1 package MooseX::Daemonize;
2 use strict; # because Kwalitee is pedantic
12 with qw(MooseX::Getopt);
20 ( my $name = lc $_[0]->meta->name ) =~ s/::/_/g;
29 default => sub { return '/' },
38 default => sub { return '/var/run' },
47 die 'Cannot write to ' . $_[0]->pidbase unless -w $_[0]->pidbase;
48 $_[0]->pidbase . '/' . $_[0]->progname . '.pid';
53 metaclass => 'Getopt',
62 if ( my $pid = $self->get_pid ) {
63 my $prog = $self->progname;
64 if ( CORE::kill 0 => $pid ) {
65 croak "$prog already running ($pid).";
67 carp "$prog not running but found pid ($pid)."
68 . "Perhaps the pid file (@{ [$self->pidfile] }) is stale?";
81 return if $self->check;
83 $self->daemonize unless $self->foreground;
85 # Avoid 'stdin reopened for output' warning with newer perls
87 open( NULL, '/dev/null' );
101 my $pidfile = $self->pidfile;
102 lock( $pidfile, undef, 'nonblocking' )
103 or croak "Could not lock PID file $pidfile: $!";
104 write_file( $pidfile, "$$\n" );
111 my $pidfile = $self->pidfile;
112 lock( $pidfile, undef, 'nonblocking' )
113 or croak "Could not lock PID file $pidfile: $!";
121 my $pidfile = $self->pidfile;
122 return unless -e $pidfile;
123 chomp( my $pid = read_file($pidfile) );
128 my ( $self, %args ) = @_;
129 my $pid = $self->get_pid;
130 $self->_kill($pid) unless $self->foreground();
132 return 1 if $args{no_exit};
138 $self->stop( noexit => 1 );
144 $SIG{INT} = sub { $self->handle_sigint; };
145 $SIG{HUP} = sub { $self->handle_sighup };
148 sub handle_sigint { $_[0]->stop; }
149 sub handle_sighup { $_[0]->restart; }
152 confess "_kill isn't public" unless caller eq __PACKAGE__;
153 my ( $self, $pid ) = @_;
155 unless ( CORE::kill 0 => $pid ) {
157 # warn "$pid already appears dead.";
163 # warn "$pid is us! Can't commit suicied.";
167 CORE::kill( 2, $pid ); # Try SIGINT
168 sleep(2) if CORE::kill( 0, $pid );
170 unless ( CORE::kill 0 => $pid or $!{EPERM} ) { # IF it is still running
171 CORE::kill( 15, $pid ); # try SIGTERM
172 sleep(2) if CORE::kill( 0, $pid );
175 unless ( CORE::kill 0 => $pid or $!{EPERM} ) { # IF it is still running
176 CORE::kill( 9, $pid ); # finally try SIGKILL
177 sleep(2) if CORE::kill( 0, $pid );
180 unless ( CORE::kill 0 => $pid or $!{EPERM} ) { # IF it is still running
181 carp "$pid doesn't seem to want to die."; # AHH EVIL DEAD!
192 MooseX::Daemonize - provides a Role that daemonizes your Moose based application.
197 This document describes MooseX::Daemonize version 0.0.1
204 with qw(MooseX::Daemonize);
207 my ( $self, $file ) = @_;
208 open( FILE, ">$file" ) || die;
214 # then in the main package ...
216 my $daemon = FileMaker->new();
218 $daemon->create_file($file);
223 Often you want to write a persistant daemon that has a pid file, and responds appropriately to Signals.
224 This module helps provide the basic infrastructure to do that.
232 The name of our daemon, defaults to $0
236 The base for our bid, defaults to /var/run/$progname
240 The file we store our PID in, defaults to /var/run/$progname/
242 =item foreground Bool
244 If true, the process won't background. Useful for debugging. This option can be set via Getopt's -f.
254 Check to see if an instance is already running.
258 Setup a pidfile, fork, then setup the signal handlers.
262 Stop the process matching the pidfile, and unlinks the pidfile.
273 Calls C<Proc::Daemon::Init> to daemonize this process.
277 Kills the process for $pid. This will try SIGINT, and SIGTERM before falling back to SIGKILL and finally giving up.
279 =item setup_signals()
281 Setup the signal handlers, by default it only sets up handlers for SIGINT and SIGHUP
283 =item handle_sigint()
285 Handle a INT signal, by default calls C<$self->stop()>
287 =item handle_sighup()
289 Handle a HUP signal. By default calls C<$self->restart()>
293 Lookup the pid from our pidfile.
297 Save the current pid in our pidfile
305 The C<meta()> method from L<Class::MOP::Class>
311 =for author to fill in:
312 A list of all the other modules that this module relies upon,
313 including any restrictions on versions, and an indication whether
314 the module is part of the standard Perl distribution, part of the
315 module's distribution, or must be installed separately. ]
317 Obviously L<Moose>, also L<Carp>, L<Proc::Daemon>, L<File::Flock>, L<File::Slurp>
319 =head1 INCOMPATIBILITIES
321 =for author to fill in:
322 A list of any modules that this module cannot be used in conjunction
323 with. This may be due to name conflicts in the interface, or
324 competition for system or program resources, or due to internal
325 limitations of Perl (for example, many modules that use source code
326 filters are mutually incompatible).
331 =head1 BUGS AND LIMITATIONS
333 =for author to fill in:
334 A list of known problems with the module, together with some
335 indication Whether they are likely to be fixed in an upcoming
336 release. Also a list of restrictions on the features the module
337 does provide: data types that cannot be handled, performance issues
338 and the circumstances in which they may arise, practical
339 limitations on the size of data sets, special cases that are not
342 No bugs have been reported.
344 Please report any bugs or feature requests to
345 C<bug-acme-dahut-call@rt.cpan.org>, or through the web interface at
346 L<http://rt.cpan.org>.
350 L<Proc::Daemon>, L<Daemon::Generic>, L<MooseX::Getopt>
354 Chris Prather C<< <perigrin@cpan.org> >>
357 =head1 LICENCE AND COPYRIGHT
359 Copyright (c) 2007, Chris Prather C<< <perigrin@cpan.org> >>. All rights reserved.
361 This module is free software; you can redistribute it and/or
362 modify it under the same terms as Perl itself. See L<perlartistic>.
365 =head1 DISCLAIMER OF WARRANTY
367 BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
368 FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
369 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
370 PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
371 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
372 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
373 ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
374 YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
375 NECESSARY SERVICING, REPAIR, OR CORRECTION.
377 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
378 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
379 REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE
380 LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL,
381 OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
382 THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
383 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
384 FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
385 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF