Class: CPEE::Controller

Inherits:
Object
  • Object
show all
Defined in:
lib/cpee/controller.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, opts) ⇒ Controller

Returns a new instance of Controller.



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# File 'lib/cpee/controller.rb', line 56

def initialize(id,opts)
  @directory = opts[:instances] + "/#{id}/"
  @id = id
  @events = {}
  @votes = {}
  @votes_results = {}
  @communication = {}
  @callbacks = {}
  @instance = EmptyWorkflow.new(self)
  @positions = []
  @attributes = {}
  @thread = nil
  @mutex = Mutex.new
  @opts = opts

  @properties = Riddl::Utils::Properties::Backend.new(
    {
      :inactive => opts[:properties_schema_inactive],
      :active   => opts[:properties_schema_active],
      :finished => opts[:properties_schema_finished]
    },
    @directory + '/properties.xml',
    opts[:properties_init]
  )
  @notifications =  Riddl::Utils::Notifications::Producer::Backend.new(
    opts[:topics],
    @directory + '/notifications/',
    opts[:notifications_init]
  )

  @notifications.subscriptions.keys.each do |key|
    self.unserialize_notifications!(:cre,key)
  end
  unless ['stopped','ready','finished'].include?(@properties.data.find("string(/p:properties/p:state)"))
    @properties.modify do |doc|
      doc.find("/p:properties/p:state").first.text = 'stopped'
    end
  end
  unserialize_handlerwrapper!
  unserialize_dataelements!
  unserialize_endpoints!
  unserialize_dsl!
  unserialize_positions!

  @uuid = sync_uuid!
  unserialize_attributes!
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/cpee/controller.rb', line 129

def attributes
  @attributes
end

#callbacks ⇒ Object (readonly)

Returns the value of attribute callbacks.



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# File 'lib/cpee/controller.rb', line 127

def callbacks
  @callbacks
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/cpee/controller.rb', line 124

def id
  @id
end

#mutex ⇒ Object (readonly)

Returns the value of attribute mutex.



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# File 'lib/cpee/controller.rb', line 128

def mutex
  @mutex
end

#notifications ⇒ Object (readonly)

Returns the value of attribute notifications.



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# File 'lib/cpee/controller.rb', line 126

def notifications
  @notifications
end

#properties ⇒ Object (readonly)

Returns the value of attribute properties.



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# File 'lib/cpee/controller.rb', line 125

def properties
  @properties
end

#uuid ⇒ Object (readonly)

Returns the value of attribute uuid.



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# File 'lib/cpee/controller.rb', line 130

def uuid
  @uuid
end

Instance Method Details

#add_websocket(key, socket) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 593

def add_websocket(key,socket)# {{{
  @communication[key] = socket
  @events.each do |a|
    if a[1].has_key?(key)
      a[1][key] = socket
    end
  end
  @votes.each do |a|
    if a[1].has_key?(key)
      a[1][key] = socket
    end
  end
end

#base ⇒ Object 



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# File 'lib/cpee/controller.rb', line 146

def base
  base_url
end

#base_url ⇒ Object 



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# File 'lib/cpee/controller.rb', line 140

def base_url
  @opts[:url]
end

#call_vote(what, content = {}) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 527

def call_vote(what,content={})# {{{
  voteid = Digest::MD5.hexdigest(Kernel::rand().to_s)
  item = @votes[what]
  if item && item.length > 0
    continue = WEEL::Continue.new
    @votes_results[voteid] = []
    inum = 0
    item.each do |key,url|
      if url.class == String
        inum += 1
      elsif url.class == Riddl::Utils::Notifications::Producer::WS
        inum += 1 unless url.closed?
      end
    end

