analytics/Plausible.Imported.Importer.html
2024-09-03 07:37:54 +00:00

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<h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L1" title="View Source" class="icon-action" rel="help">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span translate="no">Plausible.Imported.Importer</span> <small>behaviour</small>
<small class="app-vsn" translate="no">(Plausible v0.0.1)</small>
</h1>
<section id="moduledoc">
<p>Behaviour that should be implemented for each import source.</p><p>All imports are executed as background jobs run via <a href="Plausible.Workers.ImportAnalytics.html"><code class="inline">Plausible.Workers.ImportAnalytics</code></a>
Oban worker. Each import source must define a module conforming <code class="inline">Importer</code> behaviour.</p><p>The callbacks that need to be implemented:</p><ul><li><code class="inline">name/0</code> - Returns import source name as an atom. Example: <code class="inline">:universal_analytics</code>.</li><li><code class="inline">label/0</code> - Descriptive, display friendly name of the source.
Example: &quot;Google Analytics&quot;.</li><li><code class="inline">email_template/0</code> - Name of the email template to use for notifications in
<a href="PlausibleWeb.Email.html"><code class="inline">PlausibleWeb.Email</code></a> (<code class="inline">import_success</code> and <code class="inline">import_failure</code>). The template
should have content customized for a particular source.</li><li><code class="inline">parse_args/1</code> - Receives Oban job arguments coming from <code class="inline">new_import/3</code>. Whatever
options were passed to <code class="inline">new_import/3</code> will be present in the input map with string
keys and values serialized to primitives. If, for instance <code class="inline">start_date: ~D[2024-01-03]</code>
is passed as an option, <code class="inline">parse_args/1</code> receives <code class="inline">%{..., &quot;start_date&quot; =&gt; &quot;2024-01-03&quot;}</code>.
The expectation is parsing the map values producing a keyword list of options to
pass to <code class="inline">import_data/2</code>.</li><li><code class="inline">import_data/2</code> - Receives site import struct and options produced by <code class="inline">parse_args/1</code>.
This is where all the import processing is done. The way the import is implemented
is entirely arbitrary except the requirement that the process as a whole must
by synchronous. The callback is expected to return either <code class="inline">:ok</code> or <code class="inline">{:ok, %{...}}</code>
on successful import or <code class="inline">{:error, ...}</code> on failure. The map in success tuple is
used for updating site import struct and is passed to <code class="inline">on_success/2</code> callback.
Please note that error tuple should be only returned on errors that can't be
recovered from. For transient errors, the import should throw an exception or
simply crash. The error tuple has an alternative <code class="inline">{error, reason, opts}</code> form,
where <code class="inline">opts</code> allow to skip purging imported data so far via <code class="inline">skip_purge?</code> flag
and skip marking the import as failed and notifying the user via <code class="inline">skip_mark_failed?</code>
flag. Both flags are booleans.</li><li><code class="inline">before_start/2</code> - Optional callback run right before scheduling import job. It's
expected to either return <code class="inline">{:ok, site_import}</code> for the import to proceed
or <code class="inline">{:error, ...}</code> tuple, which will be returned from <code class="inline">new_import/3</code> call.
