Class: Node

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

Direct Known Subclasses

AdvancedNode, SimpleNode

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, cloud, roles = []) ⇒ Node

Returns a new instance of Node.



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# File 'lib/node_layout.rb', line 556

def initialize id, cloud, roles=[]
  # For Xen/KVM id is the public ip address
  # For clouds, id is node-X since the ip is not known
  @id = id
  @cloud = cloud
  @roles = roles.map { |r| r.to_sym }

  expand_roles
end

Instance Attribute Details

#cloud ⇒ Object

Returns the value of attribute cloud.



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# File 'lib/node_layout.rb', line 554

def cloud
  @cloud
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/node_layout.rb', line 554

def id
  @id
end

#roles ⇒ Object

Returns the value of attribute roles.



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# File 'lib/node_layout.rb', line 554

def roles
  @roles
end

Instance Method Details

#add_db_role(db_type, is_master) ⇒ Object 



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# File 'lib/node_layout.rb', line 566

def add_db_role db_type, is_master
  if is_master
    add_role :db_master
    add_role :zookeeper
  else
    add_role :db_slave
  end
end

#add_rabbitmq_role(is_master) ⇒ Object 



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# File 'lib/node_layout.rb', line 575

def add_rabbitmq_role is_master
  if is_master
    add_role :rabbitmq_master
  else
    add_role :rabbitmq_slave
  end
end

#add_role(role) ⇒ Object 



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# File 'lib/node_layout.rb', line 583

def add_role role
  @roles << role.to_sym
  expand_roles
end

#errors ⇒ Object 



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# File 'lib/node_layout.rb', line 599

def errors
  @roles.map { |r| "Invalid role: #{r}" if !VALID_ROLES.include?(r) }.compact
end

#expand_roles ⇒ Object 



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# File 'lib/node_layout.rb', line 603

def expand_roles
  error_msg = "Expand roles should never be called on a node type." + \
    " All nodes should be either a SimpleNode or AdvancedNode"
  raise RuntimeError error_msg
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/node_layout.rb', line 595

def valid?
  self.errors.empty?
end