NAME

Net::SIP::Debug - debugging of Net::SIP

SYNOPSIS

  use Net::SIP::Debug 1;
  use Net::SIP::Debug qw( Net::SIP*=0 Registrar=1 );
  Net::SIP::Debug->level(1);

  perl -MNet::SIP::Debug=1 app.pl

DESCRIPTION

Provides debugging support for Net::SIP. Debugging can be enabled/disabled globally or per package and optional per subpackage.

CLASS METHODS

import ( @ARGS )

Extracts everything from arguments given to use which might be usable by level and forwards rest to Exporter.

level ( @ARGS )

Enables/disables debugging depending on @ARGS. @ARGS might contain the following specifications:

NUMBER

NUMBER will be interpreted as the debugging level. Right now only one level is implemented, so everything !=0 will enable debugging.

PACKAGE

Enables debugging for package PACKAGE. PACKAGE might be a fully qualified package (e.g. Net::SIP::Registrar) or the Net or Net::SIP might be ommited (Registrar). If a * is added the debugging will also be enabled for subpackages, e.g. Endpoint* will enable debugging for Net::SIP::Endpoint and Net::SIP::Endpoint::Context too.

PACKAGE=NUMBER

Similar to the previous item, but this sets debugging level to NUMBER for the specified packages and thus can also be used to selectivly disable debugging for some packages.

If @ARGS is empty it will return the debugging level for the package which called this method (the first package in the caller stack which is not Net::SIP::Debug itself).

set_prefix ( PREFIX )

Sets prefix used for debug messages to PREFIX. Default prefix is 'DEBUG:' but for instance for forking applications it might be useful to change this to "DEBUG($$):" or similar.

SUBROUTINES

DEBUG|debug ( MESSAGE | FMT,@ARG )

If debugging is enabled it will print to STDERR debugging info. If multiple arguments are given to the function they will be fed into sprintf to create a single message.

The MESSAGE (or the result from sprintf(FMT,@ARG)) will be prefixed by the callers package, the callers function and the line from which DEBUG was called. In front of the prefix the current time (as float time_t) and the string "DEBUG:" will be added.

If the message consists of multiple lines each line will be prefixed by the prefix and all but the first line will also have a TAB added between prefix and message data.

The function is by default exported as DEBUG and can by exported as debug too.

DEBUG_DUMP ( @DATA )

Will call debug with the output from Data::Dumpers Dumper if debugging is enabled. If @DATA has more than one item it will be fed as reference into Dumper, otherwise only the single item will be fed to Dumper.

This function is exported by default.

stacktrace ( MESSAGE | FMT,@ARG )

Uses the arguments in debug, but instead of writing a debug message to STDERR it will be used in Carp::longmess. Returns string with stacktrace.

LEAK_TRACK ( REF )

This is used internally for tracking leaks. It will rebless REF into a new class which behaves like the old one. Calls of LEAK_TRACK and DESTROY on this class will be tracked and shown. If Devel::Peek can be loaded it will Dump information about the REF on each call to LEAK_TRACK.

Exported by default.