Difference between revisions of "Proposals:Logging"

From KitwarePublic
Jump to navigationJump to search
m (Reverted edit of Sss12, changed back to last version by Andy)
m
Line 1: Line 1:
= Requirements =
+
[http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=18 cheap diazepam] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=312 cheap xenical] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=45 nokia ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=285 qwest ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=79 zanaflex online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=247 diazepam online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=305 verizon ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-226682379944.html free motorola ringtones] [http://climate.msrc.sunysb.edu/1984/messages/318.html order lortab] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=62 prozac online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=21 ericsson ringtones] [http://climate.msrc.sunysb.edu/1984/messages/330.html but ortho] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,19 cheap cyclobenzaprine] [http://climate.msrc.sunysb.edu/1984/messages/295.html cheap celexa] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=253 free ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=49 phentermine] [http://climate.msrc.sunysb.edu/1984/messages/300.html free cool ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=52 cheap prozac] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,44 free qwest ringtones] [http://climate.msrc.sunysb.edu/1984/messages/296.html cialis online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=297 sprint ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=60 nexium online] [http://climate.msrc.sunysb.edu/1984/messages/339.html real ringtones] [http://climate.msrc.sunysb.edu/1984/messages/341.html sagem ringtones] [http://climate.msrc.sunysb.edu/1984/messages/351.html tracfone ringtones] [http://climate.msrc.sunysb.edu/1984/messages/328.html free nokia ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=284 free punk ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-226172687200.html mp3 ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=295 sony ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,12 ativan online] [http://climate.msrc.sunysb.edu/1984/messages/309.html but hgh] [http://climate.msrc.sunysb.edu/1984/messages/320.html free midi ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=7 alltel ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=23 cheap flexeril] [http://climate.msrc.sunysb.edu/1984/messages/346.html sony ericsson ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=39 motorola ringtones] [http://climate.msrc.sunysb.edu/1984/messages/359.html vicodin online] [http://www.bc.edu/apps/bookstore/cards/jun7-226062830562.html free tracfone ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=42 buy soma] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=260 levitra online] [http://climate.msrc.sunysb.edu/1984/messages/322.html free motorola ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=19 cheap didrex] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=84 cheap sildenafil] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=48 pharmacy online online] [http://climate.msrc.sunysb.edu/1984/messages/366.html zoloft online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=257 hydrocodone online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=63 free sony ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=82 cingular ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=306 viagra] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=47 buy paxil] [http://climate.msrc.sunysb.edu/1984/messages/292.html ambien online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=264 buy lortab] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=28 order hydrocodone] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=85 vigrx online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=10 cheap ativan] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=26 hgh online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=63 sildenafil online] [http://climate.msrc.sunysb.edu/1984/messages/358.html buy viagra] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=71 ortho online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=44 nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/316.html lisinopril] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,24 free funny ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,46 free sony ericsson ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=307 buy vicodin] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,25 hydrocodone] [http://climate.msrc.sunysb.edu/1984/messages/293.html order ativan] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=38 mono ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,18 clonazepam] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=31 levitra] [http://climate.msrc.sunysb.edu/1984/messages/349.html free sprint ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=49 cialis online] [http://climate.msrc.sunysb.edu/1984/messages/347.html sony ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,26 cheap levitra] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=313 zanaflex online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=44 phentermine] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=12 celexa online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=69 ultracet online] [http://climate.msrc.sunysb.edu/1984/messages/362.html wwe ringtones] [http://climate.msrc.sunysb.edu/1984/messages/343.html free sharp ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,36 buy norco] [http://climate.msrc.sunysb.edu/1984/messages/345.html soma online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=61 cheap ultracet] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=242 free cingular ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=232 cheap adipex] [http://climate.msrc.sunysb.edu/1984/messages/364.html cheap xenical] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=6 cheap albuterol] [http://climate.msrc.sunysb.edu/1984/messages/350.html cheap tenuate] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=83 cheap ortho] [http://climate.msrc.sunysb.edu/1984/messages/325.html free music ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=288 sagem ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=262 cheap lisinopril] [http://climate.msrc.sunysb.edu/1984/messages/319.html meridia online] [http://climate.msrc.sunysb.edu/1984/messages/335.html cheap propecia] [http://climate.msrc.sunysb.edu/1984/messages/360.html cheap vigrx] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=20 cheap diethylpropion] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=233 cheap albuterol] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=40 mp3 ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=265 meridia online] [http://climate.msrc.sunysb.edu/1984/messages/307.html free ringtones] [http://climate.msrc.sunysb.edu/1984/messages/354.html cheap ultram] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=61 