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odoo-addon-queue-job
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This addon adds an integrated Job Queue to Odoo.
It allows to postpone method calls executed asynchronously.
Jobs are executed in the background by a Jobrunner
, in their own
transaction.
Example:
.. code:: python
from odoo import models, fields, api
class MyModel(models.Model): _name = 'my.model'
def my_method(self, a, k=None):
_logger.info('executed with a: %s and k: %s', a, k)
class MyOtherModel(models.Model): _name = 'my.other.model'
def button_do_stuff(self):
self.env['my.model'].with_delay().my_method('a', k=2)
In the snippet of code above, when we call button_do_stuff
, a job
capturing the method and arguments will be postponed. It will be
executed as soon as the Jobrunner has a free bucket, which can be
instantaneous if no other job is running.
Features:
Table of contents
.. contents:: :local:
Be sure to have the requests
library.
Using environment variables and command line:
Adjust environment variables (optional):
ODOO_QUEUE_JOB_CHANNELS=root:4
or any other channels
configuration. The default is root:1
xmlrpc_port
is not set: ODOO_QUEUE_JOB_PORT=8069
Start Odoo with --load=web,queue_job
and --workers
greater
than 1. [1]_
Using the Odoo configuration file:
.. code:: ini
[options] (...) workers = 6 server_wide_modules = web,queue_job
(...) [queue_job] channels = root:2
::
...INFO...queue_job.jobrunner.runner: starting ...INFO...queue_job.jobrunner.runner: initializing database connections ...INFO...queue_job.jobrunner.runner: queue job runner ready for db ...INFO...queue_job.jobrunner.runner: database connections ready
base_import_async
) and observe they start
immediately and in parallel.--log-handler=odoo.addons.queue_job:DEBUG
.. [1] It works with the threaded Odoo server too, although this way of running Odoo is obviously not for production purposes.
To use this module, you need to:
Job Queue
menuDelaying jobs
The fast way to enqueue a job for a method is to use ``with_delay()`` on
a record or model:
.. code:: python
def button_done(self):
self.with_delay().print_confirmation_document(self.state)
self.write({"state": "done"})
return True
Here, the method ``print_confirmation_document()`` will be executed
asynchronously as a job. ``with_delay()`` can take several parameters to
define more precisely how the job is executed (priority, ...).
All the arguments passed to the method being delayed are stored in the
job and passed to the method when it is executed asynchronously,
including ``self``, so the current record is maintained during the job
execution (warning: the context is not kept).
Dependencies can be expressed between jobs. To start a graph of jobs,
use ``delayable()`` on a record or model. The following is the
equivalent of ``with_delay()`` but using the long form:
.. code:: python
def button_done(self):
delayable = self.delayable()
delayable.print_confirmation_document(self.state)
delayable.delay()
self.write({"state": "done"})
return True
Methods of Delayable objects return itself, so it can be used as a
builder pattern, which in some cases allow to build the jobs
dynamically:
.. code:: python
def button_generate_simple_with_delayable(self):
self.ensure_one()
# Introduction of a delayable object, using a builder pattern
# allowing to chain jobs or set properties. The delay() method
# on the delayable object actually stores the delayable objects
# in the queue_job table
(
self.delayable()
.generate_thumbnail((50, 50))
.set(priority=30)
.set(description=_("generate xxx"))
.delay()
)
The simplest way to define a dependency is to use ``.on_done(job)`` on a
Delayable:
.. code:: python
def button_chain_done(self):
self.ensure_one()
job1 = self.browse(1).delayable().generate_thumbnail((50, 50))
job2 = self.browse(1).delayable().generate_thumbnail((50, 50))
job3 = self.browse(1).delayable().generate_thumbnail((50, 50))
# job 3 is executed when job 2 is done which is executed when job 1 is done
job1.on_done(job2.on_done(job3)).delay()
Delayables can be chained to form more complex graphs using the
``chain()`` and ``group()`` primitives. A chain represents a sequence of
jobs to execute in order, a group represents jobs which can be executed
in parallel. Using ``chain()`` has the same effect as using several
nested ``on_done()`` but is more readable. Both can be combined to form
a graph, for instance we can group [A] of jobs, which blocks another
group [B] of jobs. When and only when all the jobs of the group [A] are
executed, the jobs of the group [B] are executed. The code would look
like:
.. code:: python
from odoo.addons.queue_job.delay import group, chain
def button_done(self):
group_a = group(self.delayable().method_foo(), self.delayable().method_bar())
group_b = group(self.delayable().method_baz(1), self.delayable().method_baz(2))
chain(group_a, group_b).delay()
self.write({"state": "done"})
return True
When a failure happens in a graph of jobs, the execution of the jobs
that depend on the failed job stops. They remain in a state
``wait_dependencies`` until their "parent" job is successful. This can
happen in two ways: either the parent job retries and is successful on a
second try, either the parent job is manually "set to done" by a user.
