Class: RQ::JobQueue

Inherits:
Object
  • Object
show all
Includes:
Logging, Util
Defined in:
lib/rq/jobqueue.rb

Overview

the JobQueue class is responsible for high level access to the job queue

Defined Under Namespace

Classes: Error

Constant Summary collapse

MAX_JID =
2 ** 20

Constants included from Logging

Logging::DIV0, Logging::DIV1, Logging::DIV2, Logging::DIV3, Logging::EOL, Logging::SEC0, Logging::SEC1, Logging::SEC2, Logging::SEC3

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

#alive?, append_features, #btrace, #columnize, #defval, #emsg, #erreq, #errmsg, #escape, #escape!, #exec, export, #fork, #getopt, #hashify, #hms, #host, #hostname, #klass, #maim, #mcp, #realpath, #stamptime, #system, #timestamp, #tmpnam, #uncache, #which_ruby

Methods included from Logging

append_features

Methods included from Logging::LogMethods

#debug, #error, #fatal, #info, #logerr, #logger, #logger=, #warn

Constructor Details

#initialize(path, opts = {}) ⇒ JobQueue

Returns a new instance of JobQueue.



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
# File 'lib/rq/jobqueue.rb', line 57

def initialize path, opts = {}
#--{{{
  @path = path # do NOT expand this or it'll be fubar from misc nfs mounts!!
  @bin = File::join @path, 'bin' 
  @stdin = File::join @path, 'stdin' 
  @stdout = File::join @path, 'stdout' 
  @stderr = File::join @path, 'stderr' 
  @data = File::join @path, 'data' 
  @opts = opts
  raise "q <#{ @path }> does not exist" unless test ?e, @path
  raise "q <#{ @path }> is not a directory" unless test ?d, @path
  @basename = File::basename(@path)
  @dirname = File::dirname(@path)
  @logger = getopt('logger', opts) || Logger::new(STDERR)
  @qdb = getopt('qdb', opts) || QDB::new(File::join(@path, 'db'), 'logger' => @logger)
  @in_transaction = false
  @in_ro_transaction = false
#--}}}
end

Instance Attribute Details

#binObject (readonly)

Returns the value of attribute bin.



48
49
50
# File 'lib/rq/jobqueue.rb', line 48

def bin
  @bin
end

#dataObject (readonly)

Returns the value of attribute data.



52
53
54
# File 'lib/rq/jobqueue.rb', line 52

def data
  @data
end

#optsObject (readonly)

Returns the value of attribute opts.



53
54
55
# File 'lib/rq/jobqueue.rb', line 53

def opts
  @opts
end

#pathObject (readonly)

Returns the value of attribute path.



47
48
49
# File 'lib/rq/jobqueue.rb', line 47

def path
  @path
end

#qdbObject (readonly) Also known as: db

Returns the value of attribute qdb.



54
55
56
# File 'lib/rq/jobqueue.rb', line 54

def qdb
  @qdb
end

#stderrObject (readonly)

Returns the value of attribute stderr.



51
52
53
# File 'lib/rq/jobqueue.rb', line 51

def stderr
  @stderr
end

#stdinObject (readonly)

Returns the value of attribute stdin.



49
50
51
# File 'lib/rq/jobqueue.rb', line 49

def stdin
  @stdin
end

#stdoutObject (readonly)

Returns the value of attribute stdout.