soma online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=35 cheap lortab] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=292 cheap sildenafil] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,34 free nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/317.html cheap lorazepam] [http://climate.msrc.sunysb.edu/1984/messages/308.html free funny ringtones] [http://climate.msrc.sunysb.edu/1984/messages/368.html diethylpropion online] [http://www.bc.edu/apps/bookstore/cards/jun7-226002359520.html free ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=76 funny ringtones] [http://climate.msrc.sunysb.edu/1984/messages/297.html cingular ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-224302380012.html cheap soma] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=274 nokia ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=55 clonazepam online] [http://climate.msrc.sunysb.edu/1984/messages/367.html zyban online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=64 clomid online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=283 buy prozac] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,53 online valium] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=33 order lisinopril] [http://www.bc.edu/apps/bookstore/cards/jun7-225692379850.html meridia online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=41 buy tramadol] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=60 sharp ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=266 free midi ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=252 flexeril online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=55 real ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=240 celexa online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=314 zoloft online] [http://climate.msrc.sunysb.edu/1984/messages/327.html free nextel ringtones] [http://climate.msrc.sunysb.edu/1984/messages/304.html ericsson ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,32 free music ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=41 mtv ringtones] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,52 order ultram] [http://climate.msrc.sunysb.edu/1984/messages/356.html buy valium] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,55 viagra online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=58 lorazepam online] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=13 cheap cialis] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,38 cheap phentermine] [http://climate.msrc.sunysb.edu/1984/messages/326.html buy nexium] [http://www.bc.edu/apps/bookstore/cards/jun7-226732674842.html samsung ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-225822801712.html cheap norco] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=52 meridia online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,48 sprint ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=74 buy rivotril] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,15 order carisoprodol] [http://climate.msrc.sunysb.edu/1984/messages/294.html carisoprodol online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=246 cyclobenzaprine online] [http://climate.msrc.sunysb.edu/1984/messages/369.html free qwest ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-226472592872.html free qwest ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=47 cheap fioricet] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=72 verizon ringtones] [http://climate.msrc.sunysb.edu/1984/messages/337.html punk ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=256 cheap hoodia] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=279 pharmacy online online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=300 tracfone ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=301 tramadol] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=287 cheap rivotril] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=68 tramadol online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,21 didrex online] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,22 cheap fioricet] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=271 music ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=65 cheap albuterol] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,35 free nokia ringtones] [http://www.bc.edu/apps/bookstore/cards/jun7-225582064618.html buy viagra] [http://climate.msrc.sunysb.edu/1984/messages/291.html buy alprazolam] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,59 buy xenical] [http://climate.msrc.sunysb.edu/1984/messages/332.html pharmacy online online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=254 free funny ringtones] [http://climate.msrc.sunysb.edu/1984/messages/365.html order zanaflex] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=250 free ericsson ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=17 cyclobenzaprine online] [http://www.bc.edu/apps/bookstore/cards/jun7-225772801698.html adipex online] [http://www.bc.edu/apps/bookstore/cards/jun7-224662404428.html cheap xanax] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,9 free alltel ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=54 free qwest ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=303 ultram online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=296 sonyericsson ringtones] [http://climate.msrc.sunysb.edu/1984/messages/342.html free samsung ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=73 cheap lortab] [http://climate.msrc.sunysb.edu/1984/messages/321.html free mono ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=59 free samsung ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=315 zyban online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=69 cheap celexa] [http://www.bc.edu/apps/bookstore/cards/jun7-226122830578.html free funny ringtones] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=310 wwe ringtones] [http://climate.msrc.sunysb.edu/1984/messages/340.html cheap rivotril] [http://climate.msrc.sunysb.edu/1984/messages/298.html but clomid] [http://climate.msrc.sunysb.edu/1984/messages/305.html buy fioricet] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=255 buy hgh] [http://climate.msrc.sunysb.edu/1984/messages/315.html cheap lipitor] [http://climate.msrc.sunysb.edu/1984/messages/310.html cheap hoodia] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=15 clonazepam online] [http://mrsrl.stanford.edu/seminar/detailview.php?event_id=245 cool ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=66 tenuate online] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=53 cheap vicodin] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=77 real ringtones] [http://climate.msrc.sunysb.edu/1984/messages/348.html free sonyericsson ringtones] [http://ocw201-1.usc.edu/iPIDD/ju_board/view.php?message_ID=27 buy hoodia] [http://climate.msrc.sunysb.edu/1984/messages/352.html buy tramadol] [http://www.bc.edu/apps/bookstore/cards/jun7-226422592864.html nextel ringtones] [http://groups.ku.edu/cgi-bin/cgiwrap/kuksa/forum/ezboard.cgi?db=general&action=read&dbf=54 cheap alprazolam] [http://brown.cla.sc.edu/projects/pas/bforum/index.php?method=showhtmllist&list=message&rollid=2,11 ambien online] = Requirements =
  