    item.each do |key,url|

      Thread.new(key,url,content.dup) do |k,u,c|
        callback = Digest::MD5.hexdigest(Kernel::rand().to_s)
        c['callback'] = callback
        notf = build_notification(k,what,c,'vote',callback)
        if u.class == String
          client = Riddl::Client.new(u,'http://riddl.org/ns/common-patterns/notifications-consumer/1.0/consumer.xml')
          params = notf.map{|ke,va|Riddl::Parameter::Simple.new(ke,va)}
          params << Riddl::Header.new("CPEE-BASE",self.base_url)
          params << Riddl::Header.new("CPEE-INSTANCE",self.instance_url)
          params << Riddl::Header.new("CPEE-CALLBACK",self.instance_url + '/callbacks/' + callback)
          @mutex.synchronize do
            status, result, headers = client.post params
            if headers["CPEE_CALLBACK"] && headers["CPEE_CALLBACK"] == 'true'
              @callbacks[callback] = Callback.new("vote #{notf.find{|a,b| a == 'notification'}[1]}", self, :vote_callback, what, k, :http, continue, voteid, callback, inum)
            else
              vote_callback(result,nil,continue,voteid,callback,inum)
            end
          end
        elsif u.class == Riddl::Utils::Notifications::Producer::WS
          @callbacks[callback] = Callback.new("vote #{notf.find{|a,b| a == 'notification'}[1]}", self, :vote_callback, what, k, :ws, continue, voteid, callback, inum)
          e = XML::Smart::string("<vote/>")
          notf.each do |ke,va|
            e.root.add(ke,va)
          end
          u.send(e.to_s)
        end
      end

    end
    continue.wait

    !@votes_results.delete(voteid).include?(false)
  else
    true
  end
end

#console(cmd) ⇒ Object 



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# File 'lib/cpee/controller.rb', line 132

def console(cmd)
  x = eval(cmd)
  x.class == String ? x : x.pretty_inspect
end

#gc ⇒ Object 



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# File 'lib/cpee/controller.rb', line 115

def gc
  x = GC.stat
  y = {}
  y[:heap_live_slots]         = x[:heap_live_slots]
  y[:total_allocated_objects] = x[:total_allocated_objects]
  y[:total_freed_objects]     = x[:total_freed_objects]
  y
end

#help ⇒ Object 



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# File 'lib/cpee/controller.rb', line 104

def help
  "\033[1m\033[31mpm or public_methods(false)\033[0m\033[0m\n  Methods.\n" +
  "\033[1m\033[31miv or instance_variables\033[0m\033[0m\n  Attributes.\n" +
  "\033[1m\033[31mgc or GC.stat\033[0m\033[0m\n  GC stats to look for memleaks. Google for 'GC.stat ruby'.\n"
end

#host ⇒ Object 



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# File 'lib/cpee/controller.rb', line 137

def host
  @opts[:host]
end

#info ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 183

def info
  @properties.data.find("string(/p:properties/p:attributes/p:info)")
end

#instance ⇒ Object 



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# File 'lib/cpee/controller.rb', line 149

def instance
  instance_url
end

#instance_url ⇒ Object 



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# File 'lib/cpee/controller.rb', line 143

def instance_url
  "#{@opts[:url]}/#{@id}"
end

#iv ⇒ Object 



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# File 'lib/cpee/controller.rb', line 112

def iv
  instance_variables
end

#notify(what, content = {}) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 503

def notify(what,content={})# {{{
  item = @events[what]
  if item
    item.each do |ke,ur|
      Thread.new(ke,ur) do |key,url|
        notf = build_notification(key,what,content,'event')
        if url.class == String
          client = Riddl::Client.new(url,'http://riddl.org/ns/common-patterns/notifications-consumer/1.0/consumer.xml')
          params = notf.map{|ke,va|Riddl::Parameter::Simple.new(ke,va)}
          params << Riddl::Header.new("CPEE-BASE",self.base)
          params << Riddl::Header.new("CPEE-INSTANCE",self.instance)
          client.post params
        elsif url.class == Riddl::Utils::Notifications::Producer::WS
          e = XML::Smart::string("<event/>")
          notf.each do |k,v|
            e.root.add(k,v)
          end
          url.send(e.to_s) rescue nil
        end
      end
    end
  end
end

#pm ⇒ Object 



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# File 'lib/cpee/controller.rb', line 109

def pm
  public_methods(false)
end

#serialize_dataelements! ⇒ Object

{{{



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# File 'lib/cpee/controller.rb', line 187

def serialize_dataelements! #{{{
  @properties.modify do |doc|
    node = doc.find("/p:properties/p:dataelements").first
    node.children.delete_all!
    @instance.data.each do |k,v|
      node.add(k.to_s,ValueHelper::generate(v))
    end
  end
end