50
51
52
# File 'lib/rq/jobqueue.rb', line 50

def stdout
  @stdout
end

Class Method Details

.create(path, opts = {}) ⇒ Object

–{{{



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
# File 'lib/rq/jobqueue.rb', line 28

def create path, opts = {}
#--{{{
  FileUtils::rm_rf path
  FileUtils::mkdir_p path
  db = File::join path, 'db'
  qdb = QDB.create db, opts
  opts['qdb'] = qdb
  q = new path, opts
  FileUtils::mkdir_p q.bin
  FileUtils::mkdir_p q.stdin 
  FileUtils::mkdir_p q.stdout
  FileUtils::mkdir_p q.stderr
  FileUtils::mkdir_p q.data
  q
#--}}}
end

Instance Method Details

#[]=(key, value) ⇒ Object

–}}}



923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
# File 'lib/rq/jobqueue.rb', line 923

def []= key, value
#--{{{
  sql = "select count(*) from attributes where key='#{ key }';"
  tuples = @qdb.execute sql
  tuple = tuples.first
  count = Integer tuple['count(*)']
  case count
    when 0
      sql = "insert into attributes values('#{ key }','#{ value }');"
      @qdb.execute sql
    when 1
      sql = "update attributes set key='#{ key }', value='#{ value }' where key='#{ key }';"
      @qdb.execute sql
    else
      raise "key <#{ key }> has become corrupt!"
  end
#--}}}
end

#abort_transaction(*a, &b) ⇒ Object

–}}}



851
852
853
854
855
# File 'lib/rq/jobqueue.rb', line 851

def abort_transaction(*a,&b)
#--{{{
  @qdb.abort_transaction(*a,&b)
#--}}}
end

#attributesObject

–}}}



941
942
943
944
945
946
947
948
# File 'lib/rq/jobqueue.rb', line 941

def attributes 
#--{{{
  h = {}
  tuples = @qdb.execute "select * from attributes;"
  tuples.map!{|t| h[t['key']] = t['value']}
  h
#--}}}
end

#data4(jid) ⇒ Object

–}}}



106
107
108
109
110
# File 'lib/rq/jobqueue.rb', line 106

def data4 jid
#--{{{
  "data/#{ jid }"
#--}}}
end

#data_4(jid) ⇒ Object

–}}}



111
112
113
114
115
# File 'lib/rq/jobqueue.rb', line 111

def data_4 jid
#--{{{
  File::expand_path(File::join(path, data4(jid)))
#--}}}
end

#delete(*args, &block) ⇒ Object

–}}}



538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
# File 'lib/rq/jobqueue.rb', line 538

def delete(*args, &block)
#--{{{
  whats, optargs = args.partition{|arg| not Hash === arg}

  opts = {}
  optargs.each{|oa| opts.update oa}

  force = Util::getopt 'force', opts

  delete_sql, select_sql = '', ''

  whats << 'all' if whats.empty?

  whats.each do |what|
    case "#{ what }"
      when %r/^\s*\d+\s*$/io # number
        delete_sql << "delete from jobs where jid=#{ what } and state!='running';\n"
        select_sql << "select * from jobs where jid=#{ what } and state!='running';\n"
      when %r/^\s*p/io # pending
        delete_sql << "delete from jobs where state='pending';\n"
        select_sql << "select * from jobs where state='pending';\n"
      when %r/^\s*h/io # holding
        delete_sql << "delete from jobs where state='holding';\n"
        select_sql << "select * from jobs where state='holding';\n"
      when %r/^\s*r/io # running
        delete_sql << "delete from jobs where state='running';\n" if force
        select_sql << "select * from jobs where state='running';\n" if force
      when %r/^\s*f/io # finished
        delete_sql << "delete from jobs where state='finished';\n"
        select_sql << "select * from jobs where state='finished';\n"
      when %r/^\s*d/io # dead
        delete_sql << "delete from jobs where state='dead';\n"
        select_sql << "select * from jobs where state='dead';\n"
      when %r/^\s*a/io # all
        delete_sql << "delete from jobs where state!='running';\n"
        select_sql << "select * from jobs where state!='running';\n"
      else
        raise ArgumentError, "cannot delete <#{ what.inspect }>"
    end
  end

  scrub = lambda do |jid|
    [standard_in_4(jid), standard_out_4(jid), standard_err_4(jid), data_4(jid)].each do |path| 
      FileUtils::rm_rf path
    end
  end

  tuples = []

  metablock = 
    if block
      lambda do |tuple|
        jid = tuple['jid']
        block[tuple]
        scrub[jid]
      end
    else
      lambda do |tuple|
        jid = tuple['jid']
        scrub[jid]
        tuples << tuple
      end
    end

