Issue with using NDC (nested diagnostic contexts)

[deepak singh-4]

Hi,

  I am using NDC (nested diagnostic contexts) for appending the text from a specific thread.

  Using floowing code:

 

-------------------------

 //In side the run method of that thread

  log4cxx::NDC::push("Thread specific Info");

 

  printing some log4cxx messages.......

 

 //Just before exiting the thread

 log4cxx::NDC::pop();

-------------------------------

 

But the issue is I am not able to get the "Thread specific Info" message in any of the messages I am printing in that thread.

I am using log4cxx 0.10.0 version.

Please let me know if you have any idea.

 

Thanks

Deepak

  

[Assaf Lavie]

What format pattern are you using?

On Mon, Jun 15, 2009 at 3:11 PM, deepak singh <deepak.iitg@...> wrote:

Hi,

  I am using NDC (nested diagnostic contexts) for appending the text from a specific thread.

  Using floowing code:

 

-------------------------

 //In side the run method of that thread

  log4cxx::NDC::push("Thread specific Info");

 

  printing some log4cxx messages.......

 

 //Just before exiting the thread

 log4cxx::NDC::pop();

-------------------------------

 

But the issue is I am not able to get the "Thread specific Info" message in any of the messages I am printing in that thread.

I am using log4cxx 0.10.0 version.

Please let me know if you have any idea.

 

Thanks

Deepak

  

[deepak singh-4]

I am using following format.

 

  //log4cxx initialization
  log4cxx::LogManager::resetConfiguration();
  log4cxx::LayoutPtr layoutPtr(new log4cxx::PatternLayout("%c-%p (%d{dd MMM yyyy HH:mm:ss}) [%-5t] %m%n"));
  log4cxx::AppenderPtr appenderPtr( new log4cxx::ConsoleAppender(layoutPtr, "System.err"));
  log4cxx::BasicConfigurator::configure(appenderPtr);

Thanks

Deepak

On Mon, Jun 15, 2009 at 5:43 PM, Assaf Lavie <assaflavie@...> wrote:

What format pattern are you using?

On Mon, Jun 15, 2009 at 3:11 PM, deepak singh <deepak.iitg@...> wrote:

Hi,

  I am using NDC (nested diagnostic contexts) for appending the text from a specific thread.

  Using floowing code:

 

-------------------------

 //In side the run method of that thread

  log4cxx::NDC::push("Thread specific Info");

 

  printing some log4cxx messages.......

 

 //Just before exiting the thread

 log4cxx::NDC::pop();

-------------------------------

 

But the issue is I am not able to get the "Thread specific Info" message in any of the messages I am printing in that thread.

I am using log4cxx 0.10.0 version.

Please let me know if you have any idea.

 

Thanks

Deepak

  

[Jacob L. Anawalt-2]

On 2009-06-15 06:16, deepak singh wrote:
> On Mon, Jun 15, 2009 at 5:43 PM, Assaf Lavie <assaflavie@...> wrote:
>> On Mon, Jun 15, 2009 at 3:11 PM, deepak singh <deepak.iitg@...>wrote:
>>>   I am using NDC (*nested diagnostic contexts*) for appending the text
>>> from a specific thread.

>>> But the issue is I am not able to get the "Thread specific Info" message
>>> in any of the messages I am printing in that thread.
 >>>
 >> What format pattern are you using?
 >>
 >   log4cxx::LayoutPtr layoutPtr(new log4cxx::PatternLayout("%c-%p (%d{dd MMM
 > yyyy HH:mm:ss}) [%-5t] %m%n"));

Your pattern layout does not include the conversion character to indicate where
you want your NDC stack to be inserted:

x - Used to output the NDC (nested diagnostic context) associated with the
thread that generated the logging event. (From the PatternLayout documentation.)

"%c-%p (%d{dd MMM yyyy HH:mm:ss}) [%-5t] %x %m%n"

That change should fix your output issue and then you can start playing more
with placement (or use at all) of the NDC::push/NDC::pop methods and see where
they work best for you. I prefer to use the constructor to set the value and let
stack scope take care of the pop.

--
Jacob Anawalt
Gecko Software, Inc.
janawalt@...
435-752-8026