#serialize_endpoints! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 196

def serialize_endpoints! #{{{
  @properties.modify do |doc|
    node = doc.find("/p:properties/p:endpoints").first
    node.children.delete_all!
    @instance.endpoints.each do |k,v|
      node.add(k.to_s,v)
    end
  end
end

#serialize_positions! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 216

def serialize_positions! # {{{
  @properties.modify do |doc|
    pos = doc.find("/p:properties/p:positions").first
    pos.children.delete_all!
    @positions = @instance.positions
    @instance.positions.each do |p|
      pos.add("#{p.position}",[p.detail,p.passthrough].compact.join(';'))
    end
  end
end

#serialize_state! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 205

def serialize_state! # {{{
  @properties.activate_schema(:finished) if @instance.state == :finished
  @properties.activate_schema(:inactive) if @instance.state == :stopped || @instance.state == :ready
  @properties.activate_schema(:active)   if @instance.state == :running || @instance.state == :simulating
  if [:finished, :stopped, :ready].include?(@instance.state)
    @properties.modify do |doc|
      node = doc.find("/p:properties/p:state").first
      node.text = @instance.state
    end
  end
end

#serialize_status! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 226

def serialize_status! #{{{
  @properties.modify do |doc|
    node = doc.find("/p:properties/p:status/p:id").first
    node.text = @instance.status.id
    node = doc.find("/p:properties/p:status/p:message").first
    node.text = @instance.status.message
  end
end

#sim ⇒ Object

{{{



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# File 'lib/cpee/controller.rb', line 153

def sim # {{{
  @thread.join if !@thread.nil? && @thread.alive?
  @thread = @instance.sim
end

#start ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 158

def start # {{{
  @thread.join if !@thread.nil? && @thread.alive?
  unless @positions.empty?
    @instance.search(@positions)
  end
  @thread = @instance.start
end

#stop ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 166

def stop # {{{
  t = @instance.stop
  t.run
  @callbacks.delete_if do |k,c|
    # only remove vote_callbacks, the other stuff is removed by
    # the instance stopping cleanup
    if c.method == :vote_callback
      c.callback
      true
    else
      false
    end
  end
  @thread.join if !@thread.nil? && @thread.alive?
  @callback = [] # everything should be empty now
end

#sync_uuid! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 492

def sync_uuid! #{{{
  val = SecureRandom.uuid
  uuid = @properties.data.find("/p:properties/p:attributes/p:uuid")
  if uuid.empty?
    @properties.modify { |doc| doc.find("/p:properties/p:attributes").first.prepend('p:uuid',val) }
    val
  else
    uuid.first.text
  end
end

#unserialize_attributes! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 303

def unserialize_attributes! #{{{
  @attributes = {}
  @properties.data.find("/p:properties/p:attributes/p:*").map do |ele|
    @attributes[ele.qname.name] = ele.text
  end
  uuid = @properties.data.find("/p:properties/p:attributes/p:uuid")
  if uuid.empty? || uuid.length != 1 || @properties.data.find("/p:properties/p:attributes/p:uuid[.=\"#{@uuid}\"]").empty?
    @properties.modify do |doc|
      attr = doc.find("/p:properties/p:attributes").first
      attr.find('p:uuid').delete_all!
      attr.prepend('uuid',@uuid)
    end
  end
end

#unserialize_dataelements! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 317

def unserialize_dataelements! #{{{
  @instance.data.clear
  @properties.data.find("/p:properties/p:dataelements/p:*").each do |e|
    @instance.data[e.qname.to_sym] = ValueHelper::parse(e.text)
  end
end

#unserialize_description! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 373

def unserialize_description! #{{{
  dsl = nil
  nots = []
  @properties.modify do |doc|
    begin
      dsl   = doc.find("/p:properties/p:dsl").first
      dslx  = doc.find("/p:properties/p:dslx").first
      desc  = doc.find("/p:properties/p:description").first
      tdesc = doc.find("/p:properties/p:transformation/p:description").first
      tdata = doc.find("/p:properties/p:transformation/p:dataelements").first
      tendp = doc.find("/p:properties/p:transformation/p:endpoints").first

      tdesctype = tdesc.attributes['type']
      tdatatype = tdata.attributes['type']
      tendptype = tendp.attributes['type']

      if desc.children.empty?
        tdesctype = tdatatype = tendptype = 'clean'
      end