# TODO - make file deletion transactional too

  transaction do
    execute(select_sql, &metablock)
    execute(delete_sql){}
  end

  delete_sql = nil
  select_sql = nil

  block ? nil : tuples
#--}}}
end

#execute(*args, &block) ⇒ Object

–}}}



831
832
833
834
835
# File 'lib/rq/jobqueue.rb', line 831

def execute(*args, &block)
#--{{{
  @qdb.execute(*args, &block)
#--}}}
end

#getdeadjobs(started, &block) ⇒ Object

–}}}



769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
# File 'lib/rq/jobqueue.rb', line 769

def getdeadjobs(started, &block)
#--{{{
  ret = nil
  sql = <<-sql
    select * from jobs 
      where 
        state = 'running' and 
        runner='#{ Util::hostname }' and 
        started<='#{ started }'
  sql
  if block
    execute(sql, &block)
  else
    ret = execute(sql)
  end
  ret
#--}}}
end

#getjobObject



724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
# File 'lib/rq/jobqueue.rb', line 724

def getjob
#--{{{
  sql = <<-sql
    select * from jobs 
      where 
        (state='pending' or (state='dead' and (not restartable isnull))) and 
        (runner like '%#{ Util::host }%' or runner isnull)
      order by priority desc, submitted asc, jid asc
      limit 1;
  sql
  tuples = execute sql
  job = tuples.first
  job
#--}}}
end

#integrity_check(*args, &block) ⇒ Object

–}}}



836
837
838
839
840
# File 'lib/rq/jobqueue.rb', line 836

def integrity_check(*args, &block)
#--{{{
  @qdb.integrity_check(*args, &block)
#--}}}
end

#jobisdead(job) ⇒ Object

–}}}



787
788
789
790
791
792
793
794
795
796
# File 'lib/rq/jobqueue.rb', line 787

def jobisdead job
#--{{{
  jid = job['jid']
  if jid
    sql = "update jobs set state='dead' where jid='#{ jid }'"
    execute(sql){}
  end
  job
#--}}}
end

#jobisdone(job) ⇒ Object

–}}}



755
756
757
758
759
760
761
762
763
764
765
766
767
768
# File 'lib/rq/jobqueue.rb', line 755

def jobisdone job
#--{{{
  sql = <<-sql
    update jobs 
      set
        state = '#{ job['state'] }',
        exit_status = '#{ job['exit_status'] }',
        finished = '#{ job['finished'] }',
        elapsed = '#{ job['elapsed'] }'
      where jid = #{ job['jid'] };
  sql
  execute sql
#--}}}
end

#jobisrunning(job) ⇒ Object

–}}}



739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
# File 'lib/rq/jobqueue.rb', line 739

def jobisrunning job 
#--{{{
  sql = <<-sql
    update jobs 
      set
        pid='#{ job['pid'] }',
        state='#{ job['state'] }',
        started='#{ job['started'] }',
        runner='#{ job['runner'] }',
        stdout='#{ job['stdout'] }',
        stderr='#{ job['stderr'] }'
      where jid=#{ job['jid'] };
  sql
  execute sql
#--}}}
end

#list(*whats, &block) ⇒ Object

–}}}



288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
# File 'lib/rq/jobqueue.rb', line 288

def list(*whats, &block)
#--{{{
  ret = nil

  whats.replace(%w( pending running finished dead )) if 
    whats.empty? or whats.include?('all')
    
  whats.map! do |what|
    case what
      when %r/^\s*p/io
        'pending'
      when %r/^\s*h/io
        'holding'
      when %r/^\s*r/io
        'running'
      when %r/^\s*f/io
        'finished'
      when %r/^\s*d/io
        'dead'
      else
        what
    end
  end

  where_clauses = [] 

