Provided by: libminion-perl_7.05-1_all 
NAME
Minion::Backend::Pg - PostgreSQL backend
SYNOPSIS
use Minion::Backend::Pg;
my $backend = Minion::Backend::Pg->new('postgresql://postgres@/test');
DESCRIPTION
Minion::Backend::Pg is a backend for Minion based on Mojo::Pg. All necessary tables will be created
automatically with a set of migrations named "minion". Note that this backend uses many bleeding edge
features, so only the latest, stable version of PostgreSQL is fully supported.
ATTRIBUTES
Minion::Backend::Pg inherits all attributes from Minion::Backend and implements the following new ones.
pg
my $pg = $backend->pg;
$backend = $backend->pg(Mojo::Pg->new);
Mojo::Pg object used to store all data.
METHODS
Minion::Backend::Pg inherits all methods from Minion::Backend and implements the following new ones.
broadcast
my $bool = $backend->broadcast('some_command');
my $bool = $backend->broadcast('some_command', [@args]);
my $bool = $backend->broadcast('some_command', [@args], [$id1, $id2, $id3]);
Broadcast remote control command to one or more workers.
dequeue
my $job_info = $backend->dequeue($worker_id, 0.5);
my $job_info = $backend->dequeue($worker_id, 0.5, {queues => ['important']});
Wait a given amount of time in seconds for a job, dequeue it 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.
queues
queues => ['important']
One or more queues to dequeue jobs from, defaults to "default".
These fields are currently available:
args
args => ['foo', 'bar']
Job arguments.
id
id => '10023'
Job ID.
retries
retries => 3
Number of times job has been retried.
task
task => 'foo'
Task name.
enqueue
my $job_id = $backend->enqueue('foo');
my $job_id = $backend->enqueue(foo => [@args]);
my $job_id = $backend->enqueue(foo => [@args] => {priority => 1});
Enqueue a new job with "inactive" state.
These options are currently available:
attempts
attempts => 25
Number of times performing this job will be attempted, with a delay based on "backoff" in Minion after
the first attempt, defaults to 1.
delay
delay => 10
Delay job for this many seconds (from now), defaults to 0.
notes
notes => {foo => 'bar', baz => [1, 2, 3]}
Hash reference with arbitrary metadata for this job.
parents
parents => [$id1, $id2, $id3]
One or more existing jobs this job depends on, and that need to have transitioned to the state
"finished" before it can be processed.
priority
priority => 5
Job priority, defaults to 0. Jobs with a higher priority get performed first.
queue
queue => 'important'
Queue to put job in, defaults to "default".
fail_job
my $bool = $backend->fail_job($job_id, $retries);
my $bool = $backend->fail_job($job_id, $retries, 'Something went wrong!');
my $bool = $backend->fail_job(
$job_id, $retries, {whatever => 'Something went wrong!'});
Transition from "active" to "failed" state, and if there are attempts remaining, transition back to
"inactive" with a delay based on "backoff" in Minion.
finish_job
my $bool = $backend->finish_job($job_id, $retries);
my $bool = $backend->finish_job($job_id, $retries, 'All went well!');
my $bool = $backend->finish_job(
$job_id, $retries, {whatever => 'All went well!'});
Transition from "active" to "finished" state.
job_info
my $job_info = $backend->job_info($job_id);
Get information about a job, or return "undef" if job does not exist.
# Check job state
my $state = $backend->job_info($job_id)->{state};
# Get job result
my $result = $backend->job_info($job_id)->{result};
These fields are currently available:
args
args => ['foo', 'bar']
Job arguments.
attempts
attempts => 25
Number of times performing this job will be attempted.
children
children => ['10026', '10027', '10028']
Jobs depending on this job.
created
created => 784111777
Epoch time job was created.
delayed
delayed => 784111777
Epoch time job was delayed to.
finished
finished => 784111777
Epoch time job was finished.
notes
notes => {foo => 'bar', baz => [1, 2, 3]}
Hash reference with arbitrary metadata for this job.
parents
parents => ['10023', '10024', '10025']
Jobs this job depends on.
priority
priority => 3
Job priority.
queue
queue => 'important'
Queue name.
result
result => 'All went well!'
