Class: FC::Policy

Inherits:
DbBase show all
Defined in:
lib/fc/policy.rb

Class Attribute Summary collapse

Attributes inherited from DbBase

#database_fields, #id

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from DbBase

create_from_fiels, #delete, find, #initialize, #reload, #save, set_table, where

Constructor Details

This class inherits a constructor from FC::DbBase

Class Attribute Details

.storages_cache_time ⇒ Object

Returns the value of attribute storages_cache_time.



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# File 'lib/fc/policy.rb', line 8

def storages_cache_time
  @storages_cache_time
end

Class Method Details

.filter_by_host(host = nil) ⇒ Object 



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# File 'lib/fc/policy.rb', line 12

def self.filter_by_host(host = nil)
  host = FC::Storage.curr_host unless host
  self.where.select do |policy|
    policy.get_create_storages.detect{|storage| storage.host == host}
  end
end

Instance Method Details

#get_copy_storages ⇒ Object 



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# File 'lib/fc/policy.rb', line 26

def get_copy_storages
  return @copy_storages_cache if @copy_storages_cache && Time.new.to_i - @get_copy_storages_time.to_i < self.class.storages_cache_time
  @get_copy_storages_time = Time.new.to_i
  names = copy_storages.split(',').map{|s| "'#{s}'"}.join(',')
  @copy_storages_cache = FC::Storage.where("name IN (#{names}) ORDER BY FIELD(name, #{names})")
end

#get_create_storages ⇒ Object 



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# File 'lib/fc/policy.rb', line 19

def get_create_storages
  return @create_storages_cache if @create_storages_cache && Time.new.to_i - @get_create_storages_time.to_i < self.class.storages_cache_time
  @get_create_storages_time = Time.new.to_i
  names = create_storages.split(',').map{|s| "'#{s}'"}.join(',')
  @create_storages_cache = FC::Storage.where("name IN (#{names}) ORDER BY FIELD(name, #{names})")
end

#get_proper_storage_for_copy(size, copy_id = nil, exclude = []) ⇒ Object

get available storage for copy by copy_id and size



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# File 'lib/fc/policy.rb', line 41

def get_proper_storage_for_copy(size, copy_id = nil, exclude = [])
  storages = get_copy_storages
  start_storage_index = nil
  storages.each_with_index do |s, i|
    start_storage_index = i if copy_id.to_i == s.copy_id.to_i && !exclude.include?(s.name)
  end
  storages = storages[start_storage_index..-1]+storages[0..start_storage_index-1] if storages.size > 0 && start_storage_index
  storages = storages.select do |storage|
    !exclude.include?(storage.name) && storage.up? && storage.size + size < storage.size_limit
  end
  storage = storages.detect{|s| copy_id.to_i == s.copy_id.to_i}
  storage = storages.detect{|s| copy_id.to_i < s.copy_id.to_i} unless storage
  storage = storages.first unless storage
  storage
end

#get_proper_storage_for_create(size, exclude = []) ⇒ Object

get available storage for create by size



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# File 'lib/fc/policy.rb', line 34

def get_proper_storage_for_create(size, exclude = [])
  get_create_storages.detect do |storage|
    !exclude.include?(storage.name) && storage.up? && storage.size + size < storage.size_limit
  end
end