analytics/Plausible.Imported.Importer.html
2024-04-18 14:02:32 +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.</li><li><code class="inline">before_start/1</code> - Optional callback run right before scheduling import job. It's
expected to either return <code class="inline">:ok</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.</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="4614049121-1">{</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="4614049121-1">}</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="4614049121-2">(</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="4614049121-3">(</span><span class="p" data-group-id="4614049121-3">)</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="4614049121-2">)</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="4614049121-4">[</span><span class="ss">:import_id</span><span class="p" data-group-id="4614049121-4">]</span><span class="w">
</span><span class="k">receive</span><span class="w"> </span><span class="k" data-group-id="4614049121-5">do</span><span class="w">
</span><span class="p" data-group-id="4614049121-6">{</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="4614049121-7">%{</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="4614049121-7">}</span><span class="p" data-group-id="4614049121-6">}</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="4614049121-8">(</span><span class="s">&quot;Job completed&quot;</span><span class="p" data-group-id="4614049121-8">)</span><span class="w">
</span><span class="p" data-group-id="4614049121-9">{</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="4614049121-10">%{</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="4614049121-10">}</span><span class="p" data-group-id="4614049121-9">}</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="4614049121-11">(</span><span class="s">&quot;Job failed transiently&quot;</span><span class="p" data-group-id="4614049121-11">)</span><span class="w">
</span><span class="p" data-group-id="4614049121-12">{</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="4614049121-13">%{</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="4614049121-13">}</span><span class="p" data-group-id="4614049121-12">}</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="4614049121-14">(</span><span class="s">&quot;Job failed permanently&quot;</span><span class="p" data-group-id="4614049121-14">)</span><span class="w">
</span><span class="k" data-group-id="4614049121-5">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="4614049121-15">(</span><span class="s">&quot;Job didn&#39;t finish in 15 seconds&quot;</span><span class="p" data-group-id="4614049121-15">)</span><span class="w">
</span><span class="k" data-group-id="4614049121-5">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/1" translate="no">before_start(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/1">
<div class="detail-header">
<a href="#c:before_start/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">before_start(t)</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>
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<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>()) ::
:ok | {:ok, <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">map</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#L100" 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#L102" 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>()}</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#L99" 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#L98" class="icon-action" rel="help" title="View Source">
<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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</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#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> on_failure(<a href="Plausible.Imported.SiteImport.html#t:t/0">Plausible.Imported.SiteImport.t</a>()) :: :ok</pre>
</div>
</section>
</section>
<section class="detail" id="c:on_success/2">
<div class="detail-header">
<a href="#c:on_success/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>
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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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