Job result.
retried
retried => 784111777
Epoch time job has been retried.
retries
retries => 3
Number of times job has been retried.
started
started => 784111777
Epoch time job was started.
state
state => 'inactive'
Current job state, usually "active", "failed", "finished" or "inactive".
task
task => 'foo'
Task name.
worker
worker => '154'
Id of worker that is processing the job.
list_jobs
my $batch = $backend->list_jobs($offset, $limit);
my $batch = $backend->list_jobs($offset, $limit, {state => 'inactive'});
Returns the same information as "job_info" but in batches.
These options are currently available:
queue
queue => 'important'
List only jobs in this queue.
state
state => 'inactive'
List only jobs in this state.
task
task => 'test'
List only jobs for this task.
list_workers
my $batch = $backend->list_workers($offset, $limit);
Returns the same information as "worker_info" but in batches.
lock
my $bool = $backend->lock('foo', 3600);
my $bool = $backend->lock('foo', 3600, {limit => 20});
Try to acquire a named lock that will expire automatically after the given amount of time in seconds.
These options are currently available:
limit
limit => 20
Number of shared locks with the same name that can be active at the same time, defaults to 1.
new
my $backend = Minion::Backend::Pg->new('postgresql://postgres@/test');
my $backend = Minion::Backend::Pg->new(Mojo::Pg->new);
Construct a new Minion::Backend::Pg object.
note
my $bool = $backend->note($job_id, foo => 'bar');
Change a metadata field for a job.
receive
my $commands = $backend->receive($worker_id);
Receive remote control commands for worker.
register_worker
my $worker_id = $backend->register_worker;
my $worker_id = $backend->register_worker($worker_id);
my $worker_id = $backend->register_worker(
$worker_id, {status => {queues => ['default', 'important']}});
Register worker or send heartbeat to show that this worker is still alive.
These options are currently available:
status
status => {queues => ['default', 'important']}
Hash reference with whatever status information the worker would like to share.
remove_job
my $bool = $backend->remove_job($job_id);
Remove "failed", "finished" or "inactive" job from queue.
repair
$backend->repair;
Repair worker registry and job queue if necessary.
reset
$backend->reset;
Reset job queue.
retry_job
my $bool = $backend->retry_job($job_id, $retries);
my $bool = $backend->retry_job($job_id, $retries, {delay => 10});
Transition job back to "inactive" state, already "inactive" jobs may also be retried to change options.
These options are currently available:
attempts
attempts => 25
Number of times performing this job will be attempted.
delay
delay => 10
Delay job for this many seconds (from now), defaults to 0.
priority
priority => 5
Job priority.
queue
queue => 'important'
Queue to put job in.
stats
my $stats = $backend->stats;
Get statistics for jobs and workers.
These fields are currently available:
active_jobs
active_jobs => 100
Number of jobs in "active" state.
active_workers
active_workers => 100
Number of workers that are currently processing a job.
delayed_jobs
delayed_jobs => 100
Number of jobs in "inactive" state that are scheduled to run at specific time in the future or have
unresolved dependencies. Note that this field is EXPERIMENTAL and might change without warning!
enqueued_jobs
enqueued_jobs => 100000
Rough estimate of how many jobs have ever been enqueued. Note that this field is EXPERIMENTAL and might
change without warning!
failed_jobs
failed_jobs => 100
Number of jobs in "failed" state.
finished_jobs
finished_jobs => 100
Number of jobs in "finished" state.
inactive_jobs
inactive_jobs => 100
Number of jobs in "inactive" state.
inactive_workers
inactive_workers => 100
Number of workers that are currently not processing a job.
unlock
my $bool = $backend->unlock('foo');
Release a named lock.
unregister_worker
$backend->unregister_worker($worker_id);
Unregister worker.
worker_info
my $worker_info = $backend->worker_info($worker_id);
Get information about a worker, or return "undef" if worker does not exist.
# Check worker host
my $host = $backend->worker_info($worker_id)->{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.
SEE ALSO
Minion, Mojolicious::Guides, <http://mojolicious.org>.
perl v5.26.0 2017-08-14 Minion::Backend::Pg(3pm)