Merge branch 'rewrite0'

7 files changed, 513 insertions, 103 deletions

diff --git a/lib/edoors/board.rb b/lib/edoors/board.rb
index f845dcd..990d312 100644
--- a/lib/edoors/board.rb
+++ b/lib/edoors/board.rb
@@ -25,11 +25,20 @@ module Edoors
     #
     class Board < Door
         #
+        # creates a Board object from the arguments.
+        #
+        # @param [String] n the name of this Board
+        # @param [Iota] p the parent
+        #
         def initialize n, p
             super n, p
             @postponed = {}
         end
         #
+        # called by JSON#generate to serialize the Board object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
+        #
         def to_json *a
             {
                 'kls'       => self.class.name,
@@ -38,6 +47,12 @@ module Edoors
             }.merge(hibernate!).to_json *a
         end
         #
+        # creates a Board object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
             board = self.new o['name'], o['parent']
@@ -48,6 +63,10 @@ module Edoors
             board
         end
         #
+        # process the given particle then forward it to user code
+        #
+        # @param [Particle] p the Particle to be processed
+        #
         def process_p p
             @viewer.receive_p p if @viewer
             if p.action!=Edoors::ACT_ERROR
diff --git a/lib/edoors/door.rb b/lib/edoors/door.rb
index 848c1b5..beb42ab 100644
--- a/lib/edoors/door.rb
+++ b/lib/edoors/door.rb
@@ -23,11 +23,20 @@ module Edoors
     #
     class Door < Iota
         #
+        # creates a Door object from the arguments.
+        #
+        # @param [String] n the name of this Door
+        # @param [Iota] p the parent
+        #
         def initialize n, p
             super n, p
             @saved = nil
         end
         #
+        # called by JSON#generate to serialize the Door object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
+        #
         def to_json *a
             {
                 'kls'   => self.class.name,
@@ -35,6 +44,12 @@ module Edoors
             }.merge(hibernate!).to_json *a
         end
         #
+        # creates a Door object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
             door = self.new o['name'], o['parent']
@@ -42,23 +57,37 @@ module Edoors
             door
         end
         #
-        def require_p p_kls
+        # require a Particle of the given class
+        #
+        # @param [Class] p_kls the class of the desired Particle
+        #
+        def require_p p_kls=Edoors::Particle
             @spin.require_p p_kls
         end
         #
+        # release the given Particle
+        #
+        # @param [Particle] p the Particle to be released
+        #
         def release_p p
             @saved=nil if @saved==p     # particle is released, all is good
             @spin.release_p p
         end
         #
+        # release the Particle that have not been released or sent by user code
+        #
         def _garbage
-            puts " ! #{path} didn't give back #{@saved}" if @spin.debug_errors
+            puts " ! #{path} didn't give back #{@saved}" if @spin.debug_garbage
             puts "\t#{@saved.data Edoors::FIELD_ERROR_MSG}" if @saved.action==Edoors::ACT_ERROR
             @spin.release_p @saved
             @saved = nil
         end
         private :_garbage
         #
+        # process the given particle then forward it to user code
+        #
+        # @param [Particle] p the Particle to be processed
+        #
         def process_p p
             @viewer.receive_p p if @viewer
             @saved = p
@@ -66,12 +95,24 @@ module Edoors
             _garbage if not @saved.nil?
