Class: Grifter

Inherits:
Object show all
Includes:
Configuration, Instrumentation
Defined in:
lib/grifter.rb,
lib/grifter/log.rb,
lib/grifter/helpers.rb,
lib/grifter/http_service.rb,
lib/grifter/json_helpers.rb,
lib/grifter/configuration.rb,
lib/grifter/instrumentation.rb

Defined Under Namespace

Modules: Configuration, Helpers, Instrumentation, JsonHelpers, Log Classes: HTTPService, RequestException

Constant Summary collapse

DefaultConfigOptions = 
{
  #TODO: service_config: nil,
  grift_globs: ['*_grifts/**/*_grifts.rb'],
  authenticate: false,
  load_from_config_file: true,
  services: {},
  instrumentation: false,
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Instrumentation

#metrics_all_requests, #start_instrumentation

Methods included from Configuration

#get_service_config_from_url, #load_config_file, #normalize_config, #recursive_symbolize

Constructor Details

#initialize(options = {}) ⇒ Grifter

Returns a new instance of Grifter.



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# File 'lib/grifter.rb', line 19

def initialize options={}
  options = DefaultConfigOptions.merge(options)
  @config = if options[:load_from_config_file]
              options.merge load_config_file(options)
            else
              options
            end

  #setup the services
  @services = []
  @config[:services].each_pair do |service_name, service_config|
    service = HTTPService.new(service_config)
    define_singleton_method service_name.intern do
      service
    end
    @services << service
  end

  #setup the grifter methods if any
  if @config[:grift_globs]
    @config[:grift_globs].each do |glob|
      Dir[glob].each do |grifter_file|
        load_grifter_file grifter_file
      end
    end
  end

  if @config[:authenticate]
    self.grifter_authenticate_do
  end

  start_instrumentation if @config[:instrumentation] = true
end

Instance Attribute Details

#services ⇒ Object (readonly)

Returns the value of attribute services.



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# File 'lib/grifter.rb', line 53

def services
  @services
end

Instance Method Details

#grifter_authenticate_do ⇒ Object

calls all methods that end with grifter_authenticate



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# File 'lib/grifter.rb', line 81

def grifter_authenticate_do
  auth_methods = self.singleton_methods.select { |m| m =~ /grifter_authenticate$/ }
  auth_methods.each do |m|
    Log.debug "Executing a grifter_authentication on method: #{m}"
    self.send(m)
  end
end

#grifter_configuration ⇒ Object

this allows configuration to be accessed in grift scripts



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# File 'lib/grifter.rb', line 56

def grifter_configuration
  @config.clone
end

#load_grifter_file(filename) ⇒ Object 



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# File 'lib/grifter.rb', line 60

def load_grifter_file filename
  Log.debug "Loading extension file '#{filename}'"
  #by evaling in a anonymous module, we protect this class's namespace
  anon_mod = Module.new
  with_local_load_path File.dirname(filename) do
    anon_mod.class_eval(IO.read(filename), filename, 1)
  end
  self.extend anon_mod
end

#run_script_file(filename) ⇒ Object 



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# File 'lib/grifter.rb', line 70

def run_script_file filename
  Log.info "Running data script '#{filename}'"
  raise "No such file '#{filename}'" unless File.exist? filename
  #by running in a anonymous class, we protect this class's namespace
  anon_class = BlankSlate.new(self)
  with_local_load_path File.dirname(filename) do
    anon_class.instance_eval(IO.read(filename), filename, 1)
  end
end