tdb.get(key) || "") << value
end
tdb.store(key, value)
end
r(201)
end
def delete(key)
r(db(key) { |tdb| tdb.nuke!(key) } ? 200 : 404)
end
def get(key, env)
value = db(key) { |tdb| tdb.fetch(key, @rbuf) } or return r(404)
[ 200, { Content_Length => value.size.to_s }.merge!(@headers), [ value ] ]
end
end
|