Class: Rigger::TaskExecutor

Inherits:
Object
  • Object
show all
Defined in:
lib/rigger/task_executor.rb

Defined Under Namespace

Classes: SFTPTransferWrapper

Instance Method Summary collapse

Constructor Details

#initialize(task, servers, execution_service, config) ⇒ TaskExecutor

Returns a new instance of TaskExecutor.



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# File 'lib/rigger/task_executor.rb', line 33

def initialize(task, servers, execution_service, config)
  @task              = task
  @current_servers   = servers
  @execution_service = execution_service
  @config            = config
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 40

def call
  instance_eval(&@task.block)
end

#capture(command) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 62

def capture(command)
  "".tap do |captured|
    execute(command, [@current_servers.first]) do |ch|
      ch.on_data do |c, data|
        captured << data
      end

      ch.on_extended_data do |c, type, data|
        data.split("\n").each do |line|
          $stderr.puts " ** [#{@current_servers.first.connection_string} :: stderr] #{line}"
          $stderr.flush
        end
      end
    end
  end
end

#capture_all(command) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 79

def capture_all(command)
  {:stdout => "", :stderr => ""}.tap do |captured|
    execute(command, [@current_servers.first]) do |ch|
      ch.on_data do |c, data|
        captured[:stdout] << data
      end

      ch.on_extended_data do |c, type, data|
        captured[:stderr] << data
      end
    end
  end
end

#erl_call(cookie, node, code) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 93

def erl_call(cookie, node, code)
  streams = capture_all("echo '#{code}' | erl_call -e -c #{cookie} -n #{node}")

  if !streams[:stderr].empty?
    raise CommandError, "erl_call #{code} failed on #{@current_servers.first.connection_string}: #{streams[:stderr]}"
  end

  if !streams[:stdout].include?('{ok,')
    raise CommandError, "erl_call #{code} failed on #{@current_servers.first.connection_string}: #{streams[:stdout]}"
  end
end

#fetch(name, default) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 138

def fetch(name, default)
  @config.fetch(name, default)
end

#get(name) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 130

def get(name)
  @config.get(name)
end

#put(data, path) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 142

def put(data, path)
  servers  = @current_servers.dup
  channels = servers.map do |s|
    callback = Proc.new do |channel, name, sent, total|
      puts "[#{channel[:host]}] #{name}" if sent == 0
    end

    SFTPTransferWrapper.new(s.connection) do |sftp|
      io = StringIO.new(data.respond_to?(:read) ? data.read : data)
      sftp.upload(io, path, {}) do |status, we|
        if status == :finish
          sftp.close_channel
        end
      end
    end
  end

  puts "  * transerring data to #{path}"

  connections = servers.dup

  failing_servers = []
  errors          = []

  loop do
    connections.delete_if do |server|
      begin
        !server.connection.process(0.1) { |s| s.busy? }
      rescue Net::SFTP::StatusException => e
        failing_servers << server
        errors << e.message
      end
    end
    break if connections.empty?
  end

  if !failing_servers.empty?
    raise CommandError, "Upload failed on #{failing_servers.map { |s| s.connection_string }.inspect} with #{errors.join(", ")}."
  end

  puts "  * finished"
end

#run(command) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 44

def run(command)
  execute(command, @current_servers) do |ch|
    ch.on_data do |c, data|
      data.split("\n").each do |line|
        $stdout.puts" ** [#{ch[:host]} :: stdout] #{line}"
        $stdout.flush
      end
    end

    ch.on_extended_data do |c, type, data|
      data.split("\n").each do |line|
        $stderr.puts" ** [#{ch[:host]} :: stderr] #{line}"
        $stderr.flush
      end
    end
  end
end

#run_locally(command) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 109

def run_locally(command)
  puts "  * executing `#{command}` locally"
  status = POpen4.popen4(command) do |stdout, stderr, stdin, pid|
    stdout.each_line do |line|
      $stdout.puts " ** [locally :: stdout] #{line}"
      $stdout.flush
    end

    stderr.each_line do |line|
      $stderr.puts " ** [locally :: stderr] #{line}"
      $stderr.flush
    end
  end

  if status && status.exitstatus == 0
    puts "  * command finished"
  else
    raise CommandError, "Local command `#{command}` failed."
  end
end

#run_task(task_name) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 105

def run_task(task_name)
  @execution_service.call(task_name)
end

#set(name, value) ⇒ Object 



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# File 'lib/rigger/task_executor.rb', line 134

def set(name, value)
  @config.set(name, value)
end