         end
         #
+        # dead end, for now user defined Door do not have to deal with system Particle
+        # the Particle is released
+        #
+        # @param [Particle] p the Particle to deal with
+        #
         def process_sys_p p
             # nothing todo with it now
             @spin.release_p p
         end
         #
-        def _send sys, p, a=nil, d=nil
+        # send the given Particle through the direct @parent
+        #
+        # @param [Particle] p the Particle to be sent
+        # @param [Boolean] sys if true send to system Particle fifo
+        # @param [String] a the post action
+        # @param [Iota] d the post destination
+        #
+        def _send p, sys, a, d
             p.init! self
             p.set_dst! a, d||self if a
             @saved=nil if @saved==p # particle is sent back the data, all is good
@@ -80,12 +121,28 @@ module Edoors
         end
         private :_send
         #
+        # send the given Particle to the application Particle fifo
+        #
+        # @param [Particle] p the Particle to be sent
+        # @param [String] a the post action
+        # @param [Iota] d the post destination
+        #
+        # @see Door#_send real implementation
+        #
         def send_p p, a=nil, d=nil
-            _send false, p, a, d
+            _send p, false, a, d
         end
         #
+        # send the given Particle to the system Particle fifo
+        #
+        # @param [Particle] p the Particle to be sent
+        # @param [String] a the post action
+        # @param [Iota] d the post destination
+        #
+        # @see Door#_send real implementation
+        #
         def send_sys_p p, a=nil, d=nil
-            _send true, p, a, d
+            _send p, true, a, d
         end
         #
     end
diff --git a/lib/edoors/iota.rb b/lib/edoors/iota.rb
index fcf7573..e63aca0 100644
--- a/lib/edoors/iota.rb
+++ b/lib/edoors/iota.rb
@@ -25,6 +25,14 @@ module Edoors
     #
     class Iota
         #
+        # creates a Iota object from the arguments.
+        #
+        # @param [String] n the name of this Iota
+        # @param [Iota] p the parent
+        #
+        # @see Room#add_iota adds itself to it's parent children list
+        # @see Spin#add_to_world adds itself to @spin's world
+        #
         def initialize n, p
             raise Edoors::Exception.new "Iota name #{n} is not valid" if n.include? Edoors::PATH_SEP
             @name   = n     # unique in it's room
@@ -41,23 +49,31 @@ module Edoors
         attr_reader :name, :path, :spin
         attr_accessor :viewer, :parent
         #
+        # override this to initialize your object on system start
+        #
         def start!
-            # override this to initialize your object on system start
         end
         #
+        # override this to initialize your object on system stop
+        #
         def stop!
-            # override this to initialize your object on system stop
         end
         #
+        # override this to save your object state on hibernate
+        # #
         def hibernate!
-            # override this to save your object state on hibernate
             {}
         end
         #
+        # override this to restore your object state on resume
+        #
         def resume! o
-            # override this to restore your object state on resume
         end
         #
+        # has to be override, used by user side code
+        #
+        # @raise NoMethodError
+        #
         def receive_p p
             raise NoMethodError.new "receive_p(p) must be overridden"
         end
diff --git a/lib/edoors/link.rb b/lib/edoors/link.rb
index b6a3fb9..ede2cd4 100644
--- a/lib/edoors/link.rb
+++ b/lib/edoors/link.rb
@@ -23,45 +23,65 @@ module Edoors
     #
     LNK_SRC     = 'edoors_lnk_src'.freeze
     LNK_DSTS    = 'edoors_lnk_dsts'.freeze
-    LNK_FIELDS  = 'edoors_lnk_fields'.freeze
-    LNK_CONDF   = 'edoors_lnk_condf'.freeze
-    LNK_CONDV   = 'edoors_lnk_condv'.freeze
+    LNK_KEYS    = 'edoors_lnk_keys'.freeze
+    LNK_VALUE   = 'edoors_lnk_value'.freeze
     #
     class Link
         #
-        def initialize src, dsts, fields=nil, cond_fields=nil, cond_value=nil
-            @src = src                      # link source name
-            @dsts = dsts                    # , separated destinations to apply to the particle on linking success
-            @fields = fields                # , separated fields to apply to the particle on linking success
-            @cond_fields = cond_fields      # , separated fields used to generate the link value with particle payload
-            @cond_value = cond_value        # value which will be compared to the particle link value to link or not
-            @door = nil                     # pointer to the source
+        # creates a Link object from the arguments.
