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Acme::JavaTrace - Module for using Java-like stack traces


Version 0.03


    use Acme::JavaTrace;
    warn "some kind of non-fatal exception occured";
    die "some kind of fatal exception occured";


<buzzword>This module tries to improves the Perl programmer experience by porting the Java paradigm to print stack traces, which is more professional than Perl's way. </buzzword>

This is achieved by modifying the functions warn() and die() in order to replace the standard messages by complete stack traces that precisely indicates how and where the error or warning occurred. Other than this, their use should stay unchanged, even when using die() inside eval().

For a explanation of why I wrote this module, you can read the sildes of my lightning talk Entreprise Perl, available here:


Here is an example of stack trace produced by Acme::JavaTrace using a fictional Perl program:

    Exception: event not implemented
            at MyEvents::generic_event_handler(workshop/
            at MyEvents::__ANON__(workshop/
            at MyEvents::dispatch_event(workshop/
            at MyEvents::call_event(workshop/
            at main::(workshop/

Please note that even the professionnal indentation present in Java traces is included in the trace.



These functions respectively handle the __WARN__ and __DIE__ signals. Therefore there is no need to call these directly (and in fact, they are not expected to be called directly).


This function is the one which prints the stack trace, following the Java standard format.


Java, for its unhelpful kilometre-long stack traces.


Sébastien Aperghis-Tramoni <>


Please report any bugs or feature requests to, or through the web interface at I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


Acme::JavaTrace is Copyright (C)2004 Sébastien Aperghis-Tramoni.

This program is free software. You can redistribute it and/or modify it under the same terms as Perl itself.