In these two cases, the dependency is resolved and the graph will
continue to be processed. Alternatively, the failed job and all its
dependent jobs can be canceled by a user. The other jobs of the graph
that do not depend on the failed job continue their execution in any
case.
Note: ``delay()`` must be called on the delayable, chain, or group which
is at the top of the graph. In the example above, if it was called on
``group_a``, then ``group_b`` would never be delayed (but a warning
would be shown).
It is also possible to split a job into several jobs, each one
processing a part of the work. This can be useful to avoid very long
jobs, parallelize some task and get more specific errors. Usage is as
follows:
.. code:: python
def button_split_delayable(self):
(
self # Can be a big recordset, let's say 1000 records
.delayable()
.generate_thumbnail((50, 50))
.set(priority=30)
.set(description=_("generate xxx"))
.split(50) # Split the job in 20 jobs of 50 records each
.delay()
)
The ``split()`` method takes a ``chain`` boolean keyword argument. If
set to True, the jobs will be chained, meaning that the next job will
only start when the previous one is done:
.. code:: python
def button_increment_var(self):
(
self
.delayable()
.increment_counter()
.split(1, chain=True) # Will exceute the jobs one after the other
.delay()
)
Enqueing Job Options
Configure default options for jobs
In earlier versions, jobs could be configured using the ``@job``
decorator. This is now obsolete, they can be configured using optional
``queue.job.function`` and ``queue.job.channel`` XML records.
Example of channel:
.. code:: XML
<record id="channel_sale" model="queue.job.channel">
<field name="name">sale</field>
<field name="parent_id" ref="queue_job.channel_root" />
</record>
Example of job function:
.. code:: XML
<record id="job_function_sale_order_action_done" model="queue.job.function">
<field name="model_id" ref="sale.model_sale_order" />
<field name="method">action_done</field>
<field name="channel_id" ref="channel_sale" />
<field name="related_action" eval='{"func_name": "custom_related_action"}' />
<field name="retry_pattern" eval="{1: 60, 2: 180, 3: 10, 5: 300}" />
</record>
The general form for the ``name`` is: ``<model.name>.method``.
The channel, related action and retry pattern options are optional, they
are documented below.
When writing modules, if 2+ modules add a job function or channel with
the same name (and parent for channels), they'll be merged in the same
record, even if they have different xmlids. On uninstall, the merged
record is deleted when all the modules using it are uninstalled.
**Job function: model**
If the function is defined in an abstract model, you can not write
``<field name="model_id" ref="xml_id_of_the_abstract_model"</field>``
but you have to define a function for each model that inherits from the
abstract model.
**Job function: channel**
The channel where the job will be delayed. The default channel is
``root``.
**Job function: related action**
The *Related Action* appears as a button on the Job's view. The button
will execute the defined action.
The default one is to open the view of the record related to the job
(form view when there is a single record, list view for several
records). In many cases, the default related action is enough and
doesn't need customization, but it can be customized by providing a
dictionary on the job function:
.. code:: python
{
"enable": False,
"func_name": "related_action_partner",
"kwargs": {"name": "Partner"},
}
- ``enable``: when ``False``, the button has no effect (default:
``True``)
- ``func_name``: name of the method on ``queue.job`` that returns an
action
- ``kwargs``: extra arguments to pass to the related action method
Example of related action code:
.. code:: python
class QueueJob(models.Model):
_inherit = 'queue.job'
def related_action_partner(self, name):
self.ensure_one()
model = self.model_name
partner = self.records
action = {
'name': name,
'type': 'ir.actions.act_window',
'res_model': model,
'view_type': 'form',
'view_mode': 'form',
'res_id': partner.id,
}
return action
**Job function: retry pattern**
When a job fails with a retryable error type, it is automatically
retried later. By default, the retry is always 10 minutes later.
