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, dir, opts) ⇒ Controller

Returns a new instance of Controller.



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# File 'lib/cpee/controller.rb', line 37

def initialize(id,dir,opts)
  CPEE::redis_connect(opts)

  @redis = opts[:redis]
  @votes = []

  @id = id

  @attributes = {}
  @redis.keys("instance:#{id}/attributes/*").each do |key|
    @attributes[File.basename(key)] = @redis.get(key)
  end

  @attributes_helper = AttributesHelper.new
  @thread = nil
  @opts = opts
  @instance = nil
  @loop_guard = {}

  @callback_keys = {}
  @psredis = @opts[:redis_dyn].call

  Thread.new do
    @psredis.psubscribe('callback-response:*','callback-end:*') do |on|
      on.pmessage do |pat, what, message|
        if pat == 'callback-response:*' && @callback_keys.has_key?(what[18..-1])
          index = message.index(' ')
          mess = message[index+1..-1]
          instance = message[0...index]
          m = JSON.parse(mess)
          resp = []
          m['content']['values'].each do |e|
            if e[1][0] == 'simple'
              resp << Riddl::Parameter::Simple.new(e[0],e[1][1])
            elsif e[1][0] == 'complex'
              resp << Riddl::Parameter::Complex.new(e[0],e[1][1],File.open(e[1][2]))
            end
          end
          @callback_keys[what[18..-1]].send(:callback,resp,m['content']['headers'])
        end
        if pat == 'callback-end:*'
          @callback_keys.delete(what[13..-1])
        end
      end
    end
  end
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/cpee/controller.rb', line 86

def attributes
  @attributes
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/cpee/controller.rb', line 85

def id
  @id
end

#loop_guard ⇒ Object (readonly)

Returns the value of attribute loop_guard.



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# File 'lib/cpee/controller.rb', line 87

def loop_guard
  @loop_guard
end

Instance Method Details

#attributes_translated ⇒ Object 



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# File 'lib/cpee/controller.rb', line 93

def attributes_translated
  @attributes_helper.translate(attributes,dataelements,endpoints)
end

#base ⇒ Object 



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

def base
  base_url
end

#base_url ⇒ Object 



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

def base_url
  @opts[:url]
end

#callback(hw, key, content) ⇒ Object 



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# File 'lib/cpee/controller.rb', line 189

def callback(hw,key,content)
  CPEE::Message::send(:callback,'activity/content',base,@id,uuid,info,content.merge(:key => key),@redis)
  @callback_keys[key] = hw
end

#cancel_callback(key) ⇒ Object 



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# File 'lib/cpee/controller.rb', line 194

def cancel_callback(key)
  CPEE::Message::send(:'callback-end',key,base,@id,uuid,info,{},@redis)
end

#dataelements ⇒ Object 



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# File 'lib/cpee/controller.rb', line 118

def dataelements
  @instance.data
end

#endpoints ⇒ Object 



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

def endpoints
  @instance.endpoints
end

#host ⇒ Object 



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# File 'lib/cpee/controller.rb', line 97

def host
  @opts[:host]
end

#info ⇒ Object 



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# File 'lib/cpee/controller.rb', line 144

def info
  @attributes['info']
end

#instance=(inst) ⇒ Object 



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

def instance=(inst)
  @instance = inst
end

#instance_id ⇒ Object 



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# File 'lib/cpee/controller.rb', line 106

def instance_id
  @id
end

#instance_url ⇒ Object 



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# File 'lib/cpee/controller.rb', line 103

def instance_url
  File.join(@opts[:url].to_s,@id.to_s)
end

#notify(what, content = {}) ⇒ Object 



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# File 'lib/cpee/controller.rb', line 148

def notify(what,content={})
  content[:attributes] = attributes_translated
  CPEE::Message::send(:event,what,base,@id,uuid,info,content,@redis)
end

#start ⇒ Object 



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# File 'lib/cpee/controller.rb', line 122

def start
  if vote("state/change", :state => 'running')
    @thread = @instance.start
    @thread.join
  else
    @thread = @instance.stop
    @thread.join
  end
end

#stop ⇒ Object 



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

def stop
  ### tell the instance to stop
  @instance.stop
  ### end all votes or it will not work
  Thread.new do # doing stuff in trap context is a nono. but in a thread its fine :-)
    @votes.each do |key|
      CPEE::Message::send(:'vote-response',key,base,@id,uuid,info,true,@redis)
    end
  end
  @thread.join if !@thread.nil? && @thread.alive?
end

#uuid ⇒ Object 



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# File 'lib/cpee/controller.rb', line 89

def uuid
  @attributes['uuid']
end

#vote(what, content = {}) ⇒ Object 



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

def vote(what,content={})
  topic, name = what.split('/')
  handler = File.join(topic,'vote',name)
  votes = []
  @redis.smembers("instance:#{id}/handlers/#{handler}").each do |client|
    voteid = Digest::MD5.hexdigest(Kernel::rand().to_s)
    content[:key] = voteid
    content[:attributes] = attributes_translated
    content[:subscription] = client
    votes << voteid
    CPEE::Message::send(:vote,what,base,@id,uuid,info,content,@redis)
  end

  if votes.length > 0
    @votes += votes
    psredis = @opts[:redis_dyn].call
    collect = []
    psredis.subscribe(votes.map{|e| ['vote-response:' + e.to_s, 'vote-end:' + e.to_s] }.flatten) do |on|
      on.message do |what, message|
        index = message.index(' ')
        mess = message[index+1..-1]
        m = JSON.parse(mess)
        collect << ((m['content'] == true || m['content'] == 'true') || false)
        @votes.delete m['name']
        cancel_callback m['name']
        if collect.length >= votes.length
          psredis.unsubscribe
        end
      end
    end
    !collect.include?(false)
  else
    true
  end
end