Class: Factor::Runtime::Workflow

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(connectors, credentials, options = {}) ⇒ Workflow

Returns a new instance of Workflow.



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

def initialize(connectors, credentials, options={})
  @workflow_spec  = {}
  @workflows      = {}
  @instance_id    = SecureRandom.hex(3)
  @reconnect      = true
  @logger         = options[:logger] if options[:logger]

  @connectors = Factor::Common.flat_hash(connectors)
  @credentials = credentials
end

Instance Attribute Details

#connectors ⇒ Object

Returns the value of attribute connectors.



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# File 'lib/runtime/workflow.rb', line 15

def connectors
  @connectors
end

#credentials ⇒ Object

Returns the value of attribute credentials.



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# File 'lib/runtime/workflow.rb', line 15

def credentials
  @credentials
end

#description ⇒ Object

Returns the value of attribute description.



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# File 'lib/runtime/workflow.rb', line 15

def description
  @description
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/runtime/workflow.rb', line 15

def id
  @id
end

#instance_id ⇒ Object

Returns the value of attribute instance_id.



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# File 'lib/runtime/workflow.rb', line 15

def instance_id
  @instance_id
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/runtime/workflow.rb', line 15

def name
  @name
end

Instance Method Details

#error(message) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 179

def error(message)
  @logger.error message
end

#info(message) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 171

def info(message)
  @logger.info message
end

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



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# File 'lib/runtime/workflow.rb', line 37

def listen(service_ref, params = {}, &block)
  address = ServiceAddress.new(service_ref)
  e = ExecHandler.new(service_ref, params)
  connector_url = @connectors[address.namespace]

  unless connector_url
    error "Listener '#{address}' not found"
    e.fail_block.call({}) if e.fail_block
  else
    caller = ServiceCaller.new(connector_url)

    caller.on :close do
      error "Listener '#{address}' disconnected"
    end

    caller.on :open do
      info "Listener '#{address}' starting"
    end

    caller.on :retry do |retry_info|
      if retry_info
        details = " ("
        details << "retry #{retry_info[:count]}"
        details << ", offline for #{retry_info[:offline_duration]} seconds" if retry_info[:offline_duration] > 0
        details << ")"
      end
      warn "Listener '#{address}' reconnecting#{details || ''}"
    end

    caller.on :error do
      error "Listener '#{address}' dropped the connection"
    end

    caller.on :return do |data|
      success "Listener '#{address}' started"
    end

    caller.on :start_workflow do |data|
      success "Listener '#{address}' triggered"
      block.call(Factor::Common.simple_object_convert(data)) if block
    end

    caller.on :fail do |info|
      error "Listener '#{address}' failed"
      e.fail_block.call(action_response) if e.fail_block
    end

    caller.on :log do |log_info|
      @logger.log log_info[:status], log_info
    end

    service_credentials = @credentials[address.service.to_sym] || {}
    caller.listen(address.id,params.merge(service_credentials))
  end
  e
end

#load(workflow_definition) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 28

def load(workflow_definition)
  begin
    EM.run do
      instance_eval(workflow_definition)
    end
  rescue Interrupt
  end
end

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



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# File 'lib/runtime/workflow.rb', line 100

def run(service_ref, params = {}, &block)
  address = ServiceAddress.new(service_ref)
  e = ExecHandler.new(service_ref, params)

  if address.workflow?
    workflow_address = address.workflow_address
    workflow = @workflows[workflow_address]

    if workflow
      success "Workflow '#{workflow_address}' starting"
      content = Factor::Common.simple_object_convert(params)
      workflow.call(content)
      success "Workflow '#{workflow_address}' started"
    else
      error "Workflow '#{workflow_address}' not found"
      e.fail_block.call({}) if e.fail_block
    end
  else
    connector_url = @connectors[address.namespace]

    unless connector_url
      error "Action '#{address}' not found"
      e.fail_block.call({}) if e.fail_block
    else
      returned = false
      failed = false
      caller = ServiceCaller.new(connector_url)

      caller.on :open do
        info "Action '#{address}' starting"
      end

      caller.on :error do
        error "Action '#{address}' dropped the connection"
      end

      caller.on :return do |data|
        returned = true
        success "Action '#{address}' responded"
        caller.close
        block.call(Factor::Common.simple_object_convert(data)) if block
      end

      caller.on :close do
        if !returned && !failed
          error "Action '#{address}' disconnected"
          e.fail_block.call({}) if e.fail_block
        end
      end

      caller.on :fail do |info|
        failed = true
        error "Action '#{address}' failed"
        e.fail_block.call(info) if e.fail_block
      end

      caller.on :log do |log_info|
        @logger.log log_info[:status], log_info
      end

      service_credentials = @credentials[address.service.to_sym] || {}
      caller.action(address.id,params.merge(service_credentials))
    end
  end
  e
end

#success(message) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 167

def success(message)
  @logger.success message
end

#warn(message) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 175

def warn(message)
  @logger.warn message
end

#workflow(service_ref, &block) ⇒ Object 



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# File 'lib/runtime/workflow.rb', line 94

def workflow(service_ref, &block)
  address = ServiceAddress.new(service_ref)
  @workflows ||= {}
  @workflows[address] = block
end