The <code class="inline">site_import</code> can be altered or replaced at this stage. The second argument
are opts passed to <code class="inline">new_import/3</code>.</li><li><code class="inline">on_success/2</code> - Optional callback run once site import is completed. Receives map
returned from <code class="inline">import_data/2</code>. Expected to always return <code class="inline">:ok</code>.</li><li><code class="inline">on_failure/1</code> - Optional callback run when import job fails permanently.</li></ul><p>All sources must be added to the list in <a href="Plausible.Imported.ImportSources.html"><code class="inline">Plausible.Imported.ImportSources</code></a>.</p><p>In order to schedule a new import job using a given source, respective importer's
<code class="inline">new_import/3</code> function must be called. It accepts site, user who is doing the import
and any options necessary to carry out the import.</p><p>There's an expectation that <code class="inline">start_date</code> and <code class="inline">end_date</code> are provided either as options
passed to <code class="inline">new_import/3</code> or data in map returned from <code class="inline">import_data/2</code>. If these parameters
are not provided, the import will eventually crash. These parameters define time range
of imported data which is in turn used for efficient querying.</p><p>Logic running inside <code class="inline">import_data/2</code> is expected to populated all <code class="inline">imported_*</code> tables
in ClickHouse with <code class="inline">import_id</code> column set to site import's ID.</p><p>Managing any configuration or authentication prior to running import is outside of
scope of importer logic and is expected to be implemented separately.</p><h2 id="module-running-import-fully-synchronously" class="section-heading">
<a href="#module-running-import-fully-synchronously" class="hover-link">
<i class="ri-link-m" aria-hidden="true"></i>
</a>
<span class="text">Running import fully synchronously</span>
</h2>
<p>In case it's necessary to run the whole import job fully synchronously, the
<a href="Plausible.Workers.ImportAnalytics.html"><code class="inline">Plausible.Workers.ImportAnalytics</code></a> worker sends an <a href="https://hexdocs.pm/oban/2.17.2/Oban.Notifier.html"><code class="inline">Oban.Notifier</code></a> message
on completion, failure or transient failure of the import.</p><p>A basic usage scenario looks like this:</p><pre><code class="makeup elixir" translate="no"><span class="p" data-group-id="4764618623-1">{</span><span class="ss">:ok</span><span class="p">,</span><span class="w"> </span><span class="n">job</span><span class="p" data-group-id="4764618623-1">}</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nc">Plausible.Imported.NoopImporter</span><span class="o">.</span><span class="n">new_import</span><span class="p" data-group-id="4764618623-2">(</span><span class="w">
</span><span class="n">site</span><span class="p">,</span><span class="w">
</span><span class="n">user</span><span class="p">,</span><span class="w">
</span><span class="ss">start_date</span><span class="p">:</span><span class="w"> </span><span class="ld">~D[2005-01-01]</span><span class="p">,</span><span class="w">
</span><span class="ss">end_date</span><span class="p">:</span><span class="w"> </span><span class="nc">Date</span><span class="o">.</span><span class="n">utc_today</span><span class="p" data-group-id="4764618623-3">(</span><span class="p" data-group-id="4764618623-3">)</span><span class="p">,</span><span class="w">
</span><span class="c1"># this option is necessary to setup the calling process as listener</span><span class="w">
</span><span class="ss">listen?</span><span class="p">:</span><span class="w"> </span><span class="no">true</span><span class="w">
</span><span class="p" data-group-id="4764618623-2">)</span><span class="w">
</span><span class="n">import_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">job</span><span class="o">.</span><span class="n">args</span><span class="p" data-group-id="4764618623-4">[</span><span class="ss">:import_id</span><span class="p" data-group-id="4764618623-4">]</span><span class="w">
</span><span class="k">receive</span><span class="w"> </span><span class="k" data-group-id="4764618623-5">do</span><span class="w">
</span><span class="p" data-group-id="4764618623-6">{</span><span class="ss">:notification</span><span class="p">,</span><span class="w"> </span><span class="ss">:analytics_imports_jobs</span><span class="p">,</span><span class="w"> </span><span class="p" data-group-id="4764618623-7">%{</span><span class="s">&quot;event&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="s">&quot;complete&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;import_id&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="o">^</span><span class="n">import_id</span><span class="p" data-group-id="4764618623-7">}</span><span class="p" data-group-id="4764618623-6">}</span><span class="w"> </span><span class="o">-&gt;</span><span class="w">