+        #
+        # @param [String] src link source name
+        # @param [Array] dsts destinations to apply to the particle on linking success
+        # @param [Array] keys keys to apply as link_keys to the particle on linking success
+        # @param [Hash] value will be used to check linking with particles
+        #
+        # @see Room#_try_links try to apply links on a Particle
+        # @see Particle#link_with? linking test
+        #
+        def initialize src, dsts, keys=nil, value=nil
+            @src = src
+            @dsts = dsts
+            @keys = keys
+            @value = value
+            @door = nil         # pointer to the source set from @src by Room#add_link
         end
         #
+        # called by JSON#generate to serialize the Link object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
+        #
         def to_json *a
             {
-                'kls'           => self.class.name,
-                'src'           => @src,
-                'dsts'          => @dsts,
-                'fields'        => @fields,
-                'cond_fields'   => @cond_fields,
-                'cond_value'    => @cond_value
+                'kls'       => self.class.name,
+                'src'       => @src,
+                'dsts'      => @dsts,
+                'keys'      => @keys,
+                'value'     => @value
             }.to_json *a
         end
         #
+        # creates a Link object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
-            self.new o['src'], o['dsts'], o['fields'], o['cond_fields'], o['cond_value']
+            self.new o['src'], o['dsts'], o['keys'], o['value']
         end
         #
-        def self.from_particle_data p
-            Edoors::Link.new(p.get_data(Edoors::LNK_SRC), p.get_data(Edoors::LNK_DSTS),
-                                p.get_data(Edoors::LNK_FIELDS), p.get_data(Edoors::LNK_CONDF),
-                                p.get_data(Edoors::LNK_CONDV))
+        # creates a Link object from the data of a particle
+        #
+        # @param [Particle] p the Particle to get Link attributes from
+        #
+        def self.from_particle p
+            pl = p.payload
+            Edoors::Link.new pl[Edoors::LNK_SRC], pl[Edoors::LNK_DSTS], pl[Edoors::LNK_KEYS], pl[Edoors::LNK_VALUE]
         end
         #
         attr_accessor :door
-        attr_reader :src, :dsts, :fields, :cond_fields, :cond_value
+        attr_reader :src, :dsts, :keys, :value
         #
     end
     #
diff --git a/lib/edoors/particle.rb b/lib/edoors/particle.rb
index f659fbc..763c578 100644
--- a/lib/edoors/particle.rb
+++ b/lib/edoors/particle.rb
@@ -24,6 +24,33 @@ module Edoors
     #
     class Particle
         #
+        # creates a Particle object from the arguments.
+        #
+        # @param [Hash] o a customizable set of options
+        #
+        # @option o 'ts' [String]
+        #   creation time
+        # @option o 'src' [String]
+        #   Iota where it's originated from
+        # @option o 'dst' [String]
+        #   Iota where it's heading to
+        # @option o 'room' [String]
+        #   Room path part of the current destination
+        # @option o 'door' [String]
+        #   Door path part of the current destination
+        # @option o 'action' [String]
+        #   action part of the current destination
+        # @option o 'dsts' [String]
+        #   fifo of path?action strings where to travel to
+        # @option o 'link_keys' [String]
+        #   unordered keys used has payload keys to build link_value
+        # @option o 'payload' [String]
+        #   the data carried by this particle
+        # @option o 'merged' [String]
+        #   list of merged particles
+        #
+        # @see Spin#require_p require a Particle
+        #
         def initialize o={}
             @ts = Time.now      # creation time
             @src = nil          # Iota where it's originated from
@@ -31,11 +58,10 @@ module Edoors
             @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
+            @link_keys = []     # unordered keys used has payload keys to build link_value
+            @link_value = {}    # the payload keys and values corresponding to the link keys
+            @payload = {}       # the data carried by this particle
             @merged = []        # list of merged particles
             #
             if not o.empty?