A retry pattern can be configured on the job function. What a pattern
represents is "from X tries, postpone to Y seconds". It is expressed as
a dictionary where keys are tries and values are seconds to postpone as
integers:
.. code:: python
{
1: 10,
5: 20,
10: 30,
15: 300,
}
Based on this configuration, we can tell that:
- 5 first retries are postponed 10 seconds later
- retries 5 to 10 postponed 20 seconds later
- retries 10 to 15 postponed 30 seconds later
- all subsequent retries postponed 5 minutes later
**Job Context**
The context of the recordset of the job, or any recordset passed in
arguments of a job, is transferred to the job according to an
allow-list.
The default allow-list is ("tz", "lang", "allowed_company_ids",
"force_company", "active_test"). It can be customized in
``Base._job_prepare_context_before_enqueue_keys``. **Bypass jobs on
running Odoo**
When you are developing (ie: connector modules) you might want to bypass
the queue job and run your code immediately.
To do so you can set QUEUE_JOB\__NO_DELAY=1 in your environment.
**Bypass jobs in tests**
When writing tests on job-related methods is always tricky to deal with
delayed recordsets. To make your testing life easier you can set
queue_job\__no_delay=True in the context.
Tip: you can do this at test case level like this
.. code:: python
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.env = cls.env(context=dict(
cls.env.context,
queue_job__no_delay=True, # no jobs thanks
))
Then all your tests execute the job methods synchronously without
delaying any jobs.
Testing
~~~~~~~
**Asserting enqueued jobs**
The recommended way to test jobs, rather than running them directly and
synchronously is to split the tests in two parts:
- one test where the job is mocked (trap jobs with ``trap_jobs()``
and the test only verifies that the job has been delayed with the
expected arguments
- one test that only calls the method of the job synchronously, to
validate the proper behavior of this method only
Proceeding this way means that you can prove that jobs will be enqueued
properly at runtime, and it ensures your code does not have a different
behavior in tests and in production (because running your jobs
synchronously may have a different behavior as they are in the same
transaction / in the middle of the method). Additionally, it gives more
control on the arguments you want to pass when calling the job's method
(synchronously, this time, in the second type of tests), and it makes
tests smaller.
The best way to run such assertions on the enqueued jobs is to use
``odoo.addons.queue_job.tests.common.trap_jobs()``.
A very small example (more details in ``tests/common.py``):
.. code:: python
# code
def my_job_method(self, name, count):
self.write({"name": " ".join([name] * count)
def method_to_test(self):
count = self.env["other.model"].search_count([])
self.with_delay(priority=15).my_job_method("Hi!", count=count)
return count
# tests
from odoo.addons.queue_job.tests.common import trap_jobs
# first test only check the expected behavior of the method and the proper
# enqueuing of jobs
def test_method_to_test(self):
with trap_jobs() as trap:
result = self.env["model"].method_to_test()
expected_count = 12
trap.assert_jobs_count(1, only=self.env["model"].my_job_method)
trap.assert_enqueued_job(
self.env["model"].my_job_method,
args=("Hi!",),
kwargs=dict(count=expected_count),
properties=dict(priority=15)
)
self.assertEqual(result, expected_count)
# second test to validate the behavior of the job unitarily
def test_my_job_method(self):
record = self.env["model"].browse(1)
record.my_job_method("Hi!", count=12)
self.assertEqual(record.name, "Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi!")
If you prefer, you can still test the whole thing in a single test, by
calling ``jobs_tester.perform_enqueued_jobs()`` in your test.
.. code:: python
def test_method_to_test(self):
with trap_jobs() as trap:
result = self.env["model"].method_to_test()
expected_count = 12
trap.assert_jobs_count(1, only=self.env["model"].my_job_method)
trap.assert_enqueued_job(
self.env["model"].my_job_method,
args=("Hi!",),
kwargs=dict(count=expected_count),
properties=dict(priority=15)
)
self.assertEqual(result, expected_count)
trap.perform_enqueued_jobs()
record = self.env["model"].browse(1)
record.my_job_method("Hi!", count=12)
self.assertEqual(record.name, "Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi! Hi!")
**Execute jobs synchronously when running Odoo**
When you are developing (ie: connector modules) you might want to bypass
the queue job and run your code immediately.
To do so you can set ``QUEUE_JOB__NO_DELAY=1`` in your environment.
Warning
Do not do this in production
**Execute jobs synchronously in tests**
You should use ``trap_jobs``, really, but if for any reason you could
not use it, and still need to have job methods executed synchronously in
your tests, you can do so by setting ``queue_job__no_delay=True`` in the
context.
