Class: Factor::Runtime

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

Overview

Runtime class is the magic of the server

Defined Under Namespace

Classes: DeepStruct

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(connectors, credentials) ⇒ Runtime

Returns a new instance of Runtime.



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# File 'lib/runtime.rb', line 19

def initialize(connectors, credentials)
  @workflow_spec  = {}
  @sockets        = []
  @instance_id    = SecureRandom.hex(3)
  @reconnect      = true

  trap 'SIGINT' do
    info "Exiting '#{@instance_id}'"
    @reconnect = false
    @sockets.each { |s| s.close }
    exit
  end

  @connectors = {}
  flat_hash(connectors).each do |key, connector_url|
    @connectors[key] = Listener.new(connector_url)
  end

  @credentials = {}
  credentials.each do |connector_id, credential_settings|
    @credentials[connector_id] = credential_settings
  end
end

Instance Attribute Details

#connectors ⇒ Object

Returns the value of attribute connectors.



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# File 'lib/runtime.rb', line 17

def connectors
  @connectors
end

#credentials ⇒ Object

Returns the value of attribute credentials.



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# File 'lib/runtime.rb', line 17

def credentials
  @credentials
end

#description ⇒ Object

Returns the value of attribute description.



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# File 'lib/runtime.rb', line 17

def description
  @description
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/runtime.rb', line 17

def id
  @id
end

#instance_id ⇒ Object

Returns the value of attribute instance_id.



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# File 'lib/runtime.rb', line 17

def instance_id
  @instance_id
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/runtime.rb', line 17

def logger
  @logger
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/runtime.rb', line 17

def name
  @name
end

Instance Method Details

#listen(service_ref, params = {}, &block) ⇒ Object 



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# File 'lib/runtime.rb', line 49

def listen(service_ref, params = {}, &block)
  service_map = service_ref.split('::') 
  service_id = service_map.first
  listener_id = service_map.last
  service_key = service_map[0..-2].map{|k| k.to_sym}

  ws = @connectors[service_key].listener(listener_id)

  handle_on_open(service_ref, 'Listener', ws, params)

  ws.on :close do
    error 'Listener disconnected'
    if @reconnect
      warn 'Reconnecting...'
      sleep 3
      ws.open
    end
  end

  ws.on :message do |event|
    listener_response = JSON.parse(event.data)
    case listener_response['type']
    when'start_workflow'
      success "Workflow '#{service_id}::#{listener_id}' triggered"
      error_handle_call(listener_response, &block)
    when 'return'
      success "Workflow '#{service_ref}' started"
    when 'fail'
      error "Workflow '#{service_ref}' failed to start"
    when 'log'
      listener_response['message'] = "  #{listener_response['message']}"
      log_message(listener_response)
    else
      error "Unknown listener response: #{listener_response}"
    end
  end

  ws.on :retry do |event|
    warn event[:message]
  end

  ws.on :error do |event|
    err = 'Error during WebSocket handshake: Unexpected response code: 401'
    if event.message == err
      error "Sorry but you don't have access to this listener,
        | either because your token is invalid or your plan doesn't
        | support this listener"
    else
      error 'Failure in WebSocket connection to connector service'
    end
  end

  ws.open

  @sockets << ws
end

#load(workflow_definition) ⇒ Object 



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# File 'lib/runtime.rb', line 43

def load(workflow_definition)
  EM.run do
    instance_eval(workflow_definition)
  end
end

#run(service_ref, params = {}, &block) ⇒ Object 



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# File 'lib/runtime.rb', line 106

def run(service_ref, params = {}, &block)
  service_map = service_ref.split('::') 
  service_id = service_map.first
  action_id = service_map.last
  service_key = service_map[0..-2].map{|k| k.to_sym}

  ws = @connectors[service_key].action(action_id)

  handle_on_open(service_ref, 'Action', ws, params)

  ws.on :error do
    error 'Connection dropped while calling action'
  end

  ws.on :message do |event|
    action_response = JSON.parse(event.data)
    case action_response['type']
    when 'return'
      ws.close
      success "Action '#{service_ref}' responded"
      error_handle_call(action_response, &block)
    when 'fail'
      ws.close
      error "  #{action_response['message']}"
      error "Action '#{service_ref}' failed"
    when 'log'
      action_response['message'] = "  #{action_response['message']}"
      log_message(action_response)
    else
      error "Unknown action response: #{action_response}"
    end
  end

  ws.open

  @sockets << ws
end