@@ -46,77 +72,117 @@ module Edoors
                 @payload = o['payload']||{}
                 @src = o['spin'].search_down o['src'] if o['src']
                 @dst = o['spin'].search_down o['dst'] if o['dst']
-                o['dsts'].each do |dst| add_dsts dst end if o['dsts']
-                set_link_fields *o['link_fields'] if o['link_fields']
+                add_dsts *o['dsts'] if o['dsts']
+                set_link_keys *o['link_keys'] if o['link_keys']
                 o['merged'].each do |particle|
                     merge! Particle.json_create(particle.merge!('spin'=>o['spin']))
                 end if o['merged']
             end
         end
         #
+        # called by JSON#generate to serialize the Particle object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
+        #
         def to_json *a
             {
-                'kls'           => self.class.name,
-                'ts'            => @ts,
-                'src'           => (@src ? @src.path : nil ),
-                'dst'           => (@dst ? @dst.path : nil ),
-                'room'          => @room,
-                'door'          => @door,
-                'action'        => @action,
-                'dsts'          => @dsts,
-                'link_fields'   => @link_fields,
-                'payload'       => @payload,
-                'merged'        => @merged
+                'kls'       => self.class.name,
+                'ts'        => @ts,
+                'src'       => (@src ? @src.path : nil ),
+                'dst'       => (@dst ? @dst.path : nil ),
+                'room'      => @room,
+                'door'      => @door,
+                'action'    => @action,
+                'dsts'      => @dsts,
+                'link_keys' => @link_keys,
+                'payload'   => @payload,
+                'merged'    => @merged
             }.to_json *a
         end
         #
+        # creates a Particle object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
             self.new o
         end
         #
-        # called when released
+        # clears all attributes
+        #
+        # @see Spin#release_p called whe na Particle is released
+        #
         def reset!
             clear_merged! ( @src ? @src : ( @dst ? @dst : nil ) )
-            @ts = @src = @dst = @room = @door = @action = @link_value = nil
+            @ts = @src = @dst = @room = @door = @action = nil
             @dsts.clear
-            @link_fields.clear
+            @link_value.clear
+            @link_keys.clear
             @payload.clear
         end
         #
-        # called when sent
+        # sets @src, @ts, and reset others
+        #
+        # @see Particle#apply_link! called when a Link is applied
+        # @see Door#_send called when a Door sends a Particle
+        #
         def init! src
             @src = src
             @ts = Time.now
             @dst = @room = @door = @action = nil
         end
         #
-        attr_reader :ts, :src, :dst, :room, :door, :action, :link_value, :payload
+        attr_reader :ts, :src, :dst, :room, :door, :action, :payload, :link_value
         #
-        # routing
+        # returns the next destination
         #
         def next_dst
             @dsts[0]
         end
         #
+        # clears the destination list
+        #
         def clear_dsts!
             @dsts.clear
         end
         #
-        def add_dsts dsts
-            dsts.split(Edoors::LINK_SEP).each do |dst|
-                if dst.empty? or dst[0]==Edoors::PATH_SEP or dst[0]==Edoors::PATH_SEP  or dst=~/\/\?/\
-                    or dst=~/\/{2,}/ or dst=~/\s+/ or dst==Edoors::ACT_SEP
+        # adds destinations to the destination list
+        #
+        # @param [Array] dsts destinations to add
+        #
+        # @raise Edoors::Exception if a destination is not acceptable
+        #
+        # The parameters are checked before beeing added.
+        # they must not be empty or be '?' or start with '/'
+        # or contain '/?' or '//' or '\s+'
+        #
+        def add_dsts *dsts
+            dsts.each do |dst|
+                if dst.empty? or dst==Edoors::ACT_SEP or dst[0]==Edoors::PATH_SEP \
+                    or dst=~/\/\?/ or dst=~/\/{2,}/ or dst=~/\s+/
                     raise Edoors::Exception.new "destination #{dst} is not acceptable"
                 end
                 @dsts << dst
             end
         end
         #
+        # adds a destination to the destination list
+        #
+        # @param [String] a the action
+        # @param [String] d the destination
+        #
         def add_dst a, d=''
             add_dsts d+Edoors::ACT_SEP+a
         end
         #
+        # sets the current destination
+        #
+        # @param [String] a the action
+        # @param [String Iota] d the destination
+        #
         def set_dst! a, d
             @action = a
             if d.is_a? Edoors::Iota
@@ -127,6 +193,11 @@ module Edoors
             end
         end
         #
+        # splits the next destination into @room, @door, @action attributes
+        #
+        # the @dst attribute is set to nil
+        # the @room, @door, @action attributes are set to nil if not defined
+        #
         def split_dst!
             @dst = @room = @door = @action = nil
             return if (n = next_dst).nil?
@@ -134,6 +205,10 @@ module Edoors
             _split_path! p
         end
         #
+        # called by Particle#split_dst! to split the path part of the destination
+        #
+        # @param [String] p path to be splitted
+        #
         def _split_path! p
             i = p.rindex Edoors::PATH_SEP
             if i.nil?
