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|
#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
#
module EvenDoors
#
class Particle
#
def initialize
@ts = Time.now # creation time
@src = nil # Spot where it's originated from
@dst = nil # Spot where it's heading to
@room = nil # Room path part of the current destination
@door = nil # Door path part of the current destination
@action = nil # action part of the current destination
@link_value = nil # the value computed with the link_fields values extracted from the payload
# used for pearing Particles in Boards and linking in routing process
@dsts = [] # fifo of path?action strings where to travel to
@link_fields = [] # the fields used to generate the link value
@payload = {} # the actual data carried by this particle
@merged = [] # list of merged particles
end
#
def reset!
@ts = Time.now
@src = @dst = @room = @door = @action = @link_value = nil
@dsts.clear
@link_fields.clear
@payload.clear
@merged.clear
end
#
attr_accessor :src
attr_reader :ts, :dst, :room, :door, :action, :link_value, :payload
#
# routing
#
def next_dst
@dsts[0]
end
#
def clear_dsts!
@dsts.clear
end
#
def add_dsts paths
paths.split(EvenDoors::LINK_SEP).each do |path|
@dsts << path.sub(/^\/+/,'').sub(/\/+$/,'').gsub(/\/{2,}/,'/')
end
end
#
def set_dst! a, d=nil
@dst = @room = @door = @action = nil
clear_dsts!
@dsts << ( d ? d.sub(/^\/+/,'').sub(/\/+$/,'').gsub(/\/{2,}/,'/') : '' )+EvenDoors::ACT_SEP+a.to_str
end
#
def split_dst!
@dst = nil
p, @action = next_dst.split EvenDoors::ACT_SEP
i = p.rindex EvenDoors::PATH_SEP
if i.nil?
@room = nil
@door = p
else
@room = p[0..i-1]
@door = p[i+1..-1]
end
@door = nil if @door.empty?
end
#
def dst_routed! dst
@dst = dst
@dsts.shift
end
#
def error! e, dst=nil
@action = EvenDoors::ACT_ERROR
@dst = dst||@src
@payload[EvenDoors::ERROR_FIELD]=e
end
#
def apply_link! lnk
@src = lnk.door
clear_dsts!
add_dsts lnk.dsts
set_link_fields lnk.fields
end
#
# data manipulation
#
def []= k, v
@payload[k]=v
compute_link_value! if @link_fields.include? k
end
#
def set_data k, v
@payload[k] = v
compute_link_value! if @link_fields.include? k
end
#
def [] k
@payload[k]
end
#
def get_data k
@payload[k]
end
alias :data :get_data
#
def clone_data p
@payload = p.payload.clone
end
#
# link value and fields
#
def set_link_fields *args
@link_fields.clear if not @link_fields.empty?
args.compact!
args.each do |lfs|
lfs.split(',').each do |lf|
@link_fields << lf
end
end
compute_link_value!
end
#
def compute_link_value!
@link_value = @link_fields.inject('') { |s,lf| s+=@payload[lf].to_s if @payload[lf]; s }
end
#
# merge particles management
#
def merge! p
@merged << p
end
#
def merged i
@merged[i]
end
#
def merged_shift
@merged.shift
end
#
def clear_merged!
@merged.clear
end
#
end
#
end
#
# EOF
|
