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|
#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
#
# Copyright 2012 Jérémy Zurcher <jeremy@asynk.ch>
#
# This file is part of iotas.
#
# iotas is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# iotas is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with iotas. If not, see <http://www.gnu.org/licenses/>.
#
module Iotas
#
ERROR_ROUTE_NS = 'routing error: no source'.freeze
ERROR_ROUTE_RRWD = 'routing error: right room, wrong door'.freeze
ERROR_ROUTE_DDWR = 'routing error: drill down, wrong room'.freeze
ERROR_ROUTE_TRWR = 'routing error: top room, wrong room'.freeze
ERROR_ROUTE_NDNL = 'routing error: no destination, no link'.freeze
ERROR_ROUTE_SND = 'routing error: system no destination'.freeze
#
class Room < Iota
#
def initialize n, p
super n, p
@iotas = {}
@links = {}
end
#
def to_json *a
{
'kls' => self.class.name,
'name' => @name,
'iotas' => @iotas,
'links' => @links
}.to_json *a
end
#
def self.json_create o
raise Iotas::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
room = self.new o['name'], o['parent']
o['iotas'].each do |name,iota|
eval( iota['kls'] ).json_create(iota.merge!('parent'=>room))
end
o['links'].each do |src,links|
links.each do |link|
room.add_link Iotas::Link.json_create(link)
end
end
room
end
#
def add_iota s
raise Iotas::Exception.new "Iota #{s.name} already has #{s.parent.name} as parent" if not s.parent.nil? and s.parent!=self
raise Iotas::Exception.new "Iota #{s.name} already exists in #{path}" if @iotas.has_key? s.name
s.parent = self if s.parent.nil?
@iotas[s.name]=s
end
#
def add_link l
l.door = @iotas[l.src]
raise Iotas::Exception.new "Link source #{l.src} does not exist in #{path}" if l.door.nil?
(@links[l.src] ||= [])<< l
end
#
def start!
puts " * start #{path}" if @spin.debug_routing
@iotas.values.each do |iota| iota.start! end
end
#
def stop!
puts " * stop #{path}" if @spin.debug_routing
@iotas.values.each do |iota| iota.stop! end
end
#
def search_down spath
return self if spath==path
return nil if (spath=~/^#{path}\/(\w+)\/?/)!=0
if iota = @iotas[$1]
return iota if iota.path==spath # needed as Door doesn't implement #search_down
return iota.search_down spath
end
nil
end
#
def try_links p
puts " -> try_links ..." if @spin.debug_routing
links = @links[p.src.name]
return false if links.nil?
pending_link = nil
apply_link = false
links.each do |link|
apply_link = link.cond_fields.nil? # unconditional link
p.set_link_fields link.cond_fields if not apply_link
if apply_link or (p.link_value==link.cond_value)
# link matches !
if pending_link
p2 = @spin.require_p p.class
p2.clone_data p
p2.apply_link! link
send_p p2
end
pending_link = link
end
end
if pending_link
p.apply_link! pending_link
send_p p
end
(not pending_link.nil?)
end
#
def route_p p
if p.room.nil? or p.room==path
if door = @iotas[p.door]
p.dst_routed! door
else
p.error! Iotas::ERROR_ROUTE_RRWD
end
elsif (p.room=~/^#{path}\/(.*)/)==0
room, *more = $1.split Iotas::PATH_SEP
if child=@iotas[room]
child.route_p p
else
p.error! Iotas::ERROR_ROUTE_DDWR
end
elsif @parent
@parent.route_p p
else
p.error! Iotas::ERROR_ROUTE_TRWR
end
end
#
def send_p p
puts " * send_p #{(p.next_dst.nil? ? 'no dst' : p.next_dst)} ..." if @spin.debug_routing
if p.src.nil?
# do not route orphan particles !!
p.error! Iotas::ERROR_ROUTE_NS, @spin
elsif p.next_dst
p.split_dst!
if p.door
route_p p
else
# boomerang
p.dst_routed! p.src
end
elsif try_links p
return
else
p.error! Iotas::ERROR_ROUTE_NDNL
end
puts " -> #{p.dst.path}#{Iotas::ACT_SEP}#{p.action}" if @spin.debug_routing
@spin.post_p p
end
#
def send_sys_p p
puts " * send_sys_p #{(p.next_dst.nil? ? 'no dst' : p.next_dst)} ..." if @spin.debug_routing
if p.next_dst
p.split_dst!
if p.door
route_p p
elsif p.action
p.dst_routed! @spin
end
else
p.error! Iotas::ERROR_ROUTE_SND
end
puts " -> #{p.dst.path}#{Iotas::ACT_SEP}#{p.action}" if @spin.debug_routing
@spin.post_sys_p p
end
#
def process_sys_p p
if p.action==Iotas::SYS_ACT_ADD_LINK
add_link Iotas::Link.from_particle_data p
end
@spin.release_p p
end
#
end
#
end
#
# EOF
|
