Class: Hydra::Master

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

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 35

def initialize(opts = { })
  opts.stringify_keys!
  config_file = opts.delete('config') { nil }
  if config_file

    begin
      config_erb = ERB.new(IO.read(config_file)).result(binding)
    rescue Exception => e
      raise(YmlLoadError,"config file was found, but could not be parsed with ERB.\n#{$!.inspect}")
    end

    begin
      config_yml = YAML::load(config_erb)
    rescue StandardError => e
      raise(YmlLoadError,"config file was found, but could not be parsed.\n#{$!.inspect}")
    end

    opts.merge!(config_yml.stringify_keys!)
  end
  @files = Array(opts.fetch('files') { nil })
  raise "No files, nothing to do" if @files.empty?
  @incomplete_files = @files.dup
  @workers = []
  @listeners = []
  @stats = Hash.new(0)
  @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 }
  @environment = opts.fetch('environment') { 'test' }

  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

  report_fields = [:tests, :assertions, :errors, :failures]
  report = report_fields.map{|field| "#{field}: #{@stats[field]}"}.join(', ')
  puts report
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 143

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 112

def process_results(worker, message)
  if message.stats
    message.stats.each do |key, value|
      @stats[key] += value
    end
  end

  if message.output =~ /ActiveRecord::StatementInvalid(.*)[Dd]eadlock/ or
     message.output =~ /PGError: ERROR(.*)[Dd]eadlock/ or
     message.output =~ /Mysql::Error: SAVEPOINT(.*)does not exist: ROLLBACK/ or
     message.output =~ /Mysql::Error: Deadlock found/
    trace "Deadlock detected running [#{message.file}]. Will retry at the end"
    @files.push(message.file)
    send_file(worker)
  else
    @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?
      @workers.each do |worker|
        @event_listeners.each{|l| l.worker_end(worker) }
      end

      shutdown_all_workers
    else
      send_file(worker)
    end
  end
end

#send_file(worker) ⇒ Object

Send a file down to a worker.



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# File 'lib/hydra/master.rb', line 100

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

#worker_begin(worker) ⇒ Object

Message handling



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# File 'lib/hydra/master.rb', line 95

def worker_begin(worker)
  @event_listeners.each {|l| l.worker_begin(worker) }
end