Class: SISFC::DataCenter

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/sisfc/data_center.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id:, location_id:, name:, type:, **opts) ⇒ DataCenter

Returns a new instance of DataCenter.

Raises:

  • (ArgumentError) 


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# File 'lib/sisfc/data_center.rb', line 14

def initialize(id:, location_id:, name:, type:, **opts)
  @dcid          = id
  @location_id   = location_id
  @vms           = {}
  @vm_type_count = {}
  @name          = name
  @type          = type
  raise ArgumentError, "Unsupported type!" unless [ :private, :public ].include?(@type)
  @availability_check_proc = opts[:maximum_vm_capacity]
end

Instance Attribute Details

#dcid ⇒ Object (readonly)

Returns the value of attribute dcid.



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# File 'lib/sisfc/data_center.rb', line 12

def dcid
  @dcid
end

#location_id ⇒ Object (readonly)

Returns the value of attribute location_id.



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# File 'lib/sisfc/data_center.rb', line 12

def location_id
  @location_id
end

Instance Method Details

#add_vm(vm, component_name) ⇒ Object

returns false in case no more VMs can be allocated



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# File 'lib/sisfc/data_center.rb', line 26

def add_vm(vm, component_name)
  @vms[component_name] ||= []
  @vm_type_count[vm.size] ||= 0

  raise 'Error! VM is already present!' if @vms[component_name].include? vm

  # defer availablility check to user specified procedure
  if @availability_check_proc
    return false unless @availability_check_proc.call(@vm_type_count)
  end

  # allocate VM
  @vms[component_name] << vm
  @vm_type_count[vm.size] += 1
end

#get_random_vm(component_name) ⇒ Object

returns nil in case no VM for component component_name is running



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# File 'lib/sisfc/data_center.rb', line 51

def get_random_vm(component_name)
  if @vms.has_key? component_name
    @vms[component_name].sample
  end
end

#private? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sisfc/data_center.rb', line 62

def private?
  @type == :private
end

#public? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sisfc/data_center.rb', line 66

def public?
  @type == :public
end

#remove_vm(vm, component_name) ⇒ Object 



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# File 'lib/sisfc/data_center.rb', line 42

def remove_vm(vm, component_name)
  if @vms.has_key? component_name and @vms[component_name].include? vm
    raise 'Error! Inconsistent number of VMs!' unless @vm_type_count[vm.size] >= 1
    @vm_type_count[vm.size] += 1
    @vms.delete(vm)
  end
end

#to_s ⇒ Object 



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# File 'lib/sisfc/data_center.rb', line 57

def to_s
  "Data center #{@dcid}, with VMs:" +
    @vms.inject("") {|s,(k,v)| s += " (#{k}: #{v.size})" }
end