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<div class="document" id="job-queue">
<h1 class="title">Job Queue</h1>
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!! This file is generated by oca-gen-addon-readme !!
!! changes will be overwritten. !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
<p><a class="reference external" href="https://odoo-community.org/page/development-status"><img alt="Mature" src="https://img.shields.io/badge/maturity-Mature-brightgreen.png" /></a> <a class="reference external" href="http://www.gnu.org/licenses/lgpl-3.0-standalone.html"><img alt="License: LGPL-3" src="https://img.shields.io/badge/licence-LGPL--3-blue.png" /></a> <a class="reference external" href="https://github.com/OCA/queue/tree/12.0/queue_job"><img alt="OCA/queue" src="https://img.shields.io/badge/github-OCA%2Fqueue-lightgray.png?logo=github" /></a> <a class="reference external" href="https://translation.odoo-community.org/projects/queue-12-0/queue-12-0-queue_job"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external" href="https://runbot.odoo-community.org/runbot/230/12.0"><img alt="Try me on Runbot" src="https://img.shields.io/badge/runbot-Try%20me-875A7B.png" /></a></p>
<p>This addon adds an integrated Job Queue to Odoo.</p>
<p>It allows to postpone method calls executed asynchronously.</p>
<p>Jobs are executed in the background by a <tt class="docutils literal">Jobrunner</tt>, in their own transaction.</p>
<p>Example:</p>
<pre class="code python literal-block">
<span class="kn">from</span> <span class="nn">odoo</span> <span class="kn">import</span> <span class="n">models</span><span class="p">,</span> <span class="n">fields</span><span class="p">,</span> <span class="n">api</span>
<span class="kn">from</span> <span class="nn">odoo.addons.queue_job.job</span> <span class="kn">import</span> <span class="n">job</span>
<span class="k">class</span> <span class="nc">MyModel</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span>
<span class="n">_name</span> <span class="o">=</span> <span class="s1">'my.model'</span>
<span class="nd">@api</span><span class="o">.</span><span class="n">multi</span>
<span class="nd">@job</span>
<span class="k">def</span> <span class="nf">my_method</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">k</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">_logger</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s1">'executed with a: </span><span class="si">%s</span><span class="s1"> and k: </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">a</span><span class="p">,</span> <span class="n">k</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">MyOtherModel</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span>
<span class="n">_name</span> <span class="o">=</span> <span class="s1">'my.other.model'</span>
<span class="nd">@api</span><span class="o">.</span><span class="n">multi</span>
<span class="k">def</span> <span class="nf">button_do_stuff</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">env</span><span class="p">[</span><span class="s1">'my.model'</span><span class="p">]</span><span class="o">.</span><span class="n">with_delay</span><span class="p">()</span><span class="o">.</span><span class="n">my_method</span><span class="p">(</span><span class="s1">'a'</span><span class="p">,</span> <span class="n">k</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
</pre>
<p>In the snippet of code above, when we call <tt class="docutils literal">button_do_stuff</tt>, 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.</p>
<p>Features:</p>
<ul class="simple">
<li>Views for jobs, jobs are stored in PostgreSQL</li>
<li>Jobrunner: execute the jobs, highly efficient thanks to PostgreSQL’s NOTIFY</li>
<li>Channels: give a capacity for the root channel and its sub-channels and
segregate jobs in them. Allow for instance to restrict heavy jobs to be
executed one at a time while little ones are executed 4 at a times.</li>
<li>Retries: Ability to retry jobs by raising a type of exception</li>
<li>Retry Pattern: the 3 first tries, retry after 10 seconds, the 5 next tries,
retry after 1 minutes, …</li>
<li>Job properties: priorities, estimated time of arrival (ETA), custom
description, number of retries</li>