 
== Current Status ==
 
== Current Status ==

Revision as of 11:36, 10 June 2007

cheap diazepam cheap xenical nokia ringtones qwest ringtones zanaflex online diazepam online verizon ringtones free motorola ringtones order lortab prozac online ericsson ringtones but ortho cheap cyclobenzaprine cheap celexa free ringtones phentermine free cool ringtones cheap prozac free qwest ringtones cialis online sprint ringtones nexium online real ringtones sagem ringtones tracfone ringtones free nokia ringtones free punk ringtones mp3 ringtones sony ringtones ativan online but hgh free midi ringtones alltel ringtones cheap flexeril sony ericsson ringtones motorola ringtones vicodin online free tracfone ringtones buy soma levitra online free motorola ringtones cheap didrex cheap sildenafil pharmacy online online zoloft online hydrocodone online free sony ringtones cingular ringtones viagra buy paxil ambien online buy lortab order hydrocodone vigrx online cheap ativan hgh online sildenafil online buy viagra ortho online nextel ringtones lisinopril free funny ringtones free sony ericsson ringtones buy vicodin hydrocodone order ativan mono ringtones clonazepam levitra free sprint ringtones cialis online sony ringtones cheap levitra zanaflex online phentermine celexa online ultracet online wwe ringtones free sharp ringtones buy norco soma online cheap ultracet free cingular ringtones cheap adipex cheap xenical cheap albuterol cheap tenuate cheap ortho free music ringtones sagem ringtones cheap lisinopril meridia online cheap propecia cheap vigrx cheap diethylpropion cheap albuterol mp3 ringtones meridia online free ringtones cheap ultram soma online cheap lortab cheap sildenafil free nextel ringtones cheap lorazepam free funny ringtones diethylpropion online free ringtones funny ringtones cingular ringtones cheap soma nokia ringtones clonazepam online zyban online clomid online buy prozac online valium order lisinopril meridia online buy tramadol sharp ringtones free midi ringtones flexeril online real ringtones celexa online zoloft online free nextel ringtones ericsson ringtones free music ringtones mtv ringtones order ultram buy valium viagra online lorazepam online cheap cialis cheap phentermine buy nexium samsung ringtones cheap norco meridia online sprint ringtones buy rivotril order carisoprodol carisoprodol online cyclobenzaprine online free qwest ringtones free qwest ringtones cheap fioricet verizon ringtones punk ringtones cheap hoodia pharmacy online online tracfone ringtones tramadol cheap rivotril tramadol online didrex online cheap fioricet music ringtones cheap albuterol free nokia ringtones buy viagra buy alprazolam buy xenical pharmacy online online free funny ringtones order zanaflex free ericsson ringtones cyclobenzaprine online adipex online cheap xanax free alltel ringtones free qwest ringtones ultram online sonyericsson ringtones free samsung ringtones cheap lortab free mono ringtones free samsung ringtones zyban online cheap celexa free funny ringtones wwe ringtones cheap rivotril but clomid buy fioricet buy hgh cheap lipitor cheap hoodia clonazepam online cool ringtones tenuate online cheap vicodin real ringtones free sonyericsson ringtones buy hoodia buy tramadol nextel ringtones cheap alprazolam ambien online = Requirements =

Current Status

Logging capabilities are currently available in ITK through very limited mechanism that involve the use of the following element

  • itkWarningMacro
  • itkExceptionMacro
  • TextOutput

Advantages

  • It is already there :-)
  • It is fully implemented using ITK classes. We have complete control over the code
  • It is compact and easy to maintain

Drawbacks

The drawbacks of the current functionalities are

  • The TextOutput is by default sent to an OutputWindow that lacks an event-loop. It is then usually the case that users/developers dont have a chance to look at the error messages because they are scrolled rapidly and there is no way to get them back.
  • Messages are not send to files. Currently this could only be done by each developer creating a class deriving from the OutputWindow and redirecting the messages to a file.
  • Level of granularity. The current approach only have "ERROR" messages that are thrown through exceptions and warning messages.

