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 55

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

  @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!
end

Instance Attribute Details

#callbacks ⇒ Object (readonly)

Returns the value of attribute callbacks.



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# File 'lib/cpee/controller.rb', line 101

def callbacks
  @callbacks
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/cpee/controller.rb', line 98

def id
  @id
end

#mutex ⇒ Object (readonly)

Returns the value of attribute mutex.



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# File 'lib/cpee/controller.rb', line 102

def mutex
  @mutex
end

#notifications ⇒ Object (readonly)

Returns the value of attribute notifications.



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# File 'lib/cpee/controller.rb', line 100

def notifications
  @notifications
end

#properties ⇒ Object (readonly)

Returns the value of attribute properties.



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# File 'lib/cpee/controller.rb', line 99

def properties
  @properties
end

Instance Method Details

#add_ws(key, socket) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 482

def add_ws(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

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

}}}



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# File 'lib/cpee/controller.rb', line 419

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)
          params = notf.map{|ke,va|Riddl::Parameter::Simple.new(ke,va)}
          @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,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

#del_ws(key) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 496

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

#instance_url ⇒ Object 



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

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

#notify(what, content = {}) ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 398

def notify(what,content={})# {{{
  item = @events[what]
  if item
    item.each do |ke,ur|
      Thread.new(ke,ur) do |key,url|
        ev = build_notification(key,what,content,'event')
        if url.class == String
          client = Riddl::Client.new(url,nil,:xmpp => @opts[:xmpp])
          client.post ev.map{|k,v|Riddl::Parameter::Simple.new(k,v)} rescue nil
        elsif url.class == Riddl::Utils::Notifications::Producer::WS
          e = XML::Smart::string("<event/>")
          ev.each do |k,v|
            e.root.add(k,v)
          end
          url.send(e.to_s) rescue nil
        end  
      end
    end
  end
end

#serialize_dataelements! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 141

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 150

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 170

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 159

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 180

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 111

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 116

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 124

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(nil)
      true
    else  
      false
    end
  end  
  @thread.join if !@thread.nil? && @thread.alive?
  @callback = [] # everything should be empty now
end

#unserialize_dataelements! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 253

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 310

def unserialize_description! #{{{
  dsl = nil
  nots = []
  @properties.modify do |doc|
    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

    ### description transformation, including dslx to dsl
    addit = if tdesc.attributes['type'] == 'copy' || tdesc.empty?
      desc.children.first.to_doc.root
    elsif tdesc.attributes['type'] == 'rest' && !tdesc.empty?
      srv = Riddl::Client.interface(tdesc.text,@opts[:transformation_service],:xmpp => @opts[:xmpp])
      status, res = srv.post [
        Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
        Riddl::Parameter::Simple.new("type","description")
      ]
      XML::Smart::string(res[0].value.read).root if status == 200
    elsif tdesc.attributes['type'] == 'xslt' && !tdesc.empty?
      trans = XML::Smart::open_unprotected(tdesc.text)
      desc.children.first.to_doc.transform_with(trans).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 tdata.attributes['type'] == 'rest' && !tdata.empty?
      srv = Riddl::Client.interface(tdata.text,@opts[:transformation_service],:xmpp => @opts[:xmpp])
      status, res = srv.post [ 
        Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
        Riddl::Parameter::Simple.new("type","dataelements")
      ]
      res
    elsif tdata.attributes['type'] == 'xslt' && !tdata.empty?
      trans = XML::Smart::open_unprotected(tdata.text)
      desc.children.first.to_doc.transform_with(trans)
    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 << ["properties/dataelements/change", {:instance => instance_url, :changed => JSON::generate(@instance.data)}]
    end  

    ### enpoints extraction
    addit = if tendp.attributes['type'] == 'rest' && !tdata.empty?
      srv = Riddl::Client.interface(tendp.text,@opts[:transformation_service],:xmpp => @opts[:xmpp])
      status, res = srv.post [ 
        Riddl::Parameter::Complex.new("description","text/xml",desc.children.first.dump),
        Riddl::Parameter::Simple.new("type","endpoints")
      ]
      res
    elsif tendp.attributes['type'] == 'xslt' && !tdata.empty?
      trans = XML::Smart::open_unprotected(tendp.text)
      desc.children.first.to_doc.transform_with(trans)
    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 << ["properties/endpoints/change", {:instance => instance_url, :changed => JSON::generate(@instance.endpoints)}]
    end  
  end
  nots
end

#unserialize_dsl! ⇒ Object

}}}



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# File 'lib/cpee/controller.rb', line 307

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 259

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 285

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 189

def unserialize_notifications!(op,key)# {{{
  case op
    when :del
      @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[key]
        url = @communication[key]
        evs = []
        vos = []
        @events.each { |e,v| evs << e }
        @votes.each { |e,v| vos << e }
        @notifications.subscriptions[key].view 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| @votes[e].delete(key) }
        vos.each do |e| 
          @callbacks.each{|voteid,cb|cb.delete_if!(e,key)}
          @votes[e].delete(key)
        end  
      end  
    when :cre
      @notifications.subscriptions[key].view 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 300

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 265

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

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

}}}



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# File 'lib/cpee/controller.rb', line 470

def vote_callback(result,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

#xmpp ⇒ Object 



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# File 'lib/cpee/controller.rb', line 107

def xmpp 
  @opts[:xmpp]
end