</span><span class="nc">IO</span><span class="o">.</span><span class="n">puts</span><span class="p" data-group-id="4764618623-8">(</span><span class="s">&quot;Job completed&quot;</span><span class="p" data-group-id="4764618623-8">)</span><span class="w">
</span><span class="p" data-group-id="4764618623-9">{</span><span class="ss">:notification</span><span class="p">,</span><span class="w"> </span><span class="ss">:analytics_imports_jobs</span><span class="p">,</span><span class="w"> </span><span class="p" data-group-id="4764618623-10">%{</span><span class="s">&quot;event&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="s">&quot;transient_fail&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;import_id&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="o">^</span><span class="n">import_id</span><span class="p" data-group-id="4764618623-10">}</span><span class="p" data-group-id="4764618623-9">}</span><span class="w"> </span><span class="o">-&gt;</span><span class="w">
</span><span class="nc">IO</span><span class="o">.</span><span class="n">puts</span><span class="p" data-group-id="4764618623-11">(</span><span class="s">&quot;Job failed transiently&quot;</span><span class="p" data-group-id="4764618623-11">)</span><span class="w">
</span><span class="p" data-group-id="4764618623-12">{</span><span class="ss">:notification</span><span class="p">,</span><span class="w"> </span><span class="ss">:analytics_imports_jobs</span><span class="p">,</span><span class="w"> </span><span class="p" data-group-id="4764618623-13">%{</span><span class="s">&quot;event&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="s">&quot;fail&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;import_id&quot;</span><span class="w"> </span><span class="p">=&gt;</span><span class="w"> </span><span class="o">^</span><span class="n">import_id</span><span class="p" data-group-id="4764618623-13">}</span><span class="p" data-group-id="4764618623-12">}</span><span class="w"> </span><span class="o">-&gt;</span><span class="w">
</span><span class="nc">IO</span><span class="o">.</span><span class="n">puts</span><span class="p" data-group-id="4764618623-14">(</span><span class="s">&quot;Job failed permanently&quot;</span><span class="p" data-group-id="4764618623-14">)</span><span class="w">
</span><span class="k" data-group-id="4764618623-5">after</span><span class="w">
</span><span class="mi">15_000</span><span class="w"> </span><span class="o">-&gt;</span><span class="w">
</span><span class="nc">IO</span><span class="o">.</span><span class="n">puts</span><span class="p" data-group-id="4764618623-15">(</span><span class="s">&quot;Job didn&#39;t finish in 15 seconds&quot;</span><span class="p" data-group-id="4764618623-15">)</span><span class="w">
</span><span class="k" data-group-id="4764618623-5">end</span></code></pre><p>In a more realistic scenario, job scheduling will be done inside a GenServer process
like LiveView, where notifications can be listened for via <code class="inline">handle_info/2</code>.</p>
</section>
<section id="summary" class="details-list">
<h1 class="section-heading">
<a class="hover-link" href="#summary">
<i class="ri-link-m" aria-hidden="true"></i>
</a>
<span class="text">Summary</span>
</h1>
<div class="summary-callbacks summary">
<h2>
<a href="#callbacks">Callbacks</a>
</h2>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:before_start/2" translate="no">before_start(t, t)</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:email_template/0" translate="no">email_template()</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:import_data/2" translate="no">import_data(t, t)</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:label/0" translate="no">label()</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:name/0" translate="no">name()</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:on_failure/1" translate="no">on_failure(t)</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:on_success/2" translate="no">on_success(t, map)</a>
</div>
</div>
<div class="summary-row">
<div class="summary-signature">
<a href="#c:parse_args/1" translate="no">parse_args(map)</a>
</div>
</div>
</div>
<div class="summary-functions summary">
<h2>
<a href="#functions">Functions</a>
</h2>
<div class="summary-row">
<div class="summary-signature">
<a href="#listen/0" translate="no">listen()</a>
</div>
<div class="summary-synopsis"><p>Allows to explicitly start listening for importer job notifications.</p></div>
</div>
</div>
</section>
<section id="callbacks" class="details-list">
<h1 class="section-heading">
<a class="hover-link" href="#callbacks">
<i class="ri-link-m" aria-hidden="true"></i>
</a>
<span class="text">Callbacks</span>
</h1>
<div class="callbacks-list">
<section class="detail" id="c:before_start/2">
<div class="detail-header">
<a href="#c:before_start/2" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">before_start(t, t)</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L109" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