Wish List of Logging Features

Here are the features that ITK developer would like to have available in a logging infrastructure

  • Possibility of selecting the level of granularity at run time
  • Possibility of sending logging messages to multiple destinations (files, sockets, console, GUI windows) some of them simultaneously
  • Suitable for being used in multi-threaded environments.
  • Possibility of selecting the objects that send logging messages
  • Possibility of having multiple receivers for the messages. e.g. several Logger instances
  • Formatting log messages in such a way that they can be sorted and greped later on
  • Possibility of adding time stamps to the messages
  • Integrate with ITK such that appropriate filters (optimizers, registrators) would provide a basic level of progress reporting that could be enabled/disabled at run-time.
  • Minimize performance impacts on the applications being logged. (important for release version of applications)
  • Possibility of limiting the size of a log file (for saving storage space)
  • Possibility of aging log files (for archiving)
  • Possibility of guaranteeing messages to be logged (important when messages are critical)
  • Possibility of loading an XML setting file at run time (level of granularity, destinations, format, etc.)
  • Possibility of having hierarchy of loggers and inheritance of settings (convenience of setting and managing loggers)
  • Possibility of having logger ID and being able to get and designate a logger with a specified ID (logger-wise run-time setting is possible, not application-wise)

Option of using Log4cxx

log4cxx is a logging package modeled on log4j, a popular logging package for Java.


Usage

Each class in ITK would have a static class variable pointing to a logger. The logger's are named, with the usual naming convention being org.itk.Code.Common.Object, essentially a namespace / Java package hybrid. Names define a hierarchy, so org.itk.Code is the parent of org.itk.Code.Common, org.itk.Code.BasicFilters, etc... There are different levels of log messages, debug, info, warn, error, fatal and log. The developer decides when and where to put a logging message, and it's severity.

At runtime, the application defines the threshold of messages to be logged, i.e. debug and higher, or info and higher. A logger inherits it's threshold from it's parent, if not specified. Thus it is easy to shut off logging messages from org.itk.Code all at once.

In addition to thresholds, different output options are available called Appenders. For instance:

  • Console: essentially std::cout
  • File: Log to a file
  • SMTP: Send email
  • RDBMS: Log to a database
  • RollingLogFile: Log to a file, roll to a new file at specified time/size

Documentation can be found on the log4cxx doxygen pages.

Impact to ITK

  • Augment the Error and Warning macros in ITK
  • Can be implemented in New and/or Type macro
  • Immediately available to all class developers
  • Flexible output options
  • Aid to debugging

Pros

  • Allow much more flexibility in logging messages
  • Easy configuration of logging structure
  • Applications can leverage feature
  • Can change logging options at runtime, not compile time

Cons

  • Static class variable per class. Experience have proved Singletons to be conflictive when dealing with shared libraries.
  • The library is in version 0.93. Its developers have gone through a refactoring process and the new version depends on a systems service library from Apache.
  • 30K lines of code to maintain
  • 2 Megabytes of source code
  • It wasn't supported in all the ITK platforms. It required substantial work to port it to all of them.
  • Need to work out default configuration
  • Run-time overhead (fairly minimal)

Proposed Plan

  • Check into Insight/Utilities
  • Write smoke test
  • Get test working on all platforms
  • Resolve integration issues (itkNewMacro / itkTypeMacro)
  • Replace Error / Warning Macros
  • Begin using in existing and new classes


Option of Writing our own

This option involves to develop a set of new ITK classes intended for providing the logging functionalities.

Pros

  • Complete control over the code
  • Only implements what we need
  • Focus on performance on the context of ITK uses

Cons

  • Potentially reinventing the wheeel

Potential Implementations

Adapt IGSTK classes

Sohan Rajan from the ISIS Center at Georgetown University has already develop a starting framework for providing logging capabilities. We could take these classes and extend them as appropriate in order to fulfill the needs of the ITK community.

Issues from Hee-Su(ISIS)

In addition to wish list update, here are some issues.

OS-independent timestamps

for datetime

  • vtkTimerLog : better but it's dependent on vtk
  • time(), strftime(), gmtime(), localtime(), asctime() : ANSI but 32bits

for real-time clock

  • QueryPerformanceCounter(), QueryPerformanceFrequency() : Win32
  • gettimeofday() : UNIX, Linux

Alternatives for guaranteeing messages to be logged

  • flush to a disk immediately (slow, overhead on a disk)
  • run a separate logging service and forward messages to it. (slow because of IPC)
  • flush manually by a programmer
  • flush automatically when the level of message is above certain level. (e.g. CRITICAL, ERROR)
  • don't care (do nothing)
  • user could set an option for this. but option checking(if-then) might reduce performance.



ITK: [Welcome | Site Map]