      ### description transformation, including dslx to dsl
      addit = if tdesctype == 'copy' || tdesc.empty?
        desc.children.first.to_doc.root
      elsif tdesctype == 'rest' && !tdesc.empty?
        srv = Riddl::Client.interface(tdesc.text,@opts[:transformation_service])
        status, res = srv.post [
          Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
          Riddl::Parameter::Simple.new("type","description")
        ]
        if status >= 200 && status < 300
          XML::Smart::string(res[0].value.read).root
        else
          raise 'Could not extract dslx'
        end
      elsif tdesctype == 'xslt' && !tdesc.empty?
        trans = XML::Smart::open_unprotected(tdesc.text)
        desc.children.first.to_doc.transform_with(trans).root
      elsif tdesctype == 'clean'
        XML::Smart::open_unprotected(@opts[:empty_dslx]).root
      else
        nil
      end
      unless addit.nil?
        dslx.children.delete_all!
        dslx.add addit
        trans = XML::Smart::open_unprotected(@opts[:transformation_dslx])
        dsl.text = dslx.to_doc.transform_with(trans)
        @instance.description = dsl.text
      end

      ### dataelements extraction
      addit = if tdatatype == 'rest' && !tdata.empty?
        srv = Riddl::Client.interface(tdata.text,@opts[:transformation_service])
        status, res = srv.post [
          Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
          Riddl::Parameter::Simple.new("type","dataelements")
        ]
        if status >= 200 && status < 300
          res
        else
          raise 'Could not extract dataelements'
        end
      elsif tdatatype == 'xslt' && !tdata.empty?
        trans = XML::Smart::open_unprotected(tdata.text)
        desc.children.first.to_doc.transform_with(trans)
      elsif tdatatype == 'clean'
        []
      else
        nil
      end
      unless addit.nil?
        node = doc.find("/p:properties/p:dataelements").first
        node.children.delete_all!
        @instance.data.clear
        addit.each_slice(2).each do |k,v|
          @instance.data[k.value.to_sym] = ValueHelper::parse(v.value)
          node.add(k.value,ValueHelper::generate(v.value))
        end
        nots << ["dataelements/change", {:instance => instance, :changed => JSON::generate(@instance.data)}]
      end

      ### endpoints extraction
      addit = if tendptype == 'rest' && !tdata.empty?
        srv = Riddl::Client.interface(tendp.text,@opts[:transformation_service])
        status, res = srv.post [
          Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
          Riddl::Parameter::Simple.new("type","endpoints")
        ]
        if status >= 200 && status < 300
          res
        else
          raise 'Could not extract endpoints'
        end
      elsif tendptype == 'xslt' && !tdata.empty?
        trans = XML::Smart::open_unprotected(tendp.text)
        desc.children.first.to_doc.transform_with(trans)
      elsif tendptype == 'clean'
        []
      else
        nil
      end
      unless addit.nil?
        node = doc.find("/p:properties/p:endpoints").first
        node.children.delete_all!
        @instance.endpoints.clear
        addit.each_slice(2).each do |k,v|
          @instance.endpoints[k.value.to_sym] = ValueHelper::parse(v.value)
          node.add(k.value,ValueHelper::generate(v.value))
        end
        nots << ["endpoints/change", {:instance => instance, :changed => JSON::generate(@instance.endpoints)}]
      end
      nots << ["description/change", { :instance => instance }]
    rescue => err
      nots << ["description/error", { :instance => instance, :message => err.message }]
    end
  end
  nots
end

#unserialize_dsl! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 370

def unserialize_dsl! #{{{
  @instance.description = @properties.data.find("string(/p:properties/p:dsl)")
end

#unserialize_endpoints! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 323

def unserialize_endpoints! #{{{
  @instance.endpoints.clear
  @properties.data.find("/p:properties/p:endpoints/p:*").each do |e|
    @instance.endpoints[e.qname.to_sym] = e.text
  end
end