Tip: you can do this at test case level like this
.. code:: python
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.env = cls.env(context=dict(
cls.env.context,
queue_job__no_delay=True, # no jobs thanks
))
Then all your tests execute the job methods synchronously without
delaying any jobs.
In tests you'll have to mute the logger like:
@mute_logger('odoo.addons.queue_job.models.base')
Note
in graphs of jobs, the ``queue_job__no_delay`` context key must be in at
least one job's env of the graph for the whole graph to be executed
synchronously
Tips and tricks
~~~~~~~~~~~~~~~
- **Idempotency**
(https://www.restapitutorial.com/lessons/idempotency.html): The
queue_job should be idempotent so they can be retried several times
without impact on the data.
- **The job should test at the very beginning its relevance**: the
moment the job will be executed is unknown by design. So the first
task of a job should be to check if the related work is still relevant
at the moment of the execution.
Patterns
~~~~~~~~
Through the time, two main patterns emerged:
1. For data exposed to users, a model should store the data and the
model should be the creator of the job. The job is kept hidden from
the users
2. For technical data, that are not exposed to the users, it is
generally alright to create directly jobs with data passed as
arguments to the job, without intermediary models.
Known issues / Roadmap
======================
- After creating a new database or installing ``queue_job`` on an
existing database, Odoo must be restarted for the runner to detect it.
- When Odoo shuts down normally, it waits for running jobs to finish.
However, when the Odoo server crashes or is otherwise force-stopped,
running jobs are interrupted while the runner has no chance to know
they have been aborted. In such situations, jobs may remain in
``started`` or ``enqueued`` state after the Odoo server is halted.
Since the runner has no way to know if they are actually running or
not, and does not know for sure if it is safe to restart the jobs, it
does not attempt to restart them automatically. Such stale jobs
therefore fill the running queue and prevent other jobs to start. You
must therefore requeue them manually, either from the Jobs view, or by
running the following SQL statement *before starting Odoo*:
.. code:: sql
update queue_job set state='pending' where state in ('started', 'enqueued')
Changelog
=========
Next
----
- [ADD] Run jobrunner as a worker process instead of a thread in the
main process (when running with --workers > 0)
- [REF] ``@job`` and ``@related_action`` deprecated, any method can be
delayed, and configured using ``queue.job.function`` records
- [MIGRATION] from 13.0 branched at rev. e24ff4b
Bug Tracker
===========
Bugs are tracked on `GitHub Issues <https://github.com/OCA/queue/issues>`_.
In case of trouble, please check there if your issue has already been reported.
If you spotted it first, help us to smash it by providing a detailed and welcomed
`feedback <https://github.com/OCA/queue/issues/new?body=module:%20queue_job%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
Do not contact contributors directly about support or help with technical issues.
Credits
=======
Authors
-------
* Camptocamp
* ACSONE SA/NV
Contributors
------------
- Guewen Baconnier <guewen.baconnier@camptocamp.com>
- Stéphane Bidoul <stephane.bidoul@acsone.eu>
- Matthieu Dietrich <matthieu.dietrich@camptocamp.com>
- Jos De Graeve <Jos.DeGraeve@apertoso.be>
- David Lefever <dl@taktik.be>
- Laurent Mignon <laurent.mignon@acsone.eu>
- Laetitia Gangloff <laetitia.gangloff@acsone.eu>
- Cédric Pigeon <cedric.pigeon@acsone.eu>
- Tatiana Deribina <tatiana.deribina@avoin.systems>
- Souheil Bejaoui <souheil.bejaoui@acsone.eu>
- Eric Antones <eantones@nuobit.com>
- Simone Orsi <simone.orsi@camptocamp.com>
- Nguyen Minh Chien <chien@trobz.com>
- Tran Quoc Duong <duongtq@trobz.com>
- Vo Hong Thien <thienvh@trobz.com>
Other credits
-------------
The migration of this module from 17.0 to 18.0 was financially supported
by Camptocamp.
Maintainers
-----------
This module is maintained by the OCA.
.. image:: https://odoo-community.org/logo.png
:alt: Odoo Community Association
:target: https://odoo-community.org
OCA, or the Odoo Community Association, is a nonprofit organization whose
mission is to support the collaborative development of Odoo features and
promote its widespread use.
.. |maintainer-guewen| image:: https://github.com/guewen.png?size=40px
:target: https://github.com/guewen
:alt: guewen
Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
|maintainer-guewen|
This module is part of the `OCA/queue <https://github.com/OCA/queue/tree/18.0/queue_job>`_ project on GitHub.
You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.
FAQs
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