Difference between revisions of "Logging"

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= Logging in GnuCash =
 
= Logging in GnuCash =
  
GnuCash leverages glib logging, with some historical and convenience macros.  As of Winter 2007, GnuCash has an ad-hoc layer on top of glib's "gmessage.h" logging inspired by log4j.  In short, *messages* are logged in a given *log-domain* and at a specific *level*.  The log-domain is a "."-separated path, and a table of log levels is configured.  Between the two, a tree of log-level is established.  Log messages are checked against the tree before being emitted.
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GnuCash leverages glib logging, with some historical and convenience macros.  As of Winter 2007, GnuCash has an ad-hoc layer on top of glib's "gmessage.h" logging inspired by log4j.  In short, '''messages''' are logged in a given '''log-domain''' and at a specific '''level'''.  The log-domain is a "."-separated path, and a table of log levels is configured.  Between the two, a tree of log-level is established.  Log messages are checked against the tree before being emitted.
  
 
= log.conf =
 
= log.conf =
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The special file <tt>~/.gnucash/log.conf</tt> is checked for at gnucash start up; if present, its contents will configure the logging subsystem.  The primary purpose of the configuration file it to setup a specific set of log-levels, though it's also useful for changing the default logging location from <tt>/tmp/gnucash.trace</tt> to stdout, stderr or another file.
 
The special file <tt>~/.gnucash/log.conf</tt> is checked for at gnucash start up; if present, its contents will configure the logging subsystem.  The primary purpose of the configuration file it to setup a specific set of log-levels, though it's also useful for changing the default logging location from <tt>/tmp/gnucash.trace</tt> to stdout, stderr or another file.
  
The specific set of log paths that exist are going to be a function of the code at any given point, but some basic patterns will stabilize.  As of Feb 13 2007, [[User:Jsled]] is using the following to generally raise the log level of the app, but also to get debugging detail about file-backend and UI code changes related to scheduled transactions:
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The specific set of log paths that exist are going to be a function of the code at any given point, but some basic patterns will stabilize.  As of Feb 13 2007, [[User:Jsled]] is using the following to generally raise the log level of the app, but also to get debugging detail about file-backend and U I code changes related to scheduled transactions:
  
 
     [levels]
 
     [levels]

Revision as of 19:41, 27 June 2007

See the Logging API documentation, as well.

Logging in GnuCash

GnuCash leverages glib logging, with some historical and convenience macros. As of Winter 2007, GnuCash has an ad-hoc layer on top of glib's "gmessage.h" logging inspired by log4j. In short, messages are logged in a given log-domain and at a specific level. The log-domain is a "."-separated path, and a table of log levels is configured. Between the two, a tree of log-level is established. Log messages are checked against the tree before being emitted.

log.conf

The special file ~/.gnucash/log.conf is checked for at gnucash start up; if present, its contents will configure the logging subsystem. The primary purpose of the configuration file it to setup a specific set of log-levels, though it's also useful for changing the default logging location from /tmp/gnucash.trace to stdout, stderr or another file.

The specific set of log paths that exist are going to be a function of the code at any given point, but some basic patterns will stabilize. As of Feb 13 2007, User:Jsled is using the following to generally raise the log level of the app, but also to get debugging detail about file-backend and U I code changes related to scheduled transactions:

   [levels]
   gnc=message
   
   gnc.bin=info
   gnc.gui=info
   gnc.backend.file=info
   
   gnc.engine.sx=debug
   gnc.app-util.sx=debug
   gnc.backend.file.sx=debug
   gnc.gui.sx=debug
   gnc.gui.frequency=debug
   
   GLib=error
   
   [output]
   to=stderr


Note that these settings are probably not suitable for your purpose, but serve as an example of what's possible.