  whats.each do |what|
    case what
      when Numeric
        where_clauses << "jid=#{ what }\n"
      else
        what = "#{ what }"
        if what.to_s =~ %r/^\s*\d+\s*$/o
          where_clauses << "jid=#{ QDB::q what }\n"
        else
          where_clauses << "state=#{ QDB::q what }\n"
        end
    end
  end

  where_clause = where_clauses.join(" or \n")

  sql = <<-sql
    select * from jobs
    where #{ where_clause } 
  sql

  if block
    ro_transaction{ execute(sql, &block) }
  else
    ret = ro_transaction{ execute(sql) }
  end

  ret
#--}}}
end

#lock(*args, &block) ⇒ Object

–}}}



846
847
848
849
850
# File 'lib/rq/jobqueue.rb', line 846

def lock(*args, &block)
#--{{{
  @qdb.lock(*args, &block)
#--}}}
end

#mtimeObject

TODO - use mtime to optimize checks by feeder??



918
919
920
921
922
# File 'lib/rq/jobqueue.rb', line 918

def mtime
#--{{{
  File::stat(@path).mtime
#--}}}
end

#query(where_clause = nil, &block) ⇒ Object

–}}}



508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
# File 'lib/rq/jobqueue.rb', line 508

def query(where_clause = nil, &block)
#--{{{
  ret = nil

  sql = 
    if where_clause

    #
    # turn =~ into like clauses 
    #
      #where_clause.gsub!(/(=~\s*([^\s')(=]+))/om){q = $2.gsub(%r/'+|\s+/o,''); "like '%#{ q }%'"}
    #
    # quote everything on the rhs of an '=' sign - helps with shell problems...
    #
      #where_clause.gsub!(/(==?\s*([^\s')(=]+))/om){q = $2.gsub(%r/'+|\s+/o,''); "='#{ q }'"}

      "select * from jobs where #{ where_clause };"
    else
      "select * from jobs;"
    end

  if block
    ro_transaction{ execute(sql, &block) }
  else
    ret = ro_transaction{ execute(sql) }
  end

  ret
#--}}}
end

#recover!(*args, &block) ⇒ Object

–}}}



841
842
843
844
845
# File 'lib/rq/jobqueue.rb', line 841

def recover!(*args, &block)
#--{{{
  @qdb.recover!(*args, &block)
#--}}}
end

#resubmit(*jobs, &block) ⇒ Object

–}}}



182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
# File 'lib/rq/jobqueue.rb', line 182

def resubmit(*jobs, &block)
#--{{{
  now = Util::timestamp Time::now

  transaction do
    jobs.each do |job|
      jid = Integer job['jid']
      command = job['command']
      stdin = job['stdin']
      data = job['data']

      raise "no jid for job <#{ job.inspect }>" unless jid 
      raise "no command for job <#{ job.inspect }>" unless command 

      tmp_stdin(stdin) do |ts|
        tuple = QDB::tuple

        tuple['jid']         = jid
        tuple['command']     = command
        tuple['priority']    = job['priority'] || 0
        tuple['tag']         = job['tag']
        tuple['runner']      = job['runner']
        tuple['restartable'] = job['restartable']
        tuple['state']       = 'pending'
        tuple['submitted']   = now
        tuple['submitter']   = Util::hostname
        tuple['stdin']       = stdin4 jid
        tuple['stdout']      = nil
        tuple['stderr']      = nil
        tuple['data']        = data4 jid

        kvs = tuple.fields[1..-1].map{|f| "#{ f }=#{ QDB::q(tuple[ f ]) }"}
        sql = "update jobs set #{ kvs.join ',' } where jid=#{ jid };\n"

        execute(sql){}

        #FileUtils::rm_rf data_4(jid)
=begin
p :job => job
p :ts => ts
p :pwd => Dir.pwd
p :data => data
p :data_4 => data_4(jid)
p :standard_in_4 => standard_in_4(jid)
exit!(1)
=end
        FileUtils::cp ts.path, standard_in_4(jid) if ts

