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Plausible
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v0.0.1
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L1" title="View Source" class="icon-action" rel="help">
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<span translate="no">Plausible.Ingestion.Counters.Buffer</span>
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<small class="app-vsn" translate="no">(Plausible v0.0.1)</small>
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</h1>
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<section id="moduledoc">
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<p>A buffer aggregating counters for internal metrics, within 10 seconds time buckets.</p><p>See <a href="Plausible.Ingestion.Counters.html"><code class="inline">Plausible.Ingestion.Counters</code></a> for integration.</p><p>Flushing is by default possible only once the 10s bucket is complete
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(its window has moved). This is to avoid race conditions
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when clearing up the buffer on dequeue - because there is no atomic "get and delete",
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and items are buffered concurrently, there is a gap between get and delete
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in which items written may disappear otherwise.</p><p><code class="inline">aggregate_bucket_fn</code> and <code class="inline">flush_boundary_fn</code> control that semantics and
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are configurable only for test purposes.</p>
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</section>
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<h1 class="section-heading">
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<a class="hover-link" href="#summary">
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<i class="ri-link-m" aria-hidden="true"></i>
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Summary
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</a>
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</h1>
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<div class="summary-types summary">
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<h2>
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<a href="#types">Types</a>
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</h2>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#t:bucket_fn_opt/0" translate="no">bucket_fn_opt()</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#t:t/0" translate="no">t()</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#t:unix_timestamp/0" translate="no">unix_timestamp()</a>
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</div>
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</div>
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</div>
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<div class="summary-functions summary">
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<h2>
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<a href="#functions">Functions</a>
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</h2>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#aggregate/4" translate="no">aggregate(buffer, metric, domain, timestamp)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#bucket_10s/1" translate="no">bucket_10s(datetime)</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#flush/2" translate="no">flush(buffer, now \\ DateTime.utc_now())</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#new/2" translate="no">new(buffer_name, opts \\ [])</a>
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</div>
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</div>
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<div class="summary-row">
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<div class="summary-signature">
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<a href="#previous_10s/1" translate="no">previous_10s(datetime)</a>
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</div>
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</div>
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</div>
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</section>
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<section id="types" class="details-list">
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<h1 class="section-heading">
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<a class="hover-link" href="#types">
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<i class="ri-link-m" aria-hidden="true"></i>
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Types
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</a>
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</h1>
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<div class="types-list">
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<section class="detail" id="t:bucket_fn_opt/0">
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<div class="detail-header">
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<a href="#t:bucket_fn_opt/0" class="detail-link" title="Link to this type">
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<h1 class="signature" translate="no">bucket_fn_opt()</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L23" class="icon-action" rel="help" title="View Source">
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<span class="sr-only">View Source</span>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@type</span> bucket_fn_opt() ::
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{:aggregate_bucket_fn, (<a href="https://hexdocs.pm/elixir/NaiveDateTime.html#t:t/0">NaiveDateTime.t</a>() -> <a href="#t:unix_timestamp/0">unix_timestamp</a>())}
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| {:flush_boundary_fn, (<a href="https://hexdocs.pm/elixir/DateTime.html#t:t/0">DateTime.t</a>() -> <a href="#t:unix_timestamp/0">unix_timestamp</a>())}</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="t:t/0">
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<a href="#t:t/0" class="detail-link" title="Link to this type">
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<h1 class="signature" translate="no">t()</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L21" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@type</span> t() :: %Plausible.Ingestion.Counters.Buffer{
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aggregate_bucket_fn: <a href="https://hexdocs.pm/elixir/typespecs.html#built-in-types">term</a>(),
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buffer_name: <a href="https://hexdocs.pm/elixir/typespecs.html#built-in-types">term</a>(),
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flush_boundary_fn: <a href="https://hexdocs.pm/elixir/typespecs.html#built-in-types">term</a>()
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}</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="t:unix_timestamp/0">
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<a href="#t:unix_timestamp/0" class="detail-link" title="Link to this type">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this type</span>
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</a>
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<h1 class="signature" translate="no">unix_timestamp()</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L22" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@type</span> unix_timestamp() :: <a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">pos_integer</a>()</pre>
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</div>
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</section>
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</section>
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</div>
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</section>
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<section id="functions" class="details-list">
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<h1 class="section-heading">
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<a class="hover-link" href="#functions">
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<i class="ri-link-m" aria-hidden="true"></i>
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Functions
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</a>
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</h1>
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<div class="functions-list">
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<section class="detail" id="aggregate/4">
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<div class="detail-header">
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<a href="#aggregate/4" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">aggregate(buffer, metric, domain, timestamp)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L49" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@spec</span> aggregate(<a href="#t:t/0">t</a>(), <a href="https://hexdocs.pm/elixir/typespecs.html#built-in-types">binary</a>(), <a href="https://hexdocs.pm/elixir/typespecs.html#built-in-types">binary</a>(), timestamp :: <a href="https://hexdocs.pm/elixir/NaiveDateTime.html#t:t/0">NaiveDateTime.t</a>()) :: <a href="#t:t/0">t</a>()</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="bucket_10s/1">
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<div class="detail-header">
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<a href="#bucket_10s/1" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">bucket_10s(datetime)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L92" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@spec</span> bucket_10s(<a href="https://hexdocs.pm/elixir/NaiveDateTime.html#t:t/0">NaiveDateTime.t</a>()) :: <a href="#t:unix_timestamp/0">unix_timestamp</a>()</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="flush/2">
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<span id="flush/1"></span>
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<div class="detail-header">
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<a href="#flush/2" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">flush(buffer, now \\ DateTime.utc_now())</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L68" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@spec</span> flush(<a href="#t:t/0">t</a>(), now :: <a href="https://hexdocs.pm/elixir/DateTime.html#t:t/0">DateTime.t</a>()) :: [<a href="Plausible.Ingestion.Counters.Record.html#t:t/0">Plausible.Ingestion.Counters.Record.t</a>()]</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="new/2">
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<span id="new/1"></span>
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<div class="detail-header">
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<a href="#new/2" class="detail-link" title="Link to this function">
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">new(buffer_name, opts \\ [])</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L35" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@spec</span> new(<a href="https://hexdocs.pm/elixir/typespecs.html#basic-types">atom</a>(), [<a href="#t:bucket_fn_opt/0">bucket_fn_opt</a>()]) :: <a href="#t:t/0">t</a>()</pre>
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</div>
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</section>
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</section>
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<section class="detail" id="previous_10s/1">
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<div class="detail-header">
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<a href="#previous_10s/1" class="detail-link" title="Link to this function">
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<i class="ri-link-m" aria-hidden="true"></i>
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<span class="sr-only">Link to this function</span>
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</a>
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<h1 class="signature" translate="no">previous_10s(datetime)</h1>
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<a href="https://github.com/plausible/analytics/blob/main/lib/plausible/ingestion/counters/buffer.ex#L101" class="icon-action" rel="help" title="View Source">
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<i class="ri-code-s-slash-line" aria-hidden="true"></i>
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<span class="sr-only">View Source</span>
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</a>
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</div>
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<section class="docstring">
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<div class="specs">
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<pre translate="no"><span class="attribute">@spec</span> previous_10s(<a href="https://hexdocs.pm/elixir/DateTime.html#t:t/0">DateTime.t</a>()) :: <a href="#t:unix_timestamp/0">unix_timestamp</a>()</pre>
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