<li>Related Actions: link an action on the job view, such as open the record
concerned by the job</li>
</ul>
<p><strong>Table of contents</strong></p>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#installation" id="id11">Installation</a></li>
<li><a class="reference internal" href="#configuration" id="id12">Configuration</a></li>
<li><a class="reference internal" href="#usage" id="id13">Usage</a><ul>
<li><a class="reference internal" href="#developers" id="id14">Developers</a></li>
<li><a class="reference internal" href="#tips-and-tricks" id="id15">Tips and tricks</a></li>
<li><a class="reference internal" href="#patterns" id="id16">Patterns</a></li>
</ul>
</li>
<li><a class="reference internal" href="#known-issues-roadmap" id="id17">Known issues / Roadmap</a></li>
<li><a class="reference internal" href="#changelog" id="id18">Changelog</a><ul>
<li><a class="reference internal" href="#next" id="id19">Next</a></li>
<li><a class="reference internal" href="#id3" id="id20">12.0.1.1.0 (2019-11-01)</a></li>
<li><a class="reference internal" href="#id10" id="id21">12.0.1.0.0 (2018-10-02)</a></li>
</ul>
</li>
<li><a class="reference internal" href="#bug-tracker" id="id22">Bug Tracker</a></li>
<li><a class="reference internal" href="#credits" id="id23">Credits</a><ul>
<li><a class="reference internal" href="#authors" id="id24">Authors</a></li>
<li><a class="reference internal" href="#contributors" id="id25">Contributors</a></li>
<li><a class="reference internal" href="#maintainers" id="id26">Maintainers</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="installation">
<h1><a class="toc-backref" href="#id11">Installation</a></h1>
<p>Be sure to have the <tt class="docutils literal">requests</tt> library.</p>
</div>
<div class="section" id="configuration">
<h1><a class="toc-backref" href="#id12">Configuration</a></h1>
<ul class="simple">
<li>Using environment variables and command line:<ul>
<li>Adjust environment variables (optional):<ul>
<li><tt class="docutils literal">ODOO_QUEUE_JOB_CHANNELS=root:4</tt> or any other channels configuration.
The default is <tt class="docutils literal">root:1</tt></li>
<li>if <tt class="docutils literal">xmlrpc_port</tt> is not set: <tt class="docutils literal">ODOO_QUEUE_JOB_PORT=8069</tt></li>
</ul>
</li>
<li>Start Odoo with <tt class="docutils literal"><span class="pre">--load=web,queue_job</span></tt>
and <tt class="docutils literal"><span class="pre">--workers</span></tt> greater than 1. <a class="footnote-reference" href="#id2" id="id1">[1]</a></li>
</ul>
</li>
<li>Using the Odoo configuration file:</li>
</ul>
<pre class="code ini literal-block">
<span class="k">[options]</span>
<span class="na">(...)</span>
<span class="na">workers</span> <span class="o">=</span> <span class="s">6</span>
<span class="na">server_wide_modules</span> <span class="o">=</span> <span class="s">web,queue_job</span>
<span class="na">(...)</span>
<span class="k">[queue_job]</span>
<span class="na">channels</span> <span class="o">=</span> <span class="s">root:2</span>
</pre>
<ul class="simple">
<li>Confirm the runner is starting correctly by checking the odoo log file:</li>
</ul>
<pre class="code literal-block">
...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 <dbname>
...INFO...queue_job.jobrunner.runner: database connections ready
</pre>
<ul class="simple">
<li>Create jobs (eg using <tt class="docutils literal">base_import_async</tt>) and observe they
start immediately and in parallel.</li>
<li>Tip: to enable debug logging for the queue job, use
<tt class="docutils literal"><span class="pre">--log-handler=odoo.addons.queue_job:DEBUG</span></tt></li>
</ul>
<table class="docutils footnote" frame="void" id="id2" rules="none">
<colgroup><col class="label" /><col /></colgroup>
<tbody valign="top">
<tr><td class="label"><a class="fn-backref" href="#id1">[1]</a></td><td>It works with the threaded Odoo server too, although this way
of running Odoo is obviously not for production purposes.</td></tr>
</tbody>
</table>
</div>
<div class="section" id="usage">
<h1><a class="toc-backref" href="#id13">Usage</a></h1>
<p>To use this module, you need to:</p>
<ol class="arabic simple">
<li>Go to <tt class="docutils literal">Job Queue</tt> menu</li>
</ol>
