#NAME

Minion::Worker - Minion worker

#SYNOPSIS

use Minion::Worker;

my $worker = Minion::Worker->new(minion => $minion);

#DESCRIPTION

Minion::Worker performs jobs for Minion.

#WORKER SIGNALS

The Minion::Worker process can be controlled at runtime with the following signals.

#INT, TERM

Stop gracefully after finishing the current jobs.

#QUIT

Stop immediately without finishing the current jobs.

#JOB SIGNALS

The job processes spawned by the Minion::Worker process can be controlled at runtime with the following signals.

#INT, TERM

This signal starts out with the operating system default and allows for jobs to install a custom signal handler to stop gracefully.

#USR1, USR2

These signals start out being ignored and allow for jobs to install custom signal handlers.

#EVENTS

Minion::Worker inherits all events from Mojo::EventEmitter and can emit the following new ones.

#busy

$worker->on(busy => sub ($worker) {
  ...
});

Emitted in the worker process when it is performing the maximum number of jobs in parallel.

$worker->on(busy => sub ($worker) {
  my $max = $worker->status->{jobs};
  say "Performing $max jobs.";
});

#dequeue

$worker->on(dequeue => sub ($worker, $job) {
  ...
});

Emitted in the worker process after a job has been dequeued.

$worker->on(dequeue => sub ($worker, $job) {
  my $id = $job->id;
  say "Job $id has been dequeued.";
});

#wait

$worker->on(wait => sub ($worker) {
  ...
});

Emitted in the worker process before it tries to dequeue a job.

$worker->on(wait => sub ($worker) {
  my $max = $worker->status->{dequeue_timeout};
  say "Waiting up to $max seconds for a new job.";
});

#ATTRIBUTES

Minion::Worker implements the following attributes.

#commands

my $commands = $worker->commands;
$worker      = $worker->commands({jobs => sub {...}});

Registered worker remote control commands.

#id

my $id  = $worker->id;
$worker = $worker->id($id);

Worker id.

#minion

my $minion = $worker->minion;
$worker    = $worker->minion(Minion->new);

Minion object this worker belongs to.

#status

my $status = $worker->status;
$worker    = $worker->status({queues => ['default', 'important']);

Status information to configure workers started with "run" and to share every time "register" is called.

#METHODS

Minion::Worker inherits all methods from Mojo::EventEmitter and implements the following new ones.

#add_command

$worker = $worker->add_command(jobs => sub {...});

Register a worker remote control command.

$worker->add_command(foo => sub ($worker, @args) {
  ...
});

#dequeue

my $job = $worker->dequeue(0.5);
my $job = $worker->dequeue(0.5 => {queues => ['important']});

Wait a given amount of time in seconds for a job, dequeue Minion::Job object and transition from inactive to active state, or return undef if queues were empty.

These options are currently available:

id

id => '10023'

Dequeue a specific job.

min_priority

min_priority => 3

Do not dequeue jobs with a lower priority.

queues

queues => ['important']

One or more queues to dequeue jobs from, defaults to default.

#info

my $info = $worker->info;

Get worker information.

# Check worker host
my $host = $worker->info->{host};

These fields are currently available:

host

host => 'localhost'

Worker host.

jobs

jobs => ['10023', '10024', '10025', '10029']

Ids of jobs the worker is currently processing.

notified

notified => 784111777

Epoch time worker sent the last heartbeat.

pid

pid => 12345

Process id of worker.

started

started => 784111777

Epoch time worker was started.

status

status => {queues => ['default', 'important']}

Hash reference with whatever status information the worker would like to share.

#new

my $worker = Minion::Worker->new;
my $worker = Minion::Worker->new(status => {foo => 'bar'});
my $worker = Minion::Worker->new({status => {foo => 'bar'}});

Construct a new Minion::Worker object and subscribe to "busy" event with default handler that sleeps for one second.

#process_commands

$worker = $worker->process_commands;

Process worker remote control commands.

#register

$worker = $worker->register;

Register worker or send heartbeat to show that this worker is still alive.

#run

$worker->run;

Run worker and wait for "WORKER SIGNALS".

# Start a worker for a special named queue
my $worker = $minion->worker;
$worker->status->{queues} = ['important'];
$worker->run;

These "status" options are currently available:

command_interval

command_interval => 20

Worker remote control command interval, defaults to 10.

dequeue_timeout

dequeue_timeout => 5

Maximum amount time in seconds to wait for a job, defaults to 5.

heartbeat_interval

heartbeat_interval => 60

Heartbeat interval, defaults to 300.

jobs

jobs => 12

Maximum number of jobs to perform parallel in forked worker processes (not including spare processes), defaults to 4.

queues

queues => ['test']

One or more queues to get jobs from, defaults to default.

repair_interval

repair_interval => 3600

Repair interval, up to half of this value can be subtracted randomly to make sure not all workers repair at the same time, defaults to 21600 (6 hours).

spare

spare => 2

Number of spare worker processes to reserve for high priority jobs, defaults to 1.

spare_min_priority

spare_min_priority => 7

Minimum priority of jobs to use spare worker processes for, defaults to 1.

These remote control "commands" are currently available:

jobs

$minion->broadcast('jobs', [10]);
$minion->broadcast('jobs', [10], [$worker_id]);

Instruct one or more workers to change the number of jobs to perform concurrently. Setting this value to 0 will effectively pause the worker. That means all current jobs will be finished, but no new ones accepted, until the number is increased again.

kill

$minion->broadcast('kill', ['INT', 10025]);
$minion->broadcast('kill', ['INT', 10025], [$worker_id]);

Instruct one or more workers to send a signal to a job that is currently being performed. This command will be ignored by workers that do not have a job matching the id. That means it is safe to broadcast this command to all workers.

stop

$minion->broadcast('stop', [10025]);
$minion->broadcast('stop', [10025], [$worker_id]);

Instruct one or more workers to stop a job that is currently being performed immediately. This command will be ignored by workers that do not have a job matching the id. That means it is safe to broadcast this command to all workers.

#unregister

$worker = $worker->unregister;

Unregister worker.

#SEE ALSO

Minion, Minion::Guide, https://minion.pm, Mojolicious::Guides, https://mojolicious.org.