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[](https://travis-ci.org/karupanerura/p5-AnyEvent-ForkManager)
# NAME
AnyEvent::ForkManager - A simple parallel processing fork manager with AnyEvent
# VERSION
This document describes AnyEvent::ForkManager version 0.07.
# SYNOPSIS
use AnyEvent;
use AnyEvent::ForkManager;
use List::Util qw/shuffle/;
my $MAX_WORKERS = 10;
my $pm = AnyEvent::ForkManager->new(max_workers => $MAX_WORKERS);
$pm->on_start(sub {
my($pm, $pid, $sec) = @_;
printf "start sleep %2d sec.\n", $sec;
});
$pm->on_finish(sub {
my($pm, $pid, $status, $sec) = @_;
printf "end sleep %2d sec.\n", $sec;
});
my @sleep_time = shuffle(1 .. 20);
foreach my $sec (@sleep_time) {
$pm->start(
cb => sub {
my($pm, $sec) = @_;
sleep $sec;
},
args => [$sec]
);
}
my $cv = AnyEvent->condvar;
# wait with non-blocking
$pm->wait_all_children(
cb => sub {
my($pm) = @_;
print "end task!\n";
$cv->send;
},
);
$cv->recv;
# DESCRIPTION
`AnyEvent::ForkManager` is much like [Parallel::ForkManager](https://metacpan.org/pod/Parallel::ForkManager),
but supports non-blocking interface with [AnyEvent](https://metacpan.org/pod/AnyEvent).
[Parallel::ForkManager](https://metacpan.org/pod/Parallel::ForkManager) is useful but,
it is difficult to use in conjunction with [AnyEvent](https://metacpan.org/pod/AnyEvent).
Because [Parallel::ForkManager](https://metacpan.org/pod/Parallel::ForkManager)'s some methods are blocking the event loop of the [AnyEvent](https://metacpan.org/pod/AnyEvent).
You can accomplish the same goals without adversely affecting the [Parallel::ForkManager](https://metacpan.org/pod/Parallel::ForkManager) to [AnyEvent::ForkManager](https://metacpan.org/pod/AnyEvent::ForkManager) with [AnyEvent](https://metacpan.org/pod/AnyEvent).
Because [AnyEvent::ForkManager](https://metacpan.org/pod/AnyEvent::ForkManager)'s methods are non-blocking the event loop of the [AnyEvent](https://metacpan.org/pod/AnyEvent).
# INTERFACE
## Methods
### `new`
This is constructor.
- max\_workers
max parallel forking count. (default: 10)
- on\_start
started child process callback.
- on\_finish
finished child process callback.
- on\_error
fork error callback.
- on\_enqueue
If push to start up child process queue, this callback is called.
- on\_dequeue
If shift from start up child process queue, this callback is called.
- on\_working\_max
If request to start up child process and process count equal max process count, this callback is called.
#### Example
my $pm = AnyEvent::ForkManager->new(
max_workers => 2, ## default 10
on_finish => sub { ## optional
my($pid, $status, @anyargs) = @_;
## this callback call when finished child process.(like AnyEvent->child)
},
on_error => sub { ## optional
my($pm, @anyargs) = @_;
## this callback call when fork failed.
},
);
### `start`
start child process.
- args
arguments passed to the callback function of the child process.
- cb
run on child process callback.
#### Example
$pm->start(
cb => sub { ## optional
my($pm, $job_id) = @_;
## this callback call in child process.
},
args => [$job_id],## this arguments passed to the callback function
);
### `wait_all_children`
You can call this method to wait for all the processes which have been forked.
This can wait with blocking or wait with non-blocking in event loop of AnyEvent.
**feature to wait with blocking is ALPHA quality till the version hits v1.0.0. Things might be broken.**
- blocking
If this parameter is true, blocking wait enable. (default: false)
**feature to wait with blocking is ALPHA quality till the version hits v1.0.0. Things might be broken.**
- cb
finished all the processes callback.
#### Example
$pm->wait_all_children(
cb => sub { ## optional
my($pm) = @_;
## this callback call when finished all child process.
},
);
### `signal_all_children`
Sends signal to all worker processes. Only usable from manager process.
### `on_error`
As a new method's argument.
### `on_start`
As a new method's argument.
### `on_finish`
As a new method's argument.
### `on_enqueue`
As a new method's argument.
### `on_dequeue`
As a new method's argument.
### `on_working_max`
As a new method's argument.
# DEPENDENCIES
Perl 5.8.1 or later.
# BUGS
All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
# SEE ALSO
[AnyEvent](https://metacpan.org/pod/AnyEvent)
[AnyEvent::Util](https://metacpan.org/pod/AnyEvent::Util)
[Parallel::ForkManager](https://metacpan.org/pod/Parallel::ForkManager)
[Parallel::Prefork](https://metacpan.org/pod/Parallel::Prefork)
# AUTHOR
Kenta Sato <karupa@cpan.org>
# LICENSE AND COPYRIGHT
Copyright (c) 2012, Kenta Sato. All rights reserved.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
|