<div class="section" id="developers">
<h2><a class="toc-backref" href="#id14">Developers</a></h2>
<p><strong>Bypass jobs on running Odoo</strong></p>
<p>When you are developing (ie: connector modules) you might want
to bypass the queue job and run your code immediately.</p>
<p>To do so you can set <cite>TEST_QUEUE_JOB_NO_DELAY=1</cite> in your enviroment.</p>
<p><strong>Bypass jobs in tests</strong></p>
<p>When writing tests on job-related methods is always tricky to deal with
delayed recordsets. To make your testing life easier
you can set <cite>test_queue_job_no_delay=True</cite> in the context.</p>
<p>Tip: you can do this at test case level like this</p>
<pre class="code python literal-block">
<span class="nd">@classmethod</span>
<span class="k">def</span> <span class="nf">setUpClass</span><span class="p">(</span><span class="bp">cls</span><span class="p">):</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">setUpClass</span><span class="p">()</span>
<span class="bp">cls</span><span class="o">.</span><span class="n">env</span> <span class="o">=</span> <span class="bp">cls</span><span class="o">.</span><span class="n">env</span><span class="p">(</span><span class="n">context</span><span class="o">=</span><span class="nb">dict</span><span class="p">(</span>
<span class="bp">cls</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">context</span><span class="p">,</span>
<span class="n">test_queue_job_no_delay</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="c1"># no jobs thanks</span>
<span class="p">))</span>
</pre>
<p>Then all your tests execute the job methods synchronously
without delaying any jobs.</p>
</div>
<div class="section" id="tips-and-tricks">
<h2><a class="toc-backref" href="#id15">Tips and tricks</a></h2>
<ul class="simple">
<li><strong>Idempotency</strong> (<a class="reference external" href="https://www.restapitutorial.com/lessons/idempotency.html">https://www.restapitutorial.com/lessons/idempotency.html</a>): The queue_job should be idempotent so they can be retried several times without impact on the data.</li>
<li><strong>The job should test at the very beginning its relevance</strong>: 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.</li>
</ul>
</div>
<div class="section" id="patterns">
<h2><a class="toc-backref" href="#id16">Patterns</a></h2>
<p>Through the time, two main patterns emerged:</p>
<ol class="arabic simple">
<li>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</li>
<li>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.</li>
</ol>
</div>
</div>
<div class="section" id="known-issues-roadmap">
<h1><a class="toc-backref" href="#id17">Known issues / Roadmap</a></h1>
<ul class="simple">
<li>After creating a new database or installing <tt class="docutils literal">queue_job</tt> on an
existing database, Odoo must be restarted for the runner to detect it.</li>
<li>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
<tt class="docutils literal">started</tt> or <tt class="docutils literal">enqueued</tt> 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 <em>before starting Odoo</em>:</li>
</ul>
<pre class="code sql literal-block">
<span class="k">update</span> <span class="n">queue_job</span> <span class="k">set</span> <span class="k">state</span><span class="o">=</span><span class="s1">'pending'</span> <span class="k">where</span> <span class="k">state</span> <span class="k">in</span> <span class="p">(</span><span class="s1">'started'</span><span class="p">,</span> <span class="s1">'enqueued'</span><span class="p">)</span>
</pre>
</div>
<div class="section" id="changelog">
<h1><a class="toc-backref" href="#id18">Changelog</a></h1>
<!-- [ The change log. The goal of this file is to help readers
understand changes between version. The primary audience is
end users and integrators. Purely technical changes such as
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<div class="section" id="next">
<h2><a class="toc-backref" href="#id19">Next</a></h2>
</div>
<div class="section" id="id3">
<h2><a class="toc-backref" href="#id20">12.0.1.1.0 (2019-11-01)</a></h2>
<p>Important: the license has been changed from AGPL3 to LGPL3.</p>
<ul class="simple">
<li>[IMP] Dont’ start the Jobrunner if root channel’s capacity