@@ -147,81 +222,147 @@ module Edoors
         end
         private :_split_path!
         #
+        # sets the current destination and shift the head of destination list
+        #
+        # @param [Iota] dst the current destination
+        #
+        # @see Room#_route routing success
+        # @see Room#_send routing failure
+        #
         def dst_routed! dst
             @dst = dst
             @dsts.shift
         end
         #
+        # sets the error message, the destination and action
+        #
+        # @param [String] e error message
+        # @param [Iota] dst the destination, @src if nil
+        #
+        # the error message is set into @payload[[Edoors::FIELD_ERROR_MSG]
+        #
         def error! e, dst=nil
             @action = Edoors::ACT_ERROR
             @dst = dst||@src
             @payload[Edoors::FIELD_ERROR_MSG]=e
         end
         #
+        # applies the effects of the given Link
+        #
+        # @param [Link] lnk the link to apply effects
+        #
+        # updates @src with Link @src, clears the destination list
+        # adds the Link destinations to @dsts, sets the @link_keys
+        #
         def apply_link! lnk
             init! lnk.door
             clear_dsts!
-            add_dsts lnk.dsts
-            set_link_fields lnk.fields
+            add_dsts *lnk.dsts
+            set_link_keys *lnk.keys
         end
         #
-        # data manipulation
+        # adds/updates a key value pair into payload
         #
-        def []=  k, v
-            @payload[k]=v
-            compute_link_value! if @link_fields.include? k
-        end
+        # @param [String] k the key
+        # @param [Object] v the value
         #
-        def set_data k, v
+        # \@link_value attribute will be updated if impacted
+        #
+        def []=  k, v
+            @link_value[k] = v if @link_keys.include? k
             @payload[k] = v
-            compute_link_value! if @link_fields.include? k
         end
+        alias :set_data :[]=
         #
-        def []  k
-            @payload[k]
+        # destroys the value paired with a key
+        #
+        # @param [String] k the key
+        #
+        # @return the associated value
+        #
+        # \@link_value attribute will be updated if impacted
+        #
+        def del_data k
+            @link_value.delete k if @link_keys.include? k
+            @payload.delete k
         end
         #
-        def get_data k
+        # retrieves a data value from a key
+        #
+        # @param [String] k the key
+        #
+        def [] k
             @payload[k]
         end
-        alias :data :get_data
+        #
+        alias :get_data :[]
+        alias :data :[]
+        #
+        # clones the payload of the given Particle
+        #
+        # @param [Particle] p the Particle to clone the payload of
         #
         def clone_data p
             @payload = p.payload.clone
         end
         #
-        # link value and fields
+        # sets the links keys
+        #
+        # @param [Array] args list of keys to set
         #
-        def set_link_fields *args
-            @link_fields.clear if not @link_fields.empty?
+        # \@link_value attribute will be updated
+        #
+        def set_link_keys *args
+            @link_keys.clear if not @link_keys.empty?
             args.compact!
-            args.each do |lfs|
-                lfs.split(',').each do |lf|
-                    @link_fields << lf
-                end
+            args.each do |lf|
+                @link_keys << lf
             end
-            compute_link_value!
+            @link_value = @payload.select { |k,v| @link_keys.include? k }
         end
         #
-        def compute_link_value!
-            @link_value = @link_fields.inject('') { |s,lf| s+=@payload[lf].to_s if @payload[lf]; s }
+        # tries to link the Particle with the given Link
+        #
+        # @param [Link] link the link to try to link with
+        #
+        # returns true if the value of the Link is nil
+        # otherwise checks if the extracted key values pairs from the Particle
+        # payload using the Link value keys as selectors, equals the Link value
+        #
+        # @return [Boolean] true if the Link links with the Particle
+        #
+        def link_with? link
+            return true if link.value.nil?