<span class="sr-only">View Source</span>
</a>
</div>
<section class="docstring">
<div class="specs">
<pre translate="no"><span class="attribute">@callback</span> before_start(<a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>(), <a href="https://hexdocs.pm/elixir/Keyword.html#t:t/0">Keyword.t</a>()) ::
{:ok, <a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>()} | {:error, <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">any</a>()}</pre>
</div>
</section>
</section>
<section class="detail" id="c:email_template/0">
<div class="detail-header">
<a href="#c:email_template/0" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">email_template()</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L105" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
<span class="sr-only">View Source</span>
</a>
</div>
<section class="docstring">
<div class="specs">
<pre translate="no"><span class="attribute">@callback</span> email_template() :: <a href="https://hexdocs.pm/elixir/String.html#t:t/0">String.t</a>()</pre>
</div>
</section>
</section>
<section class="detail" id="c:import_data/2">
<div class="detail-header">
<a href="#c:import_data/2" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">import_data(t, t)</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L107" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
<span class="sr-only">View Source</span>
</a>
</div>
<section class="docstring">
<div class="specs">
<pre translate="no"><span class="attribute">@callback</span> import_data(<a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>(), <a href="https://hexdocs.pm/elixir/Keyword.html#t:t/0">Keyword.t</a>()) ::
:ok | {:error, <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">any</a>()} | {:error, <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">any</a>(), <a href="https://hexdocs.pm/elixir/Keyword.html#t:t/0">Keyword.t</a>()}</pre>
</div>
</section>
</section>
<section class="detail" id="c:label/0">
<div class="detail-header">
<a href="#c:label/0" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">label()</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L104" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
<span class="sr-only">View Source</span>
</a>
</div>
<section class="docstring">
<div class="specs">
<pre translate="no"><span class="attribute">@callback</span> label() :: <a href="https://hexdocs.pm/elixir/String.html#t:t/0">String.t</a>()</pre>
</div>
</section>
</section>
<section class="detail" id="c:name/0">
<div class="detail-header">
<a href="#c:name/0" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">name()</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L103" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
<span class="sr-only">View Source</span>
</a>
</div>
<section class="docstring">
<div class="specs">
<pre translate="no"><span class="attribute">@callback</span> name() :: <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">atom</a>()</pre>
</div>
</section>
</section>
<section class="detail" id="c:on_failure/1">
<div class="detail-header">
<a href="#c:on_failure/1" class="detail-link" title="Link to this callback">
<i class="ri-link-m" aria-hidden="true"></i>
<span class="sr-only">Link to this callback</span>
</a>
<h1 class="signature" translate="no">on_failure(t)</h1>
<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/imported/importer.ex#L111" class="icon-action" rel="help" title="View Source">
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<pre translate="no"><span class="attribute">@callback</span> on_failure(<a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>()) :: :ok</pre>
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<h1 class="signature" translate="no">on_success(t, map)</h1>
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<pre translate="no"><span class="attribute">@callback</span> on_success(<a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>(), <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">map</a>()) :: :ok</pre>
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<h1 class="signature" translate="no">parse_args(map)</h1>
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<pre translate="no"><span class="attribute">@callback</span> parse_args(<a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">map</a>()) :: <a href="https://hexdocs.pm/elixir/Keyword.html#t:t/0">Keyword.t</a>()</pre>
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<h1 class="signature" translate="no">listen()</h1>
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<pre translate="no"><span class="attribute">@spec</span> listen() :: :ok</pre>
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<p>Allows to explicitly start listening for importer job notifications.</p><p>Listener must explicitly filter out a subset of imports that apply to the given context.</p>
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