NAME

Minion::Backend::MongoDB - MongoDB backend for Minion

VERSION

version 1.03

SYNOPSIS

  use Minion::Backend::MongoDB;

  my $backend = Minion::Backend::MongoDB->new('mongodb://127.0.0.1:27017');

DESCRIPTION

Minion::Backend::MongoDB is a MongoDB backend for Minion derived from Minion::Backend::Pg and supports its methods and tests up to 9.13 (2019-08-29).

ATTRIBUTES

Minion::Backend::MongoDB inherits all attributes from Minion::Backend and implements the following new ones.

mongodb

  my $mongodb = $backend->mongodb;
  $backend  = $backend->mongodb(MongoDB->new);

MongoDB::Database object used to store collections.

jobs

  my $jobs = $backend->jobs;
  $backend = $backend->jobs(MongoDB::Collection->new);

MongoDB::Collection object for jobs collection, defaults to one based on "prefix".

notifications

  my $notifications = $backend->notifications;
  $backend          = $backend->notifications(MongoDB::Collection->new);

MongoDB::Collection object for notifications collection, defaults to one based on "prefix".

prefix

  my $prefix = $backend->prefix;
  $backend   = $backend->prefix('foo');

Prefix for collections, defaults to minion.

workers

  my $workers = $backend->workers;
  $backend    = $backend->workers(MongoDB::Collection->new);

MongoDB::Collection object for workers collection, defaults to one based on "prefix".

METHODS

Minion::Backend::MongoDB 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 $info = $backend->dequeue($worker_id, 0.5);

Wait for job, dequeue it and transition from inactive to active state or return undef if queue was empty.

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:

delay
  delay => 10

Delay job for this many seconds from now.

priority
  priority => 5

Job priority, defaults to 0.

fail_job

  my $bool = $backend->fail_job($job_id);
  my $bool = $backend->fail_job($job_id, 'Something went wrong!');

Transition from active to failed state.

finish_job

  my $bool = $backend->finish_job($job_id);

Transition from active to finished state.

job_info

  my $info = $backend->job_info($job_id);

Get information about a job or return undef if job does not exist.

list_jobs

  my $batch = $backend->list_jobs($skip, $limit);
  my $batch = $backend->list_jobs($skip, $limit, {state => 'inactive'});

Returns the same information as "job_info" but in batches.

These options are currently available:

ids
  ids => ['23', '24']

List only jobs with these ids.

notes
  notes => ['foo', 'bar']

List only jobs with one of these notes. Note that this option is EXPERIMENTAL and might change without warning!

queues
  queues => ['important', 'unimportant']

List only jobs in these queues.

state
  state => 'inactive'

List only jobs in this state.

task
  task => 'test'

List only jobs for this task.

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.

id
  id => 10025

Job id.

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.

time
  time => 78411177

Server time.

worker
  worker => '154'

Id of worker that is processing the job.

list_locks

  my $results = $backend->list_locks($offset, $limit);
  my $results = $backend->list_locks($offset, $limit, {names => ['foo']});

Returns information about locks in batches.

  # Get the total number of results (without limit)
  my $num = $backend->list_locks(0, 100, {names => ['bar']})->{total};

  # Check expiration time
  my $results = $backend->list_locks(0, 1, {names => ['foo']});
  my $expires = $results->{locks}[0]{expires};

These options are currently available:

names
  names => ['foo', 'bar']

List only locks with these names.

These fields are currently available:

expires
  expires => 784111777

Epoch time this lock will expire.

name
  name => 'foo'

Lock name.

list_workers

  my $results = $backend->list_workers($offset, $limit);
  my $results = $backend->list_workers($offset, $limit, {ids => [23]});

Returns information about workers in batches.

  # Get the total number of results (without limit)
  my $num = $backend->list_workers(0, 100)->{total};

  # Check worker host
  my $results = $backend->list_workers(0, 1, {ids => [$worker_id]});
  my $host    = $results->{workers}[0]{host};

These options are currently available:

ids
  ids => ['23', '24']

List only workers with these ids.

These fields are currently available:

id
  id => 22

Worker id.

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.

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. An expiration time of 0 can be used to check if a named lock already exists without creating one.

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::MongoDB->new('mongodb://127.0.0.1:27017');

Construct a new Minion::Backend::MongoDB object. Required a connection string URI. Optional every other attributes will be pass to MongoDB::MongoClient costructor.

note

  my $bool = $backend->note($job_id, {mojo => 'rocks', minion => 'too'});

Change one or more metadata fields for a job. Setting a value to undef will remove the field.

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);

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

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);
  my $bool = $backend->retry_job($job_id, {delay => 10});

Transition from failed or finished state back to inactive.

These options are currently available:

delay
  delay => 10

Delay job for this many seconds (from now).

stats

  my $stats = $backend->stats;

Get statistics for jobs and workers.

unregister_worker

  $backend->unregister_worker($worker_id);

Unregister worker.

worker_info

  my $info = $backend->worker_info($worker_id);

Get information about a worker or return undef if worker does not exist.

_oid

  my $mongo_oid = $backend->_oid($hex_24length);

EXPERIMENTAL: Convert an 24-byte hexadecimal value into a BSON::OID object. Usually, it should be used only if you need to query the MongoDB directly

NOTES ABOUT USER

User must have this roles

  "roles" : [
                {
                        "role" : "dbAdmin",
                        "db" : "minion"
                },
                {
                        "role" : "clusterMonitor",
                        "db" : "admin"
                },
                {
                        "role" : "readWrite",
                        "db" : "minion"
                }
        ]

SEE ALSO

Minion, MongoDB, http://mojolicio.us.

AUTHOR

Emiliano Bruni <info@ebruni.it>, Andrey Khozov <avkhozov@gmail.com>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2019 by Emiliano Bruni, Andrey Khozov.

This is free software, licensed under:

  The GNU General Public License, Version 3, June 2007