+            link.value.keys.inject({}) { |h,k| h[k]=@payload[k] if @payload.has_key?(k); h }.eql? link.value
         end
         #
-        # merge particles management
+        # merges the given Particle in
+        #
+        # @param [Particle] p the Particle to merge in
         #
         def merge! p
             @merged << p
         end
         #
+        # returns a merged Particle
+        #
+        # @param [Integer] i the index into the merged Particle list
+        #
         def merged i
             @merged[i]
         end
         #
+        # shifts the merged Particle list
+        #
         def merged_shift
             @merged.shift
         end
         #
-        def clear_merged! r=nil
+        # recursively clears the merged Particle list
+        #
+        # @param [Boolean] r releases the cleared Particle if true
+        #
+        def clear_merged! r=false
             @merged.each do |p|
                 p.clear_merged! r
                 r.release_p p if r
diff --git a/lib/edoors/room.rb b/lib/edoors/room.rb
index 5936e27..decdb83 100644
--- a/lib/edoors/room.rb
+++ b/lib/edoors/room.rb
@@ -29,12 +29,21 @@ module Edoors
     #
     class Room < Iota
         #
+        # creates a Room object from the arguments.
+        #
+        # @param [String] n the name of this Room
+        # @param [Iota] p the parent
+        #
         def initialize n, p
             super n, p
             @iotas = {}
             @links = {}
         end
         #
+        # called by JSON#generate to serialize the Room object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
+        #
         def to_json *a
             {
                 'kls'   => self.class.name,
@@ -44,6 +53,12 @@ module Edoors
             }.to_json *a
         end
         #
+        # creates a Room object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
             room = self.new o['name'], o['parent']
@@ -58,33 +73,65 @@ module Edoors
             room
         end
         #
-        def self.from_particle_data p, s
+        # creates a Room object from the data of a particle
+        #
+        # @param [Particle] p the Particle to get Room attributes from
+        #
+        def self.from_particle p, s
             Edoors::Room.new(p.get_data(Edoors::IOTA_NAME), s)
         end
         #
-        def add_iota s
-            raise Edoors::Exception.new "Iota #{s.name} already has #{s.parent.name} as parent" if not s.parent.nil? and s.parent!=self
-            raise Edoors::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
+        # adds the given Iota to this Room
+        #
+        # @param [Iota] i the Iota to add
+        #
+        # @raise Edoors::Exception if i already has a parent or if a Iota with the same name already exists
+        #
+        def add_iota i
+            raise Edoors::Exception.new "Iota #{i.name} already has #{i.parent.name} as parent" if not i.parent.nil? and i.parent!=self
+            raise Edoors::Exception.new "Iota #{i.name} already exists in #{path}" if @iotas.has_key? i.name
+            i.parent = self if i.parent.nil?
+            @iotas[i.name]=i
         end
         #
+        # adds the given Link to this Room
+        #
+        # @param [Link] l the Link to add
+        #
+        # @raise Edoors::Exception if the link source can't be found in this Room
+        #
         def add_link l
             l.door = @iotas[l.src]
             raise Edoors::Exception.new "Link source #{l.src} does not exist in #{path}" if l.door.nil?
             (@links[l.src] ||= [])<< l
         end
         #
+        # forward the call to each children
+        #
+        # @see Spin#spin! called on system bootup
+        #
         def start!
             puts " * start #{path}" if @spin.debug_routing
             @iotas.values.each do |iota| iota.start! end
         end
         #
+        # forward the call to each children
+        #
+        # @see Spin#spin! called on system shutdown
+        #
         def stop!
             puts " * stop #{path}" if @spin.debug_routing
             @iotas.values.each do |iota| iota.stop! end
         end
         #
+        # search through all children for a matching Iota
+        #
+        # @param [String] spath the full path of the earch Iota
+        #
+        # @return [Iota] if found
+        #
+        # @see Particle#initialize used to transform @src and @dst JSON data into refrences
+        #
         def search_down spath
             return self if spath==path
             return nil if (spath=~/^#{path}\/(\w+)\/?/)!=0
@@ -95,17 +142,17 @@ module Edoors
             nil
         end
         #
+        # search for a matching link
+        #
+        # @param [Particle] p the Particle searching for a matching link
+        #
         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 p.link_with? link
                     if pending_link
                         p2 = @spin.require_p p.class
                         p2.clone_data p
@@ -117,12 +164,16 @@ module Edoors
             end
             if pending_link
                 p.apply_link! pending_link
-                _send false, p
+                _send p
             end
             pending_link
         end
         private :_try_links
         #
+        # route the given Particle
+        #
+        # @param [Particle] p the Particle to be routed
+        #
         def _route p
             if p.room.nil? or p.room==path
                 if door = @iotas[p.door]
@@ -138,7 +189,12 @@ module Edoors
         end
         private :_route
         #
-        def _send sys, p
+        # send the given Particle
+        #
+        # @param [Particle] p the Particle to send
+        # @param [Boolean] sys if true send to system Particle fifo
+        #
+        def _send p, sys=false
             if not sys and p.src.nil?
