Class: SwitchTower::Actor::Task

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

Overview

Represents the definition of a single task.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, actor, options) ⇒ Task

Returns a new instance of Task.



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# File 'lib/switchtower/actor.rb', line 74

def initialize(name, actor, options)
  @name, @actor, @options = name, actor, options
  @servers = nil
end

Instance Attribute Details

#actor ⇒ Object (readonly)

:nodoc:



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# File 'lib/switchtower/actor.rb', line 72

def actor
  @actor
end

#name ⇒ Object (readonly)

:nodoc:



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# File 'lib/switchtower/actor.rb', line 72

def name
  @name
end

#options ⇒ Object (readonly)

:nodoc:



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# File 'lib/switchtower/actor.rb', line 72

def options
  @options
end

Instance Method Details

#servers ⇒ Object

Returns the list of servers (not connections to servers) that are the target of this task.



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# File 'lib/switchtower/actor.rb', line 81

def servers
  unless @servers
    roles = [*(@options[:roles] || actor.configuration.roles.keys)].
      map { |name|
        actor.configuration.roles[name] or
          raise ArgumentError, "task #{self.name.inspect} references non-existant role #{name.inspect}"
      }.flatten
    only  = @options[:only] || {}

    unless only.empty?
      roles = roles.delete_if do |role|
        catch(:done) do
          only.keys.each do |key|
            throw(:done, true) if role.options[key] != only[key]
          end
          false
        end
      end
    end

    @servers = roles.map { |role| role.host }.uniq
  end

  @servers
end