is explicitly set to 0</li>
<li>[ADD] Ability to set several jobs to done using an multi-action
(port of <a class="reference external" href="https://github.com/OCA/queue/pull/59">#59</a>)</li>
<li>[REF] Extract a method handling the post of a message when a job is failed,
allowing to modify this behavior from addons</li>
<li>[ADD] Allow Jobrunner configuration from server_environment
(details on <a class="reference external" href="https://github.com/OCA/queue/pull/124">#124</a>)</li>
<li>[ADD] Environment variable <tt class="docutils literal">TEST_QUEUE_JOB_NO_DELAY=1</tt> for test and debug
(details on <a class="reference external" href="https://github.com/OCA/queue/pull/114">#114</a>)</li>
<li>[FIX] race condition under pressure, when starting a job takes more than 1 second
(details on <a class="reference external" href="https://github.com/OCA/queue/pull/131">#131</a>)</li>
<li>[FIX] <tt class="docutils literal">retry_postone</tt> on a job could be rollbacked on errors
(details on <a class="reference external" href="https://github.com/OCA/queue/pull/130">#130</a>)</li>
<li>[FIX] Autovacuum cron job misconfiguration
(details on <a class="reference external" href="https://github.com/OCA/queue/pull/163">#163</a>)</li>
</ul>
</div>
<div class="section" id="id10">
<h2><a class="toc-backref" href="#id21">12.0.1.0.0 (2018-10-02)</a></h2>
<ul class="simple">
<li>[MIGRATION] from 11.0 branched at rev. b0945be</li>
</ul>
</div>
</div>
<div class="section" id="bug-tracker">
<h1><a class="toc-backref" href="#id22">Bug Tracker</a></h1>
<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/queue/issues">GitHub Issues</a>.
In case of trouble, please check there if your issue has already been reported.
If you spotted it first, help us smashing it by providing a detailed and welcomed
<a class="reference external" href="https://github.com/OCA/queue/issues/new?body=module:%20queue_job%0Aversion:%2012.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
<p>Do not contact contributors directly about support or help with technical issues.</p>
</div>
<div class="section" id="credits">
<h1><a class="toc-backref" href="#id23">Credits</a></h1>
<div class="section" id="authors">
<h2><a class="toc-backref" href="#id24">Authors</a></h2>
<ul class="simple">
<li>Camptocamp</li>
<li>ACSONE SA/NV</li>
</ul>
</div>
<div class="section" id="contributors">
<h2><a class="toc-backref" href="#id25">Contributors</a></h2>
<ul class="simple">
<li>Guewen Baconnier <<a class="reference external" href="mailto:guewen.baconnier@camptocamp.com">guewen.baconnier@camptocamp.com</a>></li>
<li>Stéphane Bidoul <<a class="reference external" href="mailto:stephane.bidoul@acsone.eu">stephane.bidoul@acsone.eu</a>></li>
<li>Matthieu Dietrich <<a class="reference external" href="mailto:matthieu.dietrich@camptocamp.com">matthieu.dietrich@camptocamp.com</a>></li>
<li>Jos De Graeve <<a class="reference external" href="mailto:Jos.DeGraeve@apertoso.be">Jos.DeGraeve@apertoso.be</a>></li>
<li>David Lefever <<a class="reference external" href="mailto:dl@taktik.be">dl@taktik.be</a>></li>
<li>Laurent Mignon <<a class="reference external" href="mailto:laurent.mignon@acsone.eu">laurent.mignon@acsone.eu</a>></li>
<li>Laetitia Gangloff <<a class="reference external" href="mailto:laetitia.gangloff@acsone.eu">laetitia.gangloff@acsone.eu</a>></li>
<li>Cédric Pigeon <<a class="reference external" href="mailto:cedric.pigeon@acsone.eu">cedric.pigeon@acsone.eu</a>></li>
</ul>
</div>
<div class="section" id="maintainers">
<h2><a class="toc-backref" href="#id26">Maintainers</a></h2>
<p>This module is maintained by the OCA.</p>
<a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
<p>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.</p>
<p>Current <a class="reference external" href="https://odoo-community.org/page/maintainer-role">maintainer</a>:</p>
<p><a class="reference external" href="https://github.com/guewen"><img alt="guewen" src="https://github.com/guewen.png?size=40px" /></a></p>
<p>This module is part of the <a class="reference external" href="https://github.com/OCA/queue/tree/12.0/queue_job">OCA/queue</a> project on GitHub.</p>
<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
</div>
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