                 # do not route non system orphan particles !!
                 p.error! Edoors::ERROR_ROUTE_NS, @spin
@@ -166,25 +222,39 @@ module Edoors
         end
         private :_send
         #
+        # send the given Particle to application Particle fifo
+        #
+        # @param [Particle] p the Particle to send
+        #
         def send_p p
             puts " * send_p #{(p.next_dst.nil? ? 'no dst' : p.next_dst)} ..." if @spin.debug_routing
-            _send false, p
+            _send p
             puts "   -> #{p.dst.path}#{Edoors::ACT_SEP}#{p.action}" if @spin.debug_routing
             @spin.post_p p
         end
         #
+        # send the given Particle to system Particle fifo
+        #
+        # @param [Particle] p the Particle to send
+        #
         def send_sys_p p
             puts " * send_sys_p #{(p.next_dst.nil? ? 'no dst' : p.next_dst)} ..." if @spin.debug_routing
-            _send true, p
+            _send p, true
             puts "   -> #{p.dst.path}#{Edoors::ACT_SEP}#{p.action}" if @spin.debug_routing
             @spin.post_sys_p p
         end
         #
+        # process the given system Particle
+        #
+        # @param [Particle] p the Particle to be processed
+        #
+        # @note the Particle is automatically released
+        #
         def process_sys_p p
             if p.action==Edoors::SYS_ACT_ADD_LINK
-                add_link Edoors::Link.from_particle_data p
+                add_link Edoors::Link.from_particle p
             elsif p.action==Edoors::SYS_ACT_ADD_ROOM
-                Edoors::Room.from_particle_data p, self
+                Edoors::Room.from_particle p, self
             end
             @spin.release_p p
         end
diff --git a/lib/edoors/spin.rb b/lib/edoors/spin.rb
index 9f62b47..7efacf1 100644
--- a/lib/edoors/spin.rb
+++ b/lib/edoors/spin.rb
@@ -23,6 +23,25 @@ module Edoors
     #
     class Spin < Room
         #
+        # creates a Spin object from the arguments.
+        #
+        # @param [String] n the name of this Spin
+        # @param [Hash] o a customizable set of options
+        #
+        # @option o 'debug_garbage' [String Symbol]
+        #   output debug information about automatic garbage
+        # @option o 'debug_routing' [String Symbol]
+        #   output debug information about routing
+        # @option o 'hibernation' [Boolean]
+        #   if set to true Iota#start! won't be called within Spin#spin!
+        # @option o 'inner_room' [Hash]
+        #   composed of 2 keys, 'iotas' and 'links' use to repopulate the super class Room
+        # @option o 'app_fifo' [Array]
+        #   list of Particle to feed @app_fifo
+        # @option o 'sys_fifo' [Array]
+        #   list of Particle to feed @sys_fifo
+        #
+        #
         def initialize n, o={}
             super n, nil
             #
@@ -34,7 +53,7 @@ module Edoors
             @run = false
             @hibernation    = o['hibernation']||false
             @hibernate_path = 'edoors-hibernate-'+n+'.json'
-            @debug_errors   = o[:debug_errors]||o['debug_errors']||false
+            @debug_garbage  = o[:debug_garbage]||o['debug_garbage']||false
             @debug_routing  = o[:debug_routing]||o['debug_routing']||false
             #
             if not o.empty?
