Class: Hydra::Master

Inherits:
Object
  • Object
show all
Includes:
Hydra::Messages::Master, Open3
Defined in:
lib/hydra/master.rb

Overview

Hydra class responsible for delegate work down to workers.

The Master is run once for any given testing session.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = { }) ⇒ Master

Create a new Master

Options:

  • :files

    • An array of test files to be run. These should be relative paths from the root of the project, since they may be run on different machines which may have different paths.

  • :workers

    • An array of hashes. Each hash should be the configuration options for a worker.

  • :listeners

    • An array of Hydra::Listener objects. See Hydra::Listener::MinimalOutput for an example listener

  • :verbose

    • Set to true to see lots of Hydra output (for debugging)

  • :autosort

    • Set to false to disable automatic sorting by historical run-time per file



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# File 'lib/hydra/master.rb', line 29

def initialize(opts = { })
  opts.stringify_keys!
  config_file = opts.delete('config') { nil }
  if config_file
    opts.merge!(YAML.load_file(config_file).stringify_keys!)
  end
  @files = Array(opts.fetch('files') { nil })
  raise "No files, nothing to do" if @files.empty?
  @incomplete_files = @files.dup
  @workers = []
  @listeners = []
  @event_listeners = Array(opts.fetch('listeners') { nil } )
  @event_listeners.select{|l| l.is_a? String}.each do |l|
    @event_listeners.delete_at(@event_listeners.index(l))
    listener = eval(l)
    @event_listeners << listener if listener.is_a?(Hydra::Listener::Abstract)
  end
  @verbose = opts.fetch('verbose') { false }
  @autosort = opts.fetch('autosort') { true }
  @sync = opts.fetch('sync') { nil }

  if @autosort
    sort_files_from_report 
    @event_listeners << Hydra::Listener::ReportGenerator.new(File.new(heuristic_file, 'w'))
  end

  # default is one worker that is configured to use a pipe with one runner
  worker_cfg = opts.fetch('workers') { [ { 'type' => 'local', 'runners' => 1} ] }

  trace "Initialized"
  trace "  Files:   (#{@files.inspect})"
  trace "  Workers: (#{worker_cfg.inspect})"
  trace "  Verbose: (#{@verbose.inspect})"

  @event_listeners.each{|l| l.testing_begin(@files) }

  boot_workers worker_cfg
  process_messages
end

Instance Attribute Details

#report_text ⇒ Object (readonly)

A text report of the time it took to run each file



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# File 'lib/hydra/master.rb', line 96

def report_text
  @report_text
end

Instance Method Details

#process_results(worker, message) ⇒ Object

Process the results coming back from the worker.



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# File 'lib/hydra/master.rb', line 84

def process_results(worker, message)
  @incomplete_files.delete_at(@incomplete_files.index(message.file))
  trace "#{@incomplete_files.size} Files Remaining"
  @event_listeners.each{|l| l.file_end(message.file, message.output) }
  if @incomplete_files.empty?
    shutdown_all_workers
  else
    send_file(worker)
  end
end

#send_file(worker) ⇒ Object

Send a file down to a worker.



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# File 'lib/hydra/master.rb', line 72

def send_file(worker)
  f = @files.shift
  if f
    trace "Sending #{f.inspect}"
    @event_listeners.each{|l| l.file_begin(f) }
    worker[:io].write(RunFile.new(:file => f))
  else
    trace "No more files to send"
  end
end