Class: Presto::Metrics::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/presto/metrics/query.rb

Instance Method Summary collapse

Constructor Details

#initialize(client) ⇒ Query 



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# File 'lib/presto/metrics/query.rb', line 13

def initialize(client)
  @client = client
end

Instance Method Details

#count_total_processed_rows(stage) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 109

def count_total_processed_rows(stage)
  rows = stage.tasks.map{|t| t.stats.raw_input_positions }.inject(0, :+)
  rows + stage.sub_stages.map{|ss| count_total_processed_rows(ss) }.inject(0, :+)
end

#find(queryId) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 70

def find(queryId)
  JSON.parse(@client.get_query_json(queryId, "{}"))
end

#find_tasks(sub_stages) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 160

def find_tasks(sub_stages)
  task_list = []
  return task_list unless sub_stages
  sub_stages.each{|ss|
    tl = ss['tasks']
    task_list << tl if tl
    task_list << find_tasks(ss['subStages'])
  }
  task_list.flatten()
end

#format_table(tbl, label, align, sep) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 17

def format_table(tbl, label, align, sep)
  # Compute col length
  col = {}
  label.each_with_index{|l, i| col[i] = l.length}
  tbl.each{|row|
    row.each_with_index {|cell, i| 
      l = cell.to_s.size if cell 
      l ||= 0
      col[i] ||= l
      col[i] = [[col[i], l].max, 150].min
    }
  }
  # print label
  line = []
  label.each_with_index{|l, i|
    line << l.to_s[0..col[i]].ljust(col[i])
  }
  puts line.join(sep)
  tbl.each{|row|
    line = []
    row.each_with_index{|cell, i|
      str = cell.to_s[0..col[i]]
      a = align[i] || 'l'
      case a 
      when 'r'
        line << str.rjust(col[i])
      when 'l'
        line << str.ljust(col[i])
      else
        line << str.ljust(col[i])
      end
    }
    puts line.join(sep)
  }
  0
end

#list ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 54

def list
  ql = query_list
  tbl = ql.map {|q|
    s = q['session'] || {}
    query = q['query'].gsub(/[\t\r\n]/, ' ').gsub(/ {1,}/, ' ').strip
    [q['queryId'], q['elapsedTime'], q['state'], q['runningDrivers'], q['completedDrivers'], q['totalDrivers'], s['user'], s['catalog'], s['schema'], s['source'], query]
  }.sort_by{|row| row[0]}.reverse

  format_table(
    tbl, 
    :label => %w|query time state r f t user catalog schema source sql|,
    :align => %w|r     r    r     r r r l    l       r      l      l  |,
  :sep => ' '
  )
end

#metrics ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 134

def metrics 
       ql = query_list
       ql.map{|qi|
h = {}
h['query_id'] = qi['queryId'] || ''
h['state'] = qi['state'] || ''
session = qi['session'] || {}
h['source'] = session['source'] || ''
h['user'] = session['user'] || h['source'].gsub(/[^a-zA-Z0-9]/,'')
h['running_drivers'] = qi['runningDrivers'] || 0
h['queued_drivers'] = qi['queuedDrivers'] || 0
h['completed_drivers'] = qi['completedDrivers'] || 0
h['total_drivers'] = qi['totalDrivers'] || 0
h['elapsed_time'] = qi['elapsedTime'] || '0.0m'
h['create_time'] = qi['createTime']
h['running_time'] = qi['endTime'] || Time.now.utc.iso8601(3)
#if(h['state'] == "FAILED")
# h['errorCode'] = find(h['query_id'])['errorCode'] || {}
#end
h
       }
end

#processed_rows(query_id) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 114

def processed_rows(query_id)
  qi = QueryInfo.decode(find(query_id))
  count_total_processed_rows(qi.output_stage)
end

#query_list(path = "") ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 96

def query_list(path="")
  JSON.parse(@client.get_query_json(path))
end

#query_progress ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 119

def query_progress
  running_queries = query_list.map{|q| QueryInfo.decode(q) }.select{|q| q.state == :running }
   query_info = running_queries.map{|q|
    queryInfo = find(q.query_id)
    QueryInfo.decode(queryInfo)
  }

  result = {}
  query_info.each{|q|
     os = q.output_stage
     result[q.query_id] = count_total_processed_rows(os)
  }
  result
end

#running_list ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 100

def running_list
     ql = query_list.select{|q| q['state'] == 'RUNNING'}.sort_by{|row| row[0]}.reverse
     ql.each{|q|
       tasks(q['queryId'])
     }
     ql.size
end

#task_list(queryId) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 74

def task_list(queryId)
       qj = find(queryId) || {}
  root_stage = qj['outputStage'] || []
  tasks = root_stage['tasks'] || []
  tasks << find_tasks(root_stage['subStages'])
  tasks.flatten
end

#tasks(queryId) ⇒ Object 



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# File 'lib/presto/metrics/query.rb', line 82

def tasks(queryId)
  tl = task_list(queryId)
  stats = tl.map {|t|
    s = t['stats']
    host = (t['self'] || '').sub(/http:\/\/([a-z0-9\-.]+[\/:][0-9]+)\/.*/, '\1')
    [t['taskId'], host, t['state'], s['rawInputPositions'], s['rawInputDataSize'], s['queuedDrivers'], s['runningDrivers'], s['completedDrivers']]
  }
  format_table(stats,
               :label => %w|task_id host    state processed_rows size|,
               :align => %w|l       l       l     r          r|,
         :sep => ' '
  )
end