#unserialize_handlerwrapper! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 348

def unserialize_handlerwrapper! #{{{
  hw = nil
  begin
    hw = eval(@properties.data.find("string(/p:properties/p:handlerwrapper)"))
    @instance.handlerwrapper = hw
  rescue => e
    @instance.handlerwrapper = DefaultHandlerWrapper
  end
  if hw != @instance.handlerwrapper
    @properties.modify do |doc|
      node = doc.find("/p:properties/p:handlerwrapper").first
      node.text = @instance.handlerwrapper.to_s
    end
  end
end

#unserialize_notifications!(op, key) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 235

def unserialize_notifications!(op,key)# {{{
  case op
    when :del
      @notifications.subscriptions[key].delete if @notifications.subscriptions.include?(key)

      @communication[key].io.close_connection if @communication[key].class == Riddl::Utils::Notifications::Producer::WS
      @communication.delete(key)

      @events.each do |eve,keys|
        keys.delete_if{|k,v| key == k}
      end
      @votes.each do |eve,keys|
        keys.delete_if do |k,v|
          if key == k
            @callbacks.each{|voteid,cb|cb.delete_if!(eve,k)}
            true
          end
        end
      end
    when :upd
      if @notifications.subscriptions.include?(key)
        url = @communication[key]
        evs = []
        vos = []
        @events.each { |e,v| evs << e }
        @votes.each { |e,v| vos << e }
        @notifications.subscriptions[key].read do |doc|
          turl = doc.find('string(/n:subscription/@url)')
          url = turl == '' ? url : turl
          @communication[key] = url
          doc.find('/n:subscription/n:topic').each do |t|
            t.find('n:event').each do |e|
              @events["#{t.attributes['id']}/#{e}"] ||= {}
              @events["#{t.attributes['id']}/#{e}"][key] = url
              evs.delete("#{t.attributes['id']}/#{e}")
            end
            t.find('n:vote').each do |e|
              @votes["#{t.attributes['id']}/#{e}"] ||= {}
              @votes["#{t.attributes['id']}/#{e}"][key] = url
              vos.delete("#{t.attributes['id']}/#{e}")
            end
          end
        end
        evs.each { |e| @events[e].delete(key) if @events[e] }
        vos.each do |e|
          @callbacks.each{|voteid,cb|cb.delete_if!(e,key)}
          @votes[e].delete(key) if @votes[e]
        end
      end
    when :cre
      @notifications.subscriptions[key].read do |doc|
        turl = doc.find('string(/n:subscription/@url)')
        url = turl == '' ? nil : turl
        @communication[key] = url
        doc.find('/n:subscription/n:topic').each do |t|
          t.find('n:event').each do |e|
            @events["#{t.attributes['id']}/#{e}"] ||= {}
            @events["#{t.attributes['id']}/#{e}"][key] = (url == "" ? nil : url)
          end
          t.find('n:vote').each do |e|
            @votes["#{t.attributes['id']}/#{e}"] ||= {}
            @votes["#{t.attributes['id']}/#{e}"][key] = url
          end
        end
      end
  end
end

#unserialize_positions! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 363

def unserialize_positions! #{{{
  @positions = []
  @properties.data.find("/p:properties/p:positions/p:*").each do |e|
    val = e.text.split(';')
    @positions << ::WEEL::Position.new(e.qname.to_s.to_sym,val[0].to_sym,val[1])
  end
end

#unserialize_state! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 329

def unserialize_state! #{{{
  state = @properties.data.find("string(/p:properties/p:state)")
  if call_vote("state/change", :instance => @id, :info => info, :state => state)
    case state
      when 'stopping'
        stop
      when 'running'
        start
      when 'simulating'
        sim
      when 'ready'
        @instance.state_signal
    end
  else
    if node = @properties.data.find("/p:properties/p:state").first
      node.text = @instance.state_signal
    end
  end
end

#vote_callback(result, options, continue, voteid, callback, num) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 581

def vote_callback(result,options,continue,voteid,callback,num)# {{{
  @callbacks.delete(callback)
  if result == :DELETE
    @votes_results[voteid] << true
  else
    @votes_results[voteid] << (result && result[0] && result[0].value == 'true')
  end
  if (num == @votes_results[voteid].length)
    continue.continue
  end
end