        if data
          FileUtils::cp data, data_4(jid)
        else
          FileUtils::mkdir_p data_4(jid)
        end

        if block
          sql = "select * from jobs where jid = '#{ jid }'"
          execute(sql, &block)
        end
      end # tmp_stdin
    end # jobs.each
  end # transaction
    
  self
#--}}}
end

#ro_transaction(*args) ⇒ Object

–}}}



815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
# File 'lib/rq/jobqueue.rb', line 815

def ro_transaction(*args)
#--{{{
  ret = nil
  if @in_ro_transaction || @in_transaction
    ret = yield
  else
    begin
      @in_ro_transaction = true
      @qdb.ro_transaction(*args){ ret = yield }
    ensure
      @in_ro_transaction = false 
    end
  end
  ret
#--}}}
end

#rollback_transaction(*a, &b) ⇒ Object

–}}}



856
857
858
859
860
# File 'lib/rq/jobqueue.rb', line 856

def rollback_transaction(*a,&b)
#--{{{
  @qdb.rollback_transaction(*a,&b)
#--}}}
end

#snapshot(qtmp = "#{ @basename }.snapshot", retries = nil) ⇒ Object



862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
# File 'lib/rq/jobqueue.rb', line 862

def snapshot qtmp = "#{ @basename }.snapshot", retries = nil 
#--{{{
  qtmp ||= "#{ @basename }.snapshot"
  debug{ "snapshot <#{ @path }> -> <#{ qtmp }>" }
  retries = Integer(retries || 16)
  debug{ "retries <#{ retries }>" }

  qss = nil
  loopno = 0

  take_snapshot = lambda do
    FileUtils::rm_rf qtmp
    FileUtils::mkdir_p qtmp
    %w(db db.schema lock).each do |base|
      src, dest = File::join(@path, base), File::join(qtmp, base)
      debug{ "cp <#{ src }> -> <#{ dest }>" }
      FileUtils::cp(src, dest)
    end
    ss = klass::new qtmp, @opts
    if ss.integrity_check
      ss
    else
      begin; recover! unless integrity_check; rescue; nil; end
      ss.recover!
    end
  end

  loop do
    break if loopno >= retries
    if((ss = take_snapshot.call))
      debug{ "snapshot <#{ qtmp }> created" }
      qss = ss
      break
    else
      debug{ "failure <#{ loopno + 1}> of <#{ retries }> attempts to create snapshot <#{ qtmp }> - retrying..." }
    end
    loopno += 1
  end

  unless qss
    debug{ "locking <#{ @path }> as last resort" }
    @qdb.write_lock do
      if((ss = take_snapshot.call))
        debug{ "snapshot <#{ qtmp }> created" }
        qss = ss
      else
        raise "failed <#{ loopno }> times to create snapshot <#{ qtmp }>"
      end
    end
  end

  qss
#--}}}
end

#standard_err_4(jid) ⇒ Object

–}}}



101
102
103
104
105
# File 'lib/rq/jobqueue.rb', line 101

def standard_err_4 jid
#--{{{
  File::expand_path(File::join(path, stderr4(jid)))
#--}}}
end

#standard_in_4(jid) ⇒ Object

–}}}



81
82
83
84
85
# File 'lib/rq/jobqueue.rb', line 81

def standard_in_4 jid
#--{{{
  File::expand_path(File::join(path, stdin4(jid)))
#--}}}
end

#standard_out_4(jid) ⇒ Object

–}}}



91
92
93
94
95
# File 'lib/rq/jobqueue.rb', line 91

def standard_out_4 jid
#--{{{
  File::expand_path(File::join(path, stdout4(jid)))
#--}}}
end

