Class: Embulk::InputJstat

Inherits:
InputPlugin
  • Object
show all
Defined in:
lib/embulk/input/jstat.rb

Constant Summary collapse

JSTAT_COLUMNS =

output columns of jstat (JDK8)

{
  class: {
    Loaded: 'int',
    Bytes: 'double',
    Unloader: 'int',
    Bytes: 'double',
    Time: 'double'
  },
  compiler: {
    Compiled: 'int',
    Failed: 'int',
    Invalid: 'int',
    Time: 'double',
    FailedType: 'int',
    FailedMethod: 'string'
  },
  gc: {
    S0C: 'double',
    S1C: 'double',
    S0U: 'double',
    S1U: 'double',
    EC: 'double',
    EU: 'double',
    OC: 'double',
    MC: 'double',
    MU: 'double',
    CCSC: 'double',
    CCSU: 'double',
    YGC: 'int',
    YGCT: 'double',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double'
  },
  gccause: {
    S0: 'double',
    S1: 'double',
    E: 'double',
    O: 'double',
    M: 'double',
    CCS: 'double',
    YGC: 'int',
    YGCT: 'double',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double',
    LGCC: 'string',
    GCC: 'string'
  },
  gcnew: {
    S0C: 'double',
    S1C: 'double',
    S0U: 'double',
    S1U: 'double',
    TT: 'int',
    MTT: 'double',
    DSS: 'double',
    EC: 'double',
    EU: 'double',
    YGC: 'int',
    YGCT: 'double'
  },
  gcnewcapacity: {
    NGCMN: 'double',
    NGCMX: 'double',
    NGC: 'double',
    S0CMX: 'double',
    S0C: 'double',
    S1CMX: 'double',
    S1C: 'double',
    ECMX: 'double',
    EC: 'double',
    YGC: 'int',
    FGC: 'int'
  },
  gcold: {
    MC: 'double',
    MU: 'double',
    CCSC: 'double',
    CCSU: 'double',
    OC: 'double',
    OU: 'double',
    YGC: 'int',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double'
  },
  gcoldcapacity: {
    OGCMN: 'double',
    OGCMX: 'double',
    OGC: 'double',
    OC: 'double',
    YGC: 'int',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double'
  },
  gcmetacapacity: {
    MCMN: 'double',
    MCMX: 'double',
    MC: 'double',
    CCSMN: 'double',
    CCSMX: 'double',
    CCSC: 'double',
    YGC: 'int',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double'
  },
  gcutil: {
    S0: 'double',
    S1: 'double',
    E: 'double',
    O: 'double',
    M: 'double',
    CCS: 'double',
    YGC: 'int',
    YGCT: 'double',
    FGC: 'int',
    FGCT: 'double',
    GCT: 'double'
  },
  printcompilation: {
    Compiled: 'int',
    Size: 'int',
    Type: 'int',
    Method: 'string'
  }
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(task, schema, index, page_builder) ⇒ InputJstat

Returns a new instance of InputJstat.



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# File 'lib/embulk/input/jstat.rb', line 188

def initialize(task, schema, index, page_builder)
  super
end

Class Method Details

.transaction(config, &control) ⇒ Object 



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# File 'lib/embulk/input/jstat.rb', line 140

def self.transaction(config, &control)
  # find jstat files and push to "task".
  paths = config.param('paths', :array, default: ['/tmp']).map do |path|
    next [] unless Dir.exists?(path)
    Dir.entries(path).sort.select do |f|
      f =~ /^.+\.log$/
    end.map do |file|
      File.expand_path(File.join(path, file))
    end
  end.flatten
  # remove checked jstat files by other threads.
  paths -= config.param('done', :array, default: [])
  task = {'paths' => paths}

  # generate schema by parsing a given options of jstat.
  option = config.param('option', :string, default: 'gcutil')
  option[0] = '' if option =~ /^\-/
  unless JSTAT_COLUMNS.has_key?(option.to_sym)
    raise "Wrong configuration: \"option: #{option}\". Specify a stat option of jstat correctly."
  end

  timestamp = config.param('timestamp', :bool, default: false)

  i = timestamp ? 1 : 0
  columns = JSTAT_COLUMNS[option.to_sym].each.with_index(i).map do |column, index|
    stat, type = column
    case type
    when 'string'
      Column.new(index, stat.to_s, :string)
    when 'int', 'long'
      Column.new(index, stat.to_s, :long)
    when 'double', 'float'
      Column.new(index, stat.to_s, :double)
    end
  end

  if timestamp
    columns.unshift(Column.new(0, 'Timestamp', :double))
  end

  #TODO: Now, force to set threads as amount of found files. Need a better idea.
  report = yield(task, columns, paths.length)

  config.merge( report['done'].flatten.compact )

  return {}
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/embulk/input/jstat.rb', line 192

def run
  # if no path, returns empty.
  unless path = @task['paths'][@index]
    return { 'done' => [] }
  end

  File.read(path).each_line.with_index(0) do |line, i|
    stats = line.strip.split(/\s+/)

    # maybe not jstat file if a number of column is not match.
    if stats.size != @schema.size
      # if not header, maybe injected other log, e.g. console.
      i == 0 ? break : next
    end

    # ignore column heading line
    next if i == 0 && stats[0] == @schema[0]['name']

    page = []
    @schema.each_with_index do |s, i|
      case s['type']
      when :string
        page << stats[i]
      # TODO: If not numeric, raise error.
      when :long
        page << stats[i].to_i
      when :double
        page << stats[i].to_f
      else
        raise "unknown type: #{s['type']}"
      end
    end
    @page_builder.add(page)
  end
  @page_builder.finish

  {  # commit report
    'done' => path
  }
end