Class: Jerakia::Datasource

Inherits:
Object
  • Object
show all
Defined in:
lib/jerakia/datasource.rb,
lib/jerakia/datasource/file.rb,
lib/jerakia/datasource/http.rb,
lib/jerakia/datasource/dummy.rb,
lib/jerakia/datasource/file/json.rb,
lib/jerakia/datasource/file/yaml.rb

Defined Under Namespace

Modules: Dummy, File, Http

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, lookup, opts) ⇒ Datasource

Returns a new instance of Datasource.



9
10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/jerakia/datasource.rb', line 9

def initialize(name, lookup, opts)
  @response = Jerakia::Response.new(lookup)
  @options = opts
  @lookup = lookup
  @name = name
  begin
    require "jerakia/datasource/#{name.to_s}"
    eval "extend Jerakia::Datasource::#{name.to_s.capitalize}"
  rescue LoadError => e
    raise Jerakia::Error, "Cannot load datasource #{name.to_s} in lookup #{lookup.name}, #{e.message}"
  end
end

Instance Attribute Details

#lookup ⇒ Object (readonly)

Returns the value of attribute lookup.



7
8
9
 
# File 'lib/jerakia/datasource.rb', line 7

def lookup
  @lookup
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



6
7
8
 
# File 'lib/jerakia/datasource.rb', line 6

def options
  @options
end

#response ⇒ Object (readonly)

Returns the value of attribute response.



5
6
7
 
# File 'lib/jerakia/datasource.rb', line 5

def response
  @response
end

Instance Method Details

#option(opt, data = {}) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/jerakia/datasource.rb', line 28

def option(opt, data={})
  if @options[opt].nil? and data.key?(:default)
    @options[opt] = data[:default]
  end
  
  Jerakia.log.debug("[#{whoami}]: options[#{opt}] to #{options[opt]} [#{options[opt].class}]")
  if @options[opt].nil?
    raise Jerakia::PolicyError, "#{opt} option must be supplied for datasource #{@name} in lookup #{lookup.name}" if data[:mandatory]
  else 
    if data[:type]
      if Array(data[:type]).select { |t| @options[opt].is_a?(t) }.empty?
        raise Jerakia::PolicyError, 
          "#{opt} is a #{@options[opt].class} but must be a #{data[:type].to_s}  for datasource #{@name} in lookup #{lookup.name}"
      end
    end
  end
end

#whoami ⇒ Object

used for verbose logging



24
25
26
 
# File 'lib/jerakia/datasource.rb', line 24

def whoami
  "datasource=#{@name}  lookup=#{@lookup.name}"
end