#status(options = {}) ⇒ Object

–}}}



344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
# File 'lib/rq/jobqueue.rb', line 344

def status options = {}
#--{{{
  stats = OrderedAutoHash::new

  now = Time::now

  hms = lambda do |t|
    elapsed =
      begin
        Float t
      rescue
        now - Util::stamptime(t, 'local' => true)
      end
    sh, sm, ss = Util::hms elapsed.to_f
    s = "#{ '%2.2d' % sh }h#{ '%2.2d' % sm }m#{ '%05.2f' % ss }s" 
  end

  exit_code_map = 
    options[:exit_code_map] || options['exit_code_map'] || {}

  ro_transaction do
  #
  # jobs stats
  #
    total = 0
    %w( pending holding running finished dead ).each do |state|
      sql = <<-sql
        select count(*) from jobs 
          where 
            state='#{ state }'
      sql
      tuples = execute sql 
      tuple = tuples.first
      count = (tuple ? Integer(tuple.first || 0) : 0)
      stats['jobs'][state] = count
      total += count
    end
    stats['jobs']['total'] = total
  #
  # temporal stats 
  #
    metrics = OrderedAutoHash::new
    metrics['pending']  = 'submitted'
    metrics['holding']  = 'submitted'
    metrics['running']  = 'started'
    metrics['finished'] = 'elapsed'
    metrics['dead']     = 'elapsed'

    metrics.each do |state, metric|
      sql = 
        unless metric == 'elapsed'
          <<-sql
            select min(#{ metric }) as max, max(#{ metric }) as min 
              from jobs where state='#{ state }'
          sql
        else
          <<-sql
            select min(#{ metric }) as min, max(#{ metric }) as max 
              from jobs where state='#{ state }'
          sql
        end
      tuple = execute(sql).first
      next unless tuple

      %w( min max ).each do |time|
        oh = nil
        t = tuple[time]
        if t
          sql = <<-sql
            select jid from jobs where #{ metric }='#{ t }' and state='#{ state }'
          sql
          which = execute(sql).first
          jid = (which and which['jid']).to_i
          if jid
            oh = OrderedAutoHash::new
            oh[jid] = hms[t]
            oh.yaml_inline = true
          end
          stats['temporal'][state][time] = oh 
        end
      end
      #stats['temporal'][state] ||= nil
    end
    stats['temporal'] ||= nil
  #
  # generate performance stats
  #
    sql = <<-sql
      select avg(elapsed) from jobs 
        where 
          state='finished'
    sql
    tuples = execute sql 
    tuple = tuples.first
    avg = (tuple ? Float(tuple.first || 0) : 0)
    stats['performance']['avg_time_per_job'] = hms[avg] 

    list = []
    0.step(5){|i| list << (2 ** i)}
    list << 24
    list.sort!

    list = 1, 12, 24

    list.each do |n|
      ago = now - (n * 3600)
      ago = Util::timestamp ago
      sql = <<-sql
        select count(*) from jobs 
          where 
            state = 'finished' and 
            finished  > '#{ ago }'
      sql
      tuples = execute sql 
      tuple = tuples.first
      count = (tuple ? Integer(tuple.first || 0) : 0)
      #stats['performance']["n_jobs_in_last_#{ n }_hrs"] = count
      stats['performance']["n_jobs_in_last_hrs"][n] = count
    end

  #
  # generate exit_status stats
  #
    #stats['exit_status'] = {}
    sql = <<-sql
      select count(*) from jobs 
        where 
          state='finished' and 
          exit_status=0 
    sql
    tuples = execute sql 
    tuple = tuples.first
    successes = (tuple ? Integer(tuple.first || 0) : 0)
    stats['exit_status']['successes'] = successes

    sql = <<-sql
      select count(*) from jobs 
        where 
          (state='finished' and 
          exit_status!=0) or
          state='dead'
    sql
    tuples = execute sql 
    tuple = tuples.first
    failures = (tuple ? Integer(tuple.first || 0) : 0)
    stats['exit_status']['failures'] = failures