@@ -58,7 +77,11 @@ module Edoors
             end
         end
         #
-        attr_accessor :run, :hibernate_path, :debug_errors, :debug_routing
+        attr_accessor :run, :hibernate_path, :debug_garbage, :debug_routing
+        #
+        # called by JSON#generate to serialize the Spin object into JSON data
+        #
+        # @param [Array] a belongs to JSON generator
         #
         def to_json *a
             {
@@ -69,25 +92,46 @@ module Edoors
                 'inner_room'    => { :iotas=>@iotas, :links=>@links },
                 'sys_fifo'      => @sys_fifo,
                 'app_fifo'      => @app_fifo,
-                'debug_errors'  => @debug_errors,
+                'debug_garbage' => @debug_garbage,
                 'debug_routing' => @debug_routing
             }.to_json(*a)
         end
         #
+        # creates a Spin object from a JSON data
+        #
+        # @param [Hash] o belongs to JSON parser
+        #
+        # @raise Edoors::Exception if the json kls attribute is wrong
+        #
         def self.json_create o
             raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
             self.new o['name'], o
         end
         #
+        # add the given Iota to the global Hash
+        #
+        # @param [Iota] iota the Iota to register
+        #
+        # @see Room#_route @world hash is used for routing
+        #
         def add_to_world iota
             @world[iota.path] = iota
         end
         #
+        # search the global Hash for the matching Iota
+        #
+        # @param [String] path the path to the desired Iota
+        #
+        # @see Room#_route @world hash is used for routing
+        #
         def search_world path
             @world[path]
         end
         #
+        # clears all the structures
+        #
         def clear!
+            @links.clear
             @iotas.clear
             @world.clear
             @pool.clear
@@ -95,6 +139,13 @@ module Edoors
             @app_fifo.clear
         end
         #
+        # releases the given Particle
+        #
+        # @parama [Particle] p the Particle to be released
+        #
+        # @note the Particle is stored into Hash @pool to be reused as soon as needed
+        #
+        # @see Particle#reset! the Particle is reseted before beeing stored
         #
         def release_p p
             # hope there is no circular loop
@@ -105,6 +156,12 @@ module Edoors
             ( @pool[p.class] ||= [] ) << p
         end
         #
+        # requires a Particle of the given Class
+        #
+        # @param [Class] p_kls the desired Class of Particle
+        #
+        # @note if there is no Particle of the given Class, one is created
+        #
         def require_p p_kls
             l = @pool[p_kls]
             return p_kls.new if l.nil?
@@ -113,14 +170,26 @@ module Edoors
             p
         end
         #
+        # add the given Particle to the application Particle fifo
+        #
+        # @param [Particle] p the Particle to add
+        #
         def post_p p
             @app_fifo << p
         end
         #
+        # add the given Particle to the system Particle fifo
+        #
+        # @param [Particle] p the Particle to add
+        #
         def post_sys_p p
             @sys_fifo << p
         end
         #
+        # process the given particle
+        #
+        # @param [Particle] p the Particle to be processed
+        #
         def process_sys_p p
             if p.action==Edoors::SYS_ACT_HIBERNATE
                 stop!
@@ -130,6 +199,12 @@ module Edoors
             end
         end
         #
+        # starts the system mainloop
+        #
+        # first Iota#start! is called on each children unless the system is resuming from hibernation
+        # then while there is Particle in the fifo, first process all system Particle then 1 application Particle
+        # after all Iota#stop! is called on each children, unless the system is going into hibernation
+        #
         def spin!
             @iotas.values.each do |iota| iota.start! end unless @hibernation
             @run = true
@@ -148,15 +223,27 @@ module Edoors
             @iotas.values.each do |iota| iota.stop! end unless @hibernation
         end
         #
+        # stops the spinning
+        #
         def stop!
             @run=false
         end
         #
+        # sends the system into hibernation
+        #
+        # @param [String] path the path to the hibernation file
+        #
+        # the system is serialized into JSON data and flushed to disk
+        #
         def hibernate! path=nil
             @hibernation = true
             File.open(path||@hibernate_path,'w') do |f| f << JSON.pretty_generate(self) end
         end
         #
+        # resumes the system from the given hibernation file
+        #
+        # @param [String] path the hibernation file to load the system from
+        #
         def self.resume! path
             self.json_create JSON.load File.open(path,'r') { |f| f.read }
         end