App::Info::Handler::Print(3pm) User Contributed Perl Documentation App::Info::Handler::Print(3pm)
NAME
App::Info::Handler::Print - Print App::Info event messages
SYNOPSIS
use App::Info::Category::FooApp;
use App::Info::Handler::Print;
my $stdout = App::Info::Handler::Print->new( fh => 'stdout' );
my $app = App::Info::Category::FooApp->new( on_info => $stdout );
# Or...
my $app = App::Info::Category::FooApp->new( on_error => 'stderr' );
DESCRIPTION
App::Info::Handler::Print objects handle App::Info events by printing their messages to a filehandle. This means that if you want event
messages to print to a file or to a system filehandle, you can easily do it with this class. You'll find, however, that
App::Info::Handler::Print is most effective for info and error events; unknown and prompt events are better handled by event handlers that
know how to prompt users for data. See App::Info::Handler::Prompt for an example of that functionality.
Upon loading, App::Info::Handler::Print registers itself with App::Info::Handler, setting up a couple of strings that can be passed to an
App::Info concrete subclass constructor. These strings are shortcuts that tell App::Info how to create the proper App::Info::Handler::Print
object for handling events. The registered strings are:
stdout
Prints event messages to "STDOUT".
stderr
Prints event messages to "STDERR".
See the "new()" constructor below for how to have App::Info::Handler::Print print event messages to different filehandle.
INTERFACE
Constructor
new
my $stderr_handler = App::Info::Handler::Print->new;
$stderr_handler = App::Info::Handler::Print->new( fh => 'stderr' );
my $stdout_handler = App::Info::Handler::Print->new( fh => 'stdout' );
my $fh = FileHandle->new($file);
my $fh_handler = App::Info::Handler::Print->new( fh => $fh );
Constructs a new App::Info::Handler::Print and returns it. It can take a single parameterized argument, "fh", which can be any one of the
following values:
stderr
Constructs a App::Info::Handler::Print object that prints App::Info event messages to "STDERR".
stdout
Constructs a App::Info::Handler::Print object that prints App::Info event messages to "STDOUT".
FileHandle
GLOB
Pass in a reference and App::Info::Handler::Print will assume that it's a filehandle reference that it can print to. Note that passing
in something that can't be printed to will trigger an exception when App::Info::Handler::Print tries to print to it.
If the "fh" parameter is not passed, "new()" will default to creating an App::Info::Handler::Print object that prints App::Info event
messages to "STDOUT".
handler
This method is called by App::Info to print out the message from events.
BUGS
Please send bug reports to <bug-app-info@rt.cpan.org> or file them at <http://rt.cpan.org/NoAuth/Bugs.html?Dist=App-Info>.
AUTHOR
David Wheeler <david@justatheory.com>
SEE ALSO
App::Info documents the event handling interface.
App::Info::Handler::Carp handles events by passing their messages Carp module functions.
App::Info::Handler::Prompt offers event handling more appropriate for unknown and confirm events.
App::Info::Handler describes how to implement custom App::Info event handlers.
COPYRIGHT AND LICENSE
Copyright (c) 2002-2008, David Wheeler. Some Rights Reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2011-03-15 App::Info::Handler::Print(3pm)