    exit_code_map.each do |which, codes|
      exit_status_clause = codes.map{|code| "exit_status=#{ code }"}.join(' or ')
      sql = <<-sql
        select count(*) from jobs 
          where 
            (state='finished' and (#{ exit_status_clause }))
      sql
      tuples = execute sql 
      tuple = tuples.first
      n = (tuple ? Integer(tuple.first || 0) : 0)
      stats['exit_status'][which] = n
    end
  end

  stats
#--}}}
end

#stderr4(jid) ⇒ Object

–}}}



96
97
98
99
100
# File 'lib/rq/jobqueue.rb', line 96

def stderr4 jid
#--{{{
  "stderr/#{ jid }"
#--}}}
end

#stdin4(jid) ⇒ Object

–}}}



76
77
78
79
80
# File 'lib/rq/jobqueue.rb', line 76

def stdin4 jid
#--{{{
  "stdin/#{ jid }"
#--}}}
end

#stdout4(jid) ⇒ Object

–}}}



86
87
88
89
90
# File 'lib/rq/jobqueue.rb', line 86

def stdout4 jid
#--{{{
  "stdout/#{ jid }"
#--}}}
end

#submit(*jobs, &block) ⇒ Object

–}}}



116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
# File 'lib/rq/jobqueue.rb', line 116

def submit(*jobs, &block)
#--{{{
  if jobs.size == 1 and jobs.first.is_a?(String)
    jobs = [ { "command" => jobs.to_s } ]
  end

  now = Util::timestamp Time::now
    
  transaction do
    sql = "select max(jid) from jobs"
    tuple = execute(sql).first
    jid = tuple.first || 0
    jid = Integer(jid) + 1

    jobs.each do |job|
      command = job['command']
      stdin = job['stdin']
      data = job['data']

      raise "no command for job <#{ job.inspect }>" unless command 

      tmp_stdin(stdin) do |ts|
        tuple = QDB::tuple

        tuple['command']     = command 
        tuple['priority']    = job['priority'] || 0
        tuple['tag']         = job['tag']
        tuple['runner']      = job['runner']
        tuple['restartable'] = job['restartable']
        tuple['state']       = 'pending'
        tuple['submitted']   = now
        tuple['submitter']   = Util::hostname
        tuple['stdin']       = stdin4 jid
        tuple['stdout']      = nil 
        tuple['stderr']      = nil 
        tuple['data']       = data4 jid

        values = QDB::q tuple

        sql = "insert into jobs values (#{ values.join ',' });\n"
        execute(sql){}

        FileUtils::rm_rf standard_in_4(jid)
        FileUtils::rm_rf standard_out_4(jid)
        FileUtils::rm_rf standard_err_4(jid)
        FileUtils::rm_rf data_4(jid)
        FileUtils::cp ts.path, standard_in_4(jid) if ts
        if data
          FileUtils::cp_r data, data_4(jid)
        else
          FileUtils::mkdir_p data_4(jid)
        end

        if block
          sql = "select * from jobs where jid = '#{ jid }'"
          execute(sql, &block)
        end
      end

      jid += 1
    end
  end
    
  self
#--}}}
end

#tmp_stdin(stdin = nil) ⇒ Object

–}}}



247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
# File 'lib/rq/jobqueue.rb', line 247

def tmp_stdin stdin = nil
#--{{{
  #stdin = nil if stdin.to_s.empty?
  if stdin.to_s.empty?
    return(block_given? ? yield(nil) : nil) 
  end
  stdin = STDIN if stdin == '-'

  was_opened = false

  begin
    unless stdin.respond_to?('read') or stdin.nil?
      stdin = stdin.to_s
      # relative to queue
      if stdin =~ %r|^@?stdin/\d+$|
        stdin.gsub! %r|^@|, ''
        stdin = File::join(path, stdin)
      end
      stdin = File.expand_path stdin
      stdin = open stdin
      was_opened = true
    end

    tmp = Tempfile::new "#{ Process::pid }_#{ rand }"
    while((buf = stdin.read(8192))); tmp.write buf; end if stdin
    tmp.close

    if block_given?
      begin
        yield tmp
      ensure
        tmp.close!
      end
    else
      return tmp
    end
  ensure
    stdin.close if was_opened rescue nil
  end
#--}}}
end

#transaction(*args) ⇒ Object



798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
# File 'lib/rq/jobqueue.rb', line 798

def transaction(*args)
#--{{{
  raise "cannot upgrade ro_transaction" if @in_ro_transaction
  ret = nil
  if @in_transaction
    ret = yield
  else
    begin
      @in_transaction = true
      @qdb.transaction(*args){ ret = yield }
    ensure
      @in_transaction = false 
    end
  end
  ret
#--}}}
end

#update(kvs, *jids, &block) ⇒ Object

–}}}



620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
# File 'lib/rq/jobqueue.rb', line 620

def update(kvs, *jids, &block)
#--{{{
  ret = nil
#
# yank out stdin - which we allow as a key
#
  stdin = kvs.delete 'stdin'
  data = kvs.delete 'data'
#
# validate/munge state value iff present
#
  if((state = kvs['state']))
    case state
      when %r/^p/io
        kvs['state'] = 'pending'
      when %r/^h/io
        kvs['state'] = 'holding'
      else
        raise "update of <state> = <#{ state }> not allowed (try pending or holding)"
    end
  end
#
# validate kvs pairs
#
  allowed = %w( priority command tag runner restartable )
  kvs.each do |key, val|
    raise "update of <#{ key }> = <#{ val }> not allowed" unless
      (allowed.include?(key)) or (key == 'state' and %w( pending holding ).include?(val))
  end
#
# ensure there are acutally some jobs to update
#
  raise "no jobs to update" if jids.empty?
#
# generates sql to update jids with kvs and sql to show updated tuples
#
  build_sql = 
    lambda do |kvs, jids|
      if(jids.delete('pending'))
        execute("select jid from jobs where state='pending'") do |tuple| 
          jids << tuple['jid']
        end
      end

      if(jids.delete('holding'))
        execute("select jid from jobs where state='holding'") do |tuple| 
          jids << tuple['jid']
        end
      end

      rollback_transaction "no jobs to update" if jids.empty?

      update_clause = kvs.map{|k,v| v ? "#{ k }='#{ v }'" : "#{ k }=NULL" }.join(",\n")
      where_clause = jids.map{|jid| "jid=#{ jid }"}.join(" or\n")
      update_sql = 
        "update jobs\n" <<
        "set\n#{ update_clause }\n" <<
        "where\n(state='pending' or state='holding') and\n(#{ where_clause })"
      select_sql = "select * from jobs where (state='pending' or state='holding') and\n(#{ where_clause })"

      if kvs.empty?
        [ nil, select_sql ]
      else
        [ update_sql, select_sql ]
      end
    end
  #
  # setup stdin
  #
  tmp_stdin(stdin) do |ts|
    clobber_stdin = lambda do |job|
      FileUtils::cp ts.path, standard_in_4(job['jid']) if ts
      true
    end

    clobber_data = lambda do |job|
      if data
        FileUtils::rm_rf data_4(job['jid'])
        FileUtils::cp_r data, data_4(job['jid'])
      end
      true
    end

    tuples = []

    metablock = 
      if block
        lambda{|job| clobber_stdin[job] and clobber_data[job] and block[job]}
      else
        lambda{|job| clobber_stdin[job] and clobber_data[job] and tuples << job}
      end

    transaction do 
      update_sql, select_sql = build_sql[kvs, jids]
      break unless select_sql
      execute(update_sql){} if update_sql
      execute(select_sql, &metablock)
    end

    block ? nil : tuples
  end
#--}}}
end

#vacuumObject

–}}}



615
616
617
618
619
# File 'lib/rq/jobqueue.rb', line 615

def vacuum
#--{{{
  